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pow-amp 4M

Analogue 4-channel PWM power amplifier with 1000 watts max. continuous system power

Product describtion

Based on the proven technology of our classic pow-amp, the product family has been expanded to include a modular, scalable power amplifier in three variants and with up to four channels: The pow-amp 4S realises a stereo power amplifier with half the power of the pow-amp and offers the most affordable entry into the special sound world of our pow-amps. The pow-amp 4 adds a second identical stereo branch, providing four channels with an identical total system output compared to the pow-amp. The pow-amp 4M has the same dual-mono design as the classic pow-amp– with identical system performance. This differs from the pow-amp 4 variants in that it has a more complex input stage (direct button, RCA option), power supply and premium components in the output filter.

With analogue pulse width modulation (PWM), we use a relatively new operating principle for our pow-amps. As it makes it possible to build powerful yet compact amplifiers, it only found its way into large-scale industrial production. However, if this working principle is put to the uncompromising service of maximum transmission quality, results can be achieved with the process that would be very difficult or impossible to achieve with conventional technology: It combines the speed and finesse of the tube with the power and low distortion of transistors.

Another advantage of this working principle is its high energy efficiency. It breaks through the paradigm of conventional amplifier designs, according to which good devices are large and heavy and produce a lot of heat in order to serve the “power-hungry” loudspeakers. We measured it ourselves: One hour of listening to music with the pow-amp consumed only 60W/h even with the most power-hungry 3-ohm speakers at a deafening volume. Yes, even if pulse power of up to 1000 watts is possible, music is very dynamic and on average only a fraction of this is actually required over time. In comparison, a 35 watt Class A power amplifier can “burn” 200W/h just through quiescent current, i.e. without any music at all.

Gallery

Equipment and information

Impedanzanpassung

As it is known that there are different impedances - usually between 4 and 8 ohms - an adjustment to the speaker impedance can be switched on the rear of the device. This individual adjustment linearises the time response of the filter in particular.

Fully balanced analogue signal processing

After the input stage, the audio signal remains balanced throughout until it reaches the power amplifiers. These output the signal symmetrically again, and then the output filters and speaker outputs are also symmetrical again. This results in a higher signal-to-noise ratio and greater immunity to interference of any kind.

Output filter

Only at the output of the amplifier does a filter turn the PWM signal into the modulated oscillation that needs to be passed on to the loudspeaker. This step is crucial for the quality level.

Rated power: 2 ohms: 1000 watts; 3 ohms: 600 watts; 4 ohms: 450 watts; 8 ohms: 300 watts; power reserve of the power supply at all impedances: 1000W continuous

2 analogue inputs, level up to approx. +21 dBu max., transformer-balanced, impedance 10kΩ, XLR

+10dB switchable input sensitivity

2 analogue outputs via Mundorf gold screw terminals

Frequency response: 20 Hz – 87 kHz

Power supply unit:

  • shielded mains transformer + input filter + 1000W SNT
  • Input voltage EU version: 230 Volt, 50 Hz (stand-by <0.5W)
  • Input voltage US version: 115 Volt, 60 Hz (stand-by <0.5W)

Dimensions: 450x139x315mm (housing) or with feet 450x146x315mm (WxHxD)
Weight: 14kg

We reserve the right to make changes to technical data and equipment.

Press reviews

And this is what others say about us...
Andreas Wenderoth
Andreas Wenderoth
Image Hifi
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„Musik in ihrem Gesamtzusammenhang erfahrbar machen …. das leistet er besser als jede andere Stereo-Endstufe, die ich bisher in meinem Hörraum hatte.“
Frank Hakopians
Frank Hakopians
fairaudio
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… im eigenen Hörraum hat noch kein Musikserver-D/A- Wandler-Gespann entfesselter aufgespielt als mu-se und dac-pre reference.“
Marco Kolks
Marco Kolks
Hörerlebnis
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„Der pow-amp zählt für mich – unabhängig von der Preisklasse – zu den besten Endstufen, die ich gehört habe.”
Ralph Werner
Ralph Werner
fairaudio
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„… wenn Sie tonale Ehrlichkeit, hohe Auflösung und „Reinheit“ des Klangbildes schätzen und …nach einem Dynamik-Boost für Ihre Anlage suchen, sind Sie mit diesem Verstärker an der genau richtigen Adresse. Was für ein Debüt!“
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