ROLLS RA163 8 CHANNEL XLR DISTRIBUTION AMP

Rolls RA163 8-Channel Distribution Amplifier

On-Stage HA4000 4-Channel Pro Headphone Amplifier

Behringer HA4700 4-Channel Rack Mountable Headphones Amplifier XLR/TRS

Rolls RA62 6‑Channel Headphone Amplifier Rack Unit Serial Number: 62-962820

Vintage ROLLS HA204 2x4 4-Channel Battery Stereo Headphone/Earphone Amplifier

Rolls HA204 2x4 4-Channel Battery Stereo Headphone Amplifier with HTF AC Adapter

Samson Servo 120 1U 19" 120W 2-Channel Stereo Power Amplifier Amp