comments:
I am a huge fan of the amps made with Texas Instruments TPA3xxx Class D amp chips. Their resolution and detail is incredible. Since they are class D they are also incredibly efficient so I get excellent battery life with them. I also use power tool batteries for my portable amps. I really appreciate the wide voltage range of the TPA amps. With the TPA3255 amps I can use a 20v Milwaukee or Dewalt battery or a Kobalt 40v battery. This is one of my favorite amps: https://www.amazon.com/dp/B0CHF6MML7?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_15 It uses the TI TPA3251 chip that is a little less power than the TPA3255 chip but WAY more power than I will ever need.It supports Bluetooth 5.1 and the advanced CODEC's with much higher resolution streaming. One quirk of the TPA3xxx Class D chips is that they are so high resolution and detailed that I can easily hear the difference between Bluetooth 5.0 and Bluetooth 5.1 when I use good speakers.This board has a built in sub channel which eliminates the need for speaker level to line level attenuator (I agree, I prefer NOT having to use one of these). I have built a few of my own speakers using the available speaker design software and they never turn out sounding as good as good high end speakers. So I use high end book shelf speakers that I buy from garage sales and such. They sound much better than anything I can design and build myself. This is my current build. It will use the Tangband 5.25" sub and 6" passive radiators on the back with more cabinet volume for deeper lows. I plan on integrating the sub, battery, amp, and an AC power supply into this cabinet then hang some quality bookshelf speakers off the sides. I prefer detachable speakers for better stereo imaging.