I have ONE Boston Acoustics Micro90X Speaker (for 15-125 watt amps), and a Topping VX1 2x25W Class T Amplifier (notionally 2 x 25 watts) that I don't currently use.
I thought both of these gave terrific performance for the price when I had two of the speakers (plus a decent subwoofer) in my hifi STEREO system. The amp was actually a little underpowered, but sound quality at non-ear-splitting volumes was way better than I'd have expected.
What I'd really like to do now is drive that speaker as a MONO system. I don't know much about electronics, but I found this in an article titled The Mighty T-Amp: You’ll Be Blown Away...
Being BTL [bridge-tied load], these amps have some other interesting characteristics, including the ability to output a mono audio output from a stereo input by simply connecting the load from the + terminal of one channel and the – terminal of the other.
Can it really be that easy? I guess all I'm really asking for here is someone who sounds like they know what they're talking about to say Yes!, and give me the confidence to give it a go. Also to reassure me there's no significant fire risk (I'd shed a tear if my Brave Little Amplifier simply died, but I wouldn't want to go down with it! :)