Bryston Class D Amplifiers

[AcuDefTechGuy]

Is this a Bryston design or a repackaged Axiom which I tested years ago:

Axiom Audio A1400-8 Digital Multi-Channel Amplifier Review

Axiom Audio has redefined performance expectations of Class D amplifiers with their A1400-8. Sporting 200 watts per channel all channels driver, this amp is a real space saver.

www.audioholics.com

No, it is a different amp. The Axiom had a switching power supply and had up to 8 channels.

The new BD-325 has up to a maximum of 5Ch, has a different circuit board and is a hybrid design with a linear power supply at the front end and Class D output stages.

The Bryston BD-325 also has a 20 Year Parts & Labor Warranty.

 

[flyboylr45]

How long does it take to test an amplifier? I mean, I’m in Orlando and Gene is in Tampa…

 

[PENG]

No, it is a different amp. The Axiom had a switching power supply and had up to 8 channels.

From what I can see, the Axiom Gene tested has a linear supply, see that reasonably big power transformer?:

 

[AcuDefTechGuy]

From what I can see, the Axiom Gene tested has a linear supply, see that reasonably big power transformer?:

View attachment 75419

Gene wrote:
“The Axiom A1400-8 is a Class D switching amplifier” so that’s why I thought it had a switching power supply.

So kudos to Axiom for using a giant power supply even back in 2009.

Since Bryston and Axiom are owned by the same two Canadians (James Tanner & Ian Colqhhoun), I think it’s safe to say that Bryston took the original Axiom A1400 design and improved on it a few times since 2009 to get even better measurements now in 2025 befitting the 20YR warranty and Bryston’s 63 year reputation.

 

[PENG]

Gene wrote:
“The Axiom A1400-8 is a Class D switching amplifier” so that’s why I thought it had a switching power supply.

So kudos to Axiom for using a giant power supply even back in 2009.

Since Bryston and Axiom are owned by the same two Canadians (James Tanner & Ian Colqhhoun), I think it’s safe to say that Bryston took the original Axiom A1400 design and improved on it a few times since 2009 to get even better measurements now in 2025 befitting the 20YR warranty and Bryston’s 63 year reputation.

Yeah class D amps are switching amps too lol..so it can be switching ps + ab amp modules, or linear ps + switching amps or switching ps + switching amps.

 

[AcuDefTechGuy]

Yeah class D amps are switching amps too lol..so it can be switching ps + ab amp modules, or linear ps + switching amps or switching ps + switching amps.

So types of amps:

1. Linear Amp + Switching Power supply (Benchmark Class H Amp)
2. Linear Amp + Linear Power supply (ATI and Bryston Class A/B amp)
3. Switching Amp + Switching Power supply (Buckeye Class D amp)
4. Switching Amp + Linear Power Supply (ATI and Bryston Class D amp)

 

[Verdinut]

So types of amps:

1. Linear Amp + Switching Power supply (Benchmark Class H Amp)
2. Linear Amp + Linear Power supply (ATI and Bryston Class A/B amp)
3. Switching Amp + Switching Power supply (Buckeye Class D amp)
4. Switching Amp + Linear Power Supply (ATI and Bryston Class D amp)

And there are linear amps + switching power supply (QSC DCA Series - Both Class A/B and Class H since 1998):

https://www.qscaudio.com/resource-files/productresources/amp/dca/q_amp_dca_2ch_specs.pdf