It's been a while since I've had an opportunity to listen to some of the Pass amps officially. The last one was, if memory does serve me, an integrated INT-30 amplifier, a review you had the opportunity to read in this magazine (No. 81 / 2010). My experience with Pass Labs amps is not extensive, but it may be relevant. Before that integrated amplifier in my listening room I enjoyed my own amps over the years, such as integrated amplifier INT-150, power amp x150.5, preamplifier X1 and Aleph P. Either loaned to me, or through other familiar listening rooms, I also had the opportunity to listen to X250, X 250.5, X350, X600, X150, Aleph 3 and Aleph 5. As you can see from the above, there is a certain historical void in my acquaintance with Pass, which we will try to fill in by listening to and learning about the latest Pass Labs toy, the Pass INT-25 integrated amplifier.