2. amps-preamps
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Eliminated my preamp with amazing results

I pulled my preamp out completely. The result's were not subtle. 

For those who stream music only... I was going from my laptop... to my DAC...to my preamp...to my amp. My preamps ONLY function was volume control. Source control not needed.

I started using Audirvana recently which comes with it's own high quality 64 bit volume control that was far better than the potentiometer in my preamp. It dawned on me that I could control volume using Audirvana and plug my DAC directly into the amp and bypass the preamp altogether. (Roon and Jriver also have excellent volume controllers) Note: Audirvana has an app download on a tablet/phone so it acts like a remote control. I'm loving it!

This not only eliminated the preamps volume control but it took out ALL the electronics associated in a preamp including some cables. A FAR more direct route. However, you must use caution and make sure the volume is controlled properly in the software since the amp will be fed wide open volume.

Having experimented with 'passive' preamps in the past (McCormack TLC-1) I thought the sound would possibly lose dynamics and bass response would suffer. WRONG!

The results were...Shocking!! Immediately the extended depth of the image was noticeably deeper. Background darker. The highs are the best I've ever heard. Pristine. The bass was dynamic, tight and most of all 'textured' in a way I never heard before. As I stated earlier the results are NOT subtle! 

This is an experiment that took a few minutes to set up and yielded the best performance improvement of ANY other tweak I've ever tried. Not anything like using a passive preamp.

Equipment used...  Peachtree DAC-itx. 

                               Preamps...McCormack TLC-1 and Melos tube preamp.

                               Amp is McCormack DNA 0.5

Understand that different components will have different interactions with each other. Your results may vary. However, IF you don't like it, it takes just a few minutes to put the preamp back in the system. Nothing to lose and lot's to gain. After hearing this, I will NEVER go back to using a preamp. 

Good luck!

 

 

gdaddy1
davedead
11 posts
 

I had the opposite results when adding a preamp between my DAC and amplifier. Adding the preamp greatly improved the dynamics and the imaging. I have an older Audio Alchemy DDE v3.0 DAC and a Acoustat TNT120 amplifier with Kef Uni-Q’s. I put in a Klyne Audio Arts preamp and was astonished at the improvements.

ozzy62's avatar
ozzy62
3,151 posts
 

I'm shocked that  you guys with difficult to drive speakers and low gain/low input impedance amps find an active preamp to sound better. Shocked, I say!

lanx0003
860 posts
 

No offense but I think we are repeating the story telling of the parable of blind men and an elephant.  According to Wikipedia, the moral of the parable is that "humans have a tendency to claim absolute truth based on their limited, subjective experience as they ignore other people's limited, subjective experiences which may be equally true." 

For me, understanding the intricate elements inside a preamp and how they synergize with other components remains a puzzle. Waiting for a knowledgeable person to shed light on what truly enhances the system's sound quality. Mr. Paul McGowan discussed the concept of 'separation' between the source and amplifier, speculating its impact. Additionally, he mentioned the potential benefits of negative feedback in enhancing linearity and distortion performance.

wolf_garcia
6,708 posts
 

My original version Schiit Freya has a passive setting (two actually, one with FET enhancement for longer cables supposedly) that lacks the gain of the tube setting but still...it's passive. I use it to keep the tubes "honest" (are they dying?) but prefer the tubes as I like the gain, and they pull more detail from the source and fool me into thinking I'm having a good time. They're NOS GE 6SN7GTBs that really last a long time ( years...I have a backup set in case they start deteriorating).

mahgister's avatar
mahgister
13,101 posts
 

There is no simplistic explanation for a preamplifier or against it ...

It is relative to electrical matching, volume control, tone control , the specs of the dac source and the spec of the amplifier and i forgot probably many other things...

There is no singular rule here as the simplistic eliminate the preamplifier all the time or put a preamplifier all the time ...

And which preamplifier tube or S. S. and for which amplifier Tubes or S.S. ? From which dac S.S. or a tube one ? etc...

You must read the electrical specs compatibility first then listen to it .,..

 

The preamplifier you eliminate can even be replaced by a better one... Or perhaps you dont need one really ... Do you need tone controls and tube sound and volume control ? etc

Do you need a headphone out absent from the power amplifier ?  etc

😊

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