Used to power my Axe FX II. It's super beef.
Moderate rack rash, as is to be expected, but in top nick otherwise.

Here are the deets from ART:

2-Channel 200 W Power AmplifierFind A Dealer

The SLA2 is the most powerful amplifier from ART: a two-channel linear power amp designed for passive studio monitors, with the versatility and volume for live and commercial applications.

It delivers 200 watts per channel at 8 ohms and 280 watts per channel at 4 ohms. It can also be bridged for up to 560 watts into a single 8 ohm load. The SLA2 offers a wide frequency response of 10 Hz - 40 kHz (+/- 0.5 dB) with ultra-low noise and distortion to deliver the full fidelity of your source material.

Each channel has an independent volume control and status LEDs to indicate signal activity, clipping, and thermal protection. The rear panel has balanced XLR and 1/4 TRS inputs, Euroblock inputs, and binding post outputs for bare wire, banana plug, or spade connectors.

The SLA2 also incorporates our SmartFan system that adjusts the fan speed based on the internal ambient temperature for advanced cooling and quiet operation.

Need more channels? Check out the SLA4.

Features

• 2-Channel Linear Power Amplifier
• 200 W per Channel, 560 W Bridged (8Ω)
• XLR, 1/4" TRS, and Euroblock Inputs
• Binding Post Outputs
• 10 Hz - 40 kHz Frequency Response (+/- 0.5 dB)
• SmartFan Adaptive Cooling System
• 1U Rackmount

SpecificationsStereo Output PowerStereo Output Power, 4 Ω: 280 W RMS per channel
Stereo Output Power, 8 Ω: 200 W RMS per channelInput/Output ConnectionsXLR, Euroblock (bal), 1/4″ TRS (bal/unbal)Frequency Response (Hz CM +/- 1dB)10 Hz to 40 kHz, +/- .5dBHum and Noise (un / Aweighted -dB)> 100 dB below clippingTHD -1kHz- 4 OHMS> 0.05% (typical)Input Impedance - Bal/Unbal (Ohms)44k Ω (bal), 22k Ω (unbal)Input Sensitivity (Vrms) For Full Power Out1 V for full power outputCMRR AT 60Hz (min/typ)> 60 dB (typical @ 1 kHz)Stereo / Mono / Bridge )S/M/B)Bridged Output Power, 8 Ω: 560 W MONOTransformer TypeToroidalDimensions1.75″ x 19″ x 13.5″ (4.45 cm x 48.26 cm x 34.29 cm)Weight (lbs / kg)19.8 lbs / 9 kg