Still available.

Never in storage. Stayed on my audio rack system. No pets non smoking house.

Manufactured date on tag is June 3rd 2021. Please read it carefully before posting incorrect data.

Benchmark AHB2 Balanced Audio Amplifier. Like new condition. Maybe 20 hours total time. Comes with all original documentation and packaging.

Just in case any one is looking to upgrade to the JPS labs superconductor cable: https://www.head-fi.org/threads/jps-labss-abyss-superconductor-hp-cable-2-x-3-pin.883013/

No just the LG. Sorry for the confusion...meanwhile, just got the Superconductor HP cables in. Will need to spend some quality time with them before I can comment.

LG = Cavalli Liquid Gold. Put one LC instead of LG in my original post. Now corrected.    Cheers!

About the mids:   Firstly my Abyss are new, so I reserve the right to change these comments a bit. Only 34 hours to date but continue to burn in on my new LG which is also burning in with 100 hours so far. I have been A/B testing between the Abyss and the HEK. The Abyss using the 4 pin XLR...

Could you show how you modified the XLR cables to connect them to your PSB's?

Have about 130 hours on mine. Bouncing between my GS-X mkII and HPA-21. Using balanced from my DAC2se on the GS-X, and of course SE on the HPA-21. These are really great headphones indeed. I never thought that I would hear a sound stage that was wider and more precise than my HD800's. But...

Back in January, I bought a 1tb SSD and had them swap it out for the stock HHD in my W4S Music Server. I have my components right next to my listing station, and could hear the HHD spooling up and down when accessing data. Very annoying during, very quite passages while listening to music. Now...

Couldn't agree more. Bought this for the LCD line of Headphones, but it just blew me away with what it does to the HD800! Now the HD800 gets almost all my listing time. I mean with it's huge sound stage and now with increased tight bass and the harsh treble episodes a thing of the pass, It's...

Ok, that makes sense. I can't get over how much I love this HPA-21! Coupled with my HD800, it's the best I have ever heard. And I have been at this game a very long time.   Just a smokin' combination!

Why do you have your HP plugged into the Voltage output? Why not the Current output?

Sorry, I tried the LCD-X with my HPA-21. And yes, I would say it is more neutral than the LCD-3, but it will never be able to replace my LCD-3. For me the LCD-3 sound is what I look for when in the mood for that warm, luscious, tube like, sound from my music. If I want neutral, I just reach for...

I have to agree with him on the HPA-21. It completely changed the way my HD800's sound. They now have more base and the irritating sibilance is gone from all but my worst quality recordings. I really love them now. But, I must add that I also love my LCD-3's with the HPA-21. They bring more...

So true, my Royal Princess's let my upgraded WA5-LE reach it's full potential, but at a cost. But hey, we spend what we want on the things we love!

Ok, been enjoying my Bakoon/HD800 combo for a while now. Unfortunately I had sold my LCD-3's before acquiring the HPA-21. Due to it's clamping pressure. Just could not get comfortable with them. Wishing I had a chance to  try the LCD-3, what with so many raving about the synergy between the...

Just to confirm how much different the HD800 sounds with different amps. I have the HD800/TH900. Had the LCD-3 but I just could not get it to be comfortable enough. Too much weight and clamping pressure. I had pretty much given up on my HD800's because of the lacking bass and irritating...

Yeah, I'm sure the sound is not for everyone. My sweet W4S DAC-2 se might have something to do with it!   

Well, I have had the HPA-21 for almost 2 months now, and this is what I have found. In a nut shell, am totally smitten with this amp's current output. I assume it is fully broken in now as it has around 130 hours on it. Mostly burn in with different playlist I assembled.   First, I will...

I have found that the rectifiers have little effect on the sound for my WA5. The noticeable changes are discovered in the output tubes. I have tried the EML's and while they are good, the RP's easily best them for me.

Had the LCD-3, sold them. I tested them with the HD800 and TH-900. Their sound was between the other two. I did not like the clamping pressure, or weight either. Just did not reach for them very often. Don't miss them at all with the HD800 and TH-900 to choose from.   Should receive my unit...

You really do get a benefit when you try different 300B tubes.   I am running Royal Princess 300B's now.   They made a big difference in the sound that is clearly noticeable right away. Bass tightened up and more air between instruments. I almost sold mine before trying these tubes. So...