Pass Labs

Pass Labs X600.8 600 Watt Monoblock Power Amplifier Review

With the success of the Pass Labs Xs series, Nelson Pass set out to create a line of additional power amplifiers that have most of what the Xs series has, but at much more affordable prices. The model under current review is the X600.8, which is a monoblock specified at 600 watts RMS output, with the first 50 watts in Pure Class A, and the rest in AB. Do they sound close to the Xs amplifiers? Read on.

Pass Labs INT-30A Pure Class A Integrated Stereo Amplifier

Recently, we reviewed the Pass Labs INT-150 integrated amplifier, which is biased into Class A at about 5 watts, and leaves Class A into Class AB at 10 watts peak. It is a superb integrated amplifier. The INT-150's brother, the INT-30A integrated amplifier, is Pure Class A throughout its 30 watt output (into 8 ohms) specification. Chris Eberle originally reviewed the INT-30A in 2012, and in this review, I compare the INT-30A with the INT-150, and add bench tests which were not in Chris' review.

Pass Labs INT-150 Integrated Stereo Amplifier

Pass Labs is renown for their high end preamplifiers and power amplifiers, but they also have integrated amplifiers as well, which include the INT-30A and the INT-150. Here, we review the INT-150, which, as you can imagine from the model number, outputs 150 watts x 2 (into 8 ohms). It has the same massive build quality as the other Pass components I have reviewed, and also, its own distinctive sound, as I have found with the others.

Pass Labs XP-10 Stereo Preamplifier

 In the past, we reviewed the Pass Labs XP-20 and XP-30 stereo preamplifiers. Now, we come full circle with a review of the remaining member of their preamplifier trio, the XP-10, which is the least expensive model. It is fully balanced, and has a slightly different sound character compared to the other two, which also sound different from one another. All three are great products, so you can choose based on price and/or sound characteristics.



Pass Labs INT-30A Integrated Stereo Amplifier

For nearly forty years, Nelson Pass has been designing simple, high-performance electronics. In 1991, with twenty years experience under his belt, he founded Pass Laboratories which has since become among the most highly regarded companies for high-end power and integrated amplifiers. His design goals couldn't be more clear: power, simplicity and performance.