Do Mono Block amps provide better sound ??

Roscoeiii, the size of the amp is not important in this conversation- the benefits are the same. Price certainly has a lot to do with it too. You have an extra chassis, and certainly the need for more power transformers. These can be some of the most expensive parts in the amp.

In the S-30, the filament transformer is shared between the two channels. The B+ transformer has separate windings for each channel. In the driver supply, there are separate power supply legs for each channel. Since the driver is fully differential, it has fairly constant power draw on it, but even so we found it better sounding by having separate legs in the power supply.

Had we built the amp on separate chassis, it would have cost nearly as much as the M-60.

for example the krell evo 302 has a 3000 VA transformer
{http://www.krellonline.com/evolution302.html}

The krell i have at the moment has 4000 VA per channel 8000 VA in total while its only 100 watts more , that was the main reason i bought it over a ML 436 which has much less .
Thats why krell monos are animals .
Oh and 1 thing i forgot a big powersupply has a lot to do with good basperformance ,another reason to go mono.

There is a clear cut difference as to why in theory dual monoblocks have an advantage unless of course the stereo amp is a dual monophonic design. Depending on the circuit design, stereo amps which use the same power supply for both channels is at a disadvantage. Power supplies can be taxed by the circuit it's feeding and this is multiplied by having it power a second channel. Usually, the sonic attributes of a using two monoblocks include a greater sense of depth, better inter-transient silence ( blackness around instruments in space), greater detail within that space, better sense of stage, and increased transient performance. In addition, an improvement might also be heard by powering each monoblock amp from a separate electrical circuit. This offers better isolation from channels

All else being equal, yes.

Thanks to all who have responded!!! I have been schooled in the pro and cons of monoblocks and single stereo amps. Cheers!!!!!!! Jim