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Electro Harmonix White Finger Analog Optical Compressor

  • £85.00
  • (Delivery From £6.95)
  • RRP £127.00
Out of Stock | In Stock

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.


Coronavirus Update

Our chosen couriers are currently operating as normal and all orders should be delivered on time. DPD are also now operating a "contact-free" service as a standard process and customers will not be asked to sign handheld units.

Mainland UK Delivery Services

  • Next Working Day - Free for orders over £99, £8.95 otherwise (DPD, Next Working Day)
  • Standard - Free for orders over £99, £4.95 otherwise (DPD, 1-3 Working Days)

Order before 2pm, Monday to Friday, for same-day dispatch of in-stock orders. Very heavy items such as pianos may take longer to deliver. In-stock orders placed over the weekend will be dispatched on Monday. Estimated delivery times for out of stock items are to be used as a guide only, these items may take longer than estimated to arrive. While we try our best to ensure rapid delivery of your order, delays may occur which are outside our control, and delivery of large or bulky items, or to remote or non-mainland addresses may take longer than estimated.

Courier Tracking

Most UK deliveries are shipped by our trusted courier, DPD. You'll receive an email with a delivery day, tracking and a one hour estimated delivery window on the morning of delivery. While we can't specify the time of the delivery, if it's not convenient, you can arrange directly with DPD for an alternative delivery date or request the parcel be left with a neighbour.

For heavier items, we usually ship UK deliveries by TNT. You will receive an email with tracking details when we ship your order. 

Delivery Charges

Delivery to mainland UK addresses is free on all orders over £99. Delivery charges are based on the size and weight of your order and, in some cases, your location. A standard next working day carriage charge for UK mainland addresses is shown on the shopping basket page, but you can change delivery service later in the checkout.

Delivery Couriers

We use a few different delivery couriers, depending on the items being sent, your location, and the delivery service you've chosen:

  • UK inc. Northern Ireland: Most items will be shipped by DPD. Note: all items in your order must be in stock for all of your order to be dispatched on the same day.
  • UK inc. Northern Ireland: Most smaller items will be shipped by Royal Mail Recorded Delivery.
  • UK inc. Northern Ireland: Most very large or heavy items such as pianos are delivered by TNT, or by our in-house delivery service. Orders shipped by TNT are usually on a next working day service, whereas items using our in-house delivery service may take longer. Note: Delivery to non-ground-floor addresses without a suitable lift will cost extra.
  • Europe: Most orders will be shipped by DPD International. Delivery times and charges depend on your location - these charges will be displayed in the order basket.

Most orders will need to be signed for and we advise you make sure to check your parcel/s for any damage before signing. If no-one is available at your address, a card will be left so you can arrange a re-delivery directly with the courier. Redirection of an order after it's been dispatched may incur an extra charge from the courier.

Delivery Areas & European Shipping

Delivery charges displayed apply to most UK mainland addresses. Deliveries to Northern Ireland, UK non-mainland, and European addresses will cost more, and carriage charges will be shown at the checkout before you place your order. Free delivery offers may not apply to some remote/Scottish Highlands addresses.


Coronavirus Update

There are currently delays for all returns processing due to extra safety procedures. Thanks for your patience during this difficult time.

Replacement process for items damaged in transit or faulty items

It doesn't happen often, but occasionally an item can get damaged on the way to you. Don't worry! If your order is received either damaged or faulty, just let us know, preferably using the returns request form within 30 days of receiving the item, and we'll arrange for it its return and for a replacement or refund.

Returning an undamaged item

You can return most items bought online or by phone within 14 days for a refund (provided that it is unused and returned to us in New Condition – including packaging). You will need to return the item at your own expense. When we receive the goods back undamaged and with the correct packaging we will refund the cost of the goods.

Software or products that include software that needs to be registered are not eligible for this 14 day return period if opened and installed, and due to hygiene reasons we can't accept certain used in-ear headphones, microphones or harmonicas.

Faulty items under guarantee

The repair procedure for items which are under guarantee varies from manufacturer to manufacturer - please refer to the documentation which accompanied your purchase or complete the returns request form and we will advise you of the appropriate process.