Specifications
The following applies to units in Stereo mode with 8-ohm loads and rated input sensitivity unless otherwise specified.
Performance:
Sensitivity (volts RMS) for full rated power at 4 ohms,
XLS202: 0.725;
XLS402: 1.025;
XLS602: 1.26.
Frequency Response (at 1 watt) 20 Hz to 20 kHz: ±0.75 dB. Phase Response (degrees at 1 watt)
at 10 Hz: –10.
at 20 kHz: +19.
Signal-to-Noise Ratio (20 Hz to 20 kHz)
A-weighted, below rated power: > 100 dB.
No weighting, below rated power: > 95 dB.
Total Harmonic Distortion (THD) at full bandwidth power, from 20 Hz to 1 kHz: < 0.5%.
Intermodulation Distortion (IMD) (60 Hz and 7 kHz at 4:1) from full rated output to –40 dB:
< 0.3%. Damping Factor (8 ohm) 10 Hz to 400 Hz: >200. Crosstalk (below rated power) at 1 kHz: –82 dB.
at 20 kHz: –58 dB.
Voltage Gain (at maximum output): 31 dB.


Power
Load Impedance: Safe with all types of loads. Rated for 2 to 8 ohms in Stereo, 8 ohms in Bridge-Mono. AC Line Voltages Available (±10%): 120VAC, 60 Hz and 230VAC, 50 Hz.
Controls
Level: Two front-panel, black rotary level controls, one for each channel.
Power: Front-panel switch; on when in the UP position.
Circuit Breaker: Provides overload protection.


Indicators
Clip: Two front-panel red LEDs, one for each channel, illuminate when the channel’s output signal is being overdriven.
Power: Green front-panel LED indicates amplifier has been turned on and AC power is available.
Fault: Yellow front-panel LED illuminates when amplifier is in protect mode. Also illuminates briefly during normal power-up when amplifier is first switched on.
Input/Output
Input Connectors: One per channel; back-panel three-pin female XLR input connectors are provided. Input Impedance: (nominally balanced, nominally unbalanced): 20 k ohms, 10 k ohms.
Output Connectors: One 4-pole Speakon® connecotr and one pair of back-panel, 5-way binding posts per channel; accepts banana plugs, spade lugs or bare wire. (European models do not accept banana plugs.)
DC Output Offset (shorted input): ±10 millivolts. Output Signal: Stereo, unbalanced, two-channel.

Protection
XLS Series amplifiers provide extensive protection and diagnostic capabilities, including output current limiting, DC protection, circuit breaker, and special thermal protection for the unit’s transformers.


Construction
Ventilation: Flow-through ventilation from front to back. Cooling: Internal heat sinks with forced-air cooling for rapid, uniform heat dissipation. Air Volume Requirements (per minute per unit): 80.15 ft³ (2.27 m³).
Dimensions: EIA Standard 19-inch (48.3-cm) rack mount width (EIA RS-310-B), 3.5-inch (8.9-cm) height and 14-inch (35.6-cm) depth behind the mounting surface.


Weight
Net Weight, XLS202: 21.0 lbs. (9.5 kg); XLS402: 25.3 lbs. (11.5 kg); XLS602: 27.2 lbs. (12.3 kg). Shipping Weight,
XLS202: 26.0 lbs. (11.8 kg); XLS402: 30.3 lbs. (13.8 kg); XLS602: 32.2 lbs. (14.6 kg).