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B&K sonatas 200 monos

Hello my fellow audiogoners. I just purchased and received a good deal on a pair of B&K M200 sonatas. I was very shocked to hear the heft and considerable bass coming from these budget mono amps. I am using at the time a pair of 300ti soundynamics and the amps replaced an old amber series 70 amp that I still love and most likly will use in a second system or with a ht. I noticed it pumps out considerable bass without turning on my Rel Strata III sub. I was curious are any using them the B&Ks and have you made any changes as far as post, caps,and power cords that are captured on both units.Thanks to all and have a great day.
schipo
bdgregory
1,714 posts
 
I've had only one problem with the rocker switches. They are easy to replace, and cheap to buy though. I sent one of my pairs into B&K once to have them tuned up (it cost me $100 for the pair, plus shipping). They replace the rocker switches as a matter of process. It may be possible to find a better one, but it's not something I've considered a priority.
unsound
7,329 posts
 
I got to agree with previous posts. These amps are a steal on the used market. They can drive most low impedance speakers that would ordinarliy require more expensive amplification in such a way that belies their price. While they aren't quite up to the standards of the more expensive thorough breds, they are remarkably close. A word of caution, these DC coupled B&K's are a bit different than the other cap coupled B&K amps.
schipo OP
1,268 posts
 
A word of caution, these DC coupled? Can you please expand on your statement.
unsound
7,329 posts
 
Previous B&K amps like the legendary ST 140 were capacitor coupled the M 200's are DC coupled, basicaly just a different way of doing things for the same purpose. DC coupled designs are often reputed to have tighter bass response, which is the case with the M 200's. There are other differences as well. B&K historically was known for a warm, round sound, being a bit soft in the bass (especially into lower impedances)and foggy in the treble. The M 200's are a bit cooler, leaner, more defined overall and tighter in the bass region (especially into lower impedances).
gbr
10 posts
 
i have st-140 monos. i upgraded the power cords with VOLEX from ALLIED ELCTRONICS. they are Belden 14ga. wire with a shield for $11.00 to $15.00 ea.(length dependent). the best deal in audio power cords IMHO. i put overbraid on mine for a good looking cable.
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