Professional Power Amplifier LA series this series are selling very well in Europe market .They are very stable , reliable.It is suitable to install intheater, restaurant,meeting hall, club, disco, live show and so on. Characteristic of LA series (1) Toshiba transistor (2) soft start. (3) DC protect. (4) Overheat protect when the temperature of amplifier over 95 (5)Overload protect. (6) Short circuit protect. (7) Limiter function. (8) Crossover inside to cut off the low frenquency to protect your speaker. (9) Bridge and parallel mode for choosing. (10) Sensitivity input selection. (11) Output impedance selection (4 ohm & 8 ohm) (12) Ground selection. (13) Very effective cooling system. The speed of the fan is adjustable according to the temperature. SPECIFICATIONSModelLA300LA400LA600LA800Output 8Ohms 1KHz0.1% THD stereo Mode:2 x 300W2 x 400W2 x 600W2 x 800WOutput 4Ohms 1KHz0.1% THD stereo Mode:2 x 450W2 x 600W2 x 900W2 x 1200WOutput 2Ohms 1KHz0.1% THD stereo Mode:unavailable2 x 800W2 x 1100W2 x 1400WOutput 8Ohms 1KHz0.1% THD bridge Mode:700W1000W1800W2000WOutput 4Ohms 1KHz0.1% THD bridge Mode:unavailable1200W2000W2400WSignal / noise:103dB105dB105dB106dBSlew Rate:60v/μs60v/μs80v/μs80v/μsDamping factor:400:1450:1500:1550:1Fuse:T8AT10AT12AT15APower Supply:220V 50/60HzInput Sensitivity:0.775V,1.0V,1.55VFrequency Response @1 Watt into 8 Ohm:±0.1dB, 20Hz -20kHzTHD+N:≤0.01% @ 8Ω1kHzIMD:≤0.01% @ 8Ω at rate outputInput Impedance:20k Ohm Balanced or10k Ohm UnbalancedCrosstalk at Rated Output 8 Ohms 1kHz:≤-70dBImput CMRR:≤-75dBIndicators:Signal, Protect, Clip, LimitedNet Weight:16kgs17kgs28kgs30kgsDimensions:(mm)483W x 420D x 88H483W x 490D x 88H