Ha!! Success.
Nice!
What SMPS or LPSU are you planning to use?
Any idea what would be a realistic power output into 8 Ohms with let's say 0.1% THD?
The board seems to be PBTL so power shouldn't be wanting.
Ha!! Success.
Hi Sanjeev,
here's the link : TPA3251D2 2CH Class D Audio Amplifier
now, what i can see on the pcb, it is written: IN A, B, C , D and there's also a jumper to select SE(Single ended) and DIFF(Differential) inputs. so, probably this kit is 4 channel amp in SE mode and 2 channel amp in DIFF mode,
It uses one chip in BTL mode to make a 2 channel amp, and there are op-amps(NJM4580, these are good) on the pcb as buffers for the TPA chips. One op-amp per channel. So, if you wish to use this kit in 2 channel Bridge tied load configuration, then you have to provide differential inputs. It needs an inverted signal to properly work in push-pull configuration.
I couldn't find any documentation for the kit, so my opinion is based on pics of the module.
Regards,
Aniket
yes right.The input impedance in this board will come from the i/I of the op-amp circuit.
How does one find out how much is that? And how do I find out the output impedance of the Boss DAC ? Without these two values,, a proper interface will not be possible.
Can a ferrite core transformer with a dual secondary and matching impedances serve this purpose?
If you want to go the purist way of using transformer as suggested in the same page, there's a firm in Mumbai that builds such RCA-XLR impedance matched transformers (but very costly).
How much cost are we talking about here? Any pointers towards the source will be helpful.
About Rs 3500 per piece so Rs 7000 for a pair. Promedia, Mumbai custom made as per our requirement of connector types.
I suggest check Jensen transformer catalogue/ brochure and get them made as per that specs.