Had read and heard good words about the TS one series...so bought an alto TS-212 for the first time to try (had plans to buy 2 TS215s and 2 TS212s..thank God I didn't)...twice the teeter horn blew up...once on 3rd time use and again on 2nd time use thereafter. Have had dB and Behringer active speakers with no problems....but the TS212 is either a bad product or bad piece. Instead have bought a dB cromo15+ now...seems pretty good. Shall never buy Alto again. My TS 212 is gone back to workshop....don't know what to do with this piece of sh*t!