Hello All,

I've run into budget limitations and have decided on a new approach. I have uninstalled my Sony MPX-CD70 and sold it on ebay. BTW, do not make the mistake of buying a Sony HU, get something nice, Alpine, Clarion, Eclipse.

It looks as though my eyes are bigger than my budget, I wanted an Alpine 9815, DJ Qube mod, and Compustar or siimilar alarm to guard it. Just looks to be too expensive. So I'm going with the following:

Stock HU (keeping it for theft/breakin considerations and keeping the stock controls w/o modification)

PPI PC275 (had this laying around in my garage decide to wire it up, sounds awesome just driving the fronts)

MB Quart Discus 6 1/2components in the front and my old reference MB Quart 5 1/4" comps in the rear.

I also have a RSX sub/amp.
My options are such as this:
The PPI will push 75 x 2 @ 4 ohms or 150 x 2 at 2 ohms, so if I wire the fronts and rears in parallel I have 4 nicely powered speakers, but no fader control. And with this option I can use the rear speaker outputs to send to the sub amplifier. Really need the fader control though as I don't want the rears as loud as the fronts. Is there anyway implement that with this configuration?

Only other thing I can think of is to have the rears direct powered by the HU and have the PPI amp only running the front speakers, then split the RCA cable such that it powers both my sub amp and my PPI front speaker amp.

Thanks guys, let me know what you think.

 

An "L" pad is what you're looking for (attenuation circuit)...

It's possible to do it with resistors such that the attenuation to the rears are fixed (probably $2 a side) but I'd go with an adjustable L pad (probably about $15 a side) just so you could adjust it by ear.

 

And to answer your next question...

Shazam!

[edit] Oops! Out of stock

 

Looks perfect! Thanks guys.

Only problem is I put the stock HU in and the CD player doesn't work anymore. Radio works just fine, but when you put in a CD there's no sound. It seems to be spinning the disc and the forward and reverse buttons work, but there's just no sound.

I give up for tonight.

 

What did you not like about the Sony HU? I like mine. What problems have you had with it?

 

Mids and highs sound better on the stock head unit, generally cleaner more full sound from the stock HU than from the supposedly $400 retail sony. You can tell the mid output sucks as it begins to distort approching 2/3 volume, where bass output is already extremely distorted.

All in all I just don't like the way they sound. Listened to a number of other car's systems lately from stock to cheap alpine HU's and they all blew mine away when i had the Sony.

A good test is take the same CD and listen to it with the sony, then listen to it with one of the better decks in another car. I was amazed how non-linear the frequency response was of the Sony when I tried this. There are a number of sounds it just doesn't pick up correctly.

 

Were you running an external amp, or just the HU?

I have mine on an external MTX amp, and that may be the differance.

 

I figured it out, Yes I am using an external amp. I hooked up the remote lead of the amplifier to the Antenae Power/Amp Rem Relay lead on the HU, which is turned off when the radio is not on.

Got it all hooked up and it sounds really good. I actually need to lower the gain as it's really loud.