[alexone]

James,
what is the technical explaination for a Bryston class d designed amp? what/where is the 'digital' part of these amps and how does it works?


al.

[James Tanner]

Hi Alex,

They are basically switching amplifiers.

There are two categories:

1. Analog - controlled Class D.
Switching amplifiers with an analog input signal and an analog control system. Normally some degree of feedback error correction is present.

2. Digitally controlled Class D.
Amplifiers with a digitally generated control that switches a power stage. No error control is present. Those that do have an error control can be shown to be topologically equivalent to an analog controlled class D with a DAC in front.

james

[alexone]

James,
regarding the two categories you mentioned which is which of Bryston's class d amps?

thanks,

al.

[bummrush]

god almighty,you guys dont really make switching amps do you?

[James Tanner]

James,
regarding the two categories you mentioned which is which of Bryston's class d amps?

thanks,

al.

Hi Al,

Number 1 for a lot of good reasons.  By the way our switching amps are only being introduced for commercial Zone applications. There will be an 8 channel 130 watt unit and an 8 channel 250 watt unit to start.

We will be using linear power suppllies as well rather than switching supplies. Here are some features:

Bryston Class D Advantages

1 Operates on a split power supply, no floating DC on the outputs.
2 Not load dependent.
3 Extremely low noise.
4 No stability problems when not connected to loads.
5 Highly efficient - in the 90% range at full power.
6 Environmentally 'green'
7 Lower RFI/EMI due to careful module design,
8 A quality linear Bryston power supply.
9 Protection includes current limiting and over voltage protection.
10 Low output impedance.
11 Short circuit protection.

james

[rmurray]

Well Twich 54 , what  do you think ok of this ?

[bummrush]

Thanks for writing,i just hear the words class d ,switching amps and my mind starts to do funny things, once again the proof is in the listening and you're ears and knowledge at Bryston cant help but do any good with whatever you guys design.