Ref. No  Description Price (Inc. UK V.A.T.)
Extreme 1000 1000W Active Sub Bass Panel
The Extreme 1000 Sub Bass Amplifier - Lightweight, Powerful, Efficient, Controllable

Discontinued -

The Extreme 1000 is our latest sub bass plate amplifier and it boasts a full 1000W RMS into 4 ohms and 2000W peak, delivered by a state of the art Class D amplifier. This is quite a feat for a class D amplifier as they tend to over protect and turn themselves down under the slightest load. This is not the case with the Extreme 1000 as can be seen by the Oscilloscope display below.

The Extreme 1000 is therefore very powerful but power is nothing without control so we have included all the usual controls that BK Subwoofers have become renowned for, plus we have added an Auto On function that automatically turns the subwoofer on if it detects a signal and turns itself into standby when no signal is detected after 15 minutes.

Controls include High Level Volume, Low Level Volume, Filter By-pass, Low Pass Filter adjustable 40 to 120hz and a fully adjustable phase control.

Because this is such a powerful amplifier we have also included a high pass filter to protect the drive unit, this is set at 15Hz / 24dB Oct but can be adjusted within reason or removed. Please specify your requirement when ordering by using the comments box at the bottom of the order page.

By using a highly effecient Class-D amplifier typically 85% and and Auto On / Off circuitry the Extreme 1000 is energy effecient and comes with green credentials


Features :-

  • Phase Shift Continuously variable 0 - 180Deg
  • 1000W R.M.S. Into 4 Ohms - 2000W Peak
  • High and Low level inputs with separate gain controls
  • Upper roll off is continuously variable between 40Hz and 120Hz
  • Filter Bypass switch, for use with sub outs from processors
  • Airtight construction
  • Auto standby feature
  • Short Circuit Protection
  • 4mm Thick Aluminium Front Panel
  • 15Hz high pass filter 24dB/Oct
The Extreme 1000 Inputs and Controls

The Extreme 1000 includes all the features that our sub bass amplifier have become known for, from left to right we have:-

  • High Level Input - Connects to amplifier speaker terminal
  • High Level Gain - Volume control for the High level input
  • Low Level Gain - Volume Control for the ow level input
  • Low Level Input - Connects to either a Stereo pre-amp or from the sub out from an AVR
  • Filter By-pass - By-passes the filter on the low level input without affecting the frequency setting on the high level input
  • Frequency Contour 40 to 120Hz - Sets the upper roll off of the subwoofer to match the lower roll of of the main speakers
  • Phase - Contiguously variable phase

Not all if any plate amplifiers have this level of connectivity and control. The Extreme 1000 can be connected to both an AVR and Hi-Fi amp simultaneously or it can be used to take advantage of "Pure Direct" modes

Output Power
1000W RMS Into 4 Ohms
Frequency Response
15Hz to 120Hz
100dB A Weighted
0.05% Typ
Low Level Sens
High Level Sens
H330.2 x W223.5 x D70mm
Mains Voltage **
110/230V - 50/60Hz

The Extreme 1000 uses the latest Class D amplifier coupled to a switch mode power supply that can deliver 1000W RMS into a 4 ohm load and 2000W peak to cover the short periods of time to cover the reality of music.

The built in over current protection has two modes. During transients into the current limit threshold it allows constant output current but if this condition persists it goes into burst mode. This guarantees that the amplifier does not create audio holes during heavy listening but still effectively protects it during short circuiting. The thermal protection is by a sensor connected to the very tab of one of the output devices giving a very fast detection and shut down should overload occur.

The picture to the left shows the results of driving the Extreme 1000 into a 4 ohm dummy load just into clipping. Input volts to the amplifier was 240V AC and as can be seen in the true RMS volt meter we get 66.2 V RMS a whopping 1095W RMS


(c) 2018 BK Electronics - Unit 1 Comet Way, Southend-On-Sea, Essex SS2 6TR - Tel ; 01702 527572 email

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