Rowlands


Not much talk about Rowland. Why is that? For example, Pass is all over the place.
inna
Zabiaud, Rowland newest M625 clas a/b amp, as well as ICEpower-based amps in the 300 series like M312, M301, and the older M302 have a special current rectification system based on a technology called active Power Factor Rectification (PFC). This gives them a very significant amount of advantage in overall musical subtlety of the output, compared to M501 and M201. There exists an external PFC-based rectifier by Rowland called PC-1 that can be applied to M501 and M201.... and should bring those amps closer to the performance of the higher end ICEpower based 300 series.

Model 7 is a 25 year old class a/b design..... It is very sweet and has an enormous power reserve, but has neither the transparency nor the musical resolution of newer Rowland amplifiers.

Hope this helps.

Guido
I have a 625. Most people can't or don't want to believe how much better this amp is than ANYTHING Jeff has ever built before. Yes the 8 & 9 amps will swing more current, but holly smokes is this thing way way great!With the right cabling and source components.....It is super transparent, quiet and has that elusive quality most solid state amps can't recreate. Images with mass ans precise outlines. His phase correctness must be spot on tho achieve the sort of imaging you hear from this amp. If you have inefficient speakers, you'll want his M725 or also yet to be released, M925 mono amps.I have a Rowland Criterion as my pre-amp.Silent Source cables (except for speaker)
Just returned from RMAF. Rowland M725 were not shown. However, I have learned that M725 will not be bridgeable amps, but will operate as pure monoblocks. The power rating has not been announced.
My 2 cents on JRDG customer service.....it kinda sucks. I left many voice mails and emails over the last couple of years. Once I recd a call back. It's a small operation and direct customer support is not Jeff's priority. IF you find a long time retailer, you'll be in good hands because these guys are on the "inside track" into the company. Otherwise, don't hold your breath for support from JRDG.
with a weak economy and somewhat expensive gear (comparatively) i would imagine that their ability and/or willingness to answer a lot of questions is limited. if they could sell a bunch of their amps and pre's based on word of mouth and their pretty new web site (i don't like the lack of information about older equipment however) they might hire a pleasant voiced person to field questions in the future.
the dealer in my area is somewhat aloof and has been for years. but every time i used to go there i heard glorious MUSIC. and along with that i get the "do you have enough money to buy this?" treatment. Sucks, but what can you do?
send Jeff a handwritten letter and tell him you like his gear but can't seem to get information and/or the kind of service you really need. but understand
this company caters specifically to the "ONE PERCENT" if you know what i mean...
Gents, there exists a remarkably detailed and growing amount of operational information on Rowland products stored on the JRDG Knoledge Base at:
http://jeffrowlandgroup.com/kb/
I consult the knowledge base when I have any questions about JRDG products, before attempting anything else... and in most cases, I find a ready answer posted there. G.
Opposite to Jymc I have personally had 2 very positives experiences with Jeff Rowland's customer service:
1) they replaced me free of charge the control remote which falling on the floor was damaged
2) Jeff Rowland answered me personally an email with question about seeing up my system

concerning the 725 it has been just showed in Japan with Avalon Time
have a look here
>http://cybwiz.blogspot.com/2011/11/jeff-rowland-725-with-avalon-speakers.html
I believe that the M725 pair shown at the Osaka show consisted of operational prototypes... Which means that they were sonically active, but were not yet production-level devices. G.
Just heard from JRDG.... M725 monos have been released and are shipping. US price is approximately $28K. Production level units should be listenable at CES 2012. G.
Complete M725 monoblock amp features and specs have been posted to the Rowland Knowledge base at:

http://jeffrowlandgroup.com/kb/quest...questionid=592

Summarizing....

* Ceramic circuit boards.
* Composite class A/B circuit with separate gain stages for voltage and current, no overall feedback.
* Balanced from input to output.
* Copper Bus bars.
* Surface mounted componentry.
* Transformer coupled I/O.
* SMPS prefixed by 1500W PFC unit.
* Parallel binding posts for bi-wiring.
* Power: 330W at 8 Ohms, 650 at 4 Ohms.
* Input Impedance: 40K Ohms.
* Damping factor: 200.
* Common mode rejection ratio: 90dB
* Inputs: Balanced XLR.
* Power consumption idle: 85W.
* Power consumption standby: 1W.
* Weight: 54 Lbs each.

Guido
I've been using Rowland for my preamp and phono stages for 8 years now. A Synergy IIi and a Cadence phonostage.

The last two years I have been upticking the system and now have the Classe Cam 600's, the new B & W 802 Diamonds and a heavily modified VPI Aries and Sony 5400 SACD player with all the VSE mods you can throw at it. Cardas golden reference for the cables.

Pretty damn good system. But still maybe (and somewhat hard to believe) just a bit polite.

Enter the Rowland Criterion to replace the Synergy. Really amazing. Dynamics both large and small. Huge and deep soundstage. Deep controlled bass. The B&W's sparkle when the recording so provides and rock it when that's what fed. And I keep coming back to the dynamics. Not the polite Rowland sound I associate with my Synergy. Also, the Synergy was always mercilessly revealing. The Criterion keeps it musical regardless of what you feed it.

I am very very satisfied. Good for 8 more years.
i own a pair of 201 monoblocks and synergy IIi pre driving vienna acoustics mahlers. absolutely love the rowland gear. i've always received superb service from jrdg. i recently contacted them in the past two weeks via email and each time someone responded the same day or the next day. i had similar experiences in all previous contacts over the years.

jeff rowland, the man, is bit eccentric -combination scientist and artist. he definitely does not play the politics of magazine reviewers. he thinks most of them are idiots and prostitutes. he's probably right. so, you'll find more reviews of his products in overseas publications in asia and europe. from what i know from my dealer and other indirect interactions with jeff -his factory is 45 minutes away from me- jrdg sells more product in asia than anywhere else including the usa. jeff doesn't always make decisions based on business logic. e.g., though few probably know it, his model 201 and 501 amps were probably his best selling products ever and he discontinued them at the height of their popularity! why?? "because it was time for a change". really?? that's jeff. he refuses to compromise integrity for profit. if jrdg invested more on marketing and played the politics, he could sell more product. he's a wonderful unassuming human being. he personally delivered my synergy IIi to my local retailer -pretty humble. he takes a zen approach to life that i think comes through in the design of his products -timelessly sophisticated and simultaneously simple. always musical and easy on the eyes. you will struggle to find the slight hint of harshness in any jrdg product. a wholistic approach to design. jeff abhors grain and harshness. it's about more than technology. his products perform their duty with little fanfare and draw no attention to themselves. they simply get out of the way of the music without doing any harm and for many that's not very exciting. there's nothing to discuss. no signature. boring for some. works for me.

also, i expect that jrdg gear attracts a certain kind of music lover. i find it likely that a higher percentage of jrdg owners enjoy music first and fiddling with the gear second. personally, i have little desire to own anything else. from my dealer, i know that a lot of the sales of 201 and 501 amps went to music lovers who have never heard of audiogon or stereophile.

recently, i sought a phono stage and have found it a challenge to overlook the aesthestics of most all the items that i've considered. so, now i'd like to find a jrdg cadence phono stage -ideally with a separate power supply. so, if anyone wants to part with a cadence phono stage or know someone with one collecting dust, i'll buy it. seriously. as you've gathered, i'm jrdg fan -both of the company and the man.

finally, since jrdg gear tend to be utterly transparent, changes to the peripherals become apparent. i.e., you will hear your speaker cables and interconnects. you will clearly hear the differences in isolation and vibration applications to your turntable or cd player -at least i do. i run all analysis plus solo crystals throughout for speaker cables and ICs and i've have been super pleased with the sound -detailed, revealing, musical, devoid of harshness, sweet, open, dynamic, extended from top to bottom -four 10" woofers on mahlers help. the setup invites me to listen to music for hours. only area that i could use improvement is probably low bass definition. i expect a cadence phono stage will resolve this perception. btw, anyone criticizing the model 201 or 501 class d amps has probably never listened to them. find someone who owns a pair and ask their opinion. this is the typical outcome after one listens to them: http://is.gd/qlcsS8.

ok, enough rambling. be joy!
Allhaildawg

If you don't already have them, try to hear the JR PFC1 with your 201 ...

I have the 501, the day I tried them I couldn't believe it
All, it looks like the new Rowland M925 monoblock amp will be shown making music at CES 2013. Hopefully it will also be released soon. So I have created a thread dedicated to M925. Here is the URL:
http://forum.audiogon.com/cgi-bin/fr.pl?aamps&1356478534&openusid&zzGuidocorona&4&&

See you there! Guido