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Hypex Nilai DIY500 Stereo Modifications

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    • March 25, 2025 at 1:27 pm #207720
      Mark DawsonMark Dawson
      Participant

      <span style=”color: #1b1e23; font-family: -apple-system, BlinkMacSystemFont, ‘Segoe UI’, Roboto, Helvetica, Arial, sans-serif, ‘Apple Color Emoji’, ‘Segoe UI Emoji’, ‘Segoe UI Symbol’; font-size: 15px;”> My first modification was installing a second PSU into my Hypex Nilai DIY500 Stereo amp to double the power output into 4 ohms.</span><br style=”box-sizing: border-box; margin-top: 0px; color: #1b1e23; font-family: -apple-system, BlinkMacSystemFont, ‘Segoe UI’, Roboto, Helvetica, Arial, sans-serif, ‘Apple Color Emoji’, ‘Segoe UI Emoji’, ‘Segoe UI Symbol’; font-size: 15px;” /><span style=”color: #1b1e23; font-family: -apple-system, BlinkMacSystemFont, ‘Segoe UI’, Roboto, Helvetica, Arial, sans-serif, ‘Apple Color Emoji’, ‘Segoe UI Emoji’, ‘Segoe UI Symbol’; font-size: 15px;”>I disassembled the amp, drilled 14 new PSU mounting holes and five large holes to fit some metal Temu air vents. The additional PSU is supplied with two amplifier connection cables (not required), a power input cable and a 12 pin auxiliaries cable (J5).</span><br style=”box-sizing: border-box; color: #1b1e23; font-family: -apple-system, BlinkMacSystemFont, ‘Segoe UI’, Roboto, Helvetica, Arial, sans-serif, ‘Apple Color Emoji’, ‘Segoe UI Emoji’, ‘Segoe UI Symbol’; font-size: 15px;” /><span style=”color: #1b1e23; font-family: -apple-system, BlinkMacSystemFont, ‘Segoe UI’, Roboto, Helvetica, Arial, sans-serif, ‘Apple Color Emoji’, ‘Segoe UI Emoji’, ‘Segoe UI Symbol’; font-size: 15px;”>I soldered the power input cable to daisy chain it with the original power input cable.</span><br style=”box-sizing: border-box; color: #1b1e23; font-family: -apple-system, BlinkMacSystemFont, ‘Segoe UI’, Roboto, Helvetica, Arial, sans-serif, ‘Apple Color Emoji’, ‘Segoe UI Emoji’, ‘Segoe UI Symbol’; font-size: 15px;” /><span style=”color: #1b1e23; font-family: -apple-system, BlinkMacSystemFont, ‘Segoe UI’, Roboto, Helvetica, Arial, sans-serif, ‘Apple Color Emoji’, ‘Segoe UI Emoji’, ‘Segoe UI Symbol’; font-size: 15px;”>I also soldered five wires on the 12 pin auxiliaries cable to the original 12 pin cable. This required carefully removing some of the insulation from the original cable, soldering the ends of the new cable onto the original and then insulating with electrical tape. The five wires I connected were:</span><br style=”box-sizing: border-box; color: #1b1e23; font-family: -apple-system, BlinkMacSystemFont, ‘Segoe UI’, Roboto, Helvetica, Arial, sans-serif, ‘Apple Color Emoji’, ‘Segoe UI Emoji’, ‘Segoe UI Symbol’; font-size: 15px;” /><span style=”color: #1b1e23; font-family: -apple-system, BlinkMacSystemFont, ‘Segoe UI’, Roboto, Helvetica, Arial, sans-serif, ‘Apple Color Emoji’, ‘Segoe UI Emoji’, ‘Segoe UI Symbol’; font-size: 15px;”>Pin 2: Ground</span><br style=”box-sizing: border-box; color: #1b1e23; font-family: -apple-system, BlinkMacSystemFont, ‘Segoe UI’, Roboto, Helvetica, Arial, sans-serif, ‘Apple Color Emoji’, ‘Segoe UI Emoji’, ‘Segoe UI Symbol’; font-size: 15px;” /><span style=”color: #1b1e23; font-family: -apple-system, BlinkMacSystemFont, ‘Segoe UI’, Roboto, Helvetica, Arial, sans-serif, ‘Apple Color Emoji’, ‘Segoe UI Emoji’, ‘Segoe UI Symbol’; font-size: 15px;”>Pin 7: Pushbutton+</span><br style=”box-sizing: border-box; color: #1b1e23; font-family: -apple-system, BlinkMacSystemFont, ‘Segoe UI’, Roboto, Helvetica, Arial, sans-serif, ‘Apple Color Emoji’, ‘Segoe UI Emoji’, ‘Segoe UI Symbol’; font-size: 15px;” /><span style=”color: #1b1e23; font-family: -apple-system, BlinkMacSystemFont, ‘Segoe UI’, Roboto, Helvetica, Arial, sans-serif, ‘Apple Color Emoji’, ‘Segoe UI Emoji’, ‘Segoe UI Symbol’; font-size: 15px;”>Pin 8: Pushbutton-</span><br style=”box-sizing: border-box; color: #1b1e23; font-family: -apple-system, BlinkMacSystemFont, ‘Segoe UI’, Roboto, Helvetica, Arial, sans-serif, ‘Apple Color Emoji’, ‘Segoe UI Emoji’, ‘Segoe UI Symbol’; font-size: 15px;” /><span style=”color: #1b1e23; font-family: -apple-system, BlinkMacSystemFont, ‘Segoe UI’, Roboto, Helvetica, Arial, sans-serif, ‘Apple Color Emoji’, ‘Segoe UI Emoji’, ‘Segoe UI Symbol’; font-size: 15px;”>Pin 9: Trigger+/-</span><br style=”box-sizing: border-box; color: #1b1e23; font-family: -apple-system, BlinkMacSystemFont, ‘Segoe UI’, Roboto, Helvetica, Arial, sans-serif, ‘Apple Color Emoji’, ‘Segoe UI Emoji’, ‘Segoe UI Symbol’; font-size: 15px;” /><span style=”color: #1b1e23; font-family: -apple-system, BlinkMacSystemFont, ‘Segoe UI’, Roboto, Helvetica, Arial, sans-serif, ‘Apple Color Emoji’, ‘Segoe UI Emoji’, ‘Segoe UI Symbol’; font-size: 15px;”>Pin 10: Trigger +/-</span><br style=”box-sizing: border-box; color: #1b1e23; font-family: -apple-system, BlinkMacSystemFont, ‘Segoe UI’, Roboto, Helvetica, Arial, sans-serif, ‘Apple Color Emoji’, ‘Segoe UI Emoji’, ‘Segoe UI Symbol’; font-size: 15px;” /><span style=”color: #1b1e23; font-family: -apple-system, BlinkMacSystemFont, ‘Segoe UI’, Roboto, Helvetica, Arial, sans-serif, ‘Apple Color Emoji’, ‘Segoe UI Emoji’, ‘Segoe UI Symbol’; font-size: 15px;”>The end result sounds slightly better than with a single PSU IMO. The extra headroom seems to have given the bass more weight behind it and added to the overall clarity at louder volume.
      Nilai will two PSUs
      Case underside
      My second modification was </span><span style=”color: #1b1e23; font-family: -apple-system, BlinkMacSystemFont, ‘Segoe UI’, Roboto, Helvetica, Arial, sans-serif, ‘Apple Color Emoji’, ‘Segoe UI Emoji’, ‘Segoe UI Symbol’; font-size: 15px;”>adding a gain switch (on-off-on 6 pin) to the rear panel. Seems to work and can be easily reversed if it has any negative effect on the sound.
      Gain switch wiring
      </span>

      Nilai gain switch

    • April 19, 2025 at 3:17 pm #213020
      MarcMarc
      Participant

      Cleaned the HTML so it is readable:

      My first modification was installing a second PSU into my Hypex Nilai DIY500 Stereo amp to double the power output into 4 ohms. I disassembled the amp, drilled 14 new PSU mounting holes and five large holes to fit some metal Temu air vents. The additional PSU is supplied with two amplifier connection cables (not required), a power input cable and a 12-pin auxiliaries cable (J5).

      I soldered the power input cable to daisy chain it with the original power input cable.

      I also soldered five wires on the 12-pin auxiliaries cable to the original 12-pin cable. This required carefully removing some of the insulation from the original cable, soldering the ends of the new cable onto the original, and then insulating with electrical tape. The five wires I connected were:

      • Pin 2: Ground
      • Pin 7: Pushbutton+
      • Pin 8: Pushbutton-
      • Pin 9: Trigger+/-
      • Pin 10: Trigger+/-

      The end result sounds slightly better than with a single PSU, in my opinion. The extra headroom seems to have given the bass more weight behind it and added to the overall clarity at louder volume. Nilai with two PSUs. Case underside.

      My second modification was adding a gain switch (on-off-on 6-pin) to the rear panel. It seems to work and can be easily reversed if it has any negative effect on the sound.

       

    • April 19, 2025 at 3:19 pm #213021
      MarcMarc
      Participant

      I have the mono blocks, so no need. But have you considered upgrading the fuses at the power inlets? Should be an easy upgrade with potentially a lot of improvement.

    • April 19, 2025 at 3:41 pm #213022
      Mark DawsonMark Dawson
      Participant

      <p>Thanks Marc for adding the corrected text. Not sure what has happened there as it looked fine when originally posted. I am not looking at changing the power inlet fuse as I seriously doubt it would have any influence on the sound as it isn’t in the audio path and my amp is completely silent with no music playing. I also got a chunky shielded power supply cable any heard no difference from the stock cable.</p>

    • April 20, 2025 at 11:05 am #213031
      WilfriedWilfried
      Participant

      <p>Ik maak geen reclame maar er is een Franse audiodealer (online webshop) die een stereoversie heeft gemaakt met duo power supply en 2 versterkermodules in 1 behuizing.</p><p>Verder heeft deze versie zowel XLR als RCA uitgangen en beschikt dit apparaat ook over een trigger in en trigger out voor eventueel aangekoppelde apparaten aan te schakelen.</p><p>De kast vind ik ook wat mooier en de terminals zijn heel goed.</p>

    • April 20, 2025 at 1:43 pm #213032
      MarcMarc
      Participant

      I think it’s the form’s text editor.
      In my system i almost always hear differences from power cables. I can also test against each other easily because I have mono blocks. I will just start with some cheap ceramic fuses of Ali. Aucharm.

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