Pricing and availability
We compare 600+ stores and found this item at 7 stores. Prices updated .
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Average Price: $2,501
High-end/Boutique
$300
$801+
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Budget
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High-end
Price History
Based on price data from 5 merchants for "Friedman Dirty Shirley 40 40-watt Tube Head". Prices shown reflect NEW condition. Tracking began Apr 2, 2026.
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Description
Meet the Friedman Dirty Shirley 40 40-watt Tube Head - a vintage classic rock tone powerhouse designed for guitarists who crave that authentic British tube amp sound from the '60s and '70s. Inspired by the iconic JTM 45, this single-channel amplifier is more than meets the eye. Its 40-watt, 5881 powered heart delivers the signature high gain tone Friedman is celebrated for, while also giving you the flexibility to dial it back for a clean, vintage crunch.
The Dirty Shirley is more than just versatile - it's dynamic. With the ability to produce a wide range of musical styles from blues to rock and country, it adapts to your playing and musical needs in the moment. This is largely thanks to the three-position gain structure switch that modifies the overall gain of the amplifier, allowing you to switch between modern and vintage tones effortlessly.
When it comes to construction, the Dirty Shirley is as robust as they come. Its beautiful black Tolex and Baltic Birch build are designed to withstand the rigors of the road, ensuring it's a loyal companion for all your musical adventures. And let's not forget about its love for pedals. Boosts, OD's, phasers, flangers, tremolos, wahs - this amp is designed to take them all and make them shine.
Key Features:
- 40-watt, 1-channel all-tube amplifier with British voicing
- 3-position gain structure switch for toggling between modern and vintage tones
- Ultra-transparent effects loop for your favorite pedals
- Handwired in the U.S.A using only hand-selected components
- Dual 5881 power tubes
- Built to withstand the rigors of the road
- Suitable for many styles of music from blues to rock and country
- Comes with custom transformers and capacitors
- Dual speaker outputs for up to 2 speaker cabs
Product specs
| Type | Tube |
| Number of Channels | 1 |
| Total Power | 40W |
| Preamp Tubes | 3 x 12AX7 |
| Power Tubes | 2 x 5881 |
| EQ | 3-band |
| Inputs | 2 x 1/4" |
| Outputs | 2 x 1/4" |
| Effects Loop | Yes |
| Bias Type | Adjustable Fixed |
| Construction Material | Birch Plywood with Black Tolex |
| Power Source | Standard IEC AC cable |
| Height | 9.5" |
| Width | 24" |
| Depth | 8.5" |
| Weight | 31 lbs. |
FAQs
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What kind of tones can I expect from the Friedman Dirty Shirley 40-watt Tube Head?
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The Friedman Dirty Shirley 40-watt Tube Head delivers a vintage British-style crunch with a smooth, high-gain tone. It cleans up well when you roll back your guitar's volume, making it versatile for classic rock and blues styles.
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Is the Friedman Dirty Shirley 40 suitable for gigging with a band?
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Yes, with its 40-watt power, the Friedman Dirty Shirley 40 is loud enough for live performances, providing ample headroom and clarity to cut through a band mix.
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Does the Friedman Dirty Shirley 40 take pedals well?
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Absolutely, the Friedman Dirty Shirley 40 is known for its excellent pedal compatibility, especially with overdrive and distortion pedals, thanks to its transparent effects loop.
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What is the construction material of the Friedman Dirty Shirley 40?
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The Friedman Dirty Shirley 40 is constructed from birch plywood and covered with black tolex, ensuring durability and a classic aesthetic.
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Does the Friedman Dirty Shirley 40 have an effects loop?
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Yes, the Friedman Dirty Shirley 40 features an effects loop, allowing you to integrate your modulation and time-based effects seamlessly.
Videos
Michael Nielsen - Big Hairy Guitars
Friedman Small Box vs Dirty Shirley
Reviews
PROS
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Exceptional versatility, from country cleans to metal
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Maintains clarity and richness at any volume
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Pedal-friendly, enhancing both front-end and effects loop setups
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Single channel with dynamic range from clean to high gain
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Vintage tone with modern modifications for current play styles
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Harmonic richness and touch responsiveness
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Effective master volume, akin to built-in attenuator
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Fat clean, crunch, and light distortion tones
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High-quality build and components
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Unique blend of classic amp tones (e.g., Soldano SLO and Marshall JTM)
CONS
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Some users find it too gain-heavy for their taste
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Perceived as not as versatile or well-constructed as some competitors
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Price point may be high for certain budgets
Owner Insights
We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Friedman Dirty Shirley 40 40-watt Tube Head.
Features and functionality
Use cases and applications
Comparisons
Mods and upgrades
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A recommendation for using a Creation Audio MK 4.23 clean boost in the loop to significantly enhance the tone of the Friedman Dirty Shirley.
Source
User experience
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Owners emphasize that Friedman's 20-watt models are surprisingly loud, suitable even for gigs without being mic'd up.
Source
5.0 out of 5
Based on 0 Reviews and 4 Ratings
Artist usage
Add artist
At 33:03 of this "Rig Rundown", Rebecca Dirks of *Premier Guitar and Mike Hickey talk about the Friedman 100 Watt Dirty Shirly prototype head.
"This is a Dave Friedman amp, Dave Friedman from Rack Systems. This is a Dirty Shirley head. This head is pushing a 15 cabinet. It sounds so good - 5881s as well. Such nice drive with a little warmth to it. It's very warm which is why the 15s is very good. What that does is it gives him that feeling underneath that he likes to hear," says Joe Perry's guitar tech.
In the YouTube video "Halestorm's Lzzy Hale Plays Her Favorite Riffs" by Loudwire, Lzzy Hale is seen using a Friedman amp/head combo, which is similar to the Dirty Shirley 40-watt Tube Head.
"I really like what Friedman Amplification is doing. I recorded my new album entirely with 2 of their heads. I used the Brown Eye/Hairy Brown Eye for all of the leads and The Dirty Shirley for all of the rhythms. I'm totally in love with those amplifiers!" -Nick Johnston
in this article Chris says he used two amps and a fuzz for Strange Lights. One of these is the Friedman Dirty Shirley.
Album Usage
The Friedman Dirty Shirley 40 40-watt Tube Head has been featured on the following albums:
Genre Usage
Based on how artists on Equipboard use this gear, it is most commonly found in the following genres.
Used With
Based on how musicians on Equipboard use Friedman Dirty Shirley 40 40-watt Tube Head, it is most commonly used with the following gear.
Similar
Add recommendation3 alternative and related items for Friedman Dirty Shirley 40 40-watt Tube Head, curated by the Equipboard community.
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An amp in a box pedal designed to capture the sound of the Dirty Shirley amplifier.
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A 20 watt version of the Dirty Shirley, that retains the hand wired construction and all tube circuit of its big sister.
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