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6" Kenwood speakers
Re: 6" Kenwood speakers
"Matt Ion" <soundy106@gmail . com > wrote in message
news:fvsena$oa3$1@registered.motzarella.org...
> Arny Krueger wrote:
>
>>> They are screwed down tight to the steel parcel
>>> shelf
>>> using a small amount of 1.6mm double sided tape at
>>> each fixing point, or which there are four for
>>> each
>>> speaker.
>>
>> You mean screw + tape, right?
>
> Ugh... there's half the problem there as well... the
> tape will be creating a gap between the speaker
> frame and the mounting points, which only serves to
> exacerbate the "leakage" problem. If you have to
> use something to physically isolate the speaker from
> the deck, use a "solid" foam, and use it all the way
> around. I've used "RV foam" before, a stick-on
> strip that seals up nicely (aka "weatherstripping
> tape"), when such a tactic is required. See an
> example here: * tinyurl . com /4mddxs
I know the stuff, use it in my work from time to time,
but it sounds like I could dispense with the tape
altogether.
>
> Building a solid wood deck and just attaching the
> speakers directly to that will be more effective,
> though.
That's for Sunday.
I've scored some 12mm particle board from a cabinet
maker mate.
>
>> I notice that Kenwood recommends using an angled
>> adaptor with these speakers, in a rear parcel shelf
>> application:
>>
>> * india.kenwood . com /products/car/speakers/kfc-m1628a/features.html
>
> That's just to "aim" the mids and highs. Won't help
> this issue at all.
"Matt Ion" <soundy106@gmail . com > wrote in message
news:fvsena$oa3$1@registered.motzarella.org...
> Arny Krueger wrote:
>
>>> They are screwed down tight to the steel parcel
>>> shelf
>>> using a small amount of 1.6mm double sided tape at
>>> each fixing point, or which there are four for
>>> each
>>> speaker.
>>
>> You mean screw + tape, right?
>
> Ugh... there's half the problem there as well... the
> tape will be creating a gap between the speaker
> frame and the mounting points, which only serves to
> exacerbate the "leakage" problem. If you have to
> use something to physically isolate the speaker from
> the deck, use a "solid" foam, and use it all the way
> around. I've used "RV foam" before, a stick-on
> strip that seals up nicely (aka "weatherstripping
> tape"), when such a tactic is required. See an
> example here: * tinyurl . com /4mddxs
I know the stuff, use it in my work from time to time,
but it sounds like I could dispense with the tape
altogether.
>
> Building a solid wood deck and just attaching the
> speakers directly to that will be more effective,
> though.
That's for Sunday.
I've scored some 12mm particle board from a cabinet
maker mate.
>
>> I notice that Kenwood recommends using an angled
>> adaptor with these speakers, in a rear parcel shelf
>> application:
>>
>> * india.kenwood . com /products/car/speakers/kfc-m1628a/features.html
>
> That's just to "aim" the mids and highs. Won't help
> this issue at all.
Re: 6" Kenwood speakers
Neil Green wrote:
> I know the stuff, use it in my work from time to time,
> but it sounds like I could dispense with the tape
> altogether.
Yeah, unless you need to seal tight against an uneven surface, you
really don't need any kind of foam.
>> Building a solid wood deck and just attaching the
>> speakers directly to that will be more effective,
>> though.
>
> That's for Sunday.
> I've scored some 12mm particle board from a cabinet
> maker mate.
That should do the trick, and it'll be a little more flexible than MDF,
which should make it a little easier to fit. It'll work alright for
this purpose, but just for future reference, particle board is NOT
recommended for speaker enclosures, especially sub boxes, because it's
not dense enough; MDF is usually the material of choice.
Neil Green wrote:
> I know the stuff, use it in my work from time to time,
> but it sounds like I could dispense with the tape
> altogether.
Yeah, unless you need to seal tight against an uneven surface, you
really don't need any kind of foam.
>> Building a solid wood deck and just attaching the
>> speakers directly to that will be more effective,
>> though.
>
> That's for Sunday.
> I've scored some 12mm particle board from a cabinet
> maker mate.
That should do the trick, and it'll be a little more flexible than MDF,
which should make it a little easier to fit. It'll work alright for
this purpose, but just for future reference, particle board is NOT
recommended for speaker enclosures, especially sub boxes, because it's
not dense enough; MDF is usually the material of choice.
Re: 6" Kenwood speakers
"Arny Krueger" <arnyk@hotpop . com > wrote in message
news:jr-dnfzQKrU8LLzVnZ2dnUVZ_u6dnZ2d@comcast . com ...
> "Neil Green" <nrgreenNOT@optusnet . com .au> wrote in
> message
> news:48215c65$0$1021$afc38c87@news.optusnet . com .au
>> "Arny Krueger" <arnyk@hotpop . com > wrote in message
>> news:Gc2dnWSGua6_1b3VnZ2dnUVZ_q-jnZ2d@comcast . com ...
>>> "Neil Green" <nrgreenNOT@optusnet . com .au> wrote in
>>> message
>>> news:481f9e14$0$17508$afc38c87@news.optusnet . com .au
>>>
>>>> My son bought some 6" Kenwood speakers from a
>>>> local
>>>> shop, not cheapies, and we installed them on the
>>>> rear
>>>> parcel shelf of his car on Sunday.
>>>
>>> A sort of a classic kind of installation.
>>>
>>>> If we crank the volume (to around 75%) and bass
>>>> up
>>>> the
>>>> distortion is really severe.
>>>
>>>
>>> Either the amplifier is clipping or the speakers
>>> are
>>> running out of stroke, or there is some kind of
>>> parasitic vibration.
>>>
>>> What can you tell us that will help us decide
>>> which
>>> one it is?
>>
>> Nothing really, I have little knowledge of these
>> things, but the distortion is coming from the
>> speakers
>> themselves in the form of a coarse vibration so I
>> doubt it has anything to do with the amplifier.
>>
>>>
>>>> You can see the cones bouncing up and down
>>>
>>> That's normal, to a point.
>>>
>>>> and they
>>>> make a vibrating sound which is very unpleasant
>>>> so
>>>> he
>>>> has to either lower the volume of reduce the bass
>>>> to
>>>> eliminate this noise.
>>>
>>> Sounds like a parasitic vibration, possibly caused
>>> by bad mechanical installation.
>>
>> They are screwed down tight to the steel parcel
>> shelf
>> using a small amount of 1.6mm double sided tape at
>> each fixing point, or which there are four for each
>> speaker.
>
> You mean screw + tape, right?
Yes.
>
>> I can't see how they could vibrate against the
>> body.
>
> Maybe the shelf itself, or a stiff covering...
The distortion is definately coming from the speaker
itself.
>
>>>> What I'd like to know is if this effect is just a
>>>> limitation of 6" speakers
>
>>> While 6" speakers are not the be-all or end-all, a
>>> pair of good ones can be pretty impressive in the
>>> small confines of a car. BTW, they are probably 6
>>> 1/2", as that is a near standard size.
>>>
>>>> or whether the speakers themselves aren't up to
>>>> par
>>>
>>> Without more details, how would anybody know?
>>> Model
>>> number????
>
>> Kenwood KFC - M1628A
>
> I get 6.25 inch nominal diameter.
>
> They are a $50/pair class 3-way, which I would not
> expect too much of.
$150 in Oz.
>
>> Not top of the range, but not rubbish, or so the
>> salesman assured my son.
>
> I would say, towards the bottom of the market
> segment.
Maybe.
It wouldn't be the first time a salesman has ripped
someone off.
>
>>>> or if there's any way of
>>>> reducing this distortion to acceptable levels.
>>>
>>> Turn them down. ;-)
>
>> Looks like he will.
>
> Rarely fails! ;-)
>
>>>> Would housing the speakers in boxes placed above
>>>> the
>>>> shelf help?
>
>>> Probably not. The trunk makes up a wonderful large
>>> enclosure for trapping the back wave of the right
>>> speaker drivers. With the right speakers, it can
>>> work very well.
>
> I notice that Kenwood recommends using an angled
> adaptor with these speakers, in a rear parcel shelf
> application:
>
> * india.kenwood . com /products/car/speakers/kfc-m1628a/features.html
I can easily make such a beast, but I doubt it will
reduce the distortion.
"Arny Krueger" <arnyk@hotpop . com > wrote in message
news:jr-dnfzQKrU8LLzVnZ2dnUVZ_u6dnZ2d@comcast . com ...
> "Neil Green" <nrgreenNOT@optusnet . com .au> wrote in
> message
> news:48215c65$0$1021$afc38c87@news.optusnet . com .au
>> "Arny Krueger" <arnyk@hotpop . com > wrote in message
>> news:Gc2dnWSGua6_1b3VnZ2dnUVZ_q-jnZ2d@comcast . com ...
>>> "Neil Green" <nrgreenNOT@optusnet . com .au> wrote in
>>> message
>>> news:481f9e14$0$17508$afc38c87@news.optusnet . com .au
>>>
>>>> My son bought some 6" Kenwood speakers from a
>>>> local
>>>> shop, not cheapies, and we installed them on the
>>>> rear
>>>> parcel shelf of his car on Sunday.
>>>
>>> A sort of a classic kind of installation.
>>>
>>>> If we crank the volume (to around 75%) and bass
>>>> up
>>>> the
>>>> distortion is really severe.
>>>
>>>
>>> Either the amplifier is clipping or the speakers
>>> are
>>> running out of stroke, or there is some kind of
>>> parasitic vibration.
>>>
>>> What can you tell us that will help us decide
>>> which
>>> one it is?
>>
>> Nothing really, I have little knowledge of these
>> things, but the distortion is coming from the
>> speakers
>> themselves in the form of a coarse vibration so I
>> doubt it has anything to do with the amplifier.
>>
>>>
>>>> You can see the cones bouncing up and down
>>>
>>> That's normal, to a point.
>>>
>>>> and they
>>>> make a vibrating sound which is very unpleasant
>>>> so
>>>> he
>>>> has to either lower the volume of reduce the bass
>>>> to
>>>> eliminate this noise.
>>>
>>> Sounds like a parasitic vibration, possibly caused
>>> by bad mechanical installation.
>>
>> They are screwed down tight to the steel parcel
>> shelf
>> using a small amount of 1.6mm double sided tape at
>> each fixing point, or which there are four for each
>> speaker.
>
> You mean screw + tape, right?
Yes.
>
>> I can't see how they could vibrate against the
>> body.
>
> Maybe the shelf itself, or a stiff covering...
The distortion is definately coming from the speaker
itself.
>
>>>> What I'd like to know is if this effect is just a
>>>> limitation of 6" speakers
>
>>> While 6" speakers are not the be-all or end-all, a
>>> pair of good ones can be pretty impressive in the
>>> small confines of a car. BTW, they are probably 6
>>> 1/2", as that is a near standard size.
>>>
>>>> or whether the speakers themselves aren't up to
>>>> par
>>>
>>> Without more details, how would anybody know?
>>> Model
>>> number????
>
>> Kenwood KFC - M1628A
>
> I get 6.25 inch nominal diameter.
>
> They are a $50/pair class 3-way, which I would not
> expect too much of.
$150 in Oz.
>
>> Not top of the range, but not rubbish, or so the
>> salesman assured my son.
>
> I would say, towards the bottom of the market
> segment.
Maybe.
It wouldn't be the first time a salesman has ripped
someone off.
>
>>>> or if there's any way of
>>>> reducing this distortion to acceptable levels.
>>>
>>> Turn them down. ;-)
>
>> Looks like he will.
>
> Rarely fails! ;-)
>
>>>> Would housing the speakers in boxes placed above
>>>> the
>>>> shelf help?
>
>>> Probably not. The trunk makes up a wonderful large
>>> enclosure for trapping the back wave of the right
>>> speaker drivers. With the right speakers, it can
>>> work very well.
>
> I notice that Kenwood recommends using an angled
> adaptor with these speakers, in a rear parcel shelf
> application:
>
> * india.kenwood . com /products/car/speakers/kfc-m1628a/features.html
I can easily make such a beast, but I doubt it will
reduce the distortion.
Re: 6" Kenwood speakers
"Neil Green" <nrgreenNOT@optusnet . com .au> wrote in message
news:4822ae62$0$30465$afc38c87@news.optusnet . com .au...
>
> "Arny Krueger" <arnyk@hotpop . com > wrote in message
> news:jr-dnfzQKrU8LLzVnZ2dnUVZ_u6dnZ2d@comcast . com ...
>> "Neil Green" <nrgreenNOT@optusnet . com .au> wrote in message
>> news:48215c65$0$1021$afc38c87@news.optusnet . com .au
>>> "Arny Krueger" <arnyk@hotpop . com > wrote in message
>>> news:Gc2dnWSGua6_1b3VnZ2dnUVZ_q-jnZ2d@comcast . com ...
>>>> "Neil Green" <nrgreenNOT@optusnet . com .au> wrote in
>>>> message
>>>> news:481f9e14$0$17508$afc38c87@news.optusnet . com .au
>>>>
>>>>> My son bought some 6" Kenwood speakers from a local
>>>>> shop, not cheapies, and we installed them on the
>>>>> rear
>>>>> parcel shelf of his car on Sunday.
>>>>
>>>> A sort of a classic kind of installation.
>>>>
>>>>> If we crank the volume (to around 75%) and bass up
>>>>> the
>>>>> distortion is really severe.
>>>>
>>>>
>>>> Either the amplifier is clipping or the speakers are
>>>> running out of stroke, or there is some kind of
>>>> parasitic vibration.
>>>>
>>>> What can you tell us that will help us decide which
>>>> one it is?
>>>
>>> Nothing really, I have little knowledge of these
>>> things, but the distortion is coming from the speakers
>>> themselves in the form of a coarse vibration so I
>>> doubt it has anything to do with the amplifier.
>>>
>>>>
>>>>> You can see the cones bouncing up and down
>>>>
>>>> That's normal, to a point.
>>>>
>>>>> and they
>>>>> make a vibrating sound which is very unpleasant so
>>>>> he
>>>>> has to either lower the volume of reduce the bass
>>>>> to
>>>>> eliminate this noise.
>>>>
>>>> Sounds like a parasitic vibration, possibly caused
>>>> by bad mechanical installation.
>>>
>>> They are screwed down tight to the steel parcel shelf
>>> using a small amount of 1.6mm double sided tape at
>>> each fixing point, or which there are four for each
>>> speaker.
>>
>> You mean screw + tape, right?
>
> Yes.
>
>>
>>> I can't see how they could vibrate against the body.
>>
>> Maybe the shelf itself, or a stiff covering...
>
> The distortion is definately coming from the speaker itself.
>
>>
>>>>> What I'd like to know is if this effect is just a
>>>>> limitation of 6" speakers
>>
>>>> While 6" speakers are not the be-all or end-all, a
>>>> pair of good ones can be pretty impressive in the
>>>> small confines of a car. BTW, they are probably 6
>>>> 1/2", as that is a near standard size.
>>>>
>>>>> or whether the speakers themselves aren't up to par
>>>>
>>>> Without more details, how would anybody know? Model
>>>> number????
>>
>>> Kenwood KFC - M1628A
>>
>> I get 6.25 inch nominal diameter.
>>
>> They are a $50/pair class 3-way, which I would not expect too much of.
>
> $150 in Oz.
>
>>
>>> Not top of the range, but not rubbish, or so the
>>> salesman assured my son.
>>
>> I would say, towards the bottom of the market segment.
>
> Maybe.
> It wouldn't be the first time a salesman has ripped someone off.
>
>>
>>>>> or if there's any way of
>>>>> reducing this distortion to acceptable levels.
>>>>
>>>> Turn them down. ;-)
>>
>>> Looks like he will.
>>
>> Rarely fails! ;-)
>>
>>>>> Would housing the speakers in boxes placed above
>>>>> the
>>>>> shelf help?
>>
>>>> Probably not. The trunk makes up a wonderful large
>>>> enclosure for trapping the back wave of the right
>>>> speaker drivers. With the right speakers, it can
>>>> work very well.
>>
>> I notice that Kenwood recommends using an angled adaptor with these
>> speakers, in a rear parcel shelf application:
>>
>> * india.kenwood . com /products/car/speakers/kfc-m1628a/features.html
>
> I can easily make such a beast, but I doubt it will reduce the distortion.
It could provide additional stiffness and mass, as well as better
distribution of the highs.
"Neil Green" <nrgreenNOT@optusnet . com .au> wrote in message
news:4822ae62$0$30465$afc38c87@news.optusnet . com .au...
>
> "Arny Krueger" <arnyk@hotpop . com > wrote in message
> news:jr-dnfzQKrU8LLzVnZ2dnUVZ_u6dnZ2d@comcast . com ...
>> "Neil Green" <nrgreenNOT@optusnet . com .au> wrote in message
>> news:48215c65$0$1021$afc38c87@news.optusnet . com .au
>>> "Arny Krueger" <arnyk@hotpop . com > wrote in message
>>> news:Gc2dnWSGua6_1b3VnZ2dnUVZ_q-jnZ2d@comcast . com ...
>>>> "Neil Green" <nrgreenNOT@optusnet . com .au> wrote in
>>>> message
>>>> news:481f9e14$0$17508$afc38c87@news.optusnet . com .au
>>>>
>>>>> My son bought some 6" Kenwood speakers from a local
>>>>> shop, not cheapies, and we installed them on the
>>>>> rear
>>>>> parcel shelf of his car on Sunday.
>>>>
>>>> A sort of a classic kind of installation.
>>>>
>>>>> If we crank the volume (to around 75%) and bass up
>>>>> the
>>>>> distortion is really severe.
>>>>
>>>>
>>>> Either the amplifier is clipping or the speakers are
>>>> running out of stroke, or there is some kind of
>>>> parasitic vibration.
>>>>
>>>> What can you tell us that will help us decide which
>>>> one it is?
>>>
>>> Nothing really, I have little knowledge of these
>>> things, but the distortion is coming from the speakers
>>> themselves in the form of a coarse vibration so I
>>> doubt it has anything to do with the amplifier.
>>>
>>>>
>>>>> You can see the cones bouncing up and down
>>>>
>>>> That's normal, to a point.
>>>>
>>>>> and they
>>>>> make a vibrating sound which is very unpleasant so
>>>>> he
>>>>> has to either lower the volume of reduce the bass
>>>>> to
>>>>> eliminate this noise.
>>>>
>>>> Sounds like a parasitic vibration, possibly caused
>>>> by bad mechanical installation.
>>>
>>> They are screwed down tight to the steel parcel shelf
>>> using a small amount of 1.6mm double sided tape at
>>> each fixing point, or which there are four for each
>>> speaker.
>>
>> You mean screw + tape, right?
>
> Yes.
>
>>
>>> I can't see how they could vibrate against the body.
>>
>> Maybe the shelf itself, or a stiff covering...
>
> The distortion is definately coming from the speaker itself.
>
>>
>>>>> What I'd like to know is if this effect is just a
>>>>> limitation of 6" speakers
>>
>>>> While 6" speakers are not the be-all or end-all, a
>>>> pair of good ones can be pretty impressive in the
>>>> small confines of a car. BTW, they are probably 6
>>>> 1/2", as that is a near standard size.
>>>>
>>>>> or whether the speakers themselves aren't up to par
>>>>
>>>> Without more details, how would anybody know? Model
>>>> number????
>>
>>> Kenwood KFC - M1628A
>>
>> I get 6.25 inch nominal diameter.
>>
>> They are a $50/pair class 3-way, which I would not expect too much of.
>
> $150 in Oz.
>
>>
>>> Not top of the range, but not rubbish, or so the
>>> salesman assured my son.
>>
>> I would say, towards the bottom of the market segment.
>
> Maybe.
> It wouldn't be the first time a salesman has ripped someone off.
>
>>
>>>>> or if there's any way of
>>>>> reducing this distortion to acceptable levels.
>>>>
>>>> Turn them down. ;-)
>>
>>> Looks like he will.
>>
>> Rarely fails! ;-)
>>
>>>>> Would housing the speakers in boxes placed above
>>>>> the
>>>>> shelf help?
>>
>>>> Probably not. The trunk makes up a wonderful large
>>>> enclosure for trapping the back wave of the right
>>>> speaker drivers. With the right speakers, it can
>>>> work very well.
>>
>> I notice that Kenwood recommends using an angled adaptor with these
>> speakers, in a rear parcel shelf application:
>>
>> * india.kenwood . com /products/car/speakers/kfc-m1628a/features.html
>
> I can easily make such a beast, but I doubt it will reduce the distortion.
It could provide additional stiffness and mass, as well as better
distribution of the highs.
Re: 6" Kenwood speakers
"Arny Krueger" <arnyk@hotpop . com > wrote in message
news:Ko6dncWSgNGrfr_VnZ2dnUVZ_u6dnZ2d@comcast . com ...
>
> "Neil Green" <nrgreenNOT@optusnet . com .au> wrote in
> message
> news:4822ae62$0$30465$afc38c87@news.optusnet . com .au...
>>
>> "Arny Krueger" <arnyk@hotpop . com > wrote in message
>> news:jr-dnfzQKrU8LLzVnZ2dnUVZ_u6dnZ2d@comcast . com ...
>>> "Neil Green" <nrgreenNOT@optusnet . com .au> wrote in
>>> message
>>> news:48215c65$0$1021$afc38c87@news.optusnet . com .au
>>>> "Arny Krueger" <arnyk@hotpop . com > wrote in
>>>> message
>>>> news:Gc2dnWSGua6_1b3VnZ2dnUVZ_q-jnZ2d@comcast . com ...
>>>>> "Neil Green" <nrgreenNOT@optusnet . com .au> wrote
>>>>> in
>>>>> message
>>>>> news:481f9e14$0$17508$afc38c87@news.optusnet . com .au
>>>>>
>>>>>> My son bought some 6" Kenwood speakers from a
>>>>>> local
>>>>>> shop, not cheapies, and we installed them on
>>>>>> the
>>>>>> rear
>>>>>> parcel shelf of his car on Sunday.
>>>>>
>>>>> A sort of a classic kind of installation.
>>>>>
>>>>>> If we crank the volume (to around 75%) and bass
>>>>>> up
>>>>>> the
>>>>>> distortion is really severe.
>>>>>
>>>>>
>>>>> Either the amplifier is clipping or the speakers
>>>>> are
>>>>> running out of stroke, or there is some kind of
>>>>> parasitic vibration.
>>>>>
>>>>> What can you tell us that will help us decide
>>>>> which
>>>>> one it is?
>>>>
>>>> Nothing really, I have little knowledge of these
>>>> things, but the distortion is coming from the
>>>> speakers
>>>> themselves in the form of a coarse vibration so I
>>>> doubt it has anything to do with the amplifier.
>>>>
>>>>>
>>>>>> You can see the cones bouncing up and down
>>>>>
>>>>> That's normal, to a point.
>>>>>
>>>>>> and they
>>>>>> make a vibrating sound which is very unpleasant
>>>>>> so
>>>>>> he
>>>>>> has to either lower the volume of reduce the
>>>>>> bass
>>>>>> to
>>>>>> eliminate this noise.
>>>>>
>>>>> Sounds like a parasitic vibration, possibly
>>>>> caused
>>>>> by bad mechanical installation.
>>>>
>>>> They are screwed down tight to the steel parcel
>>>> shelf
>>>> using a small amount of 1.6mm double sided tape
>>>> at
>>>> each fixing point, or which there are four for
>>>> each
>>>> speaker.
>>>
>>> You mean screw + tape, right?
>>
>> Yes.
>>
>>>
>>>> I can't see how they could vibrate against the
>>>> body.
>>>
>>> Maybe the shelf itself, or a stiff covering...
>>
>> The distortion is definately coming from the
>> speaker itself.
>>
>>>
>>>>>> What I'd like to know is if this effect is just
>>>>>> a
>>>>>> limitation of 6" speakers
>>>
>>>>> While 6" speakers are not the be-all or end-all,
>>>>> a
>>>>> pair of good ones can be pretty impressive in
>>>>> the
>>>>> small confines of a car. BTW, they are probably
>>>>> 6
>>>>> 1/2", as that is a near standard size.
>>>>>
>>>>>> or whether the speakers themselves aren't up to
>>>>>> par
>>>>>
>>>>> Without more details, how would anybody know?
>>>>> Model
>>>>> number????
>>>
>>>> Kenwood KFC - M1628A
>>>
>>> I get 6.25 inch nominal diameter.
>>>
>>> They are a $50/pair class 3-way, which I would not
>>> expect too much of.
>>
>> $150 in Oz.
>>
>>>
>>>> Not top of the range, but not rubbish, or so the
>>>> salesman assured my son.
>>>
>>> I would say, towards the bottom of the market
>>> segment.
>>
>> Maybe.
>> It wouldn't be the first time a salesman has ripped
>> someone off.
>>
>>>
>>>>>> or if there's any way of
>>>>>> reducing this distortion to acceptable levels.
>>>>>
>>>>> Turn them down. ;-)
>>>
>>>> Looks like he will.
>>>
>>> Rarely fails! ;-)
>>>
>>>>>> Would housing the speakers in boxes placed
>>>>>> above
>>>>>> the
>>>>>> shelf help?
>>>
>>>>> Probably not. The trunk makes up a wonderful
>>>>> large
>>>>> enclosure for trapping the back wave of the
>>>>> right
>>>>> speaker drivers. With the right speakers, it can
>>>>> work very well.
>>>
>>> I notice that Kenwood recommends using an angled
>>> adaptor with these speakers, in a rear parcel
>>> shelf application:
>>>
>>> * india.kenwood . com /products/car/speakers/kfc-m1628a/features.html
>>
>> I can easily make such a beast, but I doubt it will
>> reduce the distortion.
>
> It could provide additional stiffness and mass, as
> well as better distribution of the highs.
Maybe, and it'll give me something to do as well.
On Matt's advice I'm going to make an insert for the
parcel shelf, and a couple of angled enclosures won't
take long.
Thanks for the tips.
"Arny Krueger" <arnyk@hotpop . com > wrote in message
news:Ko6dncWSgNGrfr_VnZ2dnUVZ_u6dnZ2d@comcast . com ...
>
> "Neil Green" <nrgreenNOT@optusnet . com .au> wrote in
> message
> news:4822ae62$0$30465$afc38c87@news.optusnet . com .au...
>>
>> "Arny Krueger" <arnyk@hotpop . com > wrote in message
>> news:jr-dnfzQKrU8LLzVnZ2dnUVZ_u6dnZ2d@comcast . com ...
>>> "Neil Green" <nrgreenNOT@optusnet . com .au> wrote in
>>> message
>>> news:48215c65$0$1021$afc38c87@news.optusnet . com .au
>>>> "Arny Krueger" <arnyk@hotpop . com > wrote in
>>>> message
>>>> news:Gc2dnWSGua6_1b3VnZ2dnUVZ_q-jnZ2d@comcast . com ...
>>>>> "Neil Green" <nrgreenNOT@optusnet . com .au> wrote
>>>>> in
>>>>> message
>>>>> news:481f9e14$0$17508$afc38c87@news.optusnet . com .au
>>>>>
>>>>>> My son bought some 6" Kenwood speakers from a
>>>>>> local
>>>>>> shop, not cheapies, and we installed them on
>>>>>> the
>>>>>> rear
>>>>>> parcel shelf of his car on Sunday.
>>>>>
>>>>> A sort of a classic kind of installation.
>>>>>
>>>>>> If we crank the volume (to around 75%) and bass
>>>>>> up
>>>>>> the
>>>>>> distortion is really severe.
>>>>>
>>>>>
>>>>> Either the amplifier is clipping or the speakers
>>>>> are
>>>>> running out of stroke, or there is some kind of
>>>>> parasitic vibration.
>>>>>
>>>>> What can you tell us that will help us decide
>>>>> which
>>>>> one it is?
>>>>
>>>> Nothing really, I have little knowledge of these
>>>> things, but the distortion is coming from the
>>>> speakers
>>>> themselves in the form of a coarse vibration so I
>>>> doubt it has anything to do with the amplifier.
>>>>
>>>>>
>>>>>> You can see the cones bouncing up and down
>>>>>
>>>>> That's normal, to a point.
>>>>>
>>>>>> and they
>>>>>> make a vibrating sound which is very unpleasant
>>>>>> so
>>>>>> he
>>>>>> has to either lower the volume of reduce the
>>>>>> bass
>>>>>> to
>>>>>> eliminate this noise.
>>>>>
>>>>> Sounds like a parasitic vibration, possibly
>>>>> caused
>>>>> by bad mechanical installation.
>>>>
>>>> They are screwed down tight to the steel parcel
>>>> shelf
>>>> using a small amount of 1.6mm double sided tape
>>>> at
>>>> each fixing point, or which there are four for
>>>> each
>>>> speaker.
>>>
>>> You mean screw + tape, right?
>>
>> Yes.
>>
>>>
>>>> I can't see how they could vibrate against the
>>>> body.
>>>
>>> Maybe the shelf itself, or a stiff covering...
>>
>> The distortion is definately coming from the
>> speaker itself.
>>
>>>
>>>>>> What I'd like to know is if this effect is just
>>>>>> a
>>>>>> limitation of 6" speakers
>>>
>>>>> While 6" speakers are not the be-all or end-all,
>>>>> a
>>>>> pair of good ones can be pretty impressive in
>>>>> the
>>>>> small confines of a car. BTW, they are probably
>>>>> 6
>>>>> 1/2", as that is a near standard size.
>>>>>
>>>>>> or whether the speakers themselves aren't up to
>>>>>> par
>>>>>
>>>>> Without more details, how would anybody know?
>>>>> Model
>>>>> number????
>>>
>>>> Kenwood KFC - M1628A
>>>
>>> I get 6.25 inch nominal diameter.
>>>
>>> They are a $50/pair class 3-way, which I would not
>>> expect too much of.
>>
>> $150 in Oz.
>>
>>>
>>>> Not top of the range, but not rubbish, or so the
>>>> salesman assured my son.
>>>
>>> I would say, towards the bottom of the market
>>> segment.
>>
>> Maybe.
>> It wouldn't be the first time a salesman has ripped
>> someone off.
>>
>>>
>>>>>> or if there's any way of
>>>>>> reducing this distortion to acceptable levels.
>>>>>
>>>>> Turn them down. ;-)
>>>
>>>> Looks like he will.
>>>
>>> Rarely fails! ;-)
>>>
>>>>>> Would housing the speakers in boxes placed
>>>>>> above
>>>>>> the
>>>>>> shelf help?
>>>
>>>>> Probably not. The trunk makes up a wonderful
>>>>> large
>>>>> enclosure for trapping the back wave of the
>>>>> right
>>>>> speaker drivers. With the right speakers, it can
>>>>> work very well.
>>>
>>> I notice that Kenwood recommends using an angled
>>> adaptor with these speakers, in a rear parcel
>>> shelf application:
>>>
>>> * india.kenwood . com /products/car/speakers/kfc-m1628a/features.html
>>
>> I can easily make such a beast, but I doubt it will
>> reduce the distortion.
>
> It could provide additional stiffness and mass, as
> well as better distribution of the highs.
Maybe, and it'll give me something to do as well.
On Matt's advice I'm going to make an insert for the
parcel shelf, and a couple of angled enclosures won't
take long.
Thanks for the tips.
Re: 6" Kenwood speakers
Neil Green wrote:
> Maybe, and it'll give me something to do as well.
> On Matt's advice I'm going to make an insert for the
> parcel shelf, and a couple of angled enclosures won't
> take long.
> Thanks for the tips.
Well, we'll look forward to seeing some pictures of your creation.
Main thing to remember through this is that the purpose of it all is to
keep the front and back of the speaker cones separated as much as
possible, so make sure the angled pieces, if you make them, seal well
against the shelf, and that the speakers seal against them. Don't need
to use silicone or anything, just make sure they're smooth and the
speakers are snug.
Neil Green wrote:
> Maybe, and it'll give me something to do as well.
> On Matt's advice I'm going to make an insert for the
> parcel shelf, and a couple of angled enclosures won't
> take long.
> Thanks for the tips.
Well, we'll look forward to seeing some pictures of your creation.
Main thing to remember through this is that the purpose of it all is to
keep the front and back of the speaker cones separated as much as
possible, so make sure the angled pieces, if you make them, seal well
against the shelf, and that the speakers seal against them. Don't need
to use silicone or anything, just make sure they're smooth and the
speakers are snug.
Re: 6" Kenwood speakers
"Matt Ion" <soundy106@gmail . com > wrote in message
news:fvv3kv$2b3$2@registered.motzarella.org...
> Neil Green wrote:
>
>> Maybe, and it'll give me something to do as well.
>> On Matt's advice I'm going to make an insert for
>> the parcel shelf, and a couple of angled enclosures
>> won't take long.
>> Thanks for the tips.
>
> Well, we'll look forward to seeing some pictures of
> your creation.
>
> Main thing to remember through this is that the
> purpose of it all is to keep the front and back of
> the speaker cones separated as much as possible, so
> make sure the angled pieces, if you make them, seal
> well against the shelf, and that the speakers seal
> against them. Don't need to use silicone or
> anything, just make sure they're smooth and the
> speakers are snug.
Yep.
If I make them I'll post the pics, along with an
appraisal of how it all works.
"Matt Ion" <soundy106@gmail . com > wrote in message
news:fvv3kv$2b3$2@registered.motzarella.org...
> Neil Green wrote:
>
>> Maybe, and it'll give me something to do as well.
>> On Matt's advice I'm going to make an insert for
>> the parcel shelf, and a couple of angled enclosures
>> won't take long.
>> Thanks for the tips.
>
> Well, we'll look forward to seeing some pictures of
> your creation.
>
> Main thing to remember through this is that the
> purpose of it all is to keep the front and back of
> the speaker cones separated as much as possible, so
> make sure the angled pieces, if you make them, seal
> well against the shelf, and that the speakers seal
> against them. Don't need to use silicone or
> anything, just make sure they're smooth and the
> speakers are snug.
Yep.
If I make them I'll post the pics, along with an
appraisal of how it all works.
Re: 6" Kenwood speakers
"Matt Ion" <soundy106@gmail . com > wrote in message
news:fvv3kv$2b3$2@registered.motzarella.org...
> Neil Green wrote:
>
>> Maybe, and it'll give me something to do as well.
>> On Matt's advice I'm going to make an insert for
>> the parcel shelf, and a couple of angled enclosures
>> won't take long.
>> Thanks for the tips.
>
> Well, we'll look forward to seeing some pictures of
> your creation.
>
> Main thing to remember through this is that the
> purpose of it all is to keep the front and back of
> the speaker cones separated as much as possible, so
> make sure the angled pieces, if you make them, seal
> well against the shelf, and that the speakers seal
> against them. Don't need to use silicone or
> anything, just make sure they're smooth and the
> speakers are snug.
Made the angled enclosures today, but couldn't cut the
shelf insert as the car was at the mechanics for most
of the day getting serviced and Boy Wonder went
straight from the garage to pick up his girlfriend.
Tomorrow's Mothers Day in this part of the world so
project "improve the bass in the Nissan" will have to
wait till next weekend.
Keep you posted Matt.
Cheers
Neil.
"Matt Ion" <soundy106@gmail . com > wrote in message
news:fvv3kv$2b3$2@registered.motzarella.org...
> Neil Green wrote:
>
>> Maybe, and it'll give me something to do as well.
>> On Matt's advice I'm going to make an insert for
>> the parcel shelf, and a couple of angled enclosures
>> won't take long.
>> Thanks for the tips.
>
> Well, we'll look forward to seeing some pictures of
> your creation.
>
> Main thing to remember through this is that the
> purpose of it all is to keep the front and back of
> the speaker cones separated as much as possible, so
> make sure the angled pieces, if you make them, seal
> well against the shelf, and that the speakers seal
> against them. Don't need to use silicone or
> anything, just make sure they're smooth and the
> speakers are snug.
Made the angled enclosures today, but couldn't cut the
shelf insert as the car was at the mechanics for most
of the day getting serviced and Boy Wonder went
straight from the garage to pick up his girlfriend.
Tomorrow's Mothers Day in this part of the world so
project "improve the bass in the Nissan" will have to
wait till next weekend.
Keep you posted Matt.
Cheers
Neil.
