PMG Signature · Stereo

The new S200
Stereo.

200 watts/ch · 4Ω Power
10W/CHClass A bias >500 kHzBandwidth 20%In Class A
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PMG S200 Stereo
  • PMG S200 Stereo
  • PMG S200 Stereo
  • PMG S200 Stereo
  • PMG S200 Stereo
href="/products/pmg-s200?variant=51635812860194" class="link" >PMG S200 Stereo

The S200 is where the PMG Signature Series begins. One hundred watts per channel into 8 ohms, doubling into 4, drawn from the same state-of-the-art active power supply architecture that defines the entire Signature line. The same 50 watts of Class A bias per channel. The same bandwidth beyond 500 kHz. The same flat distortion. The same strikingly low feedback.

This isn’t an entry-level amplifier with the Signature name borrowed. It’s the full Signature topology, scaled for systems and rooms where the M800’s reserves would never be tapped.

For listeners building a reference system gradually, the S200 is where the journey starts. For listeners with efficient loudspeakers in a dedicated room, it may be everything they ever need.

Designed by Darren Myers. Engineered by Bob Stadtherr. Hand-built in Boulder, Colorado.
$7,999.00
PMG S200 Stereo

Design

Darren Myers's PMG Signature topology in a stereo chassis: a state-of-the-art active power supply, 10W of Class A bias per channel, bandwidth exceeding 500 kHz, and a strikingly low overall feedback architecture. Engineered by Bob Stadtherr. Hand-built in Boulder, Colorado.

Application

100 watts into 8 ohms per channel, doubling to 200 watts into 4 ohms per channel, with Class A operation across roughly 20% of typical listening. Drives the loudspeakers most listeners actually own — from monitors to mid-sized floorstanders — with PMG Signature transparency.

Overview

The power amplifier is the last component the music passes through before reaching your loudspeakers, and its role in preserving the recording's essential character is often underestimated. Overtones, transient decays, spatial cues, the subtle phase relationships that tell your ear where each instrument is placed in a room — all of it can be quietly degraded by an amplifier that is otherwise specified well. The S200 was designed against the same single conviction that drives every amplifier in the PMG Signature Series: the power stage should add nothing and lose nothing.
The S200 is where the PMG Signature Series begins. One hundred watts per channel into 8 ohms, doubling into 4, drawn from the same state-of-the-art active power supply architecture that defines the entire Signature line. The same 10 watts of Class A bias per channel, the same bandwidth beyond 500 kHz, the same flat distortion profile, the same strikingly low overall feedback.
This is not an entry-level amplifier with the Signature name borrowed. It is the full Signature topology — the same Darren Myers design, engineered by Bob Stadtherr, hand-built in Boulder, Colorado — scaled for systems and rooms where 100 watts per channel is more than the music will ever ask for.

Active Power Supply

A power amplifier is, fundamentally, an interface between a reservoir of energy and the loudspeaker. The character of that reservoir — how cleanly it stores energy, how instantly it can deliver it, how silent it is at rest — determines more about how an amplifier sounds than any other single design choice.
For half a century, the high-end audio industry has approached this with passive supplies: large linear transformers feeding banks of electrolytic capacitors. The approach works. It also imposes real limitations. The transformer is the slowest element in the amplifier's signal path. The capacitors store charge but cannot return it without ripple. The rectifier introduces switching noise every time it transitions. And the entire arrangement is sized for a peak demand it will almost never actually see.
The S200's two channels each draw from their own state-of-the-art active power supply rail. Sized to deliver 100 watts per channel into 8 ohms, doubling into 4, the supplies preserve every quality that defines the Signature Series: instant transient response, a vanishingly low residual noise floor, total grip on the speaker, full continuous output without sag. Channel separation is preserved by the dual-mono architecture.

Output Stage

The relationship between an amplifier's output stage and the feedback applied around it is one of the most consequential decisions in amplifier design. Heavy feedback can drive measured distortion to near zero on a steady-state test signal — but it does so by constantly correcting the signal, and that correction has costs the spec sheet won't tell you about. Transient response suffers. The amplifier loses its sense of immediacy. The music starts to feel like a reproduction rather than a performance.
The S200 takes the same approach as every other amplifier in the Signature Series. Distortion stays uniformly low across the entire audible band, achieved with strikingly low overall feedback. Each channel is biased for 50 watts of pure Class A operation, which means that for 99% of normal listening, every transistor in the signal path is operating in its most linear region. The same architecture, the same musical priorities, the same build quality — at the Signature Series' most accessible point of entry.

THD vs frequency

Laboratory measurements across representative loads.

8Ω load
4Ω load
No load

Why flat matters

For more than fifty years, almost every solid-state amplifier has shared the same quiet flaw: distortion that rises with frequency, beginning around 4 kHz and often climbing 20dB or more by the top of the audio band. On a highly resolving system, you hear it as hardness on cymbals and a glaze on the top octaves. The usual fix — wrapping the amplifier in heavy global feedback — pushes the number down, but flattens the soundstage and collapses the natural dimensionality of the music. Darren Myers refused that trade-off. The PMG Signature topology holds distortion remarkably flat across the entire audio band, with only the gentlest rise at the very top — and without the heavy feedback that two-dimensionalizes the sound. What the graphs show, your ears confirm.

Features

7 key features

100 watts into 8Ω per channel, doubling to 200 watts into 4Ω per channel

10W Class A bias per channel

Bandwidth exceeding 500 kHz

Strikingly low overall feedback architecture

State-of-the-art active power supply

Designed by Darren Myers

Engineered by Bob Stadtherr

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Specifications

Technical details
Unit Weight 56.2 lbs / 25.5 kg
Unit Dimensions 16 in L × 17.5 in W × 8 in H (406.4 × 444.5 × 203.2 mm)
With feet & binding posts: 16.75 in L × 17.5 in W × 8.75 in H
Shipping Weight 68 lbs
Shipping Dimensions 23.5 × 23 × 15 in / 596.9 × 584.2 × 381 mm
Input Power Auto Voltage: 120VAC or 230VAC, 50 or 60 Hz
Power Consumption Standby (Ready): <2W  |  Idle: 180W  |  25W/4Ω: 360W
Fuses No user serviceable fuses
Audio Inputs RCA (Single-ended): 1 pair  |  XLR (Balanced): 1 pair
Speaker Outputs Silver Plated Binding Posts: 4 pair
Trigger Input: 3.5mm, 5–15VDC  |  Output: 3.5mm, 12VDC
Gain 26.2 dB
Sensitivity 1.4V
Power Output 100W/ch into 8Ω, 200W/ch into 4Ω (1kHz, <1% THD)
Class A Power Output 10W/ch into 8Ω
Frequency Response <10Hz – 80kHz (±0.25dB)
Input Impedance 100kΩ Single-ended  |  200kΩ Balanced
Bandwidth >500kHz
THD <0.002% typical (20Hz–20kHz, 1W/8Ω)
Damping Factor >240 at 8Ω (20Hz–1kHz)
Crosstalk >90dB at 1kHz

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