The little BT20A had no trouble powering my NHT C3 speakers and had heaps of power to spare. As a result, the bass was full-bodied and tight (even with the tone set to neutral), the midrange was clear and the treble lively and detailed. The idea of a low cost, high quality two channel amp which is small enough to be easily portable may seem odd but it does make a lot of sense, especially for homes that don’t have the space for a large amp. The inclusion of Bluetooth 5.0 makes it even more useful as you can avoid a lot of extra wiring, or hook it up outside to enjoy music with your barbeque. Set up and tear down is a laugh, and won’t take you any time at all. Seeing how you have tone controls anyway, you could tailor any peaking with adjustment of the treble control. Won't be exact but should be good enough.

A more sophisticated amplifier with added features and better Bluetooth connectivity with a range of 50 ft. It has a built-in speaker protection circuit, the TPA3116D2 Chip for hi-fi sound, as well as bass and treble control. Notice the great channel match in addition to very good SINAD which represents noise and distortion. Same is true with 32 volt supply:

Stereo Amplifiers: Budget Under £100 vs. Expensive Under £200

The BT20A Pro includes treble and bass controlswith a central detent so they can easily be reset to the neutral position. There is also a line-level output linked to the volume control so you can easily add a subwoofer. As an aside, the company has been a joy to work with. They were exceptionally polite, cordial and patient as I went through my testing and evaluation. They tell me they have internal R&D team and it shows.

This amp was much cleaner over bluetooth than the A07 Pro (or other similar bluetooth implementations I have tried in the past) - my not very scientific approach is to play something totally quiet and listen in the near field to any noise coming out speakers - this amp was the same over bluetooth and RCA as far as that subjective test was concerned. The A07 Pro was not. Hopefully there will be more definitive measurements release here soon. Ensure that the positive and negative poles of the speaker output do not touch together. Some relatively large banana plugs are easy to touch together and cause a short circuit. Although to be fair, I put the cursor at an earlier point than for 48 volt supply (not enough measurement points there).

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Really, the only occasion we would suggest buying this amp is if it was on sale and better options were sold out. Bluetooth while it sounds clean (little or no noise compared to the A07 Pro) it just supports the SBC codec (so no AAC or LDAC) Onkyo M-5010 is a simple, reliable and minimalistic solution for your sound system – stern and affordable. What is the best budget stereo amplifier? A good amplifier will make your speaker sound louder and better, but keep in mind that it will not make a bad speaker work like a good one. The first thing to consider is power output. We advise you to choose a model that delivers power equal to twice the speaker's power rating.