- Thread Starter
- #21
Yes, there is a copper pad on the bottom of the PCB.
Using the PCB as a heat sink from the looks of it.
Most of the tests are at 1 kHz. Performance varies at other frequencies and that is the measurement that shows it.The 15kHz distortion is around -55dB, but on power versus distortion @4ohm graph the THD+N is always less than -70dB, can someone kindly tell me why that is?
I also remember crosstalk is something that these amplifiers always fall flat on.
Dont understand what they do at the power input. Isnt 31V not to much for a tpa3116? Remember something about max. 26V? But nice that if implemented right this chips can work well. The problem is looks like they often get not implemented right.
Yep, 31V is way too high for this amp based on the info on its website...Dont understand what they do at the power input. Isnt 31V not to much for a tpa3116? Remember something about max. 26V? But nice that if implemented right this chips can work well. The problem is looks like they often get not implemented right.
There is no documentation on this on Allo other than saying to get 60 watts, you needed nearly 29 volts. So that is already above the spec for the chip. It clearly was happy at 31 volts and the capacitors are rated at whopping 80 volts!Dont understand what they do at the power input. Isnt 31V not to much for a tpa3116? Remember something about max. 26V? But nice that if implemented right this chips can work well. The problem is looks like they often get not implemented right.
Sorry, should have been more clear. I did run the dashboard at 13.5 volts since that was at 5 watts. For later tests I upped the voltage to 31.I am confused by the voltage you are supplying to this amplifier @amirm "I used my lab power supply at its max setting of 31 volts and 3 amps." The dashboard says "13.5V Lab Supply", then we are back to 31V on the power v distortion graphs ?
Dont understand what they do at the power input. Isnt 31V not to much for a tpa3116? Remember something about max. 26V? But nice that if implemented right this chips can work well. The problem is looks like they often get not implemented right.
That's possible. I had a hard time reading the last digit and was too lazy to get my magnifier.Looking at the website, it seems the Volt + uses the TPA3118D2 -- not the TPA3116.
Sorry, should have been more clear. I did run the dashboard at 13.5 volts since that was at 5 watts. For later tests I upped the voltage to 31.
I see. Not sure I agree with the inconsistency between the different measurements then, not to mention neither 13.5V nor 31V are very 'real world' when it comes to the manufacturer-recommended laptop power supplies.