Portaphile V2^2 Maxxed

I just serviced one the earlier Portaphile Amplifiers, a V2^2 (read V2 Squared) Maxxed.  This amplifier is a predecessor to the 627 line of amplifiers where  there are three channels (L, R & G) plus two buffers per channel (for a total of 6 BUF634u).   It was powered by a single 9V battery which provided a voltage swing of +-4.5 volts on a fresh battery.  Because of the lower voltage available, I built the amplifier around Analog Devices AD8610’s where there were three opamps, one each for L, R and G.   It also used the legendary Black Gate NX capacitors in the power supply which eventually resulted in the V2s demise.  When I started building the V2, the best capacitors I could find were the Black Gates but they were already going out of production.   As soon as the limited stock in the marketplace was gone, I decided to retire the V2^2 Maxxed and started working on it’s replacement, the Portaphile 627.

If your familiar with the V2^2 Maxxed, own one currently or had one in the past, please post your thoughts here.  I’d like to hear from you!


8 Responses to “Portaphile V2^2 Maxxed”

  1. Mike January 2, 2014 at 4:35 pm #

    Hi Cesar – that looks like my amp you may have serviced! Best portable amp I’ve used.

  2. Jason January 10, 2014 at 12:34 am #

    I have a V2^2 Maxxed in a raw aluminium case. I have not used it in several years though. The headphone jack has gone bad and I have not had time to replace it.

    Excellent amp all around just need to fix it.

    • PortaphileAdmin January 10, 2014 at 3:37 pm #

      Ship it to me and I will be more than happy to fix it for you. Just cover the shipping fees! Email me for the shipping information.

  3. Terry April 27, 2014 at 5:31 am #

    I have few other portable amps and many more went through my possession but my Maxxed Portaphile portable amp is still with me and gets regular listening. It is serving as a desktop amp rather than portable though due to short battery life. I am powering with the Elpac 15V power source. It is one of the amp that I can’t part with even if it is older model. And it is good to know that I can still have place to be service if it ever needs it.

  4. Gianluca January 21, 2015 at 2:17 pm #

    Hi, I have a Portaphile V2^2 bought years ago, maybe not the maxed one but with blackgate capacitors. Really liked this amp with my Grado SR80 and Etys ER4P but I’m not listenig to it anymore because of the annoing unbalance between channels (the right one sounds louder than left). I’ve lost the notice with the deep switch positions so now they are all on. I would like to get it repaired

    • PortaphileAdmin January 29, 2015 at 10:17 pm #

      Hi Gianluca, I will be more than happy to take a look at it for you! Email me and I will send you the shipping instruction as soon as I hear from you. Thanks!

  5. Sven January 22, 2016 at 7:49 pm #

    I Picked up a secondhand Portaphile V2^2 and whilst its in the post I looked for a user manual online but I can’t find one. So I was hoping you can help.

    • PortaphileAdmin January 22, 2016 at 8:14 pm #

      Hi Sven, I shot you an email regarding your question. I don’t have a manual for this amplifier but sent you some information regarding the internal switch configuration and some useful tips for the V2^2. Hope you enjoy it and please send me some pics I can upload to website! Thanks!

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