8-volt pre-outs on an older amp?

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PigGuy

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Joined: April 18, 2005

Location: United States

Posted: June 10, 2005 at 12:29 AM / IP Logged

I have an older Rockford Fosgate amp, before they sucked, and I think it's only rated for 2V RCA input.

I'm looking at a headunit that only has 8V pre-outs. Is it possible to turn down the voltage at the headunit so I don't hurt the amp, or is hurting the amp unlikely anyway?

dwarren

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Posted: June 10, 2005 at 1:14 AM / IP Logged

It won't necessarily hurt anything but you will not be able to adjust your gains properly.

haemphyst

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Joined: January 19, 2003

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Posted: June 10, 2005 at 9:18 AM / IP Logged

It WILL NOT hurt anything. When dealing with this kind of output, though, it becomes absolutely critical that you ubnderstand what you are doing while setting your gains. Start Here... Read it, Know it, Live it.

It all reminds me of something that Molière once said to Guy de Maupassant at a café in Vienna: "That's nice. You should write it down."

Alpine Guy

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Joined: October 18, 2003

Location: Canada

Posted: June 10, 2005 at 10:31 AM / IP Logged

basically your only setting for gain on the amp safely reccomended will be all the way down. You may have to adjust very slightly depending on how accurate the 8 volt pre out claim is.

2003 Chevy Avalanche,Eclipse CD7000,Morel Elate 5,Adire Extremis,Alpine PDX-4.150, 15" TC-3000, 2 Alpine PDX-1.1000, 470Amp HO Alt.

PigGuy

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Joined: April 18, 2005

Location: United States

Posted: June 10, 2005 at 1:42 PM / IP Logged

Thank you all. Though, there was a hidden hope that the killer-deal headunit wouldn't work, because even though it is a good deal, it's way beyond my budget.

But then again... how else would credit card companies be so profitable?

It's an Eclipse CD8053 for $275, with pre-outs only, no amplifier.

Alpine Guy

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Posted: June 10, 2005 at 11:45 PM / IP Logged

i wouldn't let that pass by....thats cheap!

2003 Chevy Avalanche,Eclipse CD7000,Morel Elate 5,Adire Extremis,Alpine PDX-4.150, 15" TC-3000, 2 Alpine PDX-1.1000, 470Amp HO Alt.

KarTuneMan

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Posted: June 11, 2005 at 1:08 AM / IP Logged

Buy it....

Darin d.

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Joined: May 11, 2005

Location: Canada

Posted: June 11, 2005 at 2:22 AM / IP Logged

buy hu NOW suffer with what you have till you can afford another amp that can handle the preout more respectfully.

darin

customsuburb

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Joined: January 17, 2004

Location: United States

Posted: June 11, 2005 at 10:59 AM / IP Logged

You could try using a RCA level attenuator to reduce the voltage coming from teh head unit. http://peripheralelectronics.com/2002/signal_path.asp

DYohn

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Location: Arizona, United States

Posted: June 11, 2005 at 11:08 AM / IP Logged

Using high voltage pre-amps with older amplifiers can cause unstable operation in the amp. I've seen systems where is worked just fine as long as the volume was all the way down, but as soon as it is turned up two or three notches the amp is driven into clipping. Sort of like an on-off switch with two volume settings: soft and dangerous to the speakers. The level attentuator suggestion is a good one, although that will damage the excellent SQ from your head unit. I suggest a new amp.

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8-volt pre-outs on an older amp?

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