Phasemation · Power amplifier and preamplifier system

SA-1500
& CM-1500

The expression of the 300B.
The finesse of a passive preamplifier.

My view on this product

Cet ensemble offre une restitution vivante, fluide et riche en couleurs, avec des voix incarnées et des timbres d’une grande finesse. La transparence laisse entendre les nuances les plus délicates, tandis que les instruments se déploient dans un espace ample et profond. Le grave conjugue netteté et présence, donnant à la musique une assise solide. Les contrastes dynamiques s’expriment avec spontanéité, dans une écoute naturelle, expressive et pleine d’émotion.

Phasemation SA-1500, détail des circuits intérieurs

The SA-1500 used as a power amplifier through its Direct input, controlled by the CM-1500.

The design in detail

Technical specifications

Configuration	Stereo SA-1500 + CM-1500 hybrid passive preamplifier
Amplification	Single-ended 300B · pure Class A · no negative feedback
SA-1500 power output	2 × 9 W / 4 Ω (THD 5 %)
Valves and transformers	300B · 6SN7 driver stage · Lundahl output transformers
SA-1500 frequency response	10 Hz – 40 kHz (+0 / −3 dB)
CM-1500 inputs	3 RCA pairs + 2 XLR pairs
CM-1500 outputs	2 RCA pairs + 2 XLR pairs
CM-1500 gain	−10 dB / 0 dB / +6 dB
SA-1500 dimensions	430 × 240 × 380 mm (W × H × D) · 18 kg
CM-1500 dimensions	430 × 93 × 362 mm (W × H × D) · 6,5 kg

CM-1500 documentation ↗

View the manufacturer’s documentation ↗

Different perspectives

In the press

LP Magazin

You can buy much cheaper 300B amplifiers… but you would not get to where phasemation with the SA-1500 has arrived.

Transparency, immediacy, crisp bass and the voices are firmly in the room. It also works out the dynamic differences in vocals fantastically and shows my Air Tight ATM4 their limits.

Fine-grained, sparkling, dynamic and full-bodied – a truly dream combination.

More detail, more space, more tonal colour. This is truly magnificent sound.

It also reproduces the dynamic contrasts in the vocals fantastically. Its true class is simply undeniable.

Christian Bayer

Fidelity

I have indeed very rarely experienced such a competent and at the same time powerful 300B integrated amplifier.

The SA-1500 reveals itself here as an ideal mediator – a musical all-rounder.

this amp can play along in a relaxed, laid-back manner, and on the other, it can strike lightning-fast out of nowhere when the dynamic jumps on the respective recording demand it.

The SA-1500 mastered the entire musical program described here in a virtually perfect performance that left a lasting impression on me.

Alexander Aschenbrunner

Stereo / Analog

First among preamplifiers costing less than 1,200,000 yen.