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

[EddNog]

you listen to music at 55dB SPL? Isn't 60dB a quiet conversation?

Doesn’t seem that quiet to me. That is C-weighted so maybe that’s it?

-Ed

 

[babadono]

OK what is it calibrated against? Or do we care?

 

[EddNog]

OK what is it calibrated against? Or do we care?

No idea. This isn’t NASA-grade precision. Somebody asked, I made best efforts at zero cost to answer.

-Ed

 

[TOPPING]

Thank you for your initial assessment and the tip with the special version of the Carmen fantasy! Now it's time for @amirm to take a look at the devices. Topping has probably already sent him test devices and they are in the queue...

thw

Yes, B100s are in the queue.

 

[EddNog]

Yes, B100s are in the queue.

Can’t wait to see what the results are! I LOVE how my system sounds with the B100s driving my LS50 Metas! And they run nice and cool even when listening for hours!

-Ed

 

[EddNog]

Can you hear the difference though? Please say yes

@antcollinet already brought down my original response, but do note there's more to ownership experience than just sound. The build/materials quality on the B100 is noticeably higher than Fosi's (affecting important components like the speaker cable binding posts), and the B100 amps are running significantly cooler than any of the Fosi amps, particularly cooler running than the V3 Mono. These are things to factor. Additionally, you have much finer Gain control, which can be very important for system component matching. The V3 Mono completely lacks variable gain for Balanced input, and there's only two Gain options for Single-ended input. The ZA3 does it even worse by relying on an inexpensive volume attenuator ("pot"). As we have also seen, V3 Mono's automatic on/off function isn't particularly power-efficient. ZA3 offers 12V trigger just like B100, but again, you have the lack of PFFB on ZA3 and double signal conversion (for XLR users) due to the volume pot.

-Ed

 

[dhaman]

Does anyone have information on whether Topping is planning a stereo power amplifier like B100 but stereo ? On B100 amp topology ?

 

[EddNog]

Does anyone have information on whether Topping is planning a stereo power amplifier like B100 but stereo ? On B100 amp topology ?

Haven’t heard of it, but it’s definitely doable, as it basically exists already. The A70 Pro is where these amplifiers got their topology from, and it’s stereo. However, it is for headphones.

-Ed

 

[welwynnick]

Yes, B100s are in the queue.

Hello Topping, I'm looking forward to that.
The specs on your website are stunning, and over the last year I've come to trust your claims.
I assume, however, that all those great figures were taken in low gain?
Finding a good preamp to drive the required input level is difficult, to say the least.
Can you tell us how the B100 performs at medium gain?
Many thanks, Nick

 

[EddNog]

Hello Topping, I'm looking forward to that.
The specs on your website are stunning, and over the last year I've come to trust your claims.
I assume, however, that all those great figures were taken in low gain?
Finding a good preamp to drive the required input level is difficult, to say the least.
Can you tell us how the B100 performs at medium gain?
Many thanks, Nick

I would not be able to accurately ABX between Low and Medium Gain on my B100s once volume is matched via preamp. Medium Gain’s performance is transparent enough compared to Low Gain.

-Ed

 

[TOPPING]

Hello Topping, I'm looking forward to that.
The specs on your website are stunning, and over the last year I've come to trust your claims.
I assume, however, that all those great figures were taken in low gain?
Finding a good preamp to drive the required input level is difficult, to say the least.
Can you tell us how the B100 performs at medium gain?
Many thanks, Nick

Hi,

There is no difference in distortion performance, only in noise.

 

[welwynnick]

Great answer, many thanks

 

[JSmith]

Review is up of the B100;

Topping B100 Amplifier Review

This is a review and detailed measurements of the Topping B100 "monoblock" amplifier. It was sent to me by the company and costs US $299. I was surprised by the desktop/low profile of the amplifier. I expected something a lot taller/chunkier especially since this is a class B amplifier and not...

www.audiosciencereview.com

JSmith

 

[pavlo_y0l0s]

Quick calculation here:
200W into 4 ohms => sqrt( 200*4 ) = 28Vrms or 28/4 = 7 Amps
From above it is clear that power supply needs at least 7 amps of current to deliver 200w into 4 ohms load. It is worth mentioning this holds true for the sine wave signal. Music can probably get away with less amps…

 

[welwynnick]

It's a 100W amplifier.

 

[Rob_in]

It's a 100W amplifier.

Is it...?

 

[staticV3]

Is it...?

View attachment 392787

Yes, if you actually bother reading the context:

More power can be extracted by using finer steps in the input sweep voltage prior to protection circuit shutting down. So I suspect with out playing around you may be able to get there.

Smaller step size->100W without clipping:

 

[Rob_in]

***MAY*** be able to get there?

Where did the graph you share come from?

 

[welwynnick]

***MAY*** be able to get there?

Where did the graph you share come from?

That came from thd Topping website, which has long been shown to give reliable information.

 

[antcollinet]

***MAY*** be able to get there?

Where did the graph you share come from?

In any case, @welwynnick s post you quoted was replying to @pavlo_y0l0s s post which was assuming the amp was 200W. It was that assumption that was being corrected.

Also :