Electro Harmonix Nano Dr Q Envelope Guitar Effects Pedal

Product ID: 61525

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  • High-quality envelope filter effects pedal
  • Great paired with your electric or bass guitar
  • Dynamic circuitry reacts to your picking style
  • Bass switch allows you to dip your tones into deeper waters
  • True bypass footswitch preserves the integrity of your tone
  • Heavy-duty die-cast construction is ready for touring
  • Compact design slips into any pedalboard setup - or your pocket
  • Powered by internal 9V battery or external 9V power supply
  • Includes 9V battery to get you playing straight away
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Delivery & Returns

Delivery to UK mainland addresses* is FREE on orders over £75 and up to 30kg. (As a guide, a standard electric guitar weighs approx. 3-5kg).

Delivery on orders below £75 are charged at £4.45!

Delivery to Northern Ireland, the Scottish Highlands & Islands, Isle of Man, Isle of Wight, Channel Islands and the Republic of Ireland. is weight dependant and will be indicated at the checkout

Delivery above 30kg to ANY location will vary according to weight and will be indicated at the checkout

LocationPriceStandard Delivery
UK mainland*FREE on orders over £75 £4.45 on orders under £751-3 working days
Northern Ireland, Scottish Highlands & Islands Isle of Man Isle of Wight Channel Islands Republic of Ireland£12.95 – any order value up to 30kg Over 30kg - please call1-3 working days
OverseasPlease call for detailsPlease call

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The Electro Harmonix Nano Doctor Q Envelope Filter Guitar Effects Pedal delivers classic '70s funk tones in a pedalboard friendly, pocket-sized case. The dynamic picking response offers anything from subtle to saturated wah-like tones, bringing the percussive brilliance of your performance to the fore.

Simple control, powerful results

Though it may be small and the control layout simple, the tonal versatility of this pedal is quite remarkable. At your disposal is a Range knob, a Bass switch, and a bypass footswitch. The Range knob determines the frequency range in which the filter operates, allowing you to go from low to high with ease. The Q responds to your picking dynamics and the pedal's output depends on a lot of variables that take into acccount: your guitar volume control level; the Doctor Q’s Range control setting, and how hard you strike the strings. It is mightily impressive that this little dynamo juggles all of these and then produces the sweet wah-like effects beautifully. The total filter range is determind by the interaction of your guitar's volume and the Range control setting. The harder the attack and the higher the setting, the greater the effect of the sweep range. Low volume and low range = little to no sweep.

The Bass Switch allows more low frequencies to pass through, thus giving you a low end boost when the Doctor Q is set to create little or no filter sweep. The true bypass footswitch ensures that your tone will remain unblemished whether active or inactive. When the pedal is active, the corresponding LED lights up to give you a visual indication, which is always welcome on a darkly lit stage.


Connectivity remains nice and simple - instrument input and a single output. The compact form factor of the pedal allows it to slip discreetly into the most complex of pedalboard setups, ensuring that no matter what, you can find a place for the Doctor Q in your rig. The pedal can run on an internal 9V battery, but is also equipped with a 9V power supply input, so wherever your music takes you, this pocket-friendly pedal is always good to go.

As we've come to expect from the team at Electro Harmonix, the Nano Doctor Q Envelope Filter Guitar Effects Pedal is built like a tank and ready to accompany you in the studio or on a lengthy tour.

ManufacturerElectro Harmonix
ModelNano Doctor Q Envelope Filter Guitar Effects Pedal
Dimensions (H x W x D) 54 x 115 x 70 mm
ControlsRange, Bass, Bypass Footswitch
Connectivity Input: Input
Output: Amp
9V DC Input
Included Accessories9-Volt Battery

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