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Friedman Dirty Shirley 40

Get fat and driving classic rock tones with the Friedman Dirty Shirley all-tube guitar amplifier head. Based on the sought-after JTM 45 amp, the Dirty Shirley gives you a wide range of tones from smooth and clean to Friedman’s famous high-gain tones. The response and sensitivity of this amp is amazing; roll back your guitar’s volume control for clean tones and turn it up for crunch and sustain. Powered by a pair of 5881 power tubes, Friedman Amplification’s Dirty Shirley tube amp head is a must have when you need that classic rock sound.

Make and model Friedman - Dirty Shirley
Power (Watt) 40 W
Channels 1
Power lamps 2 x 5881
Preamp lamps 3 x 12AX7
Rectifier Solid
Effect loop Yes
Effects No
Reverb No
Impedance 4,8,16
Size 26.6 x 60.9 x 25.4
Weight 13.8


Dave Friedman’s Dirty Shirley 40 Watt Head was designed for guitarists that want a Vintage Classic Rock tone inspired by British tube amps from the 60’s and 70’s.

It is based on a modified JTM 45 but still delivers the signature high gain tone for which Friedman is best known. The Dirty Shirley is a 40-watt, 5881 powered, single channel amp that will give you that vintage crunch and also cleans up nicely by merely backing off the guitar’s volume knob. Extremely versatile, it is capable of producing many styles of music from blues to rock and country by just adjusting the gain and master controls.

The Dirty Shirley features beautiful black Tolex, tongue and groove Baltic Birch construction and is built to withstand the rigors of the road.

The Dirty Shirley was designed to take pedals and loves boosts, OD’s, phasers, flangers, tremolos and wahs, while the brand new ultra-transparent series effects loop handles your time-based effects pedals and rack units.

The Dirty Shirley from Friedman Amplification, a real screamer that fits in your backseat!


    • 40-Watt all tube head
    • One channel
    • High and low sensitivity inputs
    • 2 x 5881 power tubes
    • 3 x 12AX7 preamp tubes
    • Gain, Master Volume, Bass, Middle, Treble and Presence
    • Ultra transparent series FX loop
    • 4, 8 and 16 ohm Impedance selector switch
    • Custom USA made transformers
    • Limited Lifetime Warranty
    • Dimensions: 10.5″ (D) x 24″ (W) x 10″ (H)
    • Weight: 30.5 lbs.
    • Hand Wired in the USA

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