Thanks for the kind words guys.
@Chermann yes that’s exactly the cases I used, I found the fit and finish really good, plus it came with lots of extra screws. They were pricey at £96 for the pair including shipping but after much searching it seemed like a reasonable price and I like the look of the rounded corners.
@Chermann yes that’s exactly the cases I used, I found the fit and finish really good, plus it came with lots of extra screws. They were pricey at £96 for the pair including shipping but after much searching it seemed like a reasonable price and I like the look of the rounded corners.
They look really good Daniboun. Do you have any images of the insides?
Im looking to add an illuminated power button, is your button 240v or are you using a relay with a trigger system?
Im looking to add an illuminated power button, is your button 240v or are you using a relay with a trigger system?
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Dani .Ok...😉 but...at alliexpress the delivery pe take time ... and the delivery costs may rise a lot... : eek:
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Congratulations on your build. It looks professional, my builds don’t look nearly as tidy. Where is the hum coming from? The amps or the DAC?
Just noticed you have power leads going to both power terminals on either side of the amp. I don’t think this is needed, there are two just so you can choose the best one for routing.
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Thanks Elli,
Currently the amps are jumpered for SE but I have an RCA to XLR coming from the DAC to the power amps. The XLR is jumpered at the XLR connector in the wire side housing, GND being tied to something else (I can’t remember off the top of my head what it’s tied too), it’s a cheap eBay job, I think the connectors were £4 or something and I was dubious of the design of them, however my knowledge is limited in this area. I suspect the hum is being introduced here at the XLR, the aim is to have a balanced DAC at some point and then to correctly ground the XLR’s based on Bruno Putzey’s “The “G” word” paper.
The DAC tested very well on Audio Science Review, so I doubt the DAC is to blame, I need to do some testing with other equipment I guess to rule out a defect.
Regarding the dual power feed to the amps I queried this myself but XRK explained its best practice to have both rails feed so I followed this advice. Granted if not needed and considering the proximity to the amp input wire it would be good to remove it if possible.
Have you had any hun issues with your amps? Do you 3e Audio modules in your builds?
Currently the amps are jumpered for SE but I have an RCA to XLR coming from the DAC to the power amps. The XLR is jumpered at the XLR connector in the wire side housing, GND being tied to something else (I can’t remember off the top of my head what it’s tied too), it’s a cheap eBay job, I think the connectors were £4 or something and I was dubious of the design of them, however my knowledge is limited in this area. I suspect the hum is being introduced here at the XLR, the aim is to have a balanced DAC at some point and then to correctly ground the XLR’s based on Bruno Putzey’s “The “G” word” paper.
The DAC tested very well on Audio Science Review, so I doubt the DAC is to blame, I need to do some testing with other equipment I guess to rule out a defect.
Regarding the dual power feed to the amps I queried this myself but XRK explained its best practice to have both rails feed so I followed this advice. Granted if not needed and considering the proximity to the amp input wire it would be good to remove it if possible.
Have you had any hun issues with your amps? Do you 3e Audio modules in your builds?
It seems pin 1 & 3 are tied together, so I’m not sure if this is the issue..
Attachments
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Thanks
230V Led power ON / OFF (12V led) for silver
230V No led for black, + independent 220V black led.
Thanks for the clarification, I’ll remove the jumper between pins 1 & 3 and see if that decreases the hum.
I have not had any hums from my 3eAUDIO builds SE or balanced. I did not ground my balanced signals to the case either, I don’t think it is needed and can induce ground loops. The only grounds/earths are to the case and psu.
New take on a DIY class-D amplifier. This is the prototype, just finished...
The amplifier is based on a 5th order modulator for optimum performance.
Features:
The board includes a full protection circuit:
Next updates version will also include protection against output MOSFET failure.
The amplifier is based on a 5th order modulator for optimum performance.
Features:
- 400 watt @ 4 ohm
- Peak current limited to 30A
- Distortion levels of below 0,0005% at 1dB below rated power.
- Output noise level 33uV
- Output impedance approx 50uΩ
- Fully differential input
- Gain 30dB
- Input impedance 10kΩ
- IRF DirectFET output devices
- Onboard gatedrive regulator
- PSU requirements: +/- 60VDC (35-65VDC) and +/- 12VDC. All rails are monitored.
- Board size 50mmx80mm (thats smaller than your credit card)
The board includes a full protection circuit:
- +/- 60VDC to low (<35VDC)
- +/- 60VDC to hig (>70VDC) bus pumping
- +/- 12VDC to low (<10VDC)
- Short circuit (Current limited to 30A)
- Large HF signals at output
- Overtemperature (60 degress celcius) - Not likely to happen 🙂
Next updates version will also include protection against output MOSFET failure.
An externally hosted image should be here but it was not working when we last tested it.
