Free Shipping on Most Orders No Sales Tax Except in MA Lowest Price Guarantee

Hours - Mon-Thu, 12pm-7pm / Fri, 12pm-6pm / Sat, 12pm-5pm

Call Us - (781) 335.0700

3rd Power Dirty Sink 6VEL 35 Watt Amplifier Head


We're currently out of stock on this item but if you'd like to inquire about incoming stock, a special order or a custom build, use the form below to get in touch with one of our specialists, and we'll get you taken care of!
– Matt's Music Staff


From 3rd Power:


The DIRTY SINK 6VEL is our new British-Crunch voiced amplifier based on the dirty channel of our flagship, Kitchen Sink 6VEL amplifier and features point-to-point turret board construction.  Loaded with M6-Grade Steel transformers and an overbuilt power supply delivering 35+ watts of power available in a 32 lb. 112 grab-n-go combo or 22 lb. compact amp head.

Features include a selectable Plexi/Cascade voiced British preamp, Dual Mode 3-band cathode-follower EQ (JTM/JMP), 4-way Preamp Bias Selector, Foot-switchable preamp gain boost, Foot-switchable tube buffered effects loop, Foot-switchable lead boost, our patented Hybrid-Master, external bias test terminals with back panel adjustment control, Switchable internal cooling fan, AND the ability to run 6L6, EL34, 5881 and 6V6 and more – hand-wired in the USA and covered by a LIFETIME WARRANTY.


British Clean to Massive & Mean


The DIRTY SINK 6VEL features a tone stack voicing switch that delivers the sweeter JTM tone control voicing and balanced gain response in one position, and the more in your face JMP voicing in the other. The Plexi/Cascade switch lets you select the amount of signal gain on tap to and assigns it to the Gain control knob. Plexi Mode is where you’ll find Crisp British clean to crunch. Cascade Mode is where you’ll find scorching high gain tones. The Gain Boost switch engages even more gain sending the tone stack driver stage into clipping without compromising the overall headroom of the tone. See below for a description of each of the three individual amp voices.


Set to Plexi Mode, you’ll find classic British clean to crunch tones. Set to Cascade Mode, you’ll find tones ranging from soaring solos to modern saturation.


Back in the day, players yearned for even more gain from their British lead style amplifiers and dreamed that this feature could be placed under foot switch control. We’ve added that here and we think its going to make a lot of people happy!

’65 JTM

The JTM45 debuted in ’65 bringing the punch and sustain of a certain American style bass amp but with a decidedly British angst. One circuit common to both was the tone stack featuring a 56k ohm slope resistor and a 250pf treble capacitor. This made for a sweeter tone with emphasis on the melody strings.

’68 JMP

The JMP amplifiers debuted around late ’67 bringing with it a distinctive mid-range frequency slice, increased sustain and of course, more power. One design tweak made a huge impact: a 33k ohm slope resistor and a 470pf treble capacitor. This increased overall gain, slice and punch… mission accomplished.


Unlock Tube Tones Like A Cheat-code


The Preamp Bias control is for players who thrive on exploring and crafting new guitar tones. Tube rolling in the preamp section will never be the same. It’s like a cheat code for tone junkies!

The Preamp Bias control features 4 bias presets that range from “cold” bias to “warm” bias. Cold biasing is a technique that reduces the amount of electrical current flowing through a tube gain stage. The lower bias, the smaller the the current – and the amplification performance of the gain stage occurs in a different portion of the tubes performance range. This can dramatically alter the tone and feel in unique and pleasing ways.

For example, it is possible to craft a tighter guitar signal with a more focussed dynamic response when running a gain stage with a lower bias current (cold bias). Conversely, it is possible to craft a fat, open guitar signal that is somewhat ambient in the way it loosens up when running a gain stage with a higher bias current (warm bias).

With the DIRTY SINK 6VEL’s Preamp Bias control, it’s possible to craft classic, open vintage British flavored tones as well as more modern, focussed higher gain tones and anything in between.


The CLD 1 setting locks the response into a tight grove. Percussive picking, fast legato and punchy power chords and crisp chord voicings – all are focussed and tight yet completely musically expressive. This setting feels more like an SSL mastering bus compressor in that the tone remains full but perfectly focussed and locked in.


The CLD 2 setting is similar to CLD 2, just a little less of it so as to lean toward more warmth.


The WRM 1 setting opens up the bias for more warmth while still leaning toward a tighter response.


The WRM 2 setting is pure vintage heat – in a really great way!


Made in Nashville, TN


The DIRTY SINK 6VEL is made by hand using FR4 board material that we source raw and drill in-house. Each turret is then hand placed and swaged to lock it into position. From there, we hand wire each trace to the back of the board prior to hand picking and installing the components and wire tails.


Foot-Switchable FX Loop, Lead Boost, Bias Test Points, Cooling Fan


The DIRTY SINK 6VEL gives you an all-tube effects loop optimized for pedals as well as rack-mountable gear. You can assign the FX Loop to the Switching Bus to bring it under remote foot switch control.


The DIRTY SINK 6VEL features external multi-meter test points and a fixed-bias adjustment control so you can optimize your power tubes for the best tone and longest tube life.


The DIRTY SINK 6VEL has a chassis mounted fan that pulls fresh air through the chassis and blows it out the bottom. This helps keep the system running cool especially during summer performances. When in the studio, you can turn the fan off to keep things as quiet as possible.


System Mute, +Gain, FX Loop, Lead Boost


The DIRTY SINK 6VEL brings all of these performance features of front panel and foot switch control: System Mute, Preamp Gain Boost, FX Loop On/Off, and Lead Boost. Several features can be assigned to a single button for complex scene control (Gain Boost, FX Loop and Lead Boost can be assigned to the Switching Bus Button). Front Panel Halo LED indicators show status of each feature for confidence during performance.


With the System Mute function, guitar tuning and swapping instruments eliminate on stage distractions. This is great way to keep the stage quiet in between songs as well. Tuners that mute are fine, but higher gain amplifiers will still “hiss” in the background. With System Mute, you’ll have a silent stage between songs. Overdubs in the studio will be tighter as well.


Additional preamp gain can be assigned to fall under foot switch command. This indicator tells you when you’ve added more gain.


Cue your own solos with the on-board lead boost function. This indicator lets you know when you’ve engaged the solo boost.


Nothing finishes out your lead tone like the perfect delay tap or multi-FX patch. Now you can have a complex tone without a complex setup. Just patch your favorite FX device in the all-tube buffered loop with the shortest cables possible and set it to y0ur favorite patch. When y0u turn on the loop, your lead tone will now be complete!

Features Overview

  • British Voiced Plexi & Cascaded Preamp Section (switchable)
  • Dual-mode 3-Band EQ (JTM/JMP – switchable)
  • Tube Buffered FX Loop (foot-switchable)
  • Preamp Gain Boost (foot-switchable)
  • Preamp Bias Selector (4 position switch from cold to warm)
  • HybridMaster plus foot-switchable lead boost
  • 6V6 (~20W) or 5881/EL34/6L6 (~35W and up) Operation
  • Back-panel Bias Test Points and Adjustment Pot
  • Over-sized /Overbuilt Power Transformer and Power Supply
  • 4 Button Pro Foot Switch & 7 Pin Cable (included)
  • Hand-wired and Hand Built in Nashville, TN
  • Limited Lifetime Warranty


  • Model Name: Dirty Sink 6VEL
  • Output Architecture: 2x Power Tubes (Class AB), Fixed Bias
  • Power Output: 35 Watt (EL34, 6L6), 20W (6V6)
  • Plate Voltage: 120V AC input yields ~440 V DC plate voltage
  • Controls: Plexi / Cascade Sw, Gain, +Gain Sw, Volume, Treble, Middle, JTM/JMP Sw, Bass, Presence, HybridMaster, HM Bypass
  • Output Impedance: Impedance Selector (16. 8, 4 Ohms) feeds two Output Jacks
  • Preamp Architecture: 3x JJ ECC83, 1x Soviet 12AX7LPS
  • Materials and Dimensions: 3/4″ Solid Pine Cabinetry, Birch Front baffle. 19-7/8″ (W) x 10″ (T) x 9″ (D)
  • Weight: 21lbs
  • Certification: CE Certified

Dirty Sink 6VEL ships as follows:

  • Dirty Sink 6VEL 112 Combo
  • Loaded with 2x JJE34L Power Tubes
  • Tolex color is Black Levant with vertical Bluesbreaker as standard.
  • Control Faceplates are Black as standard

Shipping & Returns

Free Shipping

Most orders over $99.00 ship for free inside the lower 48 states. Certain items that are large and heavy do not qualify for free shipping.

We Ship Worldwide!

For information on International Shipping, please call, email or use live chat for rates. Orders shipping outside the Lower 48 States to Hawaii, Alaska, Puerto Rico and international orders do not qualify for free shipping. Orders shipping to U.S. Military APO/FPO addresses, PO Boxes, and US territories (Guam, Virgin Islands, etc.) can only ship USPS. NOTE: Boxes over 70 lbs each cannot be shipped to these locations.

As a security precaution, orders over $200.00 will only ship to the address your credit card company has on file for you.

*Korg and Mesa/Boogie products are only available for shipment within the USA.


We want you to be completely happy with your purchase, so we offer a 48 hour approval period on most purchases (see exclusions below). The 48 hour approval period begins when your purchased item is delivered to your door. If after 48 hours you’re not happy with the item, just contact us via phone, email or live chat on our website to arrange for a return authorization (RA#) and return shipping instructions. Any package sent back without prior authorization will be refused.

Returns must be shipped back to us within two days of the RA being issued. Items must come back to us undamaged and in the same condition they were shipped out. All manuals, paperwork, cables, tremolo arms, wrenches, etc… must be included or full credit will not be issued. Any items not conforming to this policy will be subject (at our discretion) to a restocking fee of 20% of the purchase price.

Refunds will be issued minus all related shipping expenses, if free shipping was initially given, the cost we incurred to get the item to you will be deducted from your refund. A 10% restock fee will also be deducted from your refund. Restock fees will be waived for full value exchanges.

Here are exceptions to our return policy.

  • Custom orders of any kind are non returnable and non refundable. We often charge a deposit before we will place a custom or special order. All special order deposits are NON REFUNDABLE, no exceptions.
  • Microphones, Harmonicas, In-Ear Systems and any other items that come into contact with your mouth or ears.
  • Items labeled as BLOWOUT, are non-returnable. These are often being sold below cost and are considered “all sales final”.
  • Software (this may also include hardware that includes software), unless still in shrink wrap with barcode affixed.
  • Guitar strings, blank media, and other disposable merchandise.
  • Guitar or bass pickups that have been installed or used in any way.
  • Any item advertised as “USED” is non returnable.

*Payments for music lessons are non refundable, no exceptions.

View our detailed Return Policy here.

Early Order Cancellation

All deposits are non refundable. Lots of our products are special orders and in many cases your order has to be built for you at the factory. This is what makes a lot of our products special. Once your order is started, it's being put together just for you. For this reason we ask that you don't cancel your order after you place it with us. If for some reason you absolutely have to cancel your order with us, we will assess you a 25% cancellation charge. This amount is equal to 25% of your total order amount. Ask us before you place your order to see if what you're purchasing is considered a special order.

Damaged Merchandise

Do not accept your shipment if the package shows any signs of external damage. After the item is returned to us we will ship you a replacement. If you receive incorrect or defective merchandise, please call 781-335-0700 within 5 days for a return authorization number.