INT-150

About the INT-150

The Pass Labs INT-150 integrated amplifier combines the power section of the X-150.5 amplifier with the signal path and volume control technology from the XP-10 preamplifier. It features a fully balanced topology with Pass Labs' patented Super-Symmetry circuit, which enhances common-mode noise rejection and reduces distortion by making distortion artifacts identical for cancellation. The amplifier delivers 150 watts RMS per channel into 8 ohms and 300 watts into 4 ohms, operating up to 10-15 watts per channel in Class A before switching to Class AB. It uses 20 MOSFET output devices per channel and a low feedback, fewer-stage design for high transparency and dynamic range. The front panel is minimalist with six buttons for input selection, mute, and power/standby, plus a large volume knob with 1 dB steps over a 63 dB range. The rear panel includes balanced XLR and unbalanced RCA inputs and outputs, speaker binding posts designed for spade connectors, and a grounded three-pin AC receptacle. The amplifier measures 19" W x 7" H x 19" D, weighs 60 pounds, and has a frequency response from 1.5 Hz to 60 kHz (-3 dB). It has a damping factor of 150 and a slew rate of ±50 V/µs. The INT-150 is known for its robust build, excellent bass performance, wide soundstage, and ability to handle high-resolution music with low distortion (0.003% at 5 watts). It is