Preamp used in HT bypass - Signal degrade??


Is it a good idea to put a preamplifier between a Home Theater processor and your amplifiers?  Initially I thought it might be good to benefit from whatever the pre-amplifier may offer but if you got a very good processor it may be pointless and detrimental.

I tried it for a while and I think passing signal through a preamplifier tends to limit some detail.  It's like removing a restrictive conditioner from the power cord. Is this the case or am I imagining things? It may sound a lot clearer and open and including the preamplifier may not be a good thing.  So why does anybody use a bypass component it's just another piece of hardware along the signal chain?   Maybe it's a trade-off for the convenience.

 

 

emergingsoul

I use my preamp's bypass when watching movies. The bypass function allows my mono-amps to drive my front speakers and my 3-channel amplifier to drive my center and rears when watching movies. My preamp is used in my 2-channel, when I'm not watching movies. I don't get your comments, "So why does anybody use a bypass component it's just another piece of hardware along the signal chain?" Bypass simply allows the "main" amplifier to drive the front speakers and the processor to control the volume. 

I don't want my home theater components to be in the chain when listening to two-channel music.  The home theater gear is on a completely different level (lower).  I use a nice Onkyo receiver for surround processing, but I doubt running the front channels through my LTA MicroZotl preamp is going to degrade the sound quality.

My previous conrad-johnson preamp had a true pass through.  The LTA really just fixes the volume on the input that is designated as Home Theater.  I set the channel levels with the Onkyo.  Works well enough for me.  

My focus has to do with quality of the Signal path being interfered with when listening to home theater.  Use a conrad-johnson preamp and the bypass function still has the signal going through all those capacitors according to people at CJ, obviously impact some hardware  while passing-through and that's the question here

I can't edit my comments after I post because I can't find all my errors initially. Anybody else have this problem?

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I can't answer this question in the general sense, but I can in the specific.

Anyone can make a bad preamp with a bad HT bypass.  The question is, if your preamp is bad, why are you using it? If it's degrading the HT signal it's probably degrading everything else.

My experience with Parasound P7 and Luxman integrated is no, it's not the preamp that degrades HT sound so much as the quality of the HT signal to begin with.  If your HT preamp sounds noticeably better, get another stereo preamp, it's in the way.

Also worth noting, audiophiles tend to over-emphasize ANY change at all.  That is, a tiny change we spend weeks listening for somehow justified a $2,000 speaker cable. 

Worth keeping in mind any change you perceive and putting into the grand scheme of things.  If you weren't testing A/B would you even care about this difference?  Is the convenience of using a preamp with HT bypass not worth the degradation? It may be OK to ignore it and say "good enough."

All Video, The AVR is handling all channel's volume, including the Front Volume, i.e. more or less attenuation of the signal,

you do the initial setup with the AVR, ONCE, from the listening position (level adjusting front to center to rear to sub), and then you only alter the volume of them all together. Your AVR must have front pre-outs.

the HT Bypass is a PASSSIVE Input/Pass Thru, to the 'better' amp for the Front Speakers, thus it avoids other circuits in the preamp