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  New Rowland Criterion 2-chassis battery pre
Jeff Rowland Design has just created a page for its upcoming statement-level, twin chassis, battery powered full function preamplifier. Detail is still scant, but a little bit of info is already available, in addition to front and rear view pics. Here’s the page:
jeffrowland.com
And here’s the front view:
jeffrowland.com
And here’s the rear view:
jeffrowland.com

You will find a few specs already on the site. JRDG should be publishing more info in the next few weeks. I will post here as I receive it. in addition to the published specs that you can read on the page above, here are a very few additional tidbits that I have learned this far:

. Uses Burr Brown TI OPA1632 high speed fully differentially balanced modules.
. Includes phono stage.
. Uses standard NiMH D-cell batteries available in most electronics stores, loaded in 2 rear-inserted tubes of power supply chassis.
. Capable of AC/DC operation . . . will recharge batteries on independent circuit during AC operation.
. Full remote control
. Target price $18K (not sure yet)
. Availability: probably early Fall 2008.
. Will be featured at RMAF in Soundings Hifi suite Marriott 503 or 505 from Oct 10th to 12th in Denver.

And sorry folks, I have not heard this device yet. Nor I have any good third party reports on its sound. Any speculations on Sonics from my part would be just. . . pure speculations. I’ll keep everyone posted as I learn more.

Guido
Guidocorona  (Threads | Answers | This Thread)

07-21-08
  Responses (301-350 of 472)
Click title to read one, or click date to read all below it.

09-20-09   Hi guido, i lovedyour response ;-) sic"what is even ...   Clavil

09-20-09   Clavil and brazcole, all of these seem to be worthy comparis ...   Guidocorona

09-22-09   Hi guido, i met yesterday my friend who has had the esoteri ...   Clavil

09-22-09   Claude, it's quite possible that the esoteric sound may sim ...   Guidocorona

09-22-09   Thanks, clavil / claude, i already bought the puccini & cloc ...   Brazcole

09-23-09   All, time for some updated impressions. i have now been ru ...   Guidocorona

09-23-09   During listening sessions, is the ac unplugged from the prea ...   Jimjoyce25

09-24-09   During yesterday's session criterion was on batteries, but ...   Guidocorona

09-24-09   It should make a difference if you do. unplugging the power ...   Jimjoyce25

09-24-09   I agree. . . my only concern is also severing the criterion' ...   Guidocorona

09-26-09   I just finish the test with the krell 222 and the 202 as wel ...   Brazcole

09-28-09   After i test the krell 222 and the krell 202, i decide to te ...   Brazcole

09-28-09   guido, i've enjoyed following this thread. thanks f ...   Vmk

09-28-09: Guidocorona
Thank you Vito, Criterion's home theater bypass is very flexible. Any/some/all of the Criterion's balanced or unbalanced inputs can be configured/assigned to home theater bypass. This means that you could have up to 6 inputs configured as theatre bypass if you really wanted.

Note that by default, as all inputs are transformer coupled, all inputs RCA/XLR have identical gain structure. If you want to adjust input gain for any/some/all of the inputs, you can assign a gain offset +/- 10dB in 0.5dB increments to any of the inputs.

All main outputs (2XLR, 2RCA) are also transformer coupled. . . This mean that by default they would present an identical volume gain to a pair of amplifiers that you may be using in a biamped configuration. . . But for greater flexibility in biamped configurations, RCA output 2 can also be configured with an output gain offset (+/- 10dB with 0.5dB granularity).

What's even more interesting, is that the record outs are controlled by a completely separate preamplification circuit. . . this means that you could even assign a Criterion input to drive an amp(s) in a separate room, which would enjoy a completely different musical program with a completely different volume.

On your specific question of compatibility with ML amp. . . Criterion's output impedance is only 60Ohms in both balanced and unbalanced mode. This means that Criterion is compatible with all but the most peculiar amps on the market. Unless your amp has an input impedance of less than 1200 Ohms, you will have no problems.

Saluti,

Guido

Guidocorona  (Threads | Answers | This Thread)


09-30-09   Brazcole, could you tell us was is better with your gamut d ...   Clavil

10-04-09   Speaking of gamut, they had one of the very best rooms at rm ...   Dcstep

10-05-09   I must echo dave's assessment of the gamut room, using their ...   Guidocorona

10-05-09   I will say, i agree with guido with preferring the va/rowlan ...   Dcstep

10-05-09   I was at soundings with guido and dave and agree that the 31 ...   Sarcher30

10-05-09   Sean, i was pleased that soundings was agreeable to switchin ...   Dcstep

10-06-09   Hi dave, i had a great time and was glad i met you guys. t ...   Sarcher30

10-06-09   could you tell which fm amp & preamp you have heard and how ...   Clavil

10-06-09   If i recall correctly, fm acoustics was showcasings its big ...   Guidocorona

10-06-09   Guido, i think that the fm was a huge stereo amp.   Dcstep

10-06-09   Guido and dcstep, the big stereo amp from fm acoustics is t ...   Clavil

10-06-09   Clavil my friend, the sound of the amp was very, very good, ...   Dcstep

10-08-09   Guido, i am trying to choose between the criterion, the dar ...   Husk01

10-08-09   And of course let us add those exceedingly fine gamut monobl ...   Guidocorona

10-08-09   Guido, i think husk01 is speaking of pre amps.....sounds lik ...   Kawika

10-08-09   Apologies husk. i inadvertently missed your post. unfortun ...   Guidocorona

10-09-09   I like the dartzeel very much! what's not to like? my only r ...   Kawika

10-09-09   David, i haven't heard the dartzeel, but have heard the crit ...   Dcstep

10-09-09   I am using a sooloos hd system going thru a berkely audio de ...   Husk01

10-10-09   Husk01, i can give you only a semi useful answer by indirect ...   Guidocorona

10-10-09   beyond cd....to hi-rez pcm or real hirez such as vinyl or r ...   Mikelavigne

10-10-09   Mike, a direct in-system dartzeel/criterion comparison for b ...   Guidocorona

10-10-09   Hi mike. glad to have you in on this. i'm fairly confident t ...   Kawika

10-10-09   David, glad to be here. my use of the word 'zeel' refers to ...   Mikelavigne

10-10-09   One interesting point is that at soundings hifi in denver, i ...   Guidocorona

10-10-09   Mike, at this point, criterion does not support bnc connect ...   Guidocorona

10-10-09   Isn't this glorious. we actually have an incredibly wide ran ...   Dcstep

10-10-09   Splendid idea dave. it may be worth while you creating a sep ...   Guidocorona

10-10-09   Guido, the whole 'zeel' interface involves not only the cabl ...   Mikelavigne

10-10-09   Mike, yes i read the dartzeal site and saw the 50ohm impedan ...   Guidocorona

10-14-09   Dave, when do you think you might be able to get to sounding ...   Kawika

10-19-09   Sorry kawika, but it'll be late november most likely. i was ...   Dcstep

10-22-09   You need to do a lot of things to get experience. i think al ...   Brazcole

10-26-09   Huh? what big ears you have said the wolf!   Kawika

11-21-09   I just try the jrdg powers cords. one first and then the ano ...   Brazcole

11-21-09   I have the impression that criterion may be quite insensitiv ...   Guidocorona


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