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#1 (permalink) Old 07-24-2005, 11:26 PM
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What's a good subwoofer and amp combo for the E30? I have an Alpine head unit with subwoofer outputs.

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#2 (permalink) Old 07-24-2005, 11:33 PM
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i have two alpine type-r's with a poweractusik amp in my e36. it sounds really good. but im sure if you want to spend more money then there is of course better subs out there
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#3 (permalink) Old 07-25-2005, 01:00 AM
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Quote:
Originally posted by bimmer3214@Jul 25 2005, 12:33 AM
i have two alpine type-r's with a poweractusik amp in my e36. it sounds really good. but im sure if you want to spend more money then there is of course better subs out there
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Okay what size woofers and how much power is the amp pushing. The guys at Circuit City kept trying feed me crap about subs in E30's won't "sound good".

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#4 (permalink) Old 07-25-2005, 05:30 AM
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Quote:
Originally posted by Amazetbm+Jul 25 2005, 01:00 AM--><div class='quotetop'>QUOTE(Amazetbm @ Jul 25 2005, 01:00 AM)</div><div class='quotemain'><!--QuoteBegin-bimmer3214@Jul 25 2005, 12:33 AM
i have two alpine type-r's with a poweractusik amp in my e36.* it sounds really good.* but im sure if you want to spend more money then there is of course better subs out there
[snapback]364954[/snapback]
Okay what size woofers and how much power is the amp pushing. The guys at Circuit City kept trying feed me crap about subs in E30's won't "sound good".
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[/b][/quote]


I'm running a pair of audiobahn 12's and a class d mono block 1600 watt from the same maker. sounds....well. loud. it sounds good, bass hits hard and everything, but it's a tad bit on the "overkill" side for most people.
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#5 (permalink) Old 07-25-2005, 08:02 AM
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well i got tens because i have a convertible so i got limited space. but i also have an e36. my amp is a 2 channel 1000 watt. the subs are 200-750 rms i believe and 1500 max. i plan on getting a mono amp eventually. mine isnt insanelly loud but it does sound good. good amount of bass doesnt dround anything out
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#6 (permalink) Old 07-25-2005, 04:43 PM
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the 12's are in my '90 cabrio, I just removed the back seats(never used them anyway). The enclosure is a one off custom deal that also houses a pair of 6.5" audiobahn components that are being driven by a seperate amp. I hope to get some door builds constructed over the winter so I can add another set up front. The 12's don't drown anything out really, you just have to have good stout mid's and high's that can match up with them. The hardest part was to get the enclosure to fit everything I needed (two 12's, pair of 6.5's, dual amp rack on top, plus room for the capacitor) and have it still flow with the lines of the car. I have to take the entire set up out of the car one more time to finish it up and fiberglass it, but I'll post a few pics this fall.
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#7 (permalink) Old 07-25-2005, 04:56 PM
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that sounds wicked man. im going to learn how to fiber glass and custom make boxes in a couple weeks and then next summer im going to school for it
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#8 (permalink) Old 07-25-2005, 09:13 PM
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Thanks guys. I have some good direction now. You've been a great help.

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#9 (permalink) Old 07-25-2005, 09:14 PM
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#10 (permalink) Old 07-26-2005, 11:20 AM
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I had an E30 with a similar setup to the one pictured. The ski hatch is already there and just needs pushing out. This is a Rockford 10", my E30 had a Phoenix Gold 12" . The sub is mounted on MDF for extra rigidity. The sound is very deep and awsome. The 10" in the picture has now been replaced with a 15"
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#11 (permalink) Old 07-26-2005, 03:08 PM
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Quote:
Originally posted by PMB@Jul 26 2005, 11:20 AM
I had an E30 with a similar setup to the one pictured. The ski hatch is already there and just needs pushing out. This is a Rockford 10", my E30 had a Phoenix Gold 12" . The sub is mounted on MDF for extra rigidity. The sound is very deep and awsome. The 10" in the picture has now been replaced with a 15"
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Very nice set up! How big is your ski hatch? I don't think my ski hatch is that big. Is your Rockford sub free air sub? and how do you mount it? Do you have any more pictures of the installation and detail wiring?

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#12 (permalink) Old 07-26-2005, 03:44 PM
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Man if that rockford sub isn't designed for free-air applications, its only a matter of time before it gets blown.

Also - IF it isn't free-air, you aren't hearing HALF of the low frequencies that that thing is capable of.

I dont ever choose to use rockfords in my installs, though - so I dont even know if they make a freeair driver or not.

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#13 (permalink) Old 07-26-2005, 06:26 PM
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[attachmentid=23065]well i have a 12 inch audiobahn Abass it really goo for someone who is not looking for to much bass but this is still enough to rattle the trunck and let everyone know you gota system i had a 800 watt bazakoo amp but it was to much and blew the sub so my next step is custom box to fit my e30 with a 15" audiobahn eternal sub it has 1300 watt rms very loud not sure what to do for amp yet though.
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#14 (permalink) Old 07-26-2005, 06:33 PM
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I have two 12" Pioneers and 600 watt amp in my E36. I plan on upgrading to 2 12" JL W3v2 and an 800watt Phoenix Gold mono amp.

Choose your box wisely if you plan on a sealed enclosure. Ive tried a couple different boxes in my E36 with the same subs and they all sounded very different from each other.
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#15 (permalink) Old 07-27-2005, 03:55 AM
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Quote:
Originally posted by jeremer@Jul 26 2005, 08:08 PM
Very nice set up! How big is your ski hatch? I don't think my ski hatch is that big. Is your Rockford sub free air sub? and how do you mount it? Do you have any more pictures of the installation and detail wiring?
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The Ski hatch in the E30 is the same as the E46. As SpOrky said though, that specific sub is not designed for free air, it did work OK though. The 15 is a lot, lot better. Whe choosing a sub for free air you need to look at the Theil Small Parameters. In particular the VAS rating. VAS is the Volume of Air Space required to produce the lowest resonant frequency (also known as Free Air Resonance, or Fs) to it's ideal effect. Look for a sub with a very high VAS, 150-300 liters is ideal for this application. Using a sub like the Rockford 10 in a small box is a good compromise. But it basically uses harmonics to fool you into thinking that the bass is deeper than it is. Regardless of the sub, the bigger the box, the lower the resonant frequency. My 15 pushes out 20hz with ease.

With regard to blowing the sub, it is unlikely, espectially with the 15. As the sub feeds directly into the cabin, once the volume starts to rise your hair starts to move, you can feel the bass in you chest, well everywhere actually. The sound pressure becomes too much for your ears to take and you have to turn it down.

Wiring is simple. The amp signal is fed from a tap into the rear speakers. The battery is in the trunk, and a feed comes from the head unit (which is stock by the way).

A bigger picture is attached so you can see it better
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