British invasion! Taking its roots from legendary British guitar amps, the English Muff'n recreates their majesty and classic tone with spot-on accuracy. Rather than approximating these amps like "emulator" products, the English Muff'n employs vacuum tubes to produce the richness and natural saturation of Brit-valve sounds. A bloody masterpiece! This uniquely powerful tool is designed to enhance your music and expand the range of your existing equipment. The English MUFF’n is used to create the sound of 1960s British guitar amp’s pre-amp and tone circuits. Please take a few minutes to familiarize yourself with the English MUFF’n controls and how they work.
The English MUFF’n consists of both a gain stage and a tone control section. The tone control section contains high (treble), midrange, and low (bass) tone controls, which form a traditional “tone stack,” as used in vintage pre-amp sections of ‘60s British guitar amps. A “tone-stack” refers to how an amplifier is voiced for EQ and Gain in the pre-amp section. All three EQ controls are interactive, letting the player dial in anything from hard-driving modern distortion to the sweet sustain of classic vintage models.
As in the classic British amplifiers, the sweetness and power of the tone is a combination of working the preamplifier gain against the Post gain. The more you turn up the preamplifier, the more saturation of the tubes there is. This results in anything from a sweet and subtle blues overdrive all the way to the classic British stack cranked to the max.
It is easy to set up the Muff’n to give you that sweet Brit sound with an emphasis of any part of the EQ curve. For example, dipping the midrange produces the classic scooped sound. As always, experiment to achieve your own unique sounds. For the first time, you really do have the classic British sound. It is totally dependent on the vacuum tubes. No modeling, no DSP, just the classic sound, which was totally created by vacuum tubes just like the originals.
GAIN - This controls the intensity of the drive and will provide a stunning range of overdrive selections. Lower settings will give a simple volume boost, while advanced settings will yield screaming solo sounds.
HIGH - Determines the treble response, which tailors the attack and enhances the harmonic content of the pre-amp.
MID - Provides the key to an impressive range of distortion tones. When backed off, the sound is smooth and fat. Increasing the contour changes the character of the mid response and enhances the high and low frequencies.
LOW - Controls the bass frequencies, giving a range from thuddy and heavy to tight and punchy.
VOLUME - Determines the overall output level and amount of boost. Use this to set the level relative to the bypassed sound.
In addition to the input and output jacks at the front of the unit, there is also a STATUS LED. When this LED is lit the English MUFF’n is in the signal path. If the STATUS LED is off then it is in “true bypass” mode, and is completely out of the signal path.
You’ll come to rely on this amp-in-a-box…a bloody masterpiece!
WARNING Your unit comes equipped with a 12 Volt/1 Amp AC external power adapter. Use only the power adapter supplied, and make sure it is appropriate to your location (USA, Europe, Japan, Australia). Use of the wrong adapter can cause damage to the unit or to you, and will void the warranty.
True bypass using a mechanical relay
Dual vacuum tube preamp dedicated to a true tube overdrive
Supplied with two Electro-Harmonix 12AY7 tubes
Substitute Electro-Harmonix 12AX7 for more gain/distortion
Substitute Electro-Harmonix 12AU7 for less gain/distortion
Experiment with different tube combinations for entirely new tube drive sounds
Does wonders for any amp
Award winning pedal that really gives you the English tube amp sound
12AC-1000 power supply included
"Its clean tones are nothing but inspiring. Delivers tea-riffic Brit-tones that turn your amp into a British classic." -- Art Thompson, Guitar Player
We want you to feel confident with your Prymaxe purchase, which is why when you purchase a new product from us, you are automatically enrolled into our FREE Two Year Warranty.*
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* We reserve the right to end this promotion at any time.
All in stock orders placed before 1pm EST will ship same day and all orders placed after the cutoff will ship the next business day*. If you need an order immediately, please let us know and we’ll try our best to accommodate your request.
Most orders shipping within the US will ship via USPS or FedEx and are fully insured, we also offer express options if you need an item within 24 hours. All tracking numbers will be sent via email after the item is shipped. If you did not receive your tracking number please feel free to call or email us.
All US Orders $49+ Ship for FREE
We love and truly appreciate all of our International customers. All of our international shipments are fully insured and are guaranteed to be delivered or your money back. We offer a variety of shipping options for you to choose from and if for any reason there is an issue with your order we will make it right, that is our promise you.
Pre-Orders typically ship with 2 weeks. In the event a product is backordered we will contact you with an exact shipping timeframe.
Smaller items will ship USPS First Class.
USA shipping only for Barber Electronics, Boss, Darkglass, Dunlop, DryBell, EarthQuaker Devices, Eventide, EVH, Fender, Gretsch, Korg, Marshall, Music Man, MXR, PreSonus, Roland, Schecter, Shure, Source Audio, Way Huge, Tech 21, Vertex, Voodoo Lab, Vox, Wampler.
What if my package gets stolen?
Please note: We are a small, family owned business. While we want to make sure you are satisfied with your purchase, we would like to try to limit the amount of returns as much as possible. This helps both us and the customer save time and money. If you are unsure about a product, please contact us before you complete the purchase, and we'll do our best to find the item that will best suit your needs. Prymaxe reserves the right to define abuse of the return policy on a case by case basis and consequently refuse subsequent return requests by said abuser and place them "All Sales Final".
Last Updated: March 27, 2018
If you are not 100% satisfied with your purchase, you can return it within 45 days of the original purchase date for a store credit refund, or within 14 days of the original purchase date for a refund to the original purchase method (PayPal, credit card, etc). If an item is not received by us within the 45-day window, the package will be refused. All new items returned must be in BRAND NEW condition with zero signs of wear or use and must be returned in the original packaging with ALL materials (free/bundled items -- must be unused/unopened, warranty cards, plastic, pouches, manuals etc.). We reserve the right to charge an up to 15% restocking fee on any opened guitars, amps, or keys being returned.
Our 45-Day Satisfaction Guarantee covers brand new products only -- it does not cover used and clearance products (see below). It also does not cover items in the “What is NOT Returnable” list below. Please note: All actual shipping fees paid by Prymaxe will be deducted from your refund. This includes orders that qualified for free or subsidized shipping. Return shipping must be paid by the buyer. If you received a defective or incorrect item, please see our FAQ section below.
All Used and Vintage items come with a 48 hour approval period. Please contact us directly at email@example.com within 48 hours of receiving your product for us to set up a manual return for you. Be sure to include your order number and reason for return in the email. All Used/Vintage items must be returned in the same condition they were sent to you in, as well as include all materials that came with it.
All returns should be insured by the buyer and sent via UPS, Fedex, or USPS with tracking. Please do not write on or attach tape or labels to the product box (these will be refused) -- use a packing box to return the product. Attach a shipping label with the RMA number onto the shipping box. Packages without a valid RMA number on the outside of the box will be refused.
To request an RMA number, please call us at 1-(855)-PRYMAXE (779-6293) (International Customers, please use 1-(908)-272-2990) during our normal business hours (Monday - Friday, 10 AM - 6 PM Eastern, excluding federal holidays).
When will I get my refund?
Once your return is received by us, your refund will typically be processed within 10-15 business days. It typically takes a few business days for all credit card refunds to be processed and reflected on your statement. This means it will take a few extra days for your refund to show in your account after your return is processed. Store credit refunds will be given in the form of a e-gift card which will be available for immediate use after it is emailed to you. Please note: All actual shipping fees paid by Prymaxe will be deducted from your refund. This includes orders that qualified for free or subsidized shipping. Return shipping must be paid by the buyer. If you received a defective or incorrect item, please see the next question.
What if I receive a defective or incorrect item?
If a product is defective upon arrival, or the wrong item was received, all the shipping fees will be covered by us and we will give you a store-credit refund on the original order. For defective items, Prymaxe reserves the right to refuse the return if we determine the reason for the unit failing was not covered under the warranty (i.e., if the item was damaged due to user fault or error). If you feel your item was damaged in shipping, please take plenty of pictures of the damaged box and item and immediately contact us so we can open a claim with the shipping company.
Please be very diligent with testing your defective item. Be sure to try other guitars, power supplies, cables, and amps. We also request that you take a video of the item not working. If we receive your item, test it, and find it to be working, we will give you a refund minus the cost of shipping both ways.
When must I ship my return?
Your return must be received by us within 45 days of the original purchase date for store credit, or postmarked by 14 days for a refund to the original purchase method (PayPal, credit card, etc). This means you must ship your return with enough time for us to receive the package within the deadline. If it does not arrive within 45 days, we will refuse the package. If you feel you sent the package within a reasonable time frame, but it arrived late due to the shipping company’s error, please immediately contact us to make an appeal before we refuse the package.
What if I pre-ordered an item?
If a pre-ordered item arrives outside of the 45 day window from when you ordered it, you will have 7 days from the arrival date to send it back for store credit.
Why was my package refused?
There are a number of reasons your package could be refused by us, including: