2. amps-preamps
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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
danielk141
489 posts
 
Google:

wizardhighendaudioblog

click on the "CES" link

click on "amplifiers"

scroll down & you'll find pictures of the 625, 725,
and PSU.

the PSU is as large as a good sized preamp.

it will probably be expensive!
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
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