Jeff Rowland


I recently replaced my Parasound A21 with a JR M525. It has taken my system to new levels: soundstaging, spacing between instruments, tonality, and a natural midrange. The M525 is the first amp I've ever owned that presents a 3 dimensional soundstage. All that being said, now I wonder what improvements going from the M525 to the JR S2 integrated or bridged M525s will yield? Is it a night and day difference? Are bridged M525 better than the S2? My system: Aerial 7Ts, PS Audio DirectStream DAC, Bryston BDP-2, and all Wireworld Silver 7 cables.
ricred1
Al,
Thanks for the technical information. Now it makes sense why Rowland was hesitant to say for sure bridged 525s would work.
Al is right (as usual). This amp most likely uses PASCAL S-PRO2 class D modules. Data sheet shows minimum load of 2 ohms or 4 ohms when bridged. Bridging might create problems with your speakers gaining only about 20% of loudness. Not worth trying IMHO.

http://www.pascal-audio.com/downloads/S-PRO2_Datasheet-1_20.pdf
Hello Al, Ricred, Kijanki, and all,

After reading this thread, it has led me to question my intention of using a second Class D CDA 254 amplifier, thus allowing me to use the two of them in bridged mode as monoblocs.

My speakers are of course different, they being Tannoy HPD 315's, 94 db sensitivity and 8 ohms. I don't know if you can draw any conclusions without specific test results, which in any case, wouldn't be available.

My particular application of these drivers are in custom 150 liter bass-reflex enclosures.

I have written to Tom, at Class D Audio, about this, but the expertise available here is without peer.

I'll be thankful for any information that can be provided.

My apologies to Ricred for hi-jacking his thread.

Regards,
Dan