$7,250.00

If you have a trade-in, request Trade-in Price.
Description

Description

At Pass Labs we build Fet amplifiers with excessive output stages, huge heat sinks and massive power supplies. We use the highest quality components in simple linear topologies, assembled and tested with care and subtlety. They measure well, sound great, and are reliable. Twenty plus years of ongoing innovation have kept the X and XA amplifiers at the forefront of high-end audio.

The INT-25 embodies all this and less. A smaller stereo Class A amplifier at a lower price, it takes advantage of the lower power requirements to have simpler single-ended circuitry and fewer parts in the signal path. This also allows elimination of degeneration, “that other negative feedback” in all stages.

Simpler and fewer gain stages improves speed and stability. Lower voltages means the ability to run gain devices at higher bias currents, more deeply into Class A. Newer power Fet technology replaces banks of parallel small transistors with a single pair of industrial devices, each having a 700 watt / 40 amp rating. With no current-hogging issues and a new constant-current bias circuit to compensate for temperature drift, they connect directly to the loudspeaker without ballast resistors for lowest possible distortion and highest damping factor. No degeneration also increases the efficiency and Class A operating current, allowing greater Class A operation into low impedance and reactive loads.

The simple front end circuit uses two pairs of our favorite NOS complementary Fets in common-source mode in a current feedback (CFA) configuration.

The preamp section is a simplified single-ended version of the one used in the INT-60 and INT-250 with three line level inputs and no line level output.

Everything done in the signal chain from the microphone to the loudspeaker, forever leaves an indelible mark on the music. The XA25 amplifier section is direct coupled requiring no DC servos or frequency compensation, neither adding too or subtracting from the experience.

As with all Pass amplifiers, the technology and construction are strictly in the service of the listening experience. The INT-25 measures superbly, but its subjective qualities are most special. In an industry where products with great specs are often found to be dry and boring, this amplifier breathes new life into the music.

Brand

Brand

Pass Labs

Pass Laboratories, Inc. was founded in 1991 by Nelson Pass, who began developing a unique prototype out of his shop at home. That prototype, a single-ended Class A amplifier, became what many acclaimed as the “amplifier of the decade.” Since its initial design, Pass Labs has become one of the most prestigious brands in the audio world. The mission of Pass Labs is “to build simple amplifiers that are distortion free and sound as good as possible.” Throughout the years, Pass Labs has forged timeless designs for their amplifiers. Most of them still incorporate a lot of the same components used during the original creations decades ago. With their patented SuperSymmetric technology, the company released the X1000 in 1998. This groundbreaking design paved the way for how Pass Labs develops models to this day. In 2017, Nelson Pass was awarded the Positive Feedback’s Lifetime Achievement to commend his incredible work on amplifier technology. In short, Pass Labs continues to break boundaries for amplifier design, improving all aspects on every release. Overture is a proud dealer of Pass Labs products, selling customers the best speakers from Pass Labs. Interested in purchasing a new Pass Labs component? You can trade-in any component towards a Pass Labs product by filling out our Trade-In Form.
Additional information

Additional information

Weight 40 lbs
Dimensions 18 × 12 × 5 in