Car subs for home use

Vivekphadnis · 1st April 2006, 13:59

Sam, I can't find the 1202 and 1204 sub parameters. Could you also tell me how much they cost?

By the way, I got the number of the person who sells peerless india drivers in Mumbai. But the problem is, as Navin said, getting it to Bangalore. And I also have to check them before buying them. I cannot do that.

Sam Kapasi · 1st April 2006, 15:44

Quote:

Originally Posted by Vivekphadnis

Sam, I can't find the 1202 and 1204 sub parameters. Could you also tell me how much they cost?

By the way, I got the number of the person who sells peerless india drivers in Mumbai. But the problem is, as Navin said, getting it to Bangalore. And I also have to check them before buying them. I cannot do that.

here you go

1202 is a dual voice coil sub, there is no sub-driver called 1204.

Vivekphadnis · 1st April 2006, 22:47

Thanks Sam.

Qts=0.44. Cms=242. Bl=7.71. Xmax=12.5mm. What say?

navin · 2nd April 2006, 01:23

Fs 24
Vas 100
geez this thing can go low if put in a large box.

I would recommend the aperiodic box about 2cu. ft for this.

at 2 cu. ft. Qts will jump to 1+ so using a aperiodic vent you can bring the Qts down to a more manageable 0.8 or so.

BTW this is back of the head calculations. use Box Model or Box Plot or Perfect Box for a more accurate box.

Vivekphadnis · 2nd April 2006, 14:31

Sam, I have another big favour to ask you. Could you let me have the TS parameters for GT4-10 and GT4-12 too. I want to have a look at their figures too.

Do you guys think something like two 10 inchers would beat the daylights out of my neighbours? Or should I stick to just one driver?

navin · 3rd April 2006, 10:46

advantages of using 2 10 v/s 1 15" (similar to advantages of using 2 8" over 1 12")

15": lower Fs, higher Xmax and so usually a 15" moves more air than 2 10", huge Vas - in most cases 2 10" will need a smaller box than 1 15.

10": Smaller Mms and higher BL/Mms ratio which means that the bass can be made quite tight. With a 15" you would get some bloom. Then again I have used 18" with little bloom.

unless we know the specs of saythe GT4-10 vs the GT4-15 we cant accurately make a decision on this.

Vivekphadnis · 3rd April 2006, 13:09

Navin, do you remember Arasu from diyaudio.com. I had totally forgotten that he makes drivers apparently of fairly good quality. Do you have any info on that?

Bass&Trouble · 3rd April 2006, 13:54

Quote:

Originally Posted by navin

With a 15" you would get some bloom. Then again I have used 18" with little bloom.

I am sure you mean 'boom'. Unless the subs in question are actually flowering.

navin · 3rd April 2006, 13:54

I do. Is he not the guy from Calcutta?

Vivekphadnis · 3rd April 2006, 23:28

No. Arasu is the Bangalore guy. He has one 12 inch sub. Vas=156L. P=100W. Xmax=8mm. Qts=0.45. Rubber surround. Paper cone I think but not sure. About 2K. The Vas is really high, don't you think?

navin · 4th April 2006, 10:16

big Vas and rather high Qts means rather large selaed box.

Vivekphadnis · 4th April 2006, 12:16

So they are not worth trying? I am okay with a big box but not too huge.

navin · 4th April 2006, 14:04

I would look at a box between 40-80 liters. I know this is a huge range but I think 40 liters might just work in your car.

Sam Kapasi · 4th April 2006, 22:17

Quote:

Originally Posted by navin

I would look at a box between 40-80 liters. I know this is a huge range but I think 40 liters might just work in your car.

Navin!! He wants to use it in his home!!

Vivekphadnis · 4th April 2006, 23:56

Fresh problems. Arasu does not have 10 or 12 inch drivers in stock. Only 8 inch ones. They are rubber surround sandwich cone. 40W, Xmax=4mm. fs=28Hz. Qts is around 0.4 or something. Now what?

1st April 2006, 13:59	#46
Vivekphadnis BHPian Join Date: Jun 2005 Location: Bangalore Posts: 690 Thanked: 2 Times	Sam, I can't find the 1202 and 1204 sub parameters. Could you also tell me how much they cost? By the way, I got the number of the person who sells peerless india drivers in Mumbai. But the problem is, as Navin said, getting it to Bangalore. And I also have to check them before buying them. I cannot do that.
	() Thanks

1st April 2006, 22:47	#48
Vivekphadnis BHPian Join Date: Jun 2005 Location: Bangalore Posts: 690 Thanked: 2 Times	Thanks Sam. Qts=0.44. Cms=242. Bl=7.71. Xmax=12.5mm. What say? Last edited by Vivekphadnis : 1st April 2006 at 22:48.
	() Thanks

2nd April 2006, 01:23	#49
navin Team-BHP Support Join Date: Mar 2004 Location: Mumbai Posts: 25,421 Thanked: 9,997 Times	Fs 24 Vas 100 geez this thing can go low if put in a large box. I would recommend the aperiodic box about 2cu. ft for this. at 2 cu. ft. Qts will jump to 1+ so using a aperiodic vent you can bring the Qts down to a more manageable 0.8 or so. BTW this is back of the head calculations. use Box Model or Box Plot or Perfect Box for a more accurate box.
	() Thanks

2nd April 2006, 14:31	#50
Vivekphadnis BHPian Join Date: Jun 2005 Location: Bangalore Posts: 690 Thanked: 2 Times	Sam, I have another big favour to ask you. Could you let me have the TS parameters for GT4-10 and GT4-12 too. I want to have a look at their figures too. Do you guys think something like two 10 inchers would beat the daylights out of my neighbours? Or should I stick to just one driver?
	() Thanks

3rd April 2006, 10:46	#51
navin Team-BHP Support Join Date: Mar 2004 Location: Mumbai Posts: 25,421 Thanked: 9,997 Times	advantages of using 2 10 v/s 1 15" (similar to advantages of using 2 8" over 1 12") 15": lower Fs, higher Xmax and so usually a 15" moves more air than 2 10", huge Vas - in most cases 2 10" will need a smaller box than 1 15. 10": Smaller Mms and higher BL/Mms ratio which means that the bass can be made quite tight. With a 15" you would get some bloom. Then again I have used 18" with little bloom. unless we know the specs of saythe GT4-10 vs the GT4-15 we cant accurately make a decision on this.
	() Thanks

3rd April 2006, 13:09	#52
Vivekphadnis BHPian Join Date: Jun 2005 Location: Bangalore Posts: 690 Thanked: 2 Times	Navin, do you remember Arasu from diyaudio.com. I had totally forgotten that he makes drivers apparently of fairly good quality. Do you have any info on that?
	() Thanks

3rd April 2006, 13:54	#54
navin Team-BHP Support Join Date: Mar 2004 Location: Mumbai Posts: 25,421 Thanked: 9,997 Times	I do. Is he not the guy from Calcutta?
	() Thanks

3rd April 2006, 23:28	#55
Vivekphadnis BHPian Join Date: Jun 2005 Location: Bangalore Posts: 690 Thanked: 2 Times	No. Arasu is the Bangalore guy. He has one 12 inch sub. Vas=156L. P=100W. Xmax=8mm. Qts=0.45. Rubber surround. Paper cone I think but not sure. About 2K. The Vas is really high, don't you think? Last edited by Vivekphadnis : 3rd April 2006 at 23:40.
	() Thanks

4th April 2006, 10:16	#56
navin Team-BHP Support Join Date: Mar 2004 Location: Mumbai Posts: 25,421 Thanked: 9,997 Times	big Vas and rather high Qts means rather large selaed box.
	() Thanks

4th April 2006, 12:16	#57
Vivekphadnis BHPian Join Date: Jun 2005 Location: Bangalore Posts: 690 Thanked: 2 Times	So they are not worth trying? I am okay with a big box but not too huge.
	() Thanks

4th April 2006, 14:04	#58
navin Team-BHP Support Join Date: Mar 2004 Location: Mumbai Posts: 25,421 Thanked: 9,997 Times	I would look at a box between 40-80 liters. I know this is a huge range but I think 40 liters might just work in your car.
	() Thanks

4th April 2006, 23:56	#60
Vivekphadnis BHPian Join Date: Jun 2005 Location: Bangalore Posts: 690 Thanked: 2 Times	Fresh problems. Arasu does not have 10 or 12 inch drivers in stock. Only 8 inch ones. They are rubber surround sandwich cone. 40W, Xmax=4mm. fs=28Hz. Qts is around 0.4 or something. Now what?
	() Thanks