Do DACs benefit from preamps?

  Рет қаралды 20,327

Paul McGowan, PS Audio

Paul McGowan, PS Audio

Күн бұрын

The general consensus is less is more so why do some people prefer the addition of a preamplifier between their DAC and their power amplifier? Have a question you want to ask Paul? www.psaudio.com/ask-paul/
I am getting close to publishing my memoir! It's called 99% True and it is chock full of adventures, debauchery, struggles, heartwarming stories, triumphs and failures, great belly laughs, and a peek inside the high-end audio industry you've never known before.
I plan a few surprises for early adopters, so go to www.paulmcgowan.com and add your name to the list of interested readers. There's an entire gallery of never before seen photos too.

Пікірлер: 69
@jackb2374
@jackb2374 4 жыл бұрын
I wish all youtubers audio sounded as good as this gentleman.
@durchreiser6573
@durchreiser6573 5 жыл бұрын
My little supersystem is a Rega Planar 2 to a Graham Slee Accession Phonostage (with volume knob) to Wyred4sound monoamps. I love it.
@TheRockerxx69
@TheRockerxx69 5 жыл бұрын
We are using more and more digital music. So DAC with a volume does the job. I do not use my pre amp anymore. Only if l use my tubed VTL 5 phono pre amp.
@workaholic7600
@workaholic7600 5 жыл бұрын
Thank you Paul. That has been a question in my mind for a few years now.
@MrRoberacer
@MrRoberacer 5 жыл бұрын
Hey Paul. That was a super interesting thing. Did you ever get any clues as to why that happened? Indeed as you say it makes absolutely no sense that adding more to the signal chain is going to improve resolution yet here is an example of such a phenomenon. This kind of thing often leads us to some really cool new understandings.
@WildernessMusic_GentleSerene
@WildernessMusic_GentleSerene 5 жыл бұрын
I hear a brittleness when bypassing a pre-amp. This applies to my recording and live instruments as well. I could direct inject mics and line instrumnets directly into the digital recorder...but I don't...I feed everything through the mixing board first (a mixing board in a recording studio is basically is a pre-amp). And the brittleness is gone. With active speakers one would want to go directly from DA conversion to speaker, but again, just not as warm and inviting for any and all instruments and vocals.
@20CycleMonger
@20CycleMonger 5 жыл бұрын
Thanks for sharing your experience, Paul. This is the problem with power amps: you always wonder if bypassing the preamp is better. I have a second set of inputs on my bridged monobloc amps. I'm thinking of using a passive volume control after the DAC/tube buffer stage as an alternative input..... Looking into ALPS or stepped resistor passive preamp types . It's a relatively cheap alternative experiment, but the preamp stays for input switching and turntable duties :-)
@Cookythecook
@Cookythecook 5 жыл бұрын
fantastic video! thanks Paul!
@Peter_S_
@Peter_S_ 5 жыл бұрын
Another pragmatic answer about a subject that causes so many to become deeply emotional. Thank you Paul for "keeping it real".
@terrywho22
@terrywho22 5 жыл бұрын
Of course, if you have more than 1 source, that preamp can come in handy. :^)
@s2030081
@s2030081 5 жыл бұрын
Paul, will the true reason behind was just "synergy"? I have been using Marantz HD-DAC1 for 3 years with my HD 700 headphone, the sound was dull. When I got a Sprout and route the line out of HD-DAC1 to Sprout, it sounds alife to me but I don't hear loss in details. Or just the DAC part of HD-DAC1 not good enough to have the same observation as yours?
@MrKeech666
@MrKeech666 5 жыл бұрын
xDSD-->iTube2-->iCAN SE = musical bliss! The pre-amp made ALL the difference.
@TheRollingStoness
@TheRollingStoness 5 жыл бұрын
24 bit rip file from LP , played from the android with bit perfect mode through USB output to a Schiit modi 3 DAC to an integrated amplifier....heaven for me
@chadbarker2316
@chadbarker2316 4 жыл бұрын
Wish I could have met Arnie Nudell! Bet he was cool as shit . Know you miss him a lot cause I've watched your videos everyday for 2years and you always mention him. Much respect Paul for the way you always honor him. That's one of the reason I watch you and to learn cause this ole construction worker will never be able to afford your gear! Hahahahaha
@tristannolan85
@tristannolan85 3 жыл бұрын
what do you think about the onkyo p304 preamp
@ericnortan9012
@ericnortan9012 Жыл бұрын
I run my DAC as a preamp. It is made for it. Very clear, precise sound. However, not super "musical" as Paul would say. I am in the market for a new tube preamp to give it a little more musical tone. I figured a solid state preamp would do very little and I would like to try some tube action, see how it goes.
@gotham61
@gotham61 5 жыл бұрын
I came to the same conclusion using your own products. I had a PS 4.5 followed by a 5.0, and they always sounded better with the line stage on. More drive and dynamics. I even built my own high end passive box using a Spectrol pot, but it was still better with an active line. And yes, I paid close attention to loading and cable lengths. Maybe with a super exotic preamp there aren’t any compromises, but for me this is still true at a budget level
@y.k.9705
@y.k.9705 5 жыл бұрын
My $114 preamp does a good job preamping. I needed a volume control so I bought one I thought would do least harm.
@AudioCrossingVideos
@AudioCrossingVideos 5 жыл бұрын
All a good DAC needs is a properly designed output stage, and the simpler the better. With flagship-grade voltage-out DAC chips, often the best fidelity is achieved with the output pins of the DAC chip wired straight into a pair of 600:600 ohm transformers that have a Permalloy or amorphous metal core, with output taken straight out of the transformer secondary. In testing, I have found the on-chip digital volume control to kill the measured performance(at low volumes), but actually sound much better than adding an ALPS or even a TKD volume pot at almost all other volume levels.
@christophschuermann6512
@christophschuermann6512 5 жыл бұрын
nice topic but hard to answer yes or no. There are so many factors in the different setups like cabels, amplifiers, powersupplys etc. so try it out and listen.
@matthewhilty4209
@matthewhilty4209 5 жыл бұрын
Does this apply to your "affordable" line of Stellar preamps? I am saving up to replace the sad sounding Yamaha in my living room and just tossing away the bad plastic surround speakers since they really don't add anything good to the sound.
@thomprd
@thomprd 5 жыл бұрын
My Stellar GCD sounds really good. What I think Paul is saying is that if you add a $6000 preamp then it will be better. You would hope for $6000 it would sound better. My advice would be to be sure your main speakers are the absolute best you can afford. Really good speakers sound better with a $100 Craigslist receiver than not so good speakers with a Stellar stack. Get both if you can.
@matthewhilty4209
@matthewhilty4209 5 жыл бұрын
@@thomprd , Ok good to know , I should have been more specific, I have a fair amount of speakers, but not had any luck with surround sound , I have some NHT2.5i and 1.5i , along with some R100s and a set of Denon bookshelf speakers, I was just going to give up on the "in the box" type of home theater Yamaha set and replace it with a 2 channel because I can't get good sound out of a standard home theater set.
@airgead5391
@airgead5391 5 жыл бұрын
Paul, this goes for only high quality pre amps with a tube or also for solid state? I am very curious if a tube would only do the job.
@69eddieD
@69eddieD 5 жыл бұрын
Tube circuits typically have far higher distortion than modern solid state circuits.
@wisetank135
@wisetank135 3 жыл бұрын
@@69eddieD that is good distortion.
@octilliondollars
@octilliondollars 5 жыл бұрын
Why not take whatever part of the preamp that improves the sound and build it in to the DAC or the amp?
@gasgasgas
@gasgasgas 5 жыл бұрын
Because then it is one less piece of equipment to sell. :)
@y.k.9705
@y.k.9705 5 жыл бұрын
@@gasgasgas most people have a mortgage to pay. 😂
@tobykan8243
@tobykan8243 5 жыл бұрын
Hi Paul , apart from the impedance matching , average of power amp input sensitivity is 1 V peak to peak . Unless u have a high sensitivity power amp i.e. 500mv input , direct from DAC seems hasn't got enough gain to drive the power amp . Once I add a simple tube pre Amp , the result is stunning ! exactly as you said. Thank you for your education.
@markgigiel2722
@markgigiel2722 5 жыл бұрын
I have some nice equipment at home, but rarely have the time to just sit and enjoy it without a lot of things going on around me. So, I have to say I have even listened to an Iphone playing music while placed in a solo cup while camping. It was better than no music at all but just slightly. On another note, If you can't afford and get really good speakers, don't bother with the rest of your system being high end.
@ericnortan9012
@ericnortan9012 Жыл бұрын
I disagree. They have very good sounding "budget" speakers. When you hook up higher end equipment to them, you bring out the best in them. Most people must build a system, they can't afford anything close to "high end" all at once. Building a system to match your speakers is probably ideal, but the argument goes both ways. You wouldn't want to hook high end speakers up to budget gear either in a perfect world. To me it's part of the enjoyment, getting the best out of the equipment and actually hearing the improvement as I add/subtract components. I have decent stuff, but I always attempt to upgrade to much better equipment if I change something, that takes money and time. A mixed up system can be really good, you have to look at it as a work in progress. IMHO.😁👍
@flargosa
@flargosa 5 жыл бұрын
If your Dac has variable volume and it outputs enough voltage as high as a preamp, maybe 2v or higher for long interconnects. Then isn't a preamp redundant, if all you want is volume control? Unless you like a particular preamp for its coloration, only reason I see using a preamp.
@flamencoprof
@flamencoprof 5 жыл бұрын
Saved me from some writing there!
@Enemji
@Enemji 5 жыл бұрын
I have always wondered is it “drug” or “dragged”? 4:19
@wildcat1065
@wildcat1065 5 жыл бұрын
dragged.
@1wired4sound
@1wired4sound 5 жыл бұрын
I have a nice BAT tube pre between my Mytek Brooklyn+ pre and my amps. I tried going directly from the DAC to the amps, I didn’t like it personally.
@TheMB2333
@TheMB2333 5 жыл бұрын
You speak about the volume control potentially losing resolution. You mention DirectStream. Does this also apply to Stellar? I've been considering this line for the past week as a foundation with the 2 monoblocks. As a serious inquiry, I contacted your sales and asked how they perform with the KEF R700 series. Your rep loved the setup and was a huge fan of KEF with the Stellar series. (just a side note).
@wildcat1065
@wildcat1065 5 жыл бұрын
Went the passive preamp then no preamp route for some years with same logic - best preamp is no preamp. Trouble is, it isn't true. It seems to defy logic but putting the extra gain stage of a good active preamp in increases size of soundstage , dynamics and musicality. Is this just adding euphonic distortion ? I don't know but whatever it is I like it. However, for someone on a limited budget I would recommend a variable output dac to start with and blow your budget on a better power amp. Then experiment with adding a preamp later when funds permit.
@ThinkingBetter
@ThinkingBetter 5 жыл бұрын
John Rest assured the preamp does not actually make the signal closer to the original but rather adds some noise and distortion to it. Preamps can flavor the sound e.g. if a tube is involved some even order harmonic distortion might make you feel the sound is more musical with more ambience. Personally I prefer the cleaner and more audiophile direct sound without a preamp.
@wildcat1065
@wildcat1065 5 жыл бұрын
Yes, probably just a matter of taste.
@69eddieD
@69eddieD 5 жыл бұрын
A "passive" preamp can degrade the signal too, primarily because of stray capacitance effects. To avoid this, you can use a lower value potentiometer (say 10K instead of 100K) which can overload your source and significantly raise its low frequency pole. I build buffered analog potentiometers. I use ultra low noise op amps and resistors. These buffered potentiometers present a constant, appropriate load impedance (47K or 100K depending on application) to the source and can drive a very long cable on its output with no degradation of frequency response at all. You simply can't do this with a so-called "passive" preamp. Passive preamps degrade "soundstage" because they degrade frequency response. This is an observable, empirical fact. You can use my buffered potentiometer as a line driver if need be. It greatly mitigates the effects of stray capacitance.
@wildcat1065
@wildcat1065 5 жыл бұрын
Eddie X .You are stretching my technical understanding a bit here I'm afraid but isnt a buffered potentiometer with op amps effectively an active preamp ?
@5yotub
@5yotub 3 жыл бұрын
My country 🤩
@gurratell7326
@gurratell7326 5 жыл бұрын
A DAC can be a preamp. I'm using my MiniDSP 2x4HD as one ;)
@dannywoods3928
@dannywoods3928 5 жыл бұрын
And an amplifier can be integrated, like i have. Suppresses sound better but cost more
@aaroninja1
@aaroninja1 5 жыл бұрын
Es la primera vez que veo una pregunta de un peruano en este canal.
@xxxXXXCH04XXXxxx
@xxxXXXCH04XXXxxx 4 жыл бұрын
Lo mismo pensé!
@rotaks1
@rotaks1 5 жыл бұрын
Paul, would a emotiva preamp count as a DAC worthy product?
@rotaks1
@rotaks1 5 жыл бұрын
I am skeptical about getting an answer.
@brianmoore581
@brianmoore581 5 жыл бұрын
Oh, come on, Paul, name those names! By the way, would you consider a Pass XP20 a "top preamp"? Just curious, not that anyone is going to change my mind about it. I think it's the best component I have ever bought.
@nicktaylor7680
@nicktaylor7680 5 жыл бұрын
Italo a good preamp makes the sound more musical and less sterile sounding. It is possible to find a good preamp for a good price you can find it here: www.china-hifi-audio.com/en/pre-amplifier-c-43/xiangsheng-728a-vacuum-tube-pre-amplifier-japan-circuit-black-p-351?zenid=9abb070d68f7bd3e48423b8d436a3dd1 To many audiophiles it becomes an March toward resolution and detail . It's a vicious cycle your ears become accustomed to yet more resolution and more detail and all of this costs a lot -it's like crack cocaine!
@jordanlewis3790
@jordanlewis3790 5 жыл бұрын
aaaaaahh stop making me question my favourite pieces of kit
@miroslaved
@miroslaved 5 жыл бұрын
escuchad mi ep for the love of charles mingus en bandcamp please
@InsideOfMyOwnMind
@InsideOfMyOwnMind 5 жыл бұрын
OK. Preamps are there to add gain.👍 Gain in and of itself doesn't hurt sound.👍 It's the passive bits in between the gainy bits that hurt the sound.👎 The more you do to the passives to help it the more gain is lost. 😠SO...think of gain as just a tool to get through the interstage carnage relatively unscathed.👌 That's my thought. Bye 😎 (In this equation the active components also contain passive aspects that have to be considered as well).
@69eddieD
@69eddieD 5 жыл бұрын
Preamps also provide a low drive impedance for the cable, which mitigates signal degradation from stray capacitance.
@ThinkingBetter
@ThinkingBetter 5 жыл бұрын
No, we don’t need a pre-amp after a DAC. In fact, a pre-amp does not add anything positive except a volume control that cost nothing to do on a 32 bit DAC.
@dannywoods3928
@dannywoods3928 5 жыл бұрын
I'm sure everyone would love the know it all here to build us his perfect dac preamp.
@ThinkingBetter
@ThinkingBetter 5 жыл бұрын
Danny Woods Companies making pre-amps will tell you that you need one.
@akeelshah7904
@akeelshah7904 3 жыл бұрын
i know i am still a beginner so I'll mention my story take it with a grain of salt so last year my av died and i got a denon poa t2 poweramp in a pinch it sounded much better than my modern av so i was curious at this moment i didnt have a preamp so was looking around for one that fit my needs which was include a subwoofer out 😂 so i got the emotiva pt100 but it arrived faulty and when i saw pictures online of the internals i wasnt inpressed so i was like ahh oh well probably wouldnt do much apart of give me volume control (at this time i had it pluggef into my pc and used windows for volume control ... yesterday i got the Denon Avp a1 preamp processor and hooked it up the internals looked so beefy but i didnt expect much yet everything did sound better the mids especially were in the best balance ive heard on any speakers so i was like whaaat then i realised it almost felt like the room was the speaker and this is something ive read about and never understood so although I haven't experianced a proper dac other than whats in the pc motherboard i can definitely say they can add something positive it does sound how i imagined it to sound not overbassy or underbassy not low on highs everything is perfect bare in mind my setup is in my bedroom so not spaced out perfectly yet the next step is to connect a subwoofer but yeah preamps when made decent can definitely be a positive oppose to directly from a pc my equivalent to a cheaper dac its a modern pc with the sound chip portion on a seperate section to the rest of the motherboard and yeah generally never had an issue with it but i have fallen in love with this setup i hope it has decent subwoofer management
@ThinkingBetter
@ThinkingBetter 3 жыл бұрын
@@akeelshah7904 There is no reason why adding a preamp should improve the sound unless you rely on a poorly designed volume control elsewhere. PCs are often not good direct sound sources due to use of low-cost DACs and poor volume control (losing resolution). An external DAC with proper volume control is far better than using an external preamp.
@akeelshah7904
@akeelshah7904 3 жыл бұрын
@@ThinkingBetter im sure thats right that if u have a decent dac u can by like that but a decent preamp doesnt make ur sound worse it can improve audio... also there are benefits and drawbacks to both for example me being able to have the flexibility going from stereo to surround without having a sucky av receiver for movies and then great stereo... dacs are great options but preamps are also great
@draganantonijevic2441
@draganantonijevic2441 5 жыл бұрын
(Audio)Religion... near dear the hart... and then...
@kalijasin
@kalijasin 4 жыл бұрын
If you put crappy audio in you will get crappy audio out.
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