Jeff Rowland


Is there anyone that is familiar with Jeff Rowland amps that can tell me the difference between the 525 with a Capri 2 preamp compared to the Continuum S2 Integrated amp?
ricred1

Showing 17 responses by guidocorona

Hi Richard, I have listened at some length to Continuum S2 and Capri S2… And have heard comparative opinions of Continuum S2 with M525 from people that I respect who have considerable Rowland experience.

Continuum S2 is based on the Pascal M2Pro module, which is a higher end module than the S2Pro used in M525… And the audible results, for all that have listened to them, are quite in evidence… Continuum S2 is extremely textured and marvelously nuanced. By contrast, all comparative findings that I have heard from people in the know, is that M525, while excellent at its price point, might be a little more matter-of-fact and less emotionally involving than Continuum S2.

Continuum S2 delivers 400W with a peak current of 38 Amps…. It will drive anything you throw at it, except some uber-large speakers…. A pair of M525 bridged to mono ops might give you a smidjin more authority than Continuum S2…. At the cost of some subtlety and musicality.

Capri S2 and Continuum S2 share the same/identical preamplification circuit… There is no difference… And yes, Capri S2 is a wonderful preamplifier… I have heard it, and really like it. It is more textured and nuanced than the original, its bass is more complete, harmonically structured, and treble has greater delicacy than the original.

The question is rather.... If you have a single source... The Pricasti M1 DAC, you might not need a preamplifier at all. These days, if you have a really good DAC with high quality variable analog output, a preamplifier justifies itself mostly for system management in a system with a combination of digital and analog sources.

On the other hand, upgrading the power amplifier or adding a line stage are not the only way with which your system can enhance its performance very significantly. Yes, there are speakers of course, and then there is cabling, which can make a world of difference.... What wires and PCs are you using today?

Guido
Pleasure is all mine Richard... Reality is that audible beauty lies in the ears of the beholder... And I suspect that you and I might be hearing in ways that are not dissimilar.

Undeniably, someone else,, equally passionate about audio and music, might have prefered M525... Or the house sound of a totally different brand.

Guido
Hi Richard, seems to be an excellent plan to me. On the subject of line stage, adding a line stage between DAC and amplifier is not likely to increase resolution per se. On the other hand, it can do the following...

* if a hypothetical DAC were sounding a little hard fed direct into amps, linestage might be able to eliminate some of the treble intermodulation causing the hardness.

* In some cases, a linestage might add some authority, and macrodynamics to the analog output of the DAC.

* If a DAC signal could not be attenuated down to 0 with its volume control, a linestage would get you down to zero volume.

On the subject of cabling.... I am getting some startling results by applying a pair of High Fidelity CT-1 power cords to my system. I will be creating a thread in the next few days to describe my break-in findings. Stay tuned.

Saluti, Guido
Bombaywalla,

Yes you are correct, M525 would not be more inherently nuanced in bridged mode than in standard stereo mode. However, if in bridged mode each chassis is on a lower duty cycle for the Ariel speaker, it is quite possible that the end effect will be... One of enhanced nuance. I already know from eyewitness reports that M525 delivers markedly greater authority in bridged mode than in stereo mode.

From all reports I have heard, M525 do not degrade their performance in any way in bridged mode... That is why Rowland has decided to place an easy to flip selector switch in back of amp.

Rowland specs are extremely conservative and simply do not tell the whole story.... Yes, Rowland has applied M525 bridged to large lower impedance speakers with great results... Sorry I do not remember which ones.

This is not a tribunal... Richard need not justify his audiophilic cravings in front of us *grins!*

I for one am looking forward to hearing Richard's findings... I am following threads to learn more than anything else... Damm the specks... All steam ahead Richard! *Grins!*

FG.
Bombay walla, soliciting advice or options does not imply that the questioner has an obligation to heed such opinions, nor to explain his deviations from the above.

In the end, Richard's own findings in situ will add to the body of hard evidence-knowledge on this site one way or another.

G.
I believe that the just announced Rowland M625 S2 may cost approx $18K. Makes for significant planning impliccations. G.
Bombaywalla, your concerned about compatibility of 7Ts with M525 in bridged mode is addressed by the following fragment from Richard....

"I called Jeff Rowland several times and talked to them
regarding bridging the 525 to drive Aerial 7Ts. Per my
conversation with them, the 525 wouldn't have any problems.
I will follow-up on Monday to confirm bridged 525s can
drive the Aerial 7ts."

G.
"Take in consideration, not do it because they say so." ... My thinking's exactly Richard.... We can offer only data points... These may be applicable or not, or partially applicable, to your particular situation.

Hence my query: what made you opt for a second lovely M525 instead of going the Continuum S2 integrated route?

Congrats always! Guido
Hi Richard, yes you are right... I was missing the obvious... From Bricast M1, it's probably a good idea to go directly into an amp via balanced XLR connections. This would be sub-optimal from Continnuum S2, because its linestage bypass inputs are single ended RCA, while CS2 architecture is optimized for a fully balanced signal path.

Guido
Richard, if you ask the question above to Jeff, please explain that 7Ts speakers go down to a relatively reasonable 3 Ohms under normal conditions.... 1.5 Ohms may occur only in theory with a bridged amp... You do not want to lead Jeff to believe that your speakers dip normally to 1.5 Oh... Meaning a ghastly 0.75 Ohm from a bridged amp.

G.
And the other question that comes to mind is, considering the low impedance of 7Ts....

Ask Jeff... What can be a more efficient combination for your speakers.....

* A Rowland M625 V1) with a theoretical damping factor of 200 across the board and approx 20A of peak current;

* A pair of bridged M525s;

* A pair of M525S in vertical biamped configuration?

NOTE. M625 S2 has a completely different cost, so I am not considering it in the discussion.

Bombaywalla, yes, your post was absolutely wonderful... Tech credit is all yours. G.
Macro, here are list prices....

Capri Series II Stereo Preamplifier $3,950
Model 525 Stereo Power Amplifier $4,500
Continuum S2 integrated: $9500

Richard has indicated that he will be driving M525s directly from his Bricasti M1 DAC, sens line stage. G.
Congratulations Richard... Continuum S2 would have been my final choice as well! G.