Deang Posted May 7, 2016 Share Posted May 7, 2016 http://www.manualslib.com/manual/405408/Yamaha-R-8.html?page=7#manual 1 Quote Link to comment Share on other sites More sharing options...
djk Posted May 7, 2016 Share Posted May 7, 2016 While not the best solution, I have used the headphone jack as a pre-out in this type of situation. Quote Link to comment Share on other sites More sharing options...
ricktate Posted May 7, 2016 Share Posted May 7, 2016 (edited) You take those jumpers out and you can use that receiver as pre amp. That is if yours has those jumpers on it. But you will not be able to use the amp on the receiver then. Edited May 7, 2016 by ricktate Quote Link to comment Share on other sites More sharing options...
Karsoncookie Posted May 7, 2016 Author Share Posted May 7, 2016 The manual says "prior to tone control" so that's no good. It seems to me djk's headphone jack is the way to go. Any comments on that please. Thank you all, Lars Quote Link to comment Share on other sites More sharing options...
The History Kid Posted May 7, 2016 Share Posted May 7, 2016 I'd agree that's not the best way to do it, and I'm not sure how it'd interact with the amp. I'm trying to look at it from two ways: A headphone jack is amplified to a certain degree, but I'm not sure how different it is from standard pre-outs. When you use pre-outs, they're going to an amplifier, something with power - whereas headphones are totally reliant on the receiver. Since headphones essentially are dependent on the pre-amplifier section of a unit, I can't see how they'd be THAT different from the pre-outs. That being said, it might be the best of your options, albeit a poor one. Quote Link to comment Share on other sites More sharing options...
Karsoncookie Posted May 7, 2016 Author Share Posted May 7, 2016 "poor option" only because so far we don't definitely know how headphone signal level compares to typical Preamp RCA outs. Isn't it just a question of- IF the headphone out level is suitable to feed the amp, how is it different than going RCA out ?? Some SQ reduction or loss I'm not aware of ? Lars Quote Link to comment Share on other sites More sharing options...
Coytee Posted May 7, 2016 Share Posted May 7, 2016 Accessory jacks are normally for things like graphic equalizers 1. Welcome back Dean 2. What he said My old Yamaha CR-2040 had if I recall, a circuit they called 'Adapter'. Might have been accessory....but it's been a long time. That was where the EQ & dbx & those goodies went. It was a signal that wasn't controlled by the volume control. Quote Link to comment Share on other sites More sharing options...
Karsoncookie Posted May 7, 2016 Author Share Posted May 7, 2016 Summarized question at this point - Will feeding an amplifier- from my receivers headphone jack- allow my receiver to properly function as a pre amp? May be posting while being answered. Lars Quote Link to comment Share on other sites More sharing options...
djk Posted May 7, 2016 Share Posted May 7, 2016 "Some SQ reduction or loss I'm not aware of ?" The headphone jack is the attenuated signal from the power amp (speaker) output. It is the proper level for driving a pro amplifier, I use a Sansui DB9090 in my shop to test out power amps after I repair them, it sounds quite good (although a real pre-out could be better). The fantastic sounding Yamaha A1 integrated amplifier (circa 1980) had it's pre-out connected this way (no power amp inputs). Most of the newer Yamaha home theater receivers with pre-out are also built this way. Quote Link to comment Share on other sites More sharing options...
Karsoncookie Posted May 8, 2016 Author Share Posted May 8, 2016 Ok. so I'm reading all I need is a 1/4" stereo plug to 2 RCA y splitter, plug and play, and my Yamaha R8 will act as a properly performing preamp to feed a Crown amp. Any other problem here to be aware of? I'm sure it may not compare to some 2K$ pre, but we will not be going there. Just substantiate me a bit more this will be ok please. Again, thank all, Lars Quote Link to comment Share on other sites More sharing options...
Karsoncookie Posted May 8, 2016 Author Share Posted May 8, 2016 OH, and if the above is OK, do I pull those jumpers thereby disabling the feed to the receivers integral amp ? (cause there will be no load on it)?? Lars Quote Link to comment Share on other sites More sharing options...
wvu80 Posted May 8, 2016 Share Posted May 8, 2016 (edited) Based on the comments I've read to this point Karson, it sounds like you are playing with fire. That receiver just wasn't designed to do what you are trying to do. I'm not sure what audio improvement you hope to gain by using the separate amp with the Yammie via headphone out, and it sounds like you have a lot to lose. I'm also thinking there is a difference between Line Out and Headphone out. Line Out is a constant, and I think Headphone Out changes depending on the manufacturer. I think they have that more standardized now than they did when receivers ruled the audio world. My final vote would be for you to use the receiver the way it was designed, and if you want to use the amp, find a separate pre-amp. Edited May 8, 2016 by wvu80 2 Quote Link to comment Share on other sites More sharing options...
Karsoncookie Posted May 8, 2016 Author Share Posted May 8, 2016 Based on the comments I've read to this point Karson, it sounds like you are playing with fire. That receiver just wasn't designed to do what you are trying to do. I'm not sure what audio improvement you hope to gain by using the separate amp with the Yammie, and it sounds like you have a lot to lose. My final vote would be for you to use the receiver the way it was designed, and if you want to use the amp, find a separate pre-amp. Thank you genuinely for your thoughts. I respect your posts.You know I mean that. The goal is to "budgetly"upgrade my amp (Power wise) without having to buy yet another component, a Pre So far it seems to be a valid method to use the headphone out to feed the (looking to yet purchase) amp. Specifically, the Crown K2 currently offered here. WVU - I think this is just a situation of thinking very slightly "out of the box" "Slightly", not very far. . The headphone jack is the attenuated signal from the power amp (speaker) output. It is the proper level for driving a pro amplifier, I use a Sansui DB9090 in my shop to test out power amps after I repair them, it sounds quite good (although a real pre-out could be better). That's what I'm thinking now, just asking for more concrete agreement, or non. Lars . 1 Quote Link to comment Share on other sites More sharing options...
mungkiman Posted May 8, 2016 Share Posted May 8, 2016 While not the best solution, I have used the headphone jack as a pre-out in this type of situation. A solution, either way. Quote Link to comment Share on other sites More sharing options...
Karsoncookie Posted May 8, 2016 Author Share Posted May 8, 2016 I'm just feeling - I had a very poorly chosen original topic title---I'm going to abandon this thread and relist as a new thread --- "?? Feed Amp from headphone jack of Receiver"??? in the "2 channel Home Audio" forum. Please follow if you can help. Lars 1 Quote Link to comment Share on other sites More sharing options...
jjptkd Posted May 8, 2016 Share Posted May 8, 2016 You can buy high level to low level adapters that you can hook up directly to the speaker outputs of you receiver to the rca inputs of your amplifier. Quote Link to comment Share on other sites More sharing options...
jjptkd Posted May 8, 2016 Share Posted May 8, 2016 Here's one on eBay for $6.50 shipped to your door. It even has level adjustments for mis-matched components: http://www.ebay.com/itm/PYRAMID-NS-60-high-to-Low-Level-Impedance-Adapter-/252375979041?hash=item3ac2c7d421:g:71oAAOSw3mpXJ3Jy&vxp=mtr 1 Quote Link to comment Share on other sites More sharing options...
Karsoncookie Posted May 8, 2016 Author Share Posted May 8, 2016 Very interesting. Thank you, Lars Lets all move to the other thread please. Quote Link to comment Share on other sites More sharing options...
Karsoncookie Posted May 8, 2016 Author Share Posted May 8, 2016 Never heard of the above. Thank you again jipktd. Lars Quote Link to comment Share on other sites More sharing options...
bobdog Posted May 8, 2016 Share Posted May 8, 2016 Please refer to your owner's manual. Accessory jacks are normally for things like graphic equalizers - not amplifiers. Those jacks are labeled "pre-out". Consumer and commercial gear does not play well together. This relates to gain structure. In some cases you may be right. But my pro gear has a great relationship with my consumer stuff. Quote Link to comment Share on other sites More sharing options...
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