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Therevox ET-4.3

   (1 review)

The ET-4.3 takes the all-analog design and adds a modern MIDI over USB output that allows it to control software synthesesizers and other external hardware for unlimited sonic possibilities. All of the extra features of the ET-4.2 are also included as well as a second expression pedal / CV input that can be assigned to different parameters, and two Hold knobs for the intensity keys.

The MIDI over USB feature can operate in four different modes and allows for high speed and low latency. The position of the ring is sent as a 4 octave or 2 octave pitch bend and CC values are sent for the position of the intensity keys, expression pedal, osc 2 offset control, and octave controls. The intensity keys trigger notes on one or two separate channels depending on the mode setting, this allows each to trigger different instances of the same softsynth or different programs entirely. The sounds created from external hardware or software can then be sent back into the ET-4.3's external audio input to take advantage of the internal lowpass filter and spring reverb before being sent out for amplification or recording.

The second expression pedal input allows for bending the pitch of an oscillator, modifying the pulse width or controlling the output volume. This input also doubles as an external CV input and is assignable to control osc 1+2 pitch, osc 2 pitch, osc 2 pulse width or osc 1+2 volume. The ET-4.3 also has two Hold knobs above the intensity keys that allow the volume of each oscillator to be set without having to press the intensity keys.

Technical Specifications
Type: Analog
Synthesis: Subtractive
Oscillators: 2
Waveforms: Pulse Variable, Sine, Triangle
Osc Modulation: After Touch, Keyboard, Knob, LFO, Ribbon
Filters: 1
Types: 24dB Slope (4-pole), Low Pass, Resonance
Filter Modulation: Keyboard, Ribbon
LFO: 1
LFO Parameters: Sine, Square, Triangle
LFO Notes::
+ OSC2 can be used as LFO
Polyphony & Tuning
Polyphony: 1
Timbrality: 1
Tuning: Atonal, Micro, Standard
Modes: Mono
+ Spring Reverb
Case: Keyboard
Keyboard: 37 keys, Mini-Keys, Wood
Controls: Aftertouch, Knobs, Mod - Ribbon, Pedal - Sustain, Switches, Pedal - Volume
Display Type: LED
Dimensions (WxDxH): 30 x 11 x 4 Inches
Audio Output Connections: 1/4" Phone Jack, Stereo Main, Stereo Headphone
Inputs: 1/4" audio input
CV Ports: CV OUT, 1V Octave
Power: 110-120V or 220-240V, 16VAC
Year Released: 2013

Product Links
Company Product Sites:
[+] therevox.com
MSRP List Price: $2350 - convert
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Scotty Hughes

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· Edited by Scotty Hughes


I have played a Therevox ET-4.  They are an amazing synth, very well made (hand made) and capable of a wide variety of  sounds, and the control method is like no other.  Well worth the money.

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