Placing the amplifier on a grounded metal pan muted the hum.

First series of tweaks to my MSSH. Connected the 0V rail to earth with a 100Ω resistor. This eliminated the noise picked from the floating inputs. Doubled the value of R13 hoping to lower the back ground noise, it didn't change anything. Added an identical resistor in parallel with the one in

Line in is wired using braided solid core copper. Physical power rails using 18 AWG solid copper. The 4 power decoupling capacitors are Nichicon ES MUSE.

My freshly finished SSMH on it's first test drive. View of the interior. The output coupling capacitors are Elna Silmic II. The inter-stage coupling capacitors are Mundorf M-CAP MKP Series.

My freshly finished SSMH on it's first test drive. View of the interior. The output coupling capacitors are Elna Silmic II. The inter-stage coupling capacitors are Mundorf M-CAP MKP Series.

My freshly finished SSMH on it's first test drive. The tubes are 12AX7.

My freshly finished SSMH on it's first test drive. The pot, knob and output jack were salvaged from a vintage stereo. There's bad scratching sound from the pot, I'll have to find a better one.

Line in is wired using braided solid core copper. Physical power rails using 18 AWG solid copper. The 4 power decoupling capacitors are Nichicon ES MUSE.

AC side of the power supply is wired. This build doesn't use all the transformer's tabs, but I still kept them just in case I want to re-use this transformer in another project. The blue wires are a 6v secondary, isolated from the main secondary, that I will probably use to power LEDs in the tube so

Greetings. I'm an American who resides in the People's Republic of China, at least for the time being, and am considering acquiring a HiFiMan HE-560 as it's significantly cheaper out here than it is elsewhere. I've also elected to try out a tube amp. Now I'm not interested in picking up...

When a person auditions an amp, they, of course, have it paired with a DAC. How does one know that what they are hearing thru their cans is due to the amp vs the Dac? Speaking of that, what percentage of the sound that comes flowing into your headphones is due to the Dac vs the Amp in your...

Hi folks!   The moment I have waited for years has finally arrived and Pass Laboratories have just introduced their new headphone amplifier at CES.   Some of you may be familiar with Pass Laboratories. The company was founded by Nelson Pass, a world-renowned audio designer and virtually a...

Anyone heard of this headphone amp or even have one? It looks really nice with a separate power supply. It's from China and I'm having a hard time finding an English language review.   The specs look pretty good.   Product Description: AMBER Amber is truly fully balanced design headphone...

Hello all.   I was looking for a preamp and a friend of mine sold me something I had never heard about... a Coffman Labs H1-A.   He showed me pics. I fell in love.    Now that I have it, I'm speechless. It's a hunk of aluminum. A huge hunk of it. It's heavy. It's beautiful. And I can't...

The Lambert "Play It By Ear" Headphone Amplifier         The “Play It By Ear” is a headphone amplifier from The Lambert Company and part of their new “Small Wonder” line of products. Lambert’s newest products aim to be simple and musical, yet affordable and high quality. The “Play It By...

     NEW Thomas Mayer Headphone Amplifier:   http://www.monoandstereo.com/2015/04/thomas-mayer-headphone-amplifier-new.html

http://hafler.com/ha75.php     Any thoughts on this amplifier? I was actually an early adopter of a 120 watt Hafler amp when I was in my teens and bought it in a kit and put it together. Output specifications on this are very vague. Hopefully more details to come.

I need a combined DAC + headphone amp for my desk at work, to drive my MrSpeakers Alpha Dogs.  I’m a tube-o-phile.  My budget is in the $5-600 range.  Am I stuck?    The only ones I can see are the HifiMan amps (which don’t seem to be well-liked?) and then higher up the Woo Fireflies (too...

The purpose of this thread is to gather specific, objective, information on headphones amps for an "amp guide." The idea is to gather as much info as possible on as many amps as possible (both current and out-of-production models). As discussed in another thread, the guide will not include...

My wonderful USPS delivery person showed up at 8:30 am with the amp. I have never got a package that early before. I have had the amp playing for close to three hours now and this amp just plain rocks. The sound has body and tone but the amp is very fast. Maybe most noteable, this amp has a...

Hey Guys,   This is my first forum post on head-fi so please excuse me if I've made a mistake! I just ordered some Sennheiser HD 558s, which I will be using for gaming as well as music and movies on my desktop PC. I've read several threads on the site, and have come to the conclusion that the...

I have a pair of Heir Audio 4.A's currently running out of my Leckerton UHA-6SII (which I love) but I want to be able to leave that at the office rather than shifting it back and forth every day.   I like the neutral sound and would like something that kept that relatively similar. However...

I recently purchased a pair of HifiMan He-6 headphones with the intention of going for a Schiit Lyr/Bifrost setup, however I've been reading a lot about how these can be driven out of a Speaker Amp. This is the first time I've done anything like this, so my questions will probably sound really...

I recently bought a pair of Pioneer SE-500s, a power-hungry piezoelectric beast. Nothing I have has anywhere close to the output power needed to drive these things properly. I need a good speaker amp that will put out enough power for these headphones. They're most likely equally or harder to...

Hi,   What are the current players in the solid state desktop amp market? It seemed like before there were more SS choices. Besides the Schiit Asgard ($250), what other choices are there?   How does the Asgard rank compared the M^3, PPA, PPA2, Beta 22, etc?   Thanks.