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Multi-Function Delay
Boost Guitar Pedals uses Royal Mail for all domestic deliveries and UPS for international deliveries.
UPDATE – As of 13th December 2024, we are
regrettably no longer able to ship to customers located within the EU or Northern Ireland, due to new GPSR regulations which make it prohibitively expensive for small businesses to operate in the zone.
UPDATE 2 – As of 10th April 2025, we are still shipping to the USA. Please note that due to the volatile political situation relating to tariffs, we may have to cease offering shipping here at short notice.
We offer free 24-hour tracked UK delivery on all orders over £150! Order before 9pm for next-working-day dispatch.
We offer 30-day hassle-free returns so you can pick the item you want safe in the knowledge that if it's not for you, we'll take it back and refund your order.
International deliveries are subject to additional import duties and VAT at your local rate. These charges are payable to the courier at time of delivery. Calculate how much you will need to pay here.
Please note that some orders may take longer to be processed before shipping during the busiest periods of the year.
Customers hold the right to return a product for a full refund if I am notified within 30 days of delivery.
If a product is delivered in a defective or damaged condition, please contact me immediately with details of your order.
To be eligible for a return, the item must be in the same condition
that you received it. It must also be in the original packaging.
Please note, the cost of return delivery is to be paid by the customer. This will be reimbursed if the item is shown to be faulty.
To complete a return, I require a receipt or proof of purchase. Please do not send any items back to the manufacturer, and please do not send any items to me without contacting me first.
Once I have confirmed that I will process your return, please send the item to:
Boost Guitar Pedals (returns)
84 Wolf Lane
Windsor
Berkshire
SL4 4YZ
United Kingdom
My first course of action for faulty items is to replace them like-for-like. If this is not possible, a full refund will be considered as an alternative.
If returned within the 30-day period, your refund will be processed and a credit will be applied to your credit card or original method of payment.
The customer is responsible for paying return shipping costs. Shipping costs are non-refundable unless a product is proven to be damaged or faulty upon delivery.
It is recommended that items should be returned using a trackable shipping service in case the item goes missing en route.
The Walrus Audio ARP-87 is a feature-rich delay pedal with 4 modes: Digital, Analog, Lo-fi, and Slap.
The Digital mode provides pristine, crystal-clear repeats which are perfect for those classic 1980s and '90s delay sounds.
The Analog mode brings warmth and depth to both chords and lead lines.
The Lo-Fi mode features an adjustable frequency range on the repeats, ranging from warm to warped and murky, and AM-radio.
The Slap mode allows you to dial in a great slapback echo, perfect for country and early rock 'n' roll.
The ARP-87 includes other features including smart bypass switching and momentary knob ramp.
Level adjusts the level of the repeats. Turn it clockwise to increase the volume of the echoes.
Dampen controls the overall tone on the repeats. It is a low-pass filter, so turning this knob clockwise will open the filter and brighten the repeats. Counter-clockwise will close the filter and darken the repeats.
Repeats adjusts the number of repeats that are heard. Go from one repeat at full counter-clockwise, to near-infinite at full clockwise.
Ratio sets the tempo multiplier for the tap-tempo modes (Digital, Analog, Lo-Fi), and it adjusts the delay time for the Slap mode.
The X control changes functions depending on which mode you are in: in Digital, Analog, and Slap modes, the knob will control modulation depth.
In Lo-fi mode, the knob will control Filter width.
Note that when changing delay types this loads a whole new algorithm and the tempo must be tapped in again. Max delay time is 1,000ms.
The ARP-87 can be run in trails or no trails mode. In Trails mode, turning the pedal off lets the delay trails die off naturally. In No Trails mode, the delay trails are cut off as soon as you turn the pedal off.
To toggle between either Trails mode, hold down the bypass switch for 1 second while applying power to the pedal. Unplug power and repeat to toggle to the other mode.
When the pedal is powered but turned off, press and hold the Bypass footswitch to temporarily activate the Momentary effect for a moment of delay texture. Releasing the switch turns the effect off.
When the pedal is on, press and hold the Bypass footswitch to momentarily ramp the X parameter to maximum. Releasing the footswitch sets the X parameter back to the knob location.
Press and hold the Tap footswitch to temporarily ramp the feedback to maximum. Release to set the feedback back to the knob location.
