I made a dozen amps in 2019 using the IcePower IecEdge 1200AS1 mono amp modules. I spend months tweaking the module to make is sound way, way better than stock. I can do these same mods to the PS Audio amps or any other amps that use these IceEdge modules. It is easier to do the mods on mono amps but it can be done on the stereo module as well.
Link to page showing and describing my mods to the IceEdge mudules:
The PS Audio 1200 mono blocks are very good amps. They take the IceEdge modules and remove the coupling caps and 47K resistors that are no longer needed (because of the added tube input stage)....and then add a tube buffer and there you go. A good amp. However, they don't do any serious mods to the IceEdge modules, the AC power supply inlet, etc. and the binding post system are not good. The IceEdge module already has 27db of gain. It does not need an input stage. If you add an input stage, you are just adding that sound. However, since PS Audio does not tweak the IceEdge module then some distortions need to be masked via using a good tube buffer....this makes sense. However, even better is to remove the distortions from the module and then you don't need a tube buffer and you get better sound for way less (modded Rouge amp). If you want a little tube sound then adding a tube line stage or DAC makes more sense. I do not remove the tube input stage on my mods to the PS Audio 1200 amps.
But if you really like your PS Audio amp then your are going to LOVE it modified. Everything will be better. However, if you want this level of sound and don't want to spend $6600 then modding a Rouge dual mono stereo amp will blow you mind for around $2100.
You can buy a dual mono stereo IceEdge amp from Rouge Audio Design for about $1550 delivered to the US. These are the exact same modules that PS Audo uses. You add my mods (around $800) and you will have a superb amp that has very high power for around $2350 (essentially 39% the price of the mono PS Audio amps). The input impedance of the modded amp would be 150K per phase.....real easy to drive.....higher input impedance gives better sound.
Legacy Audio is also selling a dual mono stock IceEdge amp for $4785.......if you own one of these I can mod that too. However, the Rouge Audio Design is exactly the same thing for $3200 less.
You can also buy a stereo IceEdge 1200AS amp from Nord, Apollon or Rouge for around $1200.....add my $350-$700 mod and you are good to go. There are used stereo IceEdge amps on the market from time to time (Mivera brand and others) that can be purchased for $800 or less. Lots of options.
A modified IceEdge module gets you 600 watts a channel into 8 ohms and 1200 watts a channel into 4 ....this is a ton of power.
Some speakers crave this kind of power.
Pricing:
Stereo module mod: (no AC mods or binding post bypass mod) $350 (Includes new input wires and new speaker output wires).
Dual mono stereo module mod: (no AC mods or binding post bypass mod) $400 This is for two mono modules in one box. (Includes new input wires and new speaker output wires).
Mono block module mod: (no AC mods or binding post bypass mod) $425 for the pair. (Inclues new input wires and new output speaker wires).
AC mod: Includes Furutech AC inlet and great wire....stereo amp $150.....dual mono stereo amp $200 Mono blocks $250
Binding post bypass mod: Includes new copper binding posts, drilling holes and installing wire.......$200 for two channels.
All out mods for a stereo amp would be: $350 plus $150 plus $200 = $700
All out mods for a dual mono stereo amp would be: $400 plus $200 plus $200 = $800
All out mods for a pair of mono block amps (like the PS Audio amps) would be: $425 plus $250 plus $200 = $875
If you already have a Furutech AC inlet, or great AC wire or great binding posts then the cost of the AC mods or binding post bypass mods would be less or not needed.....please call for options or other info. All prices plus return shipping
