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Dirac and a Change of Amplifier.


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If following measurement the amplifier is changed for a different one, as in my case, does the measurement need to be done again? For example if the frequency response, or level of output at different frequencies across the board might be different with the change of amp, would this affect the readings, or is it only the room or speaker/placement that matters?

LOUNGE: Lab12 Gordian Power Conditioner>Qobuz Studio>TP-Link RE650 AC2600 WI-FI Extender>AfterDark Ethernet Cable EtherREGEN Special>EtherREGEN/Keces DC-116 PSU>AfterDark Ethernet Cable EtherREGEN Special>Lumin UI Mini Streamer/LEEDH volume/External PliXiR BDC Elite 12v 4amp Linear PSU>Oyaide DB-510 bnc/bnc Digital Cable>MHDTLabs Orchid DAC>Townshend DCT 300 RCA Interconnects>Amplifier Air Tight AMT-1S>Townshend Isolda EDCT Speaker Cables>Audium Comp 7 Passive Speakers>10x Ground Noise Isolators>Schumann Resonance generator RR-888.  Furutech fuse in each device.

LIVING ROOM:- Bluesound Node2 (as streamer only)/Vibradome Blue Star>Oyaide DB-510 bnc/bnc Digital Cable>iFi Retro 50/2. Furutech fuse/iFi LS3.5 Speakers>1x Ground Noise Isolator>Schumann Resonance generator. 

 

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The beauty of re-measuring is you can determine whether the new amplifier differs in this regard from the old one.
only if you can position the microphone in each and every run identically. I'd guess that such variation, even with extraordinary care, would swamp any differences among decent amps.

Kal Rubinson

Senior Contributing Editor, Stereophile

 

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Thanks everybody for your advices. The consensus is that I should re measure, and that is what I will do. I reckoned I wouldn't be happy until I did it again unless the consensus was totally in the opposite.

 

I will wait a while as there is only 50 hours on the amp and AMR say upto 300-500 hours for it to settle fully, and I am playing with coupling and/or isolation of the entire system also as things progress.

 

All that said the existing filter seems to be doing its job following the amplifier switch, but who knows there might be some differences, even if subtle, when done again.

 

Like Kal said maybe any such differences might be down to relatively small changes in mic positions between the two measurements. In any event I will post the results when done, which might be of interest.

LOUNGE: Lab12 Gordian Power Conditioner>Qobuz Studio>TP-Link RE650 AC2600 WI-FI Extender>AfterDark Ethernet Cable EtherREGEN Special>EtherREGEN/Keces DC-116 PSU>AfterDark Ethernet Cable EtherREGEN Special>Lumin UI Mini Streamer/LEEDH volume/External PliXiR BDC Elite 12v 4amp Linear PSU>Oyaide DB-510 bnc/bnc Digital Cable>MHDTLabs Orchid DAC>Townshend DCT 300 RCA Interconnects>Amplifier Air Tight AMT-1S>Townshend Isolda EDCT Speaker Cables>Audium Comp 7 Passive Speakers>10x Ground Noise Isolators>Schumann Resonance generator RR-888.  Furutech fuse in each device.

LIVING ROOM:- Bluesound Node2 (as streamer only)/Vibradome Blue Star>Oyaide DB-510 bnc/bnc Digital Cable>iFi Retro 50/2. Furutech fuse/iFi LS3.5 Speakers>1x Ground Noise Isolator>Schumann Resonance generator. 

 

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