Attenuating RCA Outputs
05-04-2007, 10:02 AM
#1
500 Watt CAFz'r
Thread Starter
Join Date: Oct 2004
Posts: 870
Attenuating RCA Outputs
Just did an Alpine IVA-D100 DVD deck, and you'd think for $1399 they'd have a high pass filter, but whatever!
Seems that when I get the volume up the deck's amp clips well before the sub output.
The gains are pinned on the sub amp, and still not enough.
So...thinking that a set of F-Mod high-pass filters between the deck and amp are in order, but I'd like to attenuate the front and rear outputs a bit as well.
Can I add a resistor to the RCA leads?
The deck's pre-out is 2.0V @ 10k.
Seems that when I get the volume up the deck's amp clips well before the sub output.
The gains are pinned on the sub amp, and still not enough.
So...thinking that a set of F-Mod high-pass filters between the deck and amp are in order, but I'd like to attenuate the front and rear outputs a bit as well.
Can I add a resistor to the RCA leads?
The deck's pre-out is 2.0V @ 10k.
05-04-2007, 12:56 PM
#2
500 Watt CAFz'r
Join Date: Mar 2005
Posts: 884
Originally Posted by Starterwiz
The gains are pinned on the sub amp, and still not enough.
So...thinking that a set of F-Mod high-pass filters between the deck and amp are in order, but I'd like to attenuate the front and rear outputs a bit as well.
Can I add a resistor to the RCA leads?
The deck's pre-out is 2.0V @ 10k.
So...thinking that a set of F-Mod high-pass filters between the deck and amp are in order, but I'd like to attenuate the front and rear outputs a bit as well.
Can I add a resistor to the RCA leads?
The deck's pre-out is 2.0V @ 10k.
05-04-2007, 04:17 PM
#4
500 Watt CAFz'r
Thread Starter
Join Date: Oct 2004
Posts: 870
I thought of that, but figured since the deck's amp is seperate anyways, it would be cheap and easy to drop the outputs a few dB. Too bad there's no gain control on it.
If we have to start spending, might as well buy the 5.1 processor.
If we have to start spending, might as well buy the 5.1 processor.
05-04-2007, 10:52 PM
#5
Uhm, a high-pass filter would do nothing to solve your problem. HPF filters out frequencies. It doesn't attenuate the overall signal.
What amp and sub are you running? Was the sub louder with your previous deck? If so, +1 for the line driver.
Another option would be to use an external amp for your main speakers instead of deck power. This would facilitate balancing the mains versus the sub, and would provide better overall SQ to boot.
What amp and sub are you running? Was the sub louder with your previous deck? If so, +1 for the line driver.
Another option would be to use an external amp for your main speakers instead of deck power. This would facilitate balancing the mains versus the sub, and would provide better overall SQ to boot.
05-05-2007, 01:17 PM
#6
500 Watt CAFz'r
Thread Starter
Join Date: Oct 2004
Posts: 870
Think I'll just try the F-mod first. The 18 watts of the deck should be fine if i get the lows out, and the F-mods cut the signal by 3dB, so should be OK.
Just a poor design IMO on the outputs from a consumer's point of view.
Certainly help to make the 5.1 processor sound worth the investment after tho. "It's SO much clearer now" lol.
That pulse feedback screen is kinda kewl. Wonder how they do that?
Just a poor design IMO on the outputs from a consumer's point of view.
Certainly help to make the 5.1 processor sound worth the investment after tho. "It's SO much clearer now" lol.
That pulse feedback screen is kinda kewl. Wonder how they do that?
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