Car Audio Advice from the Audio Gurus: Use "Search thread" before posting a new Q!

DerAlte · 14th October 2010, 20:29

Quote:

Originally Posted by S00p

... any after market solution ... to fill the glaring gap i'd have if i were to replace polo's stock HU with a single din HU? ...

One needs a 'dash kit' - available from VW as well as on the 'net. Off-the-shelf after-market for VW will take some more time in India.

Quote:

Originally Posted by S00p

... mid bass drivers in the front doors of Polo require cutting the door, or would they fit cosily behind the stock grills? ...

Proper mounting locations are provided in the doors for standard-sized speakers

normally_crazy · 14th October 2010, 20:53

My civic has the aux in not the usb option of the new civic. So I now use a ipod charger and a jack to aux in to play music of the ipod. Its terribly distracting as the music control is through the ipod.

What options do I have to get the HU read the ipod?

Get a HU of the new civic if someone is discarding it.

Can I get it from Honda ? Is this a simple solution - I mean is it plug n play ?

Or I use the HK D+P ?

Any other option ?

normally_crazy · 16th October 2010, 20:32

^^^^^ - no one ????????

abhibh · 16th October 2010, 21:29

Quote:

Originally Posted by normally_crazy

My civic has the aux in not the usb option of the new civic. So I now use a ipod charger and a jack to aux in to play music of the ipod. Its terribly distracting as the music control is through the ipod.

What options do I have to get the HU read the ipod?

Get a HU of the new civic if someone is discarding it.

Can I get it from Honda ? Is this a simple solution - I mean is it plug n play ?

Or I use the HK D+P ?

Any other option ?

NC you answered your own question. The best will be HK D+P if you are unable to find the HU.

You can get the new HU from Honda but its gonna cost somewhere around upwards of 20k i guess.

diesel_maniac · 17th October 2010, 12:03

Hi Gurus,

I seen in some of the install pictures of the Net that Sub enclosures are lined with some sort of material like Glass wool or other such damping/insulating material.

I would like to know what are the benefit/ drawback of filling/lining the sub enclosure with such material?
Secondly does one needs to consider the volume of material being used and adjust the dimensions of the box at design stage to achieve the ideal volume for the box?
Thirdly can one use the non woven fiber mat that is pasted to the underside of the carpets used in our cars?

Also does anybody in or around Delhi know of a place or market from where one can buy materal for fiber glass moudling, any help on this will be highly appreciated.

Regards

Jasvinder

DerAlte · 17th October 2010, 13:28

Glass wool or Poly-fill (same as that used in pillows and cushions) damps out the rear wave of the sub in a sealed enclosure. This prevents resonance in the enclosure, which changes the characteristic of the sub. The material should not be pressed flat - it should be left flocked (loose pile).

Stuffed in large quantities, it serves to make the box appear a volume larger than it is physically.

Since the effective density of the material is low (~10% or less of what it seems), it is a rather insignificant fraction of the enclosure volume.

Use carpet felt for the same purpose? Sure one could, but since the effective density is much more (>70%), one has to figure out how to make a loose roll and make it stand behind the sub. Pasted on the inside walls is not going to be effective with felt - too thin to provide any resistance in the box volume.

diesel_maniac · 17th October 2010, 17:55

@DerAlte: Thanks for the information. Poly Fill will be easy to find and handle with regard to Glass wool. Would a single layer of material that is available with home furnishing guys enough or should multiple layer be used?

donarun · 17th October 2010, 19:55

Quote:

Originally Posted by DerAlte

Glass wool or Poly-fill (same as that used in pillows and cushions) damps out the rear wave of the sub in a sealed enclosure. This prevents resonance in the enclosure, which changes the characteristic of the sub. The material should not be pressed flat - it should be left flocked (loose pile).

@Der - Is a pictorial representation of the same available ?

abhipuru16 · 17th October 2010, 23:15

What is edge steepness?

navin · 18th October 2010, 10:26

Quote:

Originally Posted by normally_crazy

What options do I have to get the HU read the ipod?
1. Get a HU of the new civic if someoneis discarding it.
2. Or I use the HK D+P ?

NC ask GTO if his Civic's HU is still around. he relaced the HU of his Civic some months back.

Quote:

Originally Posted by abhipuru16

What is edge steepness?

In what context? There is edge diffraction and baffle step compensation both of which are related to speaker boxes, there is also the steepness of a crosoover (slope), ....

DerAlte · 18th October 2010, 11:46

Quote:

Originally Posted by diesel_maniac

... Would a single layer of material that is available with home furnishing guys enough or should multiple layer be used?

Not sure what you meant by 'single layer' - you need 2-3" thickness.(in original fluffy state).

Quote:

Originally Posted by donarun

... pictorial representation ...

Car Audio Advice from the Audio Gurus: Use "Search thread" before posting a new Q!-polyfill.jpg

abhipuru16 · 28th October 2010, 11:44

Guys
How do I ''fix'' the subwoofer in my Fiesta's boot. The problem is that after driving for a while, the subwoofer gets a mind of it's own and starts dancing in the boot. I mean it doesn't stay where it was put. Sometimes it comes all the way to the boot entrance. The subwoofer is an Infinity Reference 1240SE which comes with it's own ported enclosure.

navin · 28th October 2010, 16:07

Quote:

Originally Posted by abhipuru16

the subwoofer gets a mind of it's own and starts dancing in the boot.

Velcro .

sajjt · 28th October 2010, 16:36

Quote:

Originally Posted by abhipuru16

Guys
How do I ''fix'' the subwoofer in my Fiesta's boot. The problem is that after driving for a while, the subwoofer gets a mind of it's own and starts dancing in the boot. I mean it doesn't stay where it was put. Sometimes it comes all the way to the boot entrance. The subwoofer is an Infinity Reference 1240SE which comes with it's own ported enclosure.

I've placed a vinyl sheet in the boot which made this worse.

Quote:

Originally Posted by navin

Velcro .

Thank you Navin, I was also searching for a simple DIY thingy to keep this in place. Whenever I open the boot, the SW will be there in the center of the boot to greet me.

Will a 2" square for 4 corners to hold approx 30Kg box or should I've to stick this all the way below the enclosure? What do you suggest?

ajay_satpute · 28th October 2010, 18:01

Experts:

I want to add 2 speakers on the parcel trey in the boot for my Vista. Since, the boot has poor space, i don't want to block any part of it with speakers.

For your info, there are already 6 speakers in the car which came by default, as it is the top-end Vista. 1 in each door and 2 tweeters on the dash. However, I think the bass can be better. So thought of adding 2 speakers on the parcel trey.

Please suggest:
1) Feasibility: Whether its worth and/or possible.
2) Brand
3) Output
4) Type (oval, etc...)

14th October 2010, 20:53	#10457
normally_crazy Senior - BHPian Join Date: Feb 2004 Location: Mumbai Posts: 4,305 Thanked: 543 Times View My Garage	My civic has the aux in not the usb option of the new civic. So I now use a ipod charger and a jack to aux in to play music of the ipod. Its terribly distracting as the music control is through the ipod. What options do I have to get the HU read the ipod? Get a HU of the new civic if someone is discarding it. Can I get it from Honda ? Is this a simple solution - I mean is it plug n play ? Or I use the HK D+P ? Any other option ?
	() Thanks

16th October 2010, 20:32	#10458
normally_crazy Senior - BHPian Join Date: Feb 2004 Location: Mumbai Posts: 4,305 Thanked: 543 Times View My Garage	^^^^^ - no one ????????
	() Thanks

17th October 2010, 12:03	#10460
diesel_maniac BHPian Join Date: Jun 2007 Location: Delhi Posts: 170 Thanked: 3 Times	Subwoofer enclosure design and filling !! Hi Gurus, I seen in some of the install pictures of the Net that Sub enclosures are lined with some sort of material like Glass wool or other such damping/insulating material. I would like to know what are the benefit/ drawback of filling/lining the sub enclosure with such material? Secondly does one needs to consider the volume of material being used and adjust the dimensions of the box at design stage to achieve the ideal volume for the box? Thirdly can one use the non woven fiber mat that is pasted to the underside of the carpets used in our cars? Also does anybody in or around Delhi know of a place or market from where one can buy materal for fiber glass moudling, any help on this will be highly appreciated. Regards Jasvinder
	() Thanks

17th October 2010, 13:28	#10461
DerAlte Senior - BHPian Join Date: Mar 2007 Location: Bangalore Posts: 8,035 Thanked: 2,920 Times	Glass wool or Poly-fill (same as that used in pillows and cushions) damps out the rear wave of the sub in a sealed enclosure. This prevents resonance in the enclosure, which changes the characteristic of the sub. The material should not be pressed flat - it should be left flocked (loose pile). Stuffed in large quantities, it serves to make the box appear a volume larger than it is physically. Since the effective density of the material is low (~10% or less of what it seems), it is a rather insignificant fraction of the enclosure volume. Use carpet felt for the same purpose? Sure one could, but since the effective density is much more (>70%), one has to figure out how to make a loose roll and make it stand behind the sub. Pasted on the inside walls is not going to be effective with felt - too thin to provide any resistance in the box volume.
	() Thanks

17th October 2010, 17:55	#10462
diesel_maniac BHPian Join Date: Jun 2007 Location: Delhi Posts: 170 Thanked: 3 Times	@DerAlte: Thanks for the information. Poly Fill will be easy to find and handle with regard to Glass wool. Would a single layer of material that is available with home furnishing guys enough or should multiple layer be used?
	() Thanks

17th October 2010, 23:15	#10464
abhipuru16 BHPian Join Date: Dec 2009 Location: Faridabad Posts: 719 Thanked: 40 Times	What is edge steepness?
	() Thanks

28th October 2010, 11:44	#10467
abhipuru16 BHPian Join Date: Dec 2009 Location: Faridabad Posts: 719 Thanked: 40 Times	Guys How do I ''fix'' the subwoofer in my Fiesta's boot. The problem is that after driving for a while, the subwoofer gets a mind of it's own and starts dancing in the boot. I mean it doesn't stay where it was put. Sometimes it comes all the way to the boot entrance. The subwoofer is an Infinity Reference 1240SE which comes with it's own ported enclosure.
	() Thanks

28th October 2010, 18:01	#10470
ajay_satpute Senior - BHPian Join Date: Oct 2009 Location: Pune Posts: 1,957 Thanked: 1,711 Times View My Garage	Experts: I want to add 2 speakers on the parcel trey in the boot for my Vista. Since, the boot has poor space, i don't want to block any part of it with speakers. For your info, there are already 6 speakers in the car which came by default, as it is the top-end Vista. 1 in each door and 2 tweeters on the dash. However, I think the bass can be better. So thought of adding 2 speakers on the parcel trey. Please suggest: 1) Feasibility: Whether its worth and/or possible. 2) Brand 3) Output 4) Type (oval, etc...)
	() Thanks