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:
http://jeffrowland.com/Criterion.htm
And here’s the front view:
http://jeffrowland.com/Criterion-front.htm
And here’s the rear view:
http://jeffrowland.com/Criterion-back.htm

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
Dave, if you fear you may develop a new case of 'insurmountable need', we should consider an in depth counselling session in front of a bottle of Barolo next month. G
Yes, by Friday night I'll probably be head over heels. I look into the Barolo, but if that's not available the Querceto Reserva Classico is amazing. I think we'll need more than one bottle...
Looks very good. 18K is a bit much though. 9K ....maybe.

Anyway - looking forward to compare it to my RWA Isabella.
I just hope that- it is that much better.....until then, Dodd and RWA Isabella are IMHO one of the best values. No....not cheap, but if getting off the grid, simplicity and sound quality are your goals, it might be worthy investment.

Mariusz
The proof is in the listening, but generally speaking series-connected NiMH batteries are a poor choice for SOTA. They have up to several ohms of impedance, as compared to several milliohms for large SLA batteries. You can hear these differences, though adding massive capacitance may ameliorate the situation somewhat.

Why would a designer choose NiMH over SLA? Convenience, ROHS issues concerning lead content, gassing issues, transportation issues. But not for SOTA.