The Echo is an amazing little wonder. When I got mine Last year, to use it with my ZMF Verite/Aeolus and 6xx, I was blown away with the presentation too. Upgrading your power tubes was certainly a good move. If you are interested in getting a different sound signature from the power tubes in the future, you may like also the "Foton" 6n6p. However.... to my ears the real potential of the Echo is obtained when you upgrade the input tubes. The 6n1p´s included with the amp are not bad, but the qualities of the Echo are beyond the performance of those tubes. if you ever try a balanced pair of 6922/E88CC, you will be even happier with your Echo. (quieter, bigger soundstage, instrument separation and tonal balance).

You are one lucky person! The noise you describe could be "mobile phone bleed through". I have a Tube Amp and on occasion I also get the interference. Try and make sure any mobile devices are kept away from the tubes. Happy listening.

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Looks a great bit of kit- enjoy.

OTL can make radical changes to sound of high resistance headphones, with my VC on solid state I was a little disappointed but after switching amps I love them

Very good decision to upgrade your HP system with such wonderfull amp, congrats! Many good staff are comming from Poland. Coinsidence or not, I own solid state HP and pre amp made in Poland ( you can see on my channel white colore one ), matches my AKG K702 just perfect. Need to try out with AUDEZE and HiFiman that my good friend owns. As for the amp. OTL amps usually dont have anything you were worry about, its all about design, used components, transformers in particular and tubes to finish that and you seem to got it all. Thx for sharing and enjoy!

Really good and informative review

I’ve got it and use it with sennheiser hd600. Heaven!

Ive had one about a year--purchased from Upscale; nice little unit! I got an inexpensive Niles switch box that did not degrade the quality. Went that route because I run two tape units in the system. I prob should upgrade the cable and power cord which I am sure is probably monoprice and stock..lol. I agree--no noise, clinical though...prob because I use stock tubes... therefore I still prefer listening without phones. But on my off days when I am home the boy has a telecall job based at home---so then the feliks is very beneficial.

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Pretty sick, dude

So you like tape saturation distortion. Back in the day had a B 77 with Grandmaster 456 and at 15 ips sounded better to me than the album, same reason. If you like OTL's check out Transcendent Sound Kits. Their 300B based headphone/preamp is amazing. I also own a 7 watt EL 509 based, SE OTL@ 16 Ohms and a 60 watt Class AB 6C19PI based OTL. I used to build very non commercial , totally discrete, aerospace grade circuit elements, Class A MOSFET output with 4 toroids/amp, 350,000 uf double bypassed output stage Capacitance, HEXFRED, ultra high speed, soft recovery diode based rectifiers, and the generic circuit element OTLs so outclass the solid state.

I actually wondered when you were going to get into headphones. I two tube headphone amps, one by Vincent audio, one by icon audio hp8 mkii, with a huge transformer like you have on the Felix’s and two solid state headphone amps, one by Simaudio 230hd, which does operate as a preamp and I have had a turntable hooked up to it and a Schiit stack. What is weird is the Icon Audio hp8 mkii has nearly doubled in value since I bought it, the only component that I own to have done it. I own approximately 10 pairs of headphones maybe more, from Sennheiser, Mr. Speakers, Hifiman, Meze, Focal, Audioquest, Fostex, I love my Clears. I have heard the Audeze hd3 and the Meze Emphyreans, which are simply awesome. I have a separate power conditioner just for the headphones as I have a streamer, turntable and CD player hooked up as source components, just for my headphones in another room. That splitter sounds nice and for now I use a Schiit Sys for switching when I use the tube amps and I have more inputs on the Simaudio headphone amp. Headphones are a more intimate listen and can sound as good if not better for a lower cost, but be careful as it is a slippery slope as headphones all have different characteristics and you will want to try and buy many.

Thank you for the review. I'm looking for an amplifier in order to listen to jazz, brass in particular. Do you suggest it? Does it work well in your opinion with low ohm headphones? Thank you again. Luca

Thanks for the interesting and helpful video. You mentioned that you had purchased a Kimber splitter for your amp and would leave some contact details for Kimber in the link below your video? I am in a similar situation - I have a Kimber RCA cable and have now purchased a second headphone amp/pre-amp, and would like to be able to connect both amps via the use of a splitter, if that is possible...Thank you.

Can I have your opinion on the upgraded fuses, in a general sense, were they really worth adding?

Hi VP I just order a Focal Clear do you still recommending this amp for something like Focal Clear? Or should I check other amp arround this price? Thanks great review authentic.

How is your friend doing with his audio store in Vegas? That is a tough business right now.

Hey! How's it going, fellow /Seattleite here, well, I was, now I'm in Snohomish temporarily. Question: Are you still happy with your Sonus Faber Lumunia one speaker? I really like the look and size and the reviews, but they are not in stock locally anywhere. Thanks! Enjoying the channel

I have a dark horse tube amp

have you tried running the pre outs as a preamp through the mac amp ? if you do let us know

Check out gold point audio for a very high quality rca splitter box.

Hey I like your videos very much keep up the good work. I myself have had Felix-audio echo for several years. I've been listening with Focal elenar headphones, which are a heavenly pair. Another headphone worth trying is the beyerdynamic T1.

do you have any idea what your rig cost or do you not even want to know anymore . its awesome you cant be married a woman would never understand it