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We took this little 625 S2 on trade. Testing it out today. It’s so little!
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Class D?
Of all the JRDG pieces, this one seems to get the most consistently positive reviews and user accolades.
All, some clarifications on the Rowland M625 S2 stereo amplifier....
This amp runs in class A/B, not in class D.
It does not contain an LM3886 module.
M625 S2's power supply subsystem contains, among other things,a Power Factor Correction (PFC) rectification module, a Switch Mode Power Supply (SMPS), and a bank of 4-pole capacitors.
Concerning PSU.... There is no PSU inside the M625 amplifier. In the Rowland lingo, PSU is a very specific product. Its full name is Power Storage Unit. PSU is a full chassis external DC power supply created for -- and is compatible with -- the Rowland Aeris DAC, the Conductor Phono stage, and the Corus preamplifier. PSU is based on ultra-capacitors (a.k.a. supercapacitors). it extracts AC in periodic bursts from the AC mains, stores it as DC in the supercap bank, and delivers a continuous clean DC stream to the component downstream. There is no power storage circuitry inside M625 S2.
More information on the Rowland M625 S2 can be found at:
Jeff Rowland Design Group › model-625-s2
Regards, Guido
this is a great amp - has more of a midrange presence than typical SS. i wouldn't say its tube like, but just sounds good. particularly if you are into jazz, vocals, etc.