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  • Active or passive crossover

    Posted by mattreeves on September 6, 2020 at 4:21 am


    I have started an MTM build which may be changed into a small 3 way tower in the future. To avoid designing 2 different crossovers, I started thinking about an active crossover instead of passive. I thought this could be a good development tool that is more easily adjusted than a passive crossover. I have a few amps so cost will not be an issue for the power part of the active route. Are there any reasons not to try the active path and do you have any active crossover suggestions? MiniDSP was my thought but it sounds like they may have a noise issue. Any thoughts would be appreciated. Matt.

    mattreeves replied 1 year, 10 months ago 3 Members · 4 Replies
  • 4 Replies
  • 123toid

    September 11, 2020 at 7:03 am

    @mattreeves mini dsp will probably be your best bet if you think you are going to go three way.  

  • mattreeves

    September 13, 2020 at 10:14 am

    Thanks. I went for Dayton DSP chip with 2 inputs 3 outputs. I will use 1 per speaker as the crossover. I tried it out driving 3 different drivers and and it’s works really well for this purpose. I also tried out the dsp function with sigma studio and that was very powerful. My plan is to use CSS audio or SB acoustics drivers so hopefully DSP will not be required. I have attached a picture of one of the cabinets. I will finish these off before I buy the drivers.


  • beatmaniaboy

    October 16, 2020 at 7:01 pm

    I just bought that as well, actually the 2 boards together is basically just a minidsp HD

    the minidsp is based on the adau1701 and so is the dayton DSPB, the minihd has 2.1V just like the rca out on the dayton board, should be very similar

    i was actually looking at doing the same thing with a sure amplifier!

  • mattreeves

    October 16, 2020 at 11:19 pm

    Hi, I actually used the TI 2×50 amp from parts express. It was USD$7. It worked very well with the dsp combo. I settled for Dayton Rs180 reference drivers and sb acoustics tweeters. Strangely I have had better luck with this than my Cambridge Audio 200w amp and matching dac removed link I seem to have the noise issues that lots of forums mention but with the simple TI amp I have no signal noise problems. Attached is the speaker graph with green line showing the port tuning frequency. I still need to resolve the power amp issue.

     Matt- Australia