Replacing the 8" subs?

d_dot · 10-24-2009, 06:57 AM

Quote:

Originally Posted by powertrip

Damn you guys...I keep running into threads like this and deciding to buy more stuff

. Bump for an answer on the 2 ohm vs 4 ohm question.

yeaaaa!

quality_sound · 10-26-2009, 05:06 AM

Quote:

Originally Posted by d_dot

2 or 4 ohm replacements?

It depends on if you're using the OEM amp or aftermarket and if using OEM if it's the standard or upgraded audio.

d_dot · 10-26-2009, 09:34 PM

Quote:

Originally Posted by quality_sound

It depends on if you're using the OEM amp or aftermarket and if using OEM if it's the standard or upgraded audio.

i want to use an aftermarket amp and i currently have the premium sound system. so 2 or 4 ohm for the sub replacement?

quality_sound · 10-27-2009, 02:14 AM

Again, it depends on the amp. If it's a 2-channel amp then most likely you'd want 2 Ohm subs. it would get you more average power than 4 Ohm subs but the 4 Ohm subs would have more dynamics. If it's a mono, or single channel, sub amp then it will depend on how low a load the amp is stable to. if it'll do 1 Ohm then you want 2 Ohm subs in parallel. If it's only stable to 2 Ohms then you want the 4 Ohm subs in parallel.

Basically, I need to know what amp you are looking at.

d_dot · 10-27-2009, 06:09 AM

Quote:

Originally Posted by quality_sound

Again, it depends on the amp. If it's a 2-channel amp then most likely you'd want 2 Ohm subs. it would get you more average power than 4 Ohm subs but the 4 Ohm subs would have more dynamics. If it's a mono, or single channel, sub amp then it will depend on how low a load the amp is stable to. if it'll do 1 Ohm then you want 2 Ohm subs in parallel. If it's only stable to 2 Ohms then you want the 4 Ohm subs in parallel.

Basically, I need to know what amp you are looking at.

im thinking about the Alpine PDX-2.150 because its low profile with the earthquake sws-8

quality_sound · 10-27-2009, 10:26 AM

Why not the 1.600 or 1.1000? same chassis but MUCH more power. You'd have to run the 8s as true subs and not midbasses but that sounds like your plan anyway. If you want to keep it stereo then I'd do a bridged 4.150 with the 4 ohm subs. Then you can either run more power to the fronts and the subs or you could birdge it just to the subs.

Are you happy with the overall volume now and just looking for more bass?

d_dot · 10-27-2009, 12:46 PM

Quote:

Originally Posted by quality_sound

Are you happy with the overall volume now and just looking for more bass?

precisely. i just need more of a punch and a lil bit of lows for the base. so which setup shud i go with?

immiketoo · 10-27-2009, 03:10 PM

+1 on this whole thread. If anyone could post a parts/equipment list and a DIY, I would be very greatful. Panda, if you do your set up, could we meet so I can hear it?

Green///Hell · 10-27-2009, 03:23 PM

Yeah, I think I am going to do this for sure, right after the SC install.
So if I use the Rockford Fosgate, should I stick with the 2ohm? I think its 2 channel and I keep looking around and can only find the 4ohm subs now

KonigsTiger · 10-27-2009, 03:29 PM

Quote:

Originally Posted by Technic

It will be a slight improvement if the OEM amp is retained, and only in the non-Premium system. The Premium woofers cannot be replaced with the SWS-8 and be driven by the OEM amp as the OEM woofers are 7 ohms. Running the SWS-8 with the Premium system will overheat and damage in the long run the OEM amp.

The biggest improvement is with a 2-channel aftermarket amp of some 150W RMS per channel, regardless of system.

Regardless of system meaning leave the same stock premium woofers and stereo but change to a high quality amp? Say to a Rockford Fosgate 200 watt amp?

badfish · 10-27-2009, 03:59 PM

Quote:

Originally Posted by Panda///Monic

And why buy SWS8 2 ohm over the 4ohm any difference??

See my first post in this thread back in April, 2008. I spoke directly with one of the engineers before the 2 ohm version came out and he gave me the scoop. The skinny is that the sub was designed to drop into the original box and use the OEM amp while being more efficient.

I have not verified that it will just drop in without a spacer and I don't think that is the case. But the engineer was very clear with me that they felt the 2 ohm load was OK for the OEM amp to handle. With sufficient stability, the lower impedance will squeeze some more power and ultimately provide more output.

If I were upgrading, what I would do is buy the 2 ohm sub and try it on the OEM amp. If not satisified with the output, 2 ohm subs are extremely flexible. You can run it stereo to maximize output of 2 ohm stable amps. You can run it parallel mono 1 ohm so you can use those powerful and efficient class D amps. You can wire it 4 ohm series mono which can make use of bridged channels on a 2 ohm stereo/4 ohm mono stable amp. 2 ohm, IMO, is the way to go...

quality_sound · 10-27-2009, 04:10 PM

Quote:

Originally Posted by d_dot

precisely. i just need more of a punch and a lil bit of lows for the base. so which setup shud i go with?

I'd still do the 4.150 bridged to the 4 ohm subs. Simply because it's more power and more flexible when you decide to expand later. And IME, you will want to upgrade later.

quality_sound · 10-27-2009, 04:12 PM

Quote:

Originally Posted by KonigsTiger

Regardless of system meaning leave the same stock premium woofers and stereo but change to a high quality amp? Say to a Rockford Fosgate 200 watt amp?

No, in either case you'd be replacing the woofers.

Technic · 10-27-2009, 10:18 PM

Quote:

Originally Posted by badfish

See my first post in this thread back in April, 2008. I spoke directly with one of the engineers before the 2 ohm version came out and he gave me the scoop. The skinny is that the sub was designed to drop into the original box and use the OEM amp while being more efficient.

I have not verified that it will just drop in without a spacer and I don't think that is the case. But the engineer was very clear with me that they felt the 2 ohm load was OK for the OEM amp to handle. With sufficient stability, the lower impedance will squeeze some more power and ultimately provide more output.

If I were upgrading, what I would do is buy the 2 ohm sub and try it on the OEM amp. If not satisified with the output, 2 ohm subs are extremely flexible. You can run it stereo to maximize output of 2 ohm stable amps. You can run it parallel mono 1 ohm so you can use those powerful and efficient class D amps. You can wire it 4 ohm series mono which can make use of bridged channels on a 2 ohm stereo/4 ohm mono stable amp. 2 ohm, IMO, is the way to go...

Note: this recommendation only applies to the standard, HiFi OEM system. No SWS-8 cannot be driven by the optional Premium Enhanced Audio OEM amp system.

Technic · 10-27-2009, 10:19 PM

Quote:

Originally Posted by KonigsTiger

Regardless of system meaning leave the same stock premium woofers and stereo but change to a high quality amp? Say to a Rockford Fosgate 200 watt amp?

No, replace the OEM woofers with a pair of SWS-8 and add a dedicated stereo amp just to drive the SWS-8.

doba_s · 10-27-2009, 10:30 PM

so, what is the verdict ? 2 ohm or 4 ohm ?

badfish · 10-27-2009, 11:22 PM

Quote:

Originally Posted by Technic

Note: this recommendation only applies to the standard, HiFi OEM system. No SWS-8 cannot be driven by the optional Premium Enhanced Audio OEM amp system.

I know the impedance is less than half the original sub. But has anyone actually tried? Just curious...

Quote:

Originally Posted by doba_s

so, what is the verdict ? 2 ohm or 4 ohm ?

The verdict is 2 ohm AFAIC. With Technic's warning, you cannot use the OEM amp on Premium sound systems so you must get an aftermarket amp. With non-premium, you can get more power using a 2 ohm sub. If you go aftermarket, you still have a variety wiring configurations as a 2 ohm pair is flexible for almost any amp.

frankzlin79 · 10-27-2009, 11:51 PM

Not my car, but something I found.

If our car needs two 8" subs, is the Rockford P300.2 going to be sufficient? This amp can deliver 150 w x 2 channels at 2 ohms.
http://www.rockfordfosgate.com/produ...0&locale=en_us

Where can I buy the 2 ohm, 8", SWS sub?
Update: http://www.audioonesavings.com/product/view/109

It appears that the 2 ohm model is: SWS 8XI.

KonigsTiger · 10-28-2009, 12:17 AM

Quote:

Originally Posted by quality_sound

No, in either case you'd be replacing the woofers.

What do you suggest the subs should be and what amp? Brand and all if possible. Thanks for the info.

roller · 10-28-2009, 12:30 AM

I hope the guy who made that video just has a bad mic. That does not sound clean at all.

frankzlin79 · 10-28-2009, 12:50 AM

I'm sure it is a bad mic. Because he had the car volume up pretty loud, the sub will definitely distort any inferior microphone found on digital cameras.

For those who have the SWS subs, with an after-market amp, please comment on the sound quality.

frankzlin79 · 10-28-2009, 12:54 AM

What is the frequency response of the SWS 8XI sub? Can it go down to 20 hz?

10-27-2009, 02:14 AM	#26
quality_sound 8 tracks of madness 62 Rep 2,735 Posts Drives: Slowly Join Date: Jun 2009 Location: At home iTrader: (1)	Again, it depends on the amp. If it's a 2-channel amp then most likely you'd want 2 Ohm subs. it would get you more average power than 4 Ohm subs but the 4 Ohm subs would have more dynamics. If it's a mono, or single channel, sub amp then it will depend on how low a load the amp is stable to. if it'll do 1 Ohm then you want 2 Ohm subs in parallel. If it's only stable to 2 Ohms then you want the 4 Ohm subs in parallel. Basically, I need to know what amp you are looking at.
	Appreciate 0 Quote

10-27-2009, 10:26 AM	#28
quality_sound 8 tracks of madness 62 Rep 2,735 Posts Drives: Slowly Join Date: Jun 2009 Location: At home iTrader: (1)	Why not the 1.600 or 1.1000? same chassis but MUCH more power. You'd have to run the 8s as true subs and not midbasses but that sounds like your plan anyway. If you want to keep it stereo then I'd do a bridged 4.150 with the 4 ohm subs. Then you can either run more power to the fronts and the subs or you could birdge it just to the subs. Are you happy with the overall volume now and just looking for more bass?
	Appreciate 0 Quote

10-27-2009, 03:23 PM	#31
Green///Hell Colonel 183 Rep 2,872 Posts Drives: 991 GT3, F15 X5, 1199S Join Date: Feb 2009 Location: Chicago iTrader: (5)	Yeah, I think I am going to do this for sure, right after the SC install. So if I use the Rockford Fosgate, should I stick with the 2ohm? I think its 2 channel and I keep looking around and can only find the 4ohm subs now
	Appreciate 0 Quote

10-27-2009, 10:30 PM	#38
doba_s Major General 405 Rep 6,107 Posts Drives: X7 l Cayenne l 997.2RS Join Date: Sep 2006 Location: Danville iTrader: (26)	so, what is the verdict ? 2 ohm or 4 ohm ?
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10-27-2009, 11:51 PM	#40
frankzlin79 Lieutenant Colonel 265 Rep 1,696 Posts Drives: 2018 M3 Join Date: Oct 2008 Location: Houston, Texas iTrader: (5)	Not my car, but something I found. If our car needs two 8" subs, is the Rockford P300.2 going to be sufficient? This amp can deliver 150 w x 2 channels at 2 ohms. http://www.rockfordfosgate.com/produ...0&locale=en_us Where can I buy the 2 ohm, 8", SWS sub? Update: http://www.audioonesavings.com/product/view/109 It appears that the 2 ohm model is: SWS 8XI. Last edited by frankzlin79; 10-28-2009 at 12:12 AM..
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10-28-2009, 12:30 AM	#42
roller Private First Class 10 Rep 164 Posts Drives: E92 Join Date: Jun 2009 Location: OC, CA iTrader: (0)	I hope the guy who made that video just has a bad mic. That does not sound clean at all.
	Appreciate 0 Quote

10-28-2009, 12:50 AM	#43
frankzlin79 Lieutenant Colonel 265 Rep 1,696 Posts Drives: 2018 M3 Join Date: Oct 2008 Location: Houston, Texas iTrader: (5)	I'm sure it is a bad mic. Because he had the car volume up pretty loud, the sub will definitely distort any inferior microphone found on digital cameras. For those who have the SWS subs, with an after-market amp, please comment on the sound quality.
	Appreciate 0 Quote

10-28-2009, 12:54 AM	#44
frankzlin79 Lieutenant Colonel 265 Rep 1,696 Posts Drives: 2018 M3 Join Date: Oct 2008 Location: Houston, Texas iTrader: (5)	What is the frequency response of the SWS 8XI sub? Can it go down to 20 hz?
	Appreciate 0 Quote