RESTEK EXTRACT MONO POWER AMP High End Made in Germany.

RESTEK EXTRACT MONO POWER AMP High End Made in Germany.

High musicality, excellent ergonomics and timeless modern design

The increased quality of modern program sources also increases the demands on hi-fi amplifiers . A mono power amplifier of the absolute top class like the RESTEK EXTRACT not only meets these requirements in terms of measurable top data, but even more so in terms of its tonal characteristics. It should be as easy to use your music system as it is to use an ordinary light switch. And the device should also meet the highest aesthetic criteria. We have therefore banished all operating elements that are not used every day from the front to the rear.

The advantages of mono power amplifiers

A mono output stage is the ideal case with regard to the spatial distribution of power output stages for stereophonic or multi-channel playback. The powerless output signal of the preamplifier is routed to the immediate vicinity of the loudspeakers using symmetrical or asymmetrical connection cables. Only there is the signal amplified with the power output stage and adapted to the impedance ratios of the loudspeakers. In this way, the supply cables to the loudspeakers can be kept extremely short and the electrical and sound losses can be kept as small as possible. This is particularly important when the impedance of the loudspeakers used falls below a value of around 4 ohms.

Crosstalk between the two stereo channels is also completely ruled out due to the physical separation of the two power amplifiers. Especially with power amplifiers, this factor should not be underestimated!

Some notes on the technology of the RESTEK EXTRACT mono power amplifiers

The circuit technology within the output stage is divided into four areas:

• The amplifier stages, i.e. voltage amplifier (driver stage) and current amplifier (output stage)
• Operating and protection electronics to control and manage all functions.
• Instrument and status indicators for user information.
• Power pack for powering the entire device.

The amplifier stages must be designed for sufficient output power, which can mobilize sufficient power reserves at any time, even under extreme load conditions. This ensures that the power amp is eliminated as a source of possible distortion, even during large dynamic peaks. The tonal and metrological quality of the power amplifier is consistently good within the designed performance range.

The output stage works according to the parallel-symmetrical principle and has a cascade circuit in the input stage that controls eight output transistors via the driver stage. As a result, the RESTEK EXTRACT power amplifier is able to drive loudspeakers down to a minimum impedance of 2 ohms without any problems. More than 400 watts can be emitted.

Optimal ergonomics and timeless modern design

With the exception of the on/off switch, the operating elements have been relegated to the back of the device, which also has the advantage that the signal paths in the device can be kept short and thus the susceptibility to faults can be kept small.

In order not to leave the user in the dark about the current state of the power amp, the EXTRACT has an informative display field. The large VU meter, whose backlight can be switched off, is particularly eye-catching. This instrument informs the user at all times of the current output voltage present at the output. To give an indication of the power output, we have scaled the scale for an 8 ohm speaker.

The four LED displays on the front show the operational status of the power amplifier. The standby power pack supplies the switch-on electronics with low internal energy consumption as soon as the device is connected to the mains.

The design of the EXTRACT mono power amplifier fits perfectly with the other devices in the high-quality RESTEK E series .

Features of the EXTRACT power amp from the E series

• Mirror symmetrical circuit design
• Central performance gauge
• Balanced and unbalanced inputs
• Overtemperature and offset monitoring
• Can be switched on remotely via the preamplifier
• cold light lighting
• German manufacturing

Technical specifications

• Sine output: 180 watts at 8 ohms; 300 watts into 4 ohms
• Music power: 200 watts at 8 ohms; 350 watts into 4 ohms
• Frequency response: 5 Hz … 150 kHz at -3dB
• Harmonic Distortion: <0.007%
• Signal-to-Noise Ratio: >110dbA
• Rise time: < 2 usec
• Slew Rate: >40V/usec
• Damping factor: > 250 ( 8 Ohm 1kHz )
• Input Sensitivity: 2V rms
• Input Impedance: 47K ohms unbalanced, 10K ohms balanced
• Dimensions (WxHxD): 240 x 155 x 395 mm
• Weight: about 14 kg
• Finishes Case: Black
• Front designs: high-
  gloss polished acrylic glass, brushed black, champagne or silver matt aluminium, chrome-plated brass and special designs on request

Subject to change

More information about the RESTEK EXTRACT power amplifier

User manual RESTEK EXTRACT power amplifier 

Product sheet RESTEK EXTRACT power amplifier 

Εταιρία