Self Medicating > General DIY
Pizza Box v2.0 Class D amp project
GDHAL:
--- Quote from: HAL on May 24, 2023, 03:29:15 AM ---
--- Quote from: Nick B on May 24, 2023, 12:24:50 AM ---
--- Quote from: HAL on May 23, 2023, 12:44:22 PM ---Nick,
Not sure but the SMPS are already shielded, so might be simple with moving the amp modules away. I really like the original Starkrimson monoblocks with the external SMPS over putting the supply in the chassis.
--- End quote ---
Rich,
I like the idea of separating/isolating the power supplies. Have you ever used vibration control devices to see if you squeeze max performance out of a device? Years ago, Steve McCormack told me he was using small still points within the chassis and it improved the sound. I didn’t ask what the exact implementation was.
Nick
--- End quote ---
Nick,
I have used feet made with Navcom and Sorbothane on electronics for vibration damping. This helps isolate any mechanical noise going either way. I use hard points to couple speakers to the floor for stability and not moving, so the opposite of damping. If the speaker cabinet moves with vibration not a good thing.
Just my way of thinking.
--- End quote ---
I reckon different circumstances require different solutions, but to my way of thinking - and experience - coupling speakers to the floor is no good as it invites unwanted resonances, regardless of the type of flooring. There are plenty of excellent decoupling methods that also prevent movement of the speaker cabinet.
HAL:
After owning Von Schweikert Research VR-8 speakers for a long time, at 500lbs each, they sat on gliders on the carpet. No movement problems as the carpet and jute pad compressed sitting on concrete. That worked well and no spikes needed.
Nick B:
--- Quote from: HAL on May 24, 2023, 03:29:15 AM ---
--- Quote from: Nick B on May 24, 2023, 12:24:50 AM ---
--- Quote from: HAL on May 23, 2023, 12:44:22 PM ---Nick,
Not sure but the SMPS are already shielded, so might be simple with moving the amp modules away. I really like the original Starkrimson monoblocks with the external SMPS over putting the supply in the chassis.
--- End quote ---
Rich,
I like the idea of separating/isolating the power supplies. Have you ever used vibration control devices to see if you squeeze max performance out of a device? Years ago, Steve McCormack told me he was using small still points within the chassis and it improved the sound. I didn’t ask what the exact implementation was.
Nick
--- End quote ---
Nick,
I have used feet made with Navcom and Sorbothane on electronics for vibration damping. This helps isolate any mechanical noise going either way. I use hard points to couple speakers to the floor for stability and not moving, so the opposite of damping. If the speaker cabinet moves with vibration not a good thing.
Just my way of thinking.
--- End quote ---
Thanks, Rich. Keep us posted with your progress. I just picked up a Holo Red streamer. A very good streamer and better than my iFi Zen. The Ultra is doing an excellent job showing the differences. Leo did a really nice job.
Nick B:
--- Quote from: GDHAL on May 24, 2023, 06:22:16 AM ---
--- Quote from: HAL on May 24, 2023, 03:29:15 AM ---
--- Quote from: Nick B on May 24, 2023, 12:24:50 AM ---
--- Quote from: HAL on May 23, 2023, 12:44:22 PM ---Nick,
Not sure but the SMPS are already shielded, so might be simple with moving the amp modules away. I really like the original Starkrimson monoblocks with the external SMPS over putting the supply in the chassis.
--- End quote ---
Rich,
I like the idea of separating/isolating the power supplies. Have you ever used vibration control devices to see if you squeeze max performance out of a device? Years ago, Steve McCormack told me he was using small still points within the chassis and it improved the sound. I didn’t ask what the exact implementation was.
Nick
--- End quote ---
Nick,
I have used feet made with Navcom and Sorbothane on electronics for vibration damping. This helps isolate any mechanical noise going either way. I use hard points to couple speakers to the floor for stability and not moving, so the opposite of damping. If the speaker cabinet moves with vibration not a good thing.
Just my way of thinking.
--- End quote ---
I reckon different circumstances require different solutions, but to my way of thinking - and experience - coupling speakers to the floor is no good as it invites unwanted resonances, regardless of the type of flooring. There are plenty of excellent decoupling methods that also prevent movement of the speaker cabinet.
--- End quote ---
My Reynaud speakers come with sliders…had no choice and they sound great. 85-90 lbs, but no problem moving on the laminate floor.
HAL:
The prototype using two 36VDC, 600W SMPS for power.
Wired them up and started testing them today. They do have fans, so that will be just for prototyping. The fanless versions are 3x the price, so want to make sure they work as I would like.
Trying larger loads tomorrow morning it that is stable, then time to try the amp modules. Leo has already given a tip to rewire the XLR's with balanced, shielded cable for minimizing noise pickup from the SMPS. Will shield the existing wires, as I have braid big enough to cover the wiring.
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