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KleanAkkord
08-30-2006, 09:51 PM
How will it work if I am running my front's off my RF T8004 and my rears off my HU? Will I lose my ability to fade since it is a 4 channel amp? I don't want to run them this way with no way to attenuate the rears.

Thanks in advance!

squeak9798
08-30-2006, 10:34 PM
You will still be able to fade. The fader affects both the internal amplifier and the RCA outputs.

KleanAkkord
08-30-2006, 10:37 PM
So if I fade it from the rear will it fade the right side as well?

squeak9798
08-30-2006, 10:38 PM
If you mean will the balance control still work as well....yes.

Fade controls the front and rear, balance controls the left side and right side.

KleanAkkord
08-30-2006, 10:49 PM
Maybe I should explain it better...

My two RCA outputs (front and rear) go to my 4 ch amp. The four channel amp will be hooked directly to my front comps (when i get them). Channel 1 and 2 to the left and Channel 3 and 4 to the right.

My concern is since my right channel for my front comps is ran off the rear RCA output on my HU is when I turn down the output from my rears it will also turn down the output to my right side comps in the front.

squeak9798
08-30-2006, 10:53 PM
Maybe I should explain it better...

My two RCA outputs (front and rear) go to my 4 ch amp. The four channel amp will be hooked directly to my front comps (when i get them). Channel 1 and 2 to the left and Channel 3 and 4 to the right.

My concern is since my right channel for my front comps is ran off the rear RCA output on my HU is when I turn down the output from my rears it will also turn down the output to my right side comps in the front.

Yes, you should have clarified that to begin with. My ESP hasn't been working so well here lately..... ;)


Yes, in that scenario when you fade to the rear, it will attenuate the right side of your setup, assuming that you are not using anything fancy like a "Pro Mode" that turns the rear outputs into midwoofer outputs and the rear outputs that you are using are exactly that...rear outputs.


Curious as to why you have your stereo set up like that? Are you running active or bi-amping?

What headunit do you have?

KleanAkkord
08-30-2006, 11:08 PM
My bad...I sensed the confusion:)

I haven't done it yet. I am picking up some comps soon and am trying to figure out the best way to wire it. My reasoning for doing it this way is to use my amp to power my front comps and hu to power the rears. I would end up biamping the comps because i don't want to bridge the channels to run them. What do you recommend?

Thanks for your assistance!

KleanAkkord
08-30-2006, 11:08 PM
My HU is the Kenwood XXV-001D

squeak9798
08-31-2006, 08:54 AM
Well, I'm not familiar with that HU and after searching briefly couldn't find the specs for it to know if it is capable of handling the xover duties for a fully active frontstage....but if you are wanting to utilize the passive xovers that came with the component set, I wouldn't bi-amp but rather bridge the amplifier down to 2 channels for your components.

etznova
08-31-2006, 09:26 AM
actually to make it easier get a y splitter fior your rca's and slpit the front signal to both channels on your amp then hook your rears up through the hu amp

that is what i did in my girklfriends car with the type x comps i got and the rears are faded out through the hu amp

KleanAkkord
08-31-2006, 09:17 PM
Here are the specs on the HU (crutchfield is good for something)...

Crossover (XOver):

Front High Pass Filter:

Center Frequency: 30Hz, 40Hz, 50Hz, 60Hz, 70Hz, 80Hz, 90Hz, 100Hz, 120Hz, 150Hz, 180 Hz, 220Hz, 250Hz, or Through (no filter)

Slope: 12dB/Oct, 18dB/Oct, or 24dB/Oct

Rear High Pass Filter:

Center Frequency: 30Hz, 40Hz, 50Hz, 60Hz, 70Hz, 80Hz, 90Hz, 100Hz, 120Hz, 150Hz, 180 Hz, 220Hz, 250Hz, or Through (no filter)

Slope: 12dB/Oct, 18dB/Oct, or 24dB/Oct

Subwoofer Low Pass Filter: (adjustable when Subwoofer is "On")

Center Frequency: 30Hz, 40Hz, 50Hz, 60Hz, 70Hz, 80Hz, 90Hz, 100Hz, 120Hz, 150Hz, 180 Hz, 220Hz, 250Hz, or Through (no filter)

Slope: 12dB/Oct, 18dB/Oct, or 24dB/Oct

Will this work for a active set up?

etznova - I didn't even think of that.

cyantist
08-31-2006, 09:25 PM
actually to make it easier get a y splitter fior your rca's and slpit the front signal to both channels on your amp then hook your rears up through the hu amp

that is what i did in my girklfriends car with the type x comps i got and the rears are faded out through the hu amp
Do this..

heyman421
08-31-2006, 09:30 PM
keep in mind you wont be getting the full potential output voltage, since it's being split to the internal amplifier, and the unit will run a lot hotter with the internal amp on as well

i say ditch the rears, and get the 5v you paid for

KleanAkkord
08-31-2006, 10:30 PM
Another good point.

I guess i don't really need rears all that much. The only ones that ride in my back seat are my kids...but I would like to keep them if possible.

Any other suggestions?

heyman421
08-31-2006, 10:33 PM
i don't know what i was thinking.. you can turn the internal amp on and off, so you could turn them on when you have passengers, and then off, to get the 5v to your amp, for solo-travel :)

KleanAkkord
08-31-2006, 10:58 PM
Ok, I did a little research. I found out the the amp has a 2/4 input switch so I can set the input to 2 and just use the front RCA inputs. Does this sound like it would work without compromising the systems performance?

How much SQ am I going to loose by running the amp off the HU? Noticeable?

That is a good idea heyman!