Finally taking the leap to Monoblocks

Hi Argent; I'm in the process of going to McCormack DNA-2 bi-amps. I could have them converted to monos but those buggers put out an incredible 1200 wpc with the channels bridged.

BUT, both the DNA-0.5 and DNA-1's can be converted to monos by SMc Audio. If you found a pair of .5s they could be upgraded to level B or A and converted to monos. I'm looking into doing this with .5s (they put out 400 wpc bridged). Factory monos that I would consider are the Bryston 7Bs as you mention. And if I could afford it ($7K I think), I'd look hard at the new Classe' CAMs-- about 350 wpc. I like the looks of them, but haven't heard. Either STPH or TAS recently did a review of the Classe's. Good Hunting. Craig.

Just to throw a hornets' nest into the equation here, i have REAL problems with a big dollar SS monoblock that is rated for the same amount of power at 8 ohms that it is at 4 ohms. If i remember correctly, that's what the literature that i read about the big Bryston's stated. Please correct me if i'm wrong. Sean
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Sean, I think you might be wrong about the Bryston. You are referring to the 7B right? I think from the Bryston homepage it says 500 watts at 2 or 8 ohms, and 800 watts at 1 or 4 ohms. I think on the 7B you can have the output stage operate in series or parallel. One of these settings helps you to drive insanely low ohm speakers without tearing up the amp. If this analysis is not correct someone please enlighten me.

According to "theory", a SS amp should "double down" as impedance is halved. To reverse this, as impedance is doubled, power output would be cut in half. In English, a 500 wpc amp @ 8 ohms SHOULD be a 1000 wpc amp @ 4 ohms and 2000 wpc @ 2 ohms, etc... As you know, the vast majority of power amps come nowhere close to doing stuff like this. It takes a MASSIVE power supply, very rugged output devices, a LOT of heatsinking, etc.... to achieve results like this. That is why the "big monsters" like Krell's, etc... that DO achieve results like this are both BIG and EXPENSIVE.

If what you say about the Bryston's is true, they are using some type of output transformer between the transistors and the speakers. While Mac has done things like this in the past, it is rather unorthodox with modern design technology. To my way of thinking, it would typically result in reduced bandwidth and a loss in overall sonic quality as compared to a similarly built "direct drive" amplifier. Then again, there are ways around just about anything if someone has the time and money to do the necessary research. Then again, maybe having an output transformer with various impedance taps ( like a tube amp ) actually GAVE them the sonics that they wanted. I guess it is something to check into. Sean
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You just won't be able to get better sound for the money than buying a pair of BelCanto EVo 200.2 and mono blocking them (one button to push) Far more detail, resolution, timber, depth and extension than the Bryston's. You can find a pair NEW for less than 4K. 400 WPC mono. Killer value.