Problem minidsp/sure + powersoft digimod

Hi everyone, I have a mini dsp that I want to use to bi-amp some speakers. I have some powersoft digimod 1000 and 500 that can be used both unbalanced and balanced, but the output level of the Mini dsp with an RCA connector is too low in terms of volume to be able to drive the amplifier. I tried some adau modules from sure and the result is the same. Where can I buy a PCB that acts as a preamplifier between the DSP and the amplifier? AliExpress? How should I search? Do you have any links? Thanks

VECTORDJ wrote: Buy a Real Crossover/DSP.....DBX Driverack is very Good for the Money.

 

hi, i need it for an active speaker box

So, you rather not feed the MiniDSP into a Distribution Amplifier to a powered box? Your limiting factor is MiniDSP as it is a Home Audio grade Crossover Network. You are basically going from one extreme to another.

 

From the first post, it would appear that the miniDSP is being used as a crossover. A separate amplifier for each output is thus required. The distribution amplifier you mentioned is a 1 in 4 out. He would need 2 of them per cabinet. RDL do a number of more suitable unbalanced to balanced converters, but they are pricey.

There was no mention of where the completed system is to be used, so if it is to be used at home I guess home audio grade is fine. The only problem, irrespective of use, is the limited output level of the dsp, or looking at it the other way, the lack of gain in the digimod.

 

If Angelow can use a soldering iron, making a custom preamplifier board, with a few op-amps, resistors and capacitors, would not be too difficult. Do a web search for balanced line out circuits. Most audio equipment uses variations on the same circuit. It might also be worth checking to see if the gain of the analogue output stage of the dsp can be modified to give more output.

 

A search on AliExpress for “preamplifier boards” brings up plenty of results. Whether any are suitable I can’t say.

Distribution Amplifiers are offered in many configurations. The one I mentioned (own) is an example what you can expect in terms of output voltage. Angelow will need to research the right Distribution Amplifier for his requirements.

 

Thanks for clarifying that you agree the device you suggested is unsuitable for the OP.

I know that this may sound a bit obvious but have you tried making up a single co-ax lead from the unbalanced RCA connector to a male XLR and wiring the XLR pins as pin 2 live and pin 1 linked together to pin3 thus unbalancing the XLR end of the lead.