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AP1 Sound System problems

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Old Nov 13, 2006 | 03:46 PM
  #11  
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the pioneer sub is 4 ohm single voice coil
350w to 400 w RMS
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Old Nov 13, 2006 | 03:57 PM
  #12  
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http://www.crutchfieldadvisor.com/learning...&impedance=SVC4

this is how your sub is wired, generating 4 ohms of resistance.


2 ohms bridged on your amplifier will not work with a single voice coil 4 ohm subbie. You need to match up to 4 ohms by adding another sub

http://www.crutchfieldadvisor.com/learning...&impedance=SVC4
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Old Nov 13, 2006 | 04:41 PM
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so i only put it on one channel?
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Old Nov 13, 2006 | 05:08 PM
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ok, that could be a solution.

whats your amplifier model? post it up and i'll check the power ratings etc.
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Old Nov 13, 2006 | 05:51 PM
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Schneider SPA-9704A
Can you help me figureout the best way to set up my system as well as if i need to change my amp as well ??
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Old Nov 13, 2006 | 06:06 PM
  #16  
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haha ok heres the specs.

4 channel amp.

Class A/B amplifier.

65W RMS x4 @ 4ohms - running 4 channels at 4 ohms
90w RMS x4 @ 2ohms - running 4 channels at 2 ohms
watts rms @ 1 ohm - unstable/will not work'

RMS power @4 ohms MONO 130W RMS.

Is there a setting to change the amp into MONO mode? Check up the manual. There may also be a special way to hook it up to the amp, you may not even use the 4 channel speaker terminals on the amp, there may be another two speaker wire terminals marked MONO.

When you do this, change the mode of the amplifier from HP (high pass) to LP (low pass). Set it around 80hz and tune from there.

even if you can, 130W rms is jack shit bass. This is a class A/B amplifier. For subwoofers, you should really get a CLASS D monoblock amplifier which is suited to powering subwoofers, and the added plus of the class D is that they do not heat up as much as a class A/B amp. But connect it up anyway and see how you go you can always upgrade later. The amp that you have is really designed to run component splits/speakers however.

I guess you need to decide how many subs you are going to have. 4 ohm voice coil is really a ineffective sub, because the higher the ohm resistance, the more power that you need from the amplifier. Get yourself a soundstream subwoofer, they have dual 1ohm voice coils. Each time your ohm rating doubles, the efficiency is halved, e.g 100 W @ 4 ohms, but 2 Ohms is 200W, 1 ohm is 400W and so on. but when you do this, you also need to make sure that you get an amp that can run stable at 1 ohm.

Depends how much cash you want to put into it, with your current subwoofer, you could get a pioneer or sony class D monoblock that would push out say 200-350W RMS. However the THD (total harmonic distortion) is high on these units, around 1%. Really any good SQ amplifier will have a THD of .02%, and a higher signal to noise ratio. Once you start chasing more than about 500W rms its time to start looking at some different brands, i.e soundstream, alpine etc.
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Old Nov 13, 2006 | 06:10 PM
  #17  
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there is jack shit about that amp apart from the specs on the net, no pics.


perhaps if you take a picture of teh side of the amps which have any sort of buttons/terminals on them. we can then see what inputs it has and how to go about hooking it up.
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Old Nov 13, 2006 | 06:12 PM
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hmmz
my amp doesnt have a mono switch to it
there is high pass and low pass filter on it
does that basically mean i cannnot use the amp no more?
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Old Nov 13, 2006 | 06:12 PM
  #19  
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hang on......

on the same amp you are running

splits - using two channels

and you want to use the other two channels to power your sub?

in this scenario you may only be able to use one channel, meaning you will get 65W RMS. not even worth wasting your time connecting but you could try never the less.


the smartest way to do it would be to

buy a monoblock amp just for running the sub.

retain your schneider amp with four channels. keep using the two channels for your splits and maybe get some 5 inch speakers and mount these behind the seats if you wanted some extra sound.
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Old Nov 13, 2006 | 06:27 PM
  #20  
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do i need to run new wiring to install the monoblock?
how much RMS needed on the mono block?
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