I made my tsa1400 work hard, straight from the delivery box. Im Well pleased too .
my sound system is mostly 4 ohm speakers, 2 - 4ohm bass & 2 - 4 ohm mid/high. I previously needed 2 amplifiers to run my setup, but this beauty powers the whole show now, running 2 ohms per channel. Channel "A" runs the mid/high's @ 2 ohms & channel "B" runs the bass's @ 2 ohms and what a sound, mid/highs are Christal clean & very powerful, basses are like a full body punch if near enough to them. My speakers are big old things, but this amp makes them sing so well. I always run "mono" sound with an active line level crossover.
The tsa 1400 is a fantastic piece of powerful kit @ a "real nice price". I like to share my mp3 music with my neighbours with the ocaisonal outside rave/disco.
Thanks again to thomann for the rapid delivery.
Update" after 5 weeks weekend use @ 2 ohms per channel, I run the bass @ almost full volume (channel B), and mid/high at 3/4 volume (channel A). This beast delivers the goods.
2/12/22. Still using this amp very hard, but only 1 night a week now. No problems yet, love it.