Used Acme Low B Series II 210
Acme is known for a very linear response and good power handling in a small cabinet. This one is clean with a little bit of carpet shred from being occasionally moved, but it's structurally sound and is a great box.
Frequency response: +/-3 dB 41Hz to 22 kHz -6 dB at 31 Hz
Power Handling: 350 Watts RMS continuous
Recommended Power: 400-500 watts
Sensitivity: 93 dB 1W/1M
Dimensions: 23"H x 15.75"W x 16.5"D Weight: 50 lbs/23 kg