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Making further progress, TOPPING’s new flagship amplifier will be launched in late May!

I tried replying to the post that was talking about b200 amp

ok, for 100w
100W into 4 ohms => sqrt( 100*4 ) = 20Vrms or 20/4 = 5 Amps
 
I tried replying to the post that was talking about b200 amp

ok, for 100w
100W into 4 ohms => sqrt( 100*4 ) = 20Vrms or 20/4 = 5 Amps
If you are not replying to the post directly above yours, then you need to quote the one you are replying to (click the reply link, or select relevant part of the text and click the reply button that pops up) otherwise no-one can tell what you are referring to.
 
Thats garbage lol, never seen other manufacturers quote their figures from such a low wattage. It is normally done at 1Khz @ rated power and weighting which is putting your thumb on the scales also lol.

Mcintosh of all companies lies through their ass constantly and don’t remotely resemble what the company was back in the day.

A lot of older power amps struggle with distortion at such low power figures. Even 1W can be difficult due to noise floor etc. I agree that 5W isn’t industry standard but more relevant for the real world than rating distortion at max power.
Just a couple of samples that show that McIntosh is pretty upfront and conservative with their ratings and are within the realm of honesty. I know little about their tube gear, but their SS gear is on point and the amps supply plenty of headroom.
 
I noticed a pattern in the specs. There are several different noise figures (sic) for mono/stereo, high/low gain, B200/LA90, but there's a strange consistency between them.

Take any gain figure in dB, divide by 5.5, and you get very close to the noise in uV - and that's the same for both amps.
When the B100 came out, I wondered if that continued the pattern in performance. I've been meaning to make this post for ages and finally got the time.
I charted all the best power amps, but it was difficult to see correlations, partly because Topping were so far ahead of everyone else.

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I focussed on Topping amps, and tried to use ASR data, but it wasn't as complete as the Topping specs which I used instead. I used output voltage and AP measured noise to calculate the SNR .

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The suffix after the model number is the approximate gain in that particular condition.

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There's a good correlation between all amps - LA90, B100 & B200. Reducing the gain by 10dB typically improves SNR by around 5dB, and that's where the B100's 151dB SNR comes from. Unfortunately the gain has to come from somewhere, and it will have to paid by the preamp performance instead.

I think all this makes the B200 look very good. Topping claim 200W for both 8 and 4 ohms, but the latter is probably closer to 300W going by the similarities with the LA90 bridged, and Amir's test of the LA90 bridged , and it goes off the scale on Topping's chart.

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My review...they sound wonderful :)
Tell us more! I m also interested to buy b200. From wich amp you made upgrade? I have topping pa7 class d with kef r3 meta. I want to try this class ab monoblocks with more power
 
I use them to drive the LF section of my Klipsch Jubilees...previously used a Crown K2 (way power overkill) a Crown D75(in bridge, refurbished by me) and a Boulder 500. These B200s just fill the bill perfectly. The mids and tweets are handled by 4 Topping LA90 Ds in bridge. The volume controls on LA90s come in handy to match the mid and highs to the woofers. The Crown K2 is relegated to subwoofer duty which it excels at. The D75s are now used to drive surrounds in the HT. The Boulder has been freed up to serve in a secondary living room system.
 
I posted pics in the LA90 thread
 
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