Model |
US-1200 |
US-1800 |
US-3000 |
US-4000 |
|
<< Stereo Both Channel Driven @ 1kHz, 1%THD >> |
|
8 Ohms |
210 watts |
300 watts |
500 watts |
700 watts |
|
4 Ohms |
330 watts |
475 watts |
800 watts |
1100 watts |
|
2 Ohms |
430 watts |
700 watts |
1200 watts |
1600 watts |
|
<< Bridged Mono @ 1kHz, 1%THD >> |
|
8 Ohms |
650 watts |
950 watts |
1600 watts |
2200 watts |
|
4 Ohms |
850 watts |
1400 watts |
2400 watts |
3200 watts |
|
Input Sensitivity |
1.23 Vrms (+4 dBu) for full power @ 4 Ohms |
|
Input Impedance |
30K ohms Balanced/15K ohms Unbalanced |
|
Frequency Response |
0/-0.5dB: 20Hz - 20kHz; 0/-3dB: 5Hz - 60kHz |
|
Signal to Noise Ratio |
Better than 100dB (20Hz - 20kHz) |
|
Distortion (SMPTE-IM) |
Less than 0.03% |
|
Output Circuitry |
AB |
AB |
H |
H |
|
Cooling |
Continuously variable speed fan, front to rear |
|
Protection |
Short circuit, thermal, current limit, dc offset, AC current inrush, |
|
|
RF protection, subsonic, turn on/off muting |
|
Connectors |
Input: Combo female XLR & 1/4” TRS jack. Link: Male XLR |
|
|
Output: Both 5-way biding post and Speakon™ |
|
Controls |
Front: Power on/off switch, volume controls for each channel |
|
|
Rear: Mode switch (stereo / parallel / bridge), HPF on/off, |
|
|
Limiter on/off (US3000/4000) |
|
Indicator |
Power, parallel, bridge. Each channel: Signal, -20dB, -10dB, clip, protect |
|
Power Requirements |
115/230V 60/50Hz factory configured |
|
AC consumption |
Both channels driven at 4 Ohm load, at 115Vac (for 230V divide by 2) |
|
Controls |
Front: Power on/off switch, volume controls for each channel |
|
Typical level, 1/8 |
4.5A |
6.3A |
7A |
9.6A |
|
|
Severe level, 1/3 |
7A |
9.6A |
14.8A |
19.8A |
|
|
Dimensions |
19” (482mm) x 3.5” (88mm) x 17.2” (438mm) |
|
Net weight |
28lb (13kg) |
35lb (16kg) |
43lb (19kg) |
49lb (22.3kg) |
|