Model	STD 44004	STD 6004	STD 1204	STD 15004	STD 18004

8Ω Stereo power	4 x 400W	4 x 600W	4 x 1200W	4 x 1500W	4 x 1800W
4Ω Stereo power	4 x 600W	4 x 900W	4 x 1800W	4 x 2250W	4 x 2700W
8Ω bridged Stereo power	1200W + 1200W	1800W + 1800W	3600W + 3600W	4500W + 4500W	5600W + 5600W
Channel	4
Output connectors	Speakon Connectors
Frequenty response	20Hz - 30kHz +- 0.5dB
Signal noise ration (dB)	110dB
THD + N (rated power, 40/kHz)%	< 0.1%
Input connectors	Combo XLR type, 3pin
Link connectors	XLR type, 3 pin male
Input impedance	（20Hz-20kHz, balanced)； 20k Ohm Balanced or 10k Ohm Unbalanced
Input gain	Rear panel: 0.775V/1.0V/1.4V
Fan	3 PCS temperature control cooling Fan
Protection	temperature , DC, sub/ultea-sonic, short Circuit, over load, IGM, output
Indicators (per channel)	Protect indicator, Signal indicator, Work indicator
Power requirement	220 - 240V ~ 50 - 60Hz
Airframe	483 x 439 x 88 mm
Transport dimensions	623 x 575 x 143 mm
Weight (net)	26 kg	29 kg	32 kg	34 kg	36 kg
Gross weight	28 kg	31 kg	34 kg	36 kg	38 kg