Pass Labs · X Series
$11,550
On demonstration in our Portland showroom
Pass Labs · X Series
The X series stereo amplifier most Pass Labs systems are built around: 250 watts per channel, 56 output MOSFETs per channel, and nearly a decade of refinement behind the circuit.
Enjoy the Music Legendary Performance award, 2020.
Authorized Pass Labs dealer · Delivery and installation by Pearl Audio · Trade-ins welcome
The story
The X250.8 is the step up from the X150.8 in power and in parts: 56 power MOSFETs per channel on a 9-inch-tall heatsink chassis, rated at 250 W into 8 Ω with a damping factor of 150 and a supply that draws 500 W at idle. Like every Class AB .8 amplifier it carries a substantial Class A bias, so the first watts are delivered in Class A and the output stage moves into AB only on peaks. The front end is the balanced .8 circuit with constant-current sourcing and precise voltage references, and the inputs are XLR and RCA at 100 kΩ and 50 kΩ.
Enjoy the Music's Tom Lyle, reviewing the X250.8 with the XP-17 phono stage, heard a major improvement over the previous-generation Pass amplifier it replaced despite its lower rating, and the magazine gave the X250.8 a Legendary Performance award in 2020. Pass describes the amplifier's character as substantial power with a natural tonal balance and dimensionality that holds up through dense mixes and large dynamic swings.
The X250.8 suits most loudspeakers in most rooms, which is why it anchors so many Pass systems. The XP-22 is its natural partner, with the XP-12 as the single-chassis alternative. The X350.8 adds 100 W and 16 more devices per channel for harder loads.
Silver is the standard finish shown. Black is available to order at additional cost; ask us for a quote.
| Type | Stereo power amplifier |
| Class of operation | Class AB, with Class A bias at low output |
| Power output (8 Ω) | 250 W per channel |
| Power output (4 Ω) | Not published by Pass Labs |
| Gain | 26 dB |
| Input for full power (26 dB gain) | 2.24 V |
| Frequency response | 1.5 Hz – 100 kHz (Pass Labs spec) |
| Input impedance | 50 kΩ single-ended; 100 kΩ balanced |
| Damping factor | 150 |
| Output devices | 56 per channel |
| Inputs | Balanced XLR and single-ended RCA |
| Outputs | Speaker binding posts |
| Power consumption at idle | 500 W |
| Standby power | Less than 1 W |
| Dimensions (W × D × H) | 19 × 21.25 × 9 in |
| Weight | 100 lb |
| Sold as | Single stereo amplifier |
The middle of the X series stereo amplifiers.
The matching preamplifier is the Pass Labs XP-22.
Plan your Pass Labs system with Pearl Audio
Pearl Audio is an authorized Pass Labs dealer. Arrange an audition in our Portland showroom and we will help with loudspeaker matching, delivery and setup. Call (503) 222-2599 or email sales@pearlaudio.com.
The Pearl Audio experience
A system at this level should be heard, thoughtfully matched, and properly set up. From the first audition to long-term ownership, you work with the same people, in person.
Hear the X250.8 Amplifier by appointment in one of our two purpose-designed demonstration rooms, with your own music and time to compare without pressure.
We deliver and install throughout the Portland area, taking care of placement, connections, ventilation and system configuration ourselves.
We support everything we sell for as long as you own it, whether the answer comes by phone, in your home, or through factory service.
Trade-in assistance and qualifying 100% Trade-Up options give you flexibility when your listening priorities or your system change.
