The supply voltage will certainly drop once it has a load applied. Yours will probably be Ok. The voltage limitation is in the front end cards. Ishikawa and Austin are safest around 24V or below. Tucson depends on the opamp. The other front ends have built in voltage regulation.
The output stage current is independent of the rail voltage. This is a special attribute of the M2.
The output stage current is independent of the rail voltage. This is a special attribute of the M2.
Hi
a new M2x is born
This amp is just sooo good
Many thanks again to the one and only @Nelson Pass, to @Mark Johnson and to @6L6 Jim.
And of course many thanks for the help and feedback
a new M2x is born
This amp is just sooo good Many thanks again to the one and only @Nelson Pass, to @Mark Johnson and to @6L6 Jim.
And of course many thanks for the help and feedback
I’m honored for the mention, but the fantastic amplifier that is M2x is really because of two people - Mark Johnson making some fantastic additions and iterations to the idea started by Nelson Pass.
Your construction is absolutely beautiful!!! I think it has to be the best M2x ever built!
Your construction is absolutely beautiful!!! I think it has to be the best M2x ever built!
^ Gianluca may need to put the "Plott special edition" series chassis into his lineup. . Your designs are gorgeous. Cool application of having your RCA grounds and signal wiring completely separate. I've never seen that before. Did you post pics of the internals previously that I've either missed or my feeble mind has forgotten?
. Your designs are gorgeous. Cool application of having your RCA grounds and signal wiring completely separate. I've never seen that before. Did you post pics of the internals previously that I've either missed or my feeble mind has forgotten?
Many thanks for your kind words, much appreciated^ Gianluca may need to put the "Plott special edition" series chassis into his lineup.
Regarding grounding, I use a Synergistic Research grounding block where all my devices are grounded. With the commercial devices I use an unused RCA for the grounding, but with the amp there is no unused one so a separate gnd connection was needed. Pics of the wiring will follow tomorrow 
you can use the "HA9P5002-9Z" version - sadly it's not stock today, but Mouser is expecting 785 on Nov 25th, which is a lot sooner than Apr 10th for the original spec'd "5z" version, with a $5 premium of course. I can tell you that Norwood is a very good daughter board and my favorite, but won't get into a debate over my personal opinion. I would say that you owe it to that classy M2x build you did to give it a try and see/listen for yourself.Many thanks Jim and AudioSan, I'm glad you like it
Next step - playing with the input stages
Sadly no IC is available for the Norwood, a replacement would be cool.
Thanks @bullittstang , I will order it. I can remember on the comparisons and that's way I want to build the Norwood.
Many thanks, glad you like them
Here the internals as promised:^ Gianluca may need to put the "Plott special edition" series chassis into his lineup.
It should be connected to the safety ground as shown in the circuit diagram, I did it that way too.
Attachments
Please keep us informed how they perform.
I now listen with the Mountain View and will swap to the Austin tomorrow - I'm curious what's your opinion.