pre-out vs rec-out ...same thing or not?

roger2 · 27th July 2006, 04:59 AM

Could someone please comment on the differences between: (1)pre-out vs. (2) rec-out vs. (3) DAT rec-out ...for purposes of sending a signal to a powered subwoofer.

Are the signal levels approximately the same among these three different types of outputs? If so, are there other differences that I should be aware of?

Thanks!!!

TroelsM · 27th July 2006, 05:56 AM

Pre-out varies with the volume-setting and Rec-out doesn't.

Use Pre-out to feed the sub.

Regards TroelsM

janneman · 27th July 2006, 05:57 AM

Quote:

Originally posted by roger2
Could someone please comment on the differences between: (1)pre-out vs. (2) rec-out vs. (3) DAT rec-out ...for purposes of sending a signal to a powered subwoofer.

Are the signal levels approximately the same among these three different types of outputs? If so, are there other differences that I should be aware of?

Thanks!!!

Pre-out is generally variable by the volume control. The others normally are fixed in level (sometimes adjustable). The exact levels vary somewhat from equipment to equipment from less than a volt to several volts RMS. Best to check in the manual or try it out.

Jan Didden

AndrewT · 27th July 2006, 08:50 AM

Hi,
rec out is often at a higher source impedance.
You need to keep the recorder close to the amplifier.

roger2 · 27th July 2006, 08:54 PM

...makes sense now.

The reason I asked is that I have two integrated amps...only one of which has pre-outs...so that is the one I will use.

I am assuming it will be OK to use RCA "Y" to split the signal from the pre-outs. I need to feed the sub as well as the amplifier's main input.

Is using the "Y" the correct way to go here?

Thanks again....

richie00boy · 27th July 2006, 09:07 PM

That should be OK. If you can keep the amp one short as possible that would be better.

DigitalJunkie · 27th July 2006, 09:22 PM

Does the amp use those heavy wire jumpers from the "Pre-Out" to the "Main-in" jacks?

Some amplifiers (Like my Sansui AU-7900) use a switch to seperate the two "halves" of the amp.. You can leave the switch in the "connected" position,and just run RCA cables from the "Pre-Out" jacks to the sub or whatever,without needing to fiddle with Y-cables and whatnot.

I absolutely *love* the Pre-out/Main-in feature...I don't think I'll ever own/build another integrated amp without it!

roger2 · 27th July 2006, 09:57 PM

Yes it uses jumpers...no switch. It is an Akai AM-U55.

Thanks everyone for the advice!

27th July 2006, 04:59 AM	#1
roger2 diyAudio Member Join Date: Mar 2004	pre-out vs rec-out ...same thing or not? Could someone please comment on the differences between: (1)pre-out vs. (2) rec-out vs. (3) DAT rec-out ...for purposes of sending a signal to a powered subwoofer. Are the signal levels approximately the same among these three different types of outputs? If so, are there other differences that I should be aware of? Thanks!!!

27th July 2006, 05:56 AM	#2
TroelsM diyAudio Member Join Date: May 2003 Location: AARHUS. DK	Pre-out varies with the volume-setting and Rec-out doesn't. Use Pre-out to feed the sub. Regards TroelsM __________________ Need more time...

27th July 2006, 08:50 AM	#4
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	Hi, rec out is often at a higher source impedance. You need to keep the recorder close to the amplifier. __________________ regards Andrew T.

27th July 2006, 08:54 PM	#5
roger2 diyAudio Member Join Date: Mar 2004	OK ...makes sense now. The reason I asked is that I have two integrated amps...only one of which has pre-outs...so that is the one I will use. I am assuming it will be OK to use RCA "Y" to split the signal from the pre-outs. I need to feed the sub as well as the amplifier's main input. Is using the "Y" the correct way to go here? Thanks again....

27th July 2006, 09:07 PM	#6
richie00boy Did it Himself diyAudio Member Join Date: Nov 2003 Location: Gloucestershire, England, UK	That should be OK. If you can keep the amp one short as possible that would be better. __________________ www.readresearch.co.uk my website for UK diy audio people - designs, PCBs, kits and more


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27th July 2006, 09:22 PM	#7
DigitalJunkie diyAudio Member Join Date: Apr 2003 Location: Portland,Oregon Blog Entries: 4	Does the amp use those heavy wire jumpers from the "Pre-Out" to the "Main-in" jacks? Some amplifiers (Like my Sansui AU-7900) use a switch to seperate the two "halves" of the amp.. You can leave the switch in the "connected" position,and just run RCA cables from the "Pre-Out" jacks to the sub or whatever,without needing to fiddle with Y-cables and whatnot. I absolutely love the Pre-out/Main-in feature...I don't think I'll ever own/build another integrated amp without it!

27th July 2006, 09:57 PM	#8
roger2 diyAudio Member Join Date: Mar 2004	Yes it uses jumpers...no switch. It is an Akai AM-U55. Thanks everyone for the advice!

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