Amplifiers for dynamic headphones

Here is a rundown of any products I have in stock at any given time.  Given the demands of my day job I do not accept orders ahead of time, I just sell what I’ve built.  This also works better with the more experimental nature of what I do as we are always coming up with new designs and/or changing older ones. Feel free to contact me at spritzer@mjolnir-audio.com if you are interested in any item here.  I will reply to every mail so if you haven’t received a reply within 24 hours then feel free to send me another email.  Email gets lost all the time, it is flagged as spam or something like that.  All prices in US dollars (USD).

Here is something I’ve been working on for a while, the Pure BiPolar or Dynalo Mk2.  The Dynalo circuit has been used in a lot of amps over the years but as parts have been obsolete it was time to finally update it.  The biggest difference is the input stage which is now “super symmetry” as Nelson Pass called it but it means it can take a single ended signal (RCA) and converts it to balanced without any extra circuitry.  That’s why the amp has only one balanced output socket, it is always balanced.  Other changes are higher rail voltages and higher Class A bias for more power.  To power the amplifier modules it has my own version of the ultra stable GRLV (Gold Reference Low Voltage) power supply which is just about the best power supply we can design fed by an oversized transformer.  The end result of this is one of the best dynamic amps we’ve ever designed.  It’s highly transparent and able to cope with even the most demanding loads.  These all now feature the gold plated Teflon output socket plus the chassis has been upgraded a bit

New batch of these has been finished and it is likely the last one.  Not really enough demand compared to the electrostatic amps so I went all out on these and fitted them with upgraded parts, even more hand selected parts too and the like.

Price: 2200$ plus shipping

Page updated 22.01.26