2. amps-preamps
  3. 1326215763

Jeff Rowland 625 amp ... & 725

Some months ago I was already positively impressed when I had the opportunity to compare the 312 (class D) to the new 625 (class AB) in the same system ...

today my dealer told me that Jeff Rowland has sent him a new "platine" (board in English?) to install into the 625 and that it is sounding even better

this upgrade seems to be free !

I am very looking forward to hear it and wondering how will be sounding the 725
clavil
guido.d.corona
35 posts
 
Looks like JRDG has finally posted M725 mono amp specs at:

http://jeffrowlandgroup.com/kb/questions.php?questionid=592

Purely from memory.... 330W at 8 Ohms, 640 at 4 Ohms... 1500W power supply with PFC, ceramic boards, class A/B... no overall feedback.

Guido
clavil OP
254 posts
 

640 at 4 Ohms... 1500W power supply with PFC

I don't understand ?

and PFC or PSU ?
inpieces's avatar
inpieces
199 posts
 
Read knowledgebase at JRDG - Power Factor Correction.
http://jeffrowlandgroup.com/kb/
guido.d.corona
35 posts
 
Claude, the external PSU device cannot be applied to power amplifiers at all.... It was designed for low current applications only. It is currently compatible with Corus and Aeris. In the future, it will be compatible with the Criterion follow-on preamplifier.

M725 is powered by an internal high speed DC SMPS fed by a 1500W PFC unit, also internal to the M725 chassis.

Guido
guido.d.corona
35 posts
 
And just in case anyone asked... No, PSU is absolutely NOT compatible with the now withdrawn Criterion or Capri any other preamplifier... If you ever managed to connect the two by some jerry-rigging, you will likely end up with cute little fireworks, followed by even cuter blue smoke, charming smell of singed circuits, and.... not so charming knashing of teeth (your own teeth, that is). G.
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