CH Precision - M1 2-Kanal Endstufe

M1 - 2 Kanal Endstufe (2 x 200W RMS 8Ω) - Es gibt einfach nichts besseres!

Der CH Precision M1 ist das aller feinste in analoger verstärkungstechnologie. Er ist auch unendlich flexibel und konfigurierbar. Im MONO bridged Modus bietet er 700 Watt Dauerleistung unter 8 Ohms!

Alle fantastischen CH Precision Musik Instrumente werden in der +Schweiz+ entwickelt und gebaut.

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45'100.00 CHF

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Technische Daten

Height266 mm
Width440 mm
Depth440 mm
Weight75 kg

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M1 - 2 Kanal Endstufe - DER Leistungsstärkste

Die Fähigkeit, die qualitativ hochwertigsten Aufnahmen von heute wahrheitsgetreu und genau zu reproduzieren, war noch nie so schwierig. Nur wenn jedes Element der Reproduktionskette in der Lage ist, die Zeit- und Ebeneninformation der Musik präzise nachzubilden, kann eine echte Emotion gefühlt werden.

Der leistungsstärkste Verstärker der M1, CH Precision 1 Series wurde in diesem Sinne entwickelt. Die bahnbrechenden technologischen Fortschritte, die auf dem A1 implementiert wurden, wurden weiter verfeinert, unter anderem die ExactBias-Schaltung und eine feinere Lautsprecherabstimmung.

Angegeben mit 200W RMS in 8Ω im Mono-Modus, 2x 200W RMS in 8Ω in Bi-Verstärkung / Stereo und 700W RMS in 8Ω im Bridge-Modus, beherbergt der M1 einen dedizierten 2200VA Power-Transformator, der die Endstufe mit reichlich Energie versorgt mühelos die anspruchsvollsten Lautsprecher antreiben.

Technische Eigenschaften:

Modularity

The M1 power amplifier was developped with modularity in mind. It can be equipped with a single analog input board in case the M1 is used for a single channel. This modularity ensures the following operation modes:

  • Single channel mode
  • Passive bi-amplification mode
  • Active bi-amplification mode (requires a second Analog Input Board)
  • Bridge mode
  • Stereo mode (requires a second Analog Input Board)

Changing the M1 operating mode has been made easy and can be done on-the-fly from the front panel user interface. Only the available options are permitted depending on the hardware configuration.

Power Supply

The central power supply is taking most of the internal space inside the chassis. The huge 2'200VA transformer is mounted on silent-blocks to drastically reduce vibrations transmission into sensitive parts of the circuitry. It is shielded both with a magnetic and an electrostatic screen. The transformer's plate is also secured for transportation.

For optimum thermal performances, the output stage diode bridges are mounted on the front panel inside the chassis and are of hyper-fast soft-recovery type.

The filtering capacitors are 4-poles types, which ensures that the in-rush current flowing through the rectifiers to refill the capacitors is kept away from the central ground point.

Analog stages

All analog stages inside the M1 are built only with discrete components, no operational amplifier have been used into these sections. This deliberate choice warranties the shortest audio signal path and allows the use of custom-made building blocks.

No capacitors have been used in the signal path, nor any output relay to ensure maximum transparency.

Gain

A gain range of 24dB - in 0.5dB steps - is embedded in each channel, for a perfect match with the loudspeakers' sensitivity and room size. A lower gain is typically preferred for high-sensitivity speakers into a small room while a bigger gain is sometimes needed for large room with low-sensitvity loudspeakers.

This gain adjustment can also be useful with multi-amplified loudspeakers to adjust the level of the various drivers independently.

Output stage feedback

Unlike all other CH Precision's analog stages, the M1's output stage can be configured to have some global feedback. The global versus local feedback ratio is adjustable on-the-fly from the front panel user interface, only a few relays are switched during this operation. Ranging from 0% - local feedback only - to 100% - global feedback only, in 10% steps.

Independent feedback ratios can be set in bi-amplification modes.

Output stage bias

In order to keep the output stage distortion constant over time, the output stage's bias must be kept as constant as possible. The bias is highly dependent on the output stage internal temperature - the transistor die - which can be known thanks to ThermalTrak devices from OnSemiconductor.

A very special circuit was built around the output stage which is taking into account both the temperatures of the heatsink and the transistors' dies. It allows the amplifier's output stage to keep its bias constant independently of the musical program and the room temperature.

In term of performances, the M1 class-AB design is outperforming a pure class-A design with usual bias compensation. This schematic is patent-pending.

Protections

Each channel's output signal is permanently monitored - both in voltage and current - processed by a DSP, which computes in real-time the effective channel's output power.

If an abnormal situation arises, the amplifier is immediately turned off to secure the connected loudspeakers. No output relay have been used into this amplifier, its symetrical structure allows a smooth turn-on and turn-off of the power supply without noticeable noise.

Analog inputs

Inputs typeBalanced (XLR), one connector per board
Single-Ended (RCA & BNC), one connector per board
Input impedance        Balanced: 94kΩ
Single-Ended: 47kΩ or 300Ω
Input stageJFET input stage
Ultra-low noise, discrete fully differential stage
24dB range adjustable gain in 0.5dB steps

Amplification

Amplification stageUltra-low noise full discrete class AB design
6 pairs of complementary output transistors
Ouptut power2x 200W / 8Ω, 2x 350W / 4Ω, 2x 600W / 2Ω in stereo and bi-amp modes
1x 350W / 4Ω, 1x 600W / 2Ω, 1x 1100W / 1Ω in monaural mode
1x 700W / 8Ω, 1x 1200W / 4Ω, 1x 1600W / 2Ω in bridge mode
BiasPatent-pending bias circuitry for constant bias operation
FeedbackUser-adjustable local vs. global feedback ratio, from 0% to 100% in 10% steps 
BandwidthDC to 450kHz (-3dB) at 1W into an 8Ω resistive load
Signal to Noise RatioBetter than 115dB in stereo and bi-amp modes
Better than 118dB in bridge mode
Total Harmonic Distortion + NoiseLess than 0.1% with 0% global feedback
Less than 0.01% with 100% global feedback

Analog outputs

Binding posts                                Two pairs of Argento binding posts for loudspeakers connection
MonitoringNon-intrusive DSP-based protection of the amplifier and connected loudspeakers
Instantaneous voltage & current values are permanently monitored on each channel
ProtectionsShort-circuit protected
Disconnected loudspeaker detected
Over-temperature of the heatsink
Over-temperature of the output transistors

Power supply

Transformer2'200VA toroidal transformer for output stages, oversized for low-noise operation
100VA separate toroidal transformer for input stages 
Power capacitors                         2x 100'000uF/100V 4-poles capacitors 
RegulatorsNon-regulated symetrical power supply for the power stages
Eight local regulation stages for input/driver stages
Seven local regulation stages for the logic/display

General

Display480x272 pixels, 24bits color, AMOLED
Mains operationSelectable 100V, 115, 230V AC, 47-63Hz
Fuses value and locationStandby fuse (white holder): 250mA T (230V AC), 500mA T (100V AC, 115V AC)
Audio (mid power) fuse (black holder): 1.6A T (230V AC), 3.15A T (100V AC, 115V AC)
Power fuse (IEC20 holder): 16A T (230V AC), 32A T (100V AC, 115V AC)
Power supply consumption           <1W (standby), 2200W max in operation
Remote controlEthernet based system control via the Android CH Control App

Options boards

CONTROL

 ethernetcontrol

Ethernet control board

General control board. Provides USB based firmware update and external ethernet control.

Factory built-in

ANALOG_BUF

analogmono

Monaural analog input buffer board

Three analog inputs - XLR, RCA and BNC - are provided on a single board. A pass-through XLR male connector allows a direct connection to another A1 amplifier.

Can be factory ordered for Left or Right channel.

Factory built-in (1x), second board is needed for stereo operation

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CH Precision - M1 2-Kanal Endstufe

CH Precision - M1 2-Kanal Endstufe

M1 - 2 Kanal Endstufe (2 x 200W RMS 8Ω) - Es gibt einfach nichts besseres!

Der CH Precision M1 ist das aller feinste in analoger verstärkungstechnologie. Er ist auch unendlich flexibel und konfigurierbar. Im MONO bridged Modus bietet er 700 Watt Dauerleistung unter 8 Ohms!

Alle fantastischen CH Precision Musik Instrumente werden in der +Schweiz+ entwickelt und gebaut.

Eigene Bewertung verfassen