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ELECTRO HARMONIX White Finger Analog Optical Compressor

Electric Guitar Compressor Effects Pedal. Sale


Reidys code: 26096     Warranty: 1 Year***



Let There Be White! Just like its cousin the Black Finger, the White Finger yields transparent, long sustain that preserves attack. Two optocouplers (LED and lamp) offer distinctly different readings and uniquely varied compressions. The White Finger features multiple FETs instead of vacuum tubes, making it the affordable alternative.

Quick Specs
True Bypass
LED optocoupler for a faster attack compression
Lamp optocoupler for softer blooming compressor
Quiet long sustains with transparent tones
Pre-gain control lets you control how hard your instrument hits the compressor
Sensitivity knob for control of how the compression will be hit
Compression amount allows you to dial in the perfect ratio for your music
Same compression theory as our professional NY-2A but uses FETs instead of tubes
40DC-100 power supply included
Dimensions in inches: 4.75 (w) x 5.75 (l) x 2.5 (h)
Dimensions in mm: 146 (w) x 121 (l) x 64 (h)

The White Finger is a warm sounding compressor pedal useful for both guitar and bass, as well as for home recording. This pedal features optical compression and an FET signal path. Reading these instructions carefully will ensure that you will get the most out of your White Finger.


Optical compressors work by treating an incoming signal with an optically controlled attenuator (a type of volume control) comprised of a fixed resistor and a shunt opto-coupled photocell. Because this attenuator is passive, as opposed to the more common active AGC (Automatic Gain Control) compressor circuits, it doesn’t add an electronic signature to the signal, thus preserving the tone and character of the original sound.

The White Finger is a fixed threshold compressor, meaning the threshold remains constant while you have the ability to change the amount of signal that goes to the compressor circuitry. The signal level sent to the compressor is controlled by both the Pre-Gain and Compress knobs. Some gain is needed to adjust the output level so that it matches the original level, and this is accomplished with an FET fixed gain pre-amp circuit. In general, compressors are used to sustain melody lines, minimize changes in signal level, or add a forward percussive effect to instruments or drums.


COMPRESS Knob - Varies the amount of compression from minimum (counter-clockwise) to maximum (clockwise).

SENSITIVITY Knob - Changes the characteristic of the compression. As the knob is turned clockwise, the compression effect becomes more dramatic and percussive.

LAMP/LED Switch - Selects the light source to drive the optical attenuator. The LED is very fast and flat in frequency content. Choose this setting for straight-ahead compression effects and sustain. Choose LAMP for a slow attack and a reduced compression on the treble content. This is great for funk chord playing, voice and keyboards.

SQSH/NORM Switch - Selects between normal attack and a “squashed” long attack time for the attenuator. This directly affects only the LAMP setting but you will see a reduction in compression if you leave SQSH on while in LED mode.

PRE-GAIN Knob - Adjusts the amount of signal fed to the attenuator. With this knob turned toward the minimum (counter-clockwise) position, less of the signal will pass the compression threshold. This is one way to dial in less effect. More signal in will mean that more of the signal will pass the compression threshold. The PRE-GAIN knob will maximize the compression effect when the COMPRESS Knob is turned up, or clip/overdrive the circuit if the COMPRESS Knob is turned down.

POST-GAIN Knob - Adjusts the Output level of the signal.

COMPRESSION LEVEL LED - Gives a visual indication of the gain reduction caused by the compressor. The brighter the LED is, the greater the compression.

STATUS LED - Lights up when the White Finger effect is engaged. If the STATUS led is off, the unit is in true bypass mode. The footswitch engages/disengages the effect.

INPUT Jack - This 1/4” jack is the audio input to the White Finger.

DIRECT OUTPUT Jack - This 1/4” jack is connected directly to the Input Jack so that the Input signal is always available.

OUTPUT Jack - This 1/4” jack is the audio output from the White Finger. When the White Finger is in Bypass mode, the OUTPUT jack is connected directly to the INPUT jack.

User Reviews

Finance Options

36 Month Finance

Pay over 36 months , with a 10% deposit and then £2.76 per month for 36 months at 15.9% APR*.

The total value to be financed on this order is £85.00. You will pay £ up front as a deposit, which leaves £ to be financed.

Your basic monthly instalment is: £2.76, so the total amount payable under the finance part of this arrangement is: £

The total amount you will pay including the deposit is: £. The cost of the finance is: £. The Fixed Annual Interest Rate is 8.17%.

Subject to status. The minimum amount to qualify for finance is £280. Interested in other finance options? Get in touch for a bespoke finance arrangement.

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* Interest Free finance based on 10% deposit and 12 monthly payments - APR 0%. 36 month Finance based on 10% deposit and 36 monthly payments - APR 15.9%. Written quotations are available on request. Credit subject to status. Total value of order must be £280.00 or more to qualify for finance. Ts & Cs apply. More finance information »

** Next working day delivery - If you order before 2pm, Monday to Friday, we can despatch in stock items for delivery next working day - UK only. Heavier items, Acoustic pianos & items with home installation may take longer. Delivery estimates for out of stock items assumes they are in stock at supplier.
'Free delivery' and other 'UK delivery' information applies to mainland UK addresses. Some highlands addresses may not be covered. Free Home Installation offers apply to residential mainland England and Wales addresses. Home Installation is to ground floor only unless arranged in advance. Heavy item deliveries to non-ground floor locations without a lift may cost extra.

*** Extended manufacturer warranties over 1 year may require product to be registered at time of purchase to be valid, Check product documentation or with manufacturer for details.

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