Hello everyone, amateurs and pros sound, first of all, just a little remark sympatoche, over this range of amps, I always hear about the QSC RMX, CREST CPX, YAMAHA P SERIES, HPA, CROWN, etc.. .. But DYNACORD SL and its twin ELECTRO VOICE Q, very little is heard and pout top gamme.Le DYNACORD SL900, I used the last six months with a pair of Wharfedale TWIN 12X and a box MACKIE SRM 1801 and Mixer ECLER SAM 512 , used it one day before SYNQ DIGIT 1KO, good amp but nothing to do with DYNACORD, what I like with this brand c, is low depth, especially with WHARFEDALE TWIN 12X, with a coaxial hp very acute, otherwise nothing more to say, so excellent in all areas and I will remain loyal to this brand long time as well as ELECTRO VOICE ...