TPA3116 / RuneAudio Project

[Bjarne]

Hi
What about this one?
http://www.yuan-jing.com/tpa3116-class- ... rd-50w-50w

Regards Bjarne

[Downunder55]

[Downunder55]

Although for those who don't want to tinker and a get a simple single sourced solution (integrated DAC & AMP) I think these guy's could be worth watching .....

http://iqaudio.com/

http://www.hifiberry.com/

[Bjarne]

Hi

About the Audiobah board. Does it need a preamp or can I just put in my Attenuator between the amp and dac?

/Bjarne

[Hove]

Sorry about the late arrival to this thread and the simple question, but how did you drill out a 16mm hole through the 8mm aluminium front face for the switch?

Do you have a milling machine, or is there a drill bit that can be used with caution?

In a similar vein, how would you drill the front face to volume knob diameter at the front, but volume control shaft at the rear?

The case from my last project 15 years ago only had a 3mm thick rack-style case, so the switch hole was easy and the second wasn't possible due to the thin case meaning the volume knob couldn't be sunk into the case.

Thanks

[skrodahl]

First reply @Bjarne:
No, the TPA3116 does not need a preamp. It sounds really nice by itself with a pot as a volume control. A preamp will take it to another level though.

@Hove:
I used a . When I reached the desired hole size, I turned the panel around and drilled the same diameter from the other side.

Off-topic warning: I ordered a number of professionally made PCBs of the Audiokarma CNC MM Phono Preamp from a PCB manufacturer:

IMG_20141021_235214.jpg (137.4 KiB) Viewed 8115 times

IMG_20141021_235138.jpg (135.45 KiB) Viewed 8115 times

Apart from the variable input, it also has variable gain according to .

They turned out really nice, it was a considerable improvement from the home-etched boards.

[Downunder55]

[matt]

My "red" TPA3116 turned up today,I'm still waiting for a couple of other things before I can get into my projects properly.
Anyway, I quickly hooked up some speaker teminals and my pi and grabbed a 19v laptop power supply I have lying around.Unfortunately the plug was too big for the recepticle on the board so I ended up using a 12v 1.5a supply.
Wow! I wasn't expecting much for $15,with only 12v and 8ohm speakers (admittedly with 98db sensitivity) but it certainly pumps out the volume.
I have only had a fairly quick listen and play around with it and my first impression is that it seems a little harsh on the highs particularly at increased volumes.
My speakers (Klipsh rf35) are naturally quite bright also, so they may not be a good match.
Is a beefier power supply likely to alter the sound at all , perhaps its straining a bit at high volume with only 12v?
I'll see what other power supplies I can dig up to try, I'm not gonna give up on it yet.
Happy to hear others thoughts or suggestions.

[skrodahl]

[matt]