Speaker and Amp help...........

Discuss all 1991-1999 BMW e36 Electronic & Lighting related issues here. Whether its a set of custom projector headlights with 4000k HIDs, yellow HID fogs, or just having some trouble getting your car to ignite, post up your questions and comments here.

Speaker and Amp help...........

Postby Dallasbimmer » Wed Oct 06, 2010 8:03 pm

Hey guys I have been wanting to change out my stock speakers for some Alpine's but wanted to know if I would have to change my factory amp for a new one?.......also what kind of amp is needed......cause I wanna make it all Alpine but I dont know what I need to make sure all the new speakers will work correctly.........
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Re: Speaker and Amp help...........

Postby tibbsa » Sun Nov 21, 2010 7:12 pm

which alpine speakers/
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1994 Maxima

Re: Speaker and Amp help...........

Postby DEFKON99 » Sun Nov 21, 2010 10:54 pm

depending upon the RMS and the OHms of the new speakers you should be cool. But if youre looing to upgrade for more power go aftermarket. Check the specs on the oldies you should be cool with the stock amp for the alpines.
Edge one looks like that stupid cube you buy to reset the brake pistons on doo doo cars -Proctor750

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Re: Speaker and Amp help...........

Postby projectXe36 » Mon Jul 11, 2011 3:30 am

Your factory amp should power most any aftermarket nicely, but if your going for REALLY high power output bypass the factory amp and run the speakers off the amp of your choice
95 325i Black on Black.. Bone Stock For Now...
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Re: Speaker and Amp help...........

Postby Archetype » Tue Nov 01, 2011 10:47 pm

The harmon kardon amp is garbage for audiophiles. I rewired my entire system, bypassed and took out the factory 'hifi' amp. The factory amp has a very high THD (total harmonic distortion) and was designed for the odd ohmed factory speakers. (3.5, 6.5 ohm etc.)
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Re: Speaker and Amp help...........

Postby e36-coupe » Thu Nov 03, 2011 10:26 am

im looking for an amp to power either one vibe space 12" sub (1000w rms) or two of them (2000w rms) :shock:

:roll: :shock:
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Re: Speaker and Amp help...........

Postby Archetype » Sun Nov 06, 2011 11:33 am

e36-coupe wrote:im looking for an amp to power either one vibe space 12" sub (1000w rms) or two of them (2000w rms) :shock:

:roll: :shock:

Single or dual voice coil? What ohm? If single 4 ohm, I would run one of these on it:
http://www.onlinecarstereo.com/CarAudio ... 4001D.aspx
If you add another 4ohm 12", just parallel them to drop it to 2 ohm, and you d still get 850 (probably not true rms) per sub, without worries of blowing either.

Your car will sound like a can with bees in it. If you are nt on a budget and want to push the subs to the max, get a Kicker ZX2500.1 and call it a day. You could run three on it if you wanted to.

It would crumble the pavement. Better invest in 50 plus feet of fatmat or dynamat though.
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Re: Speaker and Amp help...........

Postby e36-coupe » Sun Nov 06, 2011 11:40 am

There 2x2ohm dvc. But think im going with two 15" mutant subs. There single 4ojm vc so. Ill run them to 2 ohm.. Found a amp which is 1 x 1000w at 2ohm.. Just need to figure out if i want sealed or ported because ive only ever run sealed. My last mutant 15" sub came in a ported box. But sealed them up. And they souned much better! But finding a decent 2ohm stable 1000w amp is either hard because moat are rated at max and not rms. Or it dosnt show 2ohms. So buying s/h is the easiest way i think?
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Re: Speaker and Amp help...........

Postby Archetype » Sun Nov 06, 2011 11:47 am

Sealed for tighter bass from 120hertz down to the 40's - Ported for air movement and lows down to 25 - 30hertz. I have three 12 s in a V shaped sealed box. Tuned to 38 hertz.

If you get a 2000 watt mono block amp , turn it 1/4 of the way up and adjust the cross overs at 3/4 volume. You ll be a happy camper. Mono blocks are over rated. go for amps the are rated at twice as much (or just under) the power range you want to run in. Unless it is a j/l amp or kicker. They are beast, and close to true watt ratings.
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Re: Speaker and Amp help...........

Postby e36-coupe » Sun Nov 06, 2011 12:18 pm

What if i run ported but not have big ports. Say a 1" sloted port!?

Well the subs are 400w rms and 800max. If you can belive that then i dunno.

So if i find a 1000w rms amp that runs at 2ohms. Thia why i dont have to run the amp at full wack. But like you say if i grt a amp rated more. Then i can keep it for future builds.

Just need to see if 2.73 cuft box is enough for 2 15" subs.
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Re: Speaker and Amp help...........

Postby Archetype » Sun Nov 06, 2011 12:22 pm

Mutant Conquest 15 MTCON15

This model? I can help you with a proper build and box specs. But I need the model.
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Re: Speaker and Amp help...........

Postby e36-coupe » Sun Nov 06, 2011 1:33 pm

Mt1507x
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Re: Speaker and Amp help...........

Postby Archetype » Sun Nov 06, 2011 1:52 pm

15" sub woven effect
pp cone
120oz magnet structure
2.5" black alluminium voice coil
power: 400W RMS / 800W MAX / 1600W PEAK
frequency reponse: 26hz-1500hz
impedance: 4ohms sensitivity: 90dB
mounting depth: 172mm

Those are the only specs I could find. They have a sealed cubic foot volume or ported cubic foot volume, (dimension of the INSIDE of the box after accounting for the displacement of the woofer its self). It takes a way a bit of air space too.
Sealed enclosures are the smallest, and a standard 15" needs 1.2 - 1.5 of cubic foot volume to be tuned right. A ported enclosure needs more space, from 1.5 up to 2.5 or more in some cases.

2.73 cuft box is just right for 2 12's. 2 15's in a ported box that is 2.73... not a chance in hell. :P
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Re: Speaker and Amp help...........

Postby e36-coupe » Sun Nov 06, 2011 1:55 pm

This is the specs
Image

And what i quickly drew up for a ported sub

Image

Ignore these messurements as my space now is a little smallrt.

Any way ive worked it out so i have 3cuft sealed. And going to run them in the same space.
Now i dont know if this will be the wrong way to do it. But there be wired in parallel so both will recive the same signal.

If i run enclosed it will have bracing in the middle and the both sides.

Just looking for decent stuff to line the insides. Or should i leave it bare inside?
Last edited by e36-coupe on Sun Nov 06, 2011 1:59 pm, edited 1 time in total.
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Re: Speaker and Amp help...........

Postby e36-coupe » Sun Nov 06, 2011 1:58 pm

Reply to post above mine.

Im going to play with depth to get 3cuft. So 2 15's in a 3cuft should be good? If you say they both need 1.2 to 1.5. Just need to find its own cuft displacement. I do have a broken one here that i could take messurements from?
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