New SP Compressor from Xotic Guitars SP compressor Guitar Effects USA is released. The SP Compressor uses the same OTA (operational transconductance amplifier) as the vintage Ross Compressor and Dyna-Comp, which many players prefer the best compressor. The SP Compressor delivers a wide variety of fine compression sounds, from exquisite Vintage sound to modern contemporary tones. Dry blend knob, volume knob (max +15dB boost), internal dip switch allows you to control attacks and flex to the sound you want to come out. External Dimensions (Length/Width/Height): 3.5 x 1.5 x 1.5 inches (89 x 38 x 38 mm) (excluding knob); Weight: 9.5 oz (260 g) (excluding battery) Current Consumption: 9VDC/5 mA; Internal Battery: 006P (9V) x 1 Power Adapter (sold separately) 9VDC Regular True Bypass Switching True Bypass Switching Input Impedance: 1M ohm