The Emperor Extreme Mono Power Amplifier



The Emperor Extreme mono power amplifier uses a large toroidal power transformer and generously rated reservoir capacitors to deliver 1,100W RMS into 4 ohms, while providing excellent dynamics and bass control


It will drive any German Physiks loudspeaker and any other makers’ loudspeakers that we are aware of. Its very large output capability ensures that it operates with a healthy power reserve, thereby reducing distortion. Large heat sinks concealed within the case allow the unit to run continuously at high power whilst remaining cool, thereby improving reliability.

Both balanced and unbalanced inputs are provided.

The unit’s gain may be adjusted in three steps via the front panel. Each gain setting provides a slightly different “voice” allowing the customer to adjust the character of their system.

The differences, while not large are intended to allow the user to tip their system’s character slightly one way or the other and so provide some correction for an imbalance. These settings are:

Gain Description
-9dB gain Warm side of neutral
Nominal gain Neutral voicing
+3db gain Analytical side of neutral



Technical excellence

The design is fully balanced  ensuring a very a very low noise floor


High voltage power supply rails for the low level signal stages and a balanced output stage ensure a very wide dynamic range, which combined with the design’s very wide bandwidth provides exceptional transparency and resolution.

The heart of an amplifier is the power supply, so great care was taken with the design to ensure that it would be able to provide the audio sections with a source of power that was as stable and noise free as possible. which carries the main power.

The low level signal section, power amplifier stage and control section all have their own independent toroidal power transformers. These were chosen for their low external magnetic fields. To minimise the effects of stray magnetic fields, all three transformers are housed in their own screened enclosures.

The amplifier’s incoming mains power is not routed through the power switch, as these can have a detrimental effect on the sound.

This is especially so with very high power amplifiers. Instead, this switch supplies power to the standby circuit and when the front panel On button is pressed, this turns on a high current relay which carries the mains power.

When a large power supply is connected to the mains supply, the initial in-rush current can be high enough to trip circuit breakers or blow fuses. To prevent this, a 4-stage soft start circuit allows the power supply to “slowly” charge before it is switched out of the circuit. This also reduces the stress on the power relay.

High quality power supply capacitors are used with additional decoupling capacitors located physically as close as possible to where they are needed in the circuit.

Great care was also taken with the internal grounding to prevent the introduction of noise



Easy to use

A large front panel display provides a clear indication of the gain setting and unit status


Premium grade WBT loudspeaker terminals provide a reliable and high quality connection and are also easy to secure and release.

A ground lift control allows the signal ground to be disconnected, which can be helpful in reducing mains hum caused by earth loops. This may be operated using the remote control that is supplied with the preamplifier.





The Emperor Extreme mono power amplifier is designed and manufactured in Germany.  To ensure excellent sound performance and high reliability, great care and attention has been devoted to all stages of production: from the initial design to component selection and final manufacture


Before a single component was soldered, many hours were spent carrying out detailed computer modelling, in order to optimise the technical performance of the various sections of the design. All the components were selected for both their technical excellence and reliability. To further enhance the reliability, all components are operated well within their maximum limits. The final selection of components and topology was made on the basis of exhaustive listening tests, as well as detailed measurements.

Great attention was also paid to the aesthetics and the mechanical construction. This is a very high quality product, so the look and build quality had to be of a commensurate level. The construction uses an internal steel chassis with a 15mm thick silver anodised aluminium outer case.

This provides magnetic screening, together with structural rigidity to minimise the effects of external vibration. The fit and finish of the chassis is first class, reassuring the user of the high level of quality that this product offers. 

Before dispatch, each unit is given a prolonged burn-in run before being subject to an intensive battery of electronic tests. Only when it has successfully passed these and been given a final physical inspection is it judged ready to be sent to the custom.


Product Specifications

Output power (Both channels driven)
550W RMS into 8 ohms
1,100W RMS into 4 ohms
1,800W RMS into 2 ohms

Frequency response
0.5Hz to 80kHz (-3dB)
1W into 8 ohms

THD + Noise
0.008% (22Hz to 22kHz)
1W into 8 ohms

Maximum dynamic range
129 dB

Signal to noise ratio
- 91 dB A
A weighted @ 1W into 8 ohms
Balanced input

Unbalanced x 1 pair
Balanced x 1 pair

Output Terminals
2 pairs of high quality WBT screw terminals per channel

Input select
Gain select
Ground lift
Display on/off

Optional accessories
Infra red remote control

Other information
Trigger input & output for remote operation
Custom cable used for internal wiring

Silver anodized aluminium 

474 mm W x 300 mm H x 474 mm D


5 years

As part of our process of continually improving our products, we reserve the right to change specifications without notice.



Emperor Models

(click on a product image below to find out more)