8-volt pre-outs on an older amp?
Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=57412
Printed Date: May 02, 2024 at 10:08 PM
Topic: 8-volt pre-outs on an older amp?
Posted By: PigGuy
Subject: 8-volt pre-outs on an older amp?
Date Posted: June 10, 2005 at 12:29 AM
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?
Replies:
Posted By: dwarren
Date Posted: June 10, 2005 at 1:14 AM
It won't necessarily hurt anything but you will not be able to adjust your gains properly. -------------
Posted By: haemphyst
Date Posted: June 10, 2005 at 9:18 AM
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."
Posted By: Alpine Guy
Date Posted: June 10, 2005 at 10:31 AM
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.
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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.
Posted By: PigGuy
Date Posted: June 10, 2005 at 1:42 PM
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.
Posted By: Alpine Guy
Date Posted: June 10, 2005 at 11:45 PM
i wouldn't let that pass by....thats cheap!
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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.
Posted By: KarTuneMan
Date Posted: June 11, 2005 at 1:08 AM
Buy it....
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Posted By: Darin d.
Date Posted: June 11, 2005 at 2:22 AM
buy hu NOW suffer with what you have till you can afford another amp that can handle the preout more respectfully.
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darin
Posted By: customsuburb
Date Posted: June 11, 2005 at 10:59 AM
You could try using a RCA level attenuator to reduce the voltage coming from teh head unit. https://peripheralelectronics.com/2002/signal_path.asp
Posted By: DYohn
Date Posted: June 11, 2005 at 11:08 AM
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. ------------- Support the12volt.com
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