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Class D Switching Power Amplifiers and Power D/A conversion

The New Hypex Fusion Plate amps
The New Hypex Fusion Plate amps
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Old 19th October 2018, 04:13 PM   #1051
triode_al is offline triode_al  Netherlands
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Join Date: May 2004
Location: Westland
Quote:
Originally Posted by jarkaa View Post
Just received a pair of FA122 amps.

On both modules automatic start with signal detection does not work.

When modules are switched off from the mains the presets disappear.

I have been waiting for response from hypex for a week now.

Other fusionamps are exhibiting also various other problems. Company has released products without proper testing and a lot of quality problems.
I had this too, intermittent start-up timing.
I then figured out it has to do with the fact I have a 1x buffer after the volume. The whole gain architecture has to be taken into account. My main speaker is 97 dB.
  • For the coupling to the Hypex I made a special 20 dB line out amplifier, and now the units starts up perfectly. Yes, I see it clips when loud but I never go that loud.
  • . . and now it starts perfectly, no problem.
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SPU --> tube MC/RIAA;
Pass buffer -->300B SE + DN2540 CCS/Buffer; --> 165GMF in TQWT; working on a HYPEXed sub.
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Old Yesterday, 10:52 AM   #1052
powerman is offline powerman  South Korea
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Join Date: Jun 2005
Location: SK
Quote:
Originally Posted by jarkaa View Post
Just received a pair of FA122 amps.

On both modules automatic start with signal detection does not work.

When modules are switched off from the mains the presets disappear.

I have been waiting for response from hypex for a week now.

Other fusionamps are exhibiting also various other problems. Company has released products without proper testing and a lot of quality
l used drum track to trigger the plateamp!

Last edited by powerman; Yesterday at 10:55 AM.
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Old Yesterday, 01:11 PM   #1053
ottjan is offline ottjan
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Join Date: May 2016
One of my two FA122 modules is defective. Both has the same settings and both are masters. I tried all volumes and inputs, but one module still donīt have output signal.
I will send one module back to repair. Support is corresponds within one week of sending, so slow work with them.

I canīt recommend them
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Old Yesterday, 02:07 PM   #1054
ottjan is offline ottjan
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Join Date: May 2016
problem solved: It looks like you have not uploaded any filters since the DSP filename field is blank.
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Old Today, 02:06 AM   #1055
powerman is offline powerman  South Korea
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Join Date: Jun 2005
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Originally Posted by ottjan View Post
problem solved: It looks like you have not uploaded any filters since the DSP filename field is blank.
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Old Today, 08:49 AM   #1056
ottjan is offline ottjan
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Join Date: May 2016
now is all right, sorry. Support is responding fast
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