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! 🙂
Best Answer
The TA2021 in the Topping amp is already BTL when driving loudspeakers.
So you best bet for using it in mono is just driving both inputs in parallel and connecting two loudspeakers. If you've only got one 8 ohm loudspeaker you can only get 14W from the TA2021
Two 4 ohm loudspeakers would be best.
Now about that mono interconnection:
If you connect the loudspeaker between the left+ and the right- output you'll get the sound in mono (an even mix of left and right inputs)
with that 8 ohm speaker you'll get up-to 14W