The following applies to units in Stereo mode with 8-ohm loads unless otherwise specified.

Performance

Sensitivity (volts RMS) for full rated power at 4 ohms: 1.25 V.

Frequency Response (at 1 watt) 22 Hz to 20 kHz: +0 dB, –0.8 dB.

Signal-to-Noise Ratio (20 Hz to 20 kHz)
A-weighted, below rated power:
>98 dB.
No weighting, below rated power:
>93 dB.

Total Harmonic Distortion (THD): <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: –76 dB. at 20 kHz: –58 dB.

Input Impedance (nominal): 20 kilohms balanced, 10 kilohms unbalanced.

Load Impedance: Rated for 2 to 8 ohms per channel in Stereo, 4 to 8 ohms in Bridge Mono.

AC Line Voltage and Frequency Configurations Available (±10%): 120 VAC 60 Hz

Controls

Level: Two front-panel rotary level controls, one for each channel.

Power: Front-panel switch; on when in the IN position.

Circuit Breaker: Back-panel breaker provides overload protection.

Mode Switch: Back-panel switch selects Dual or Bridge-Mono mode.

Indicators

Signal Presence Indicators: Two green LEDs, one for each channel, illuminate when the channel’s input signal exceeds –40 dBu.

Clip Indicators: Two red LEDs, one for each channel, illuminate when the channel’s output is being overdriven.

Power Indicator: Blue LED indicates amplifier has been turned on and AC power is available.

Fault Indicator: Two red LEDs illuminate 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.

Output Connectors: Two 4-Pole Speakon® Output Connectors accept 2-pole or 4-pole Speakon connectors. The top Speakon connector is wired for both channels so it can be used for bridge-mono wiring or for stereo wiring of two speakers to a single Speakon connector.
One pair of back-panel binding posts per channel; accepts banana plugs or bare wire. (European models do not accept banana plugs.)

Protection

XLS Series amplifiers provide extensive protection and diagnostic capabilities, including output current limiting, DC protection, circuit breaker, and thermal protection.

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 15.2-inch (38.6-cm) depth.

Weight
Net Weight:
XLS-202: 23.0 lb (10.4 kg)
XLS-402: 25.7 lb (11.7 kg)
XLS-602: 29.0 lb (13.2 kg)
XLS-802: 35.5 lb (16.1 kg)

Shipping Weight:
XLS-202: 28.0 lb (12.7 kg)
XLS-402: 30.7 lb (13.9 kg)
XLS-602: 34.0 lb (15.4 kg)
XLS-802: 40.5 lb (18.4 kg)