Welcome to Granger Amplification. We manufacture high performance vacuum tube amplifiers.



Granger 2203 SuperPlexi valve amplifier

The Granger 2203 SuperPlexi valve amplifier is a hand-wired reproduction of the 80's era 100 watt master volume amps that were heard on countless hard rock and metal recordings. Plenty of gain on tap, but chords and notes remain full and focused, and cut through any mix. The controls are classic. There are no footswitches, internal relays, or other signal-degrading components. It is based on tried and true circuitry and rock-solid construction methods. There are two inputs, one high and one low gain (sensitivity). The preamp consists of 3 ECC83S valves and power is rectified by UF4007 diodes to produce a punchy, tight powerful low end. The power section runs on four EL34 which produce over 120 watts when fully overdriven into saturation. For the service-minded player, an external bias adjustment with low voltage test points allows the user to bias the amp when replacing valves without removing the chassis.

Granger 2203 SuperPlexi valve amplifier

Granger 2203 SuperPlexi sound clips

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Granger 2203 SuperPlexi features:

* Handcrafted in USA
* Custom US Made power and output transformers
* Turret board wiring
* Output (RMS): 100 watts
* Preamp valves: 3 x ECC83S
* Power amp valves: 4 x EL34
* Diode rectification
* Presence control
* Bass, Middle, Treble controls
* Preamp Gain
* Master Volume (pre-phase inverter)
* "Plexi" type control knobs
* 4/8/16 ohm impedance selector switch
* Carling switches
* Cliff input jacks
* Cliff output jacks
* Chassis external Bias test and adjust
* Dimensions: 30"W x 10-1/4"H x 8"D
* Weight: 48 lbs.

* Vari-Wattage™ ($200)
* Ultimate FX Loop ($100)
* Custom Head Cover ($50)
* Tolex/Piping Change ($25)

Click to see Tolex and Grill cloth colors

Additional (No charge) options (please specify in special instructions field when ordering):

* JJ EL34, E34L, or KT77 output valves

Please specify options during ordering, or contact us within 10 days after placing order.

Please see our current turnaround times before ordering! Each amp is custom built to order.


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Prices subject to change without notice. Orders already in progress are not subject to price changes. Granger Amplification reserves the right to make any product design changes without notice or obligation to incorporate these changes in products previously purchased.

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All content copyright 2007-2014 by Blue Nite Productions. grangeramp.com is the website of Granger Amplification, a company that builds quality, custom amplifiers, one at a time, at very reasonable prices. Our focus is on producing all-tube, hand wired amplifiers based on proven designs such as vintage Marshall and Fender products, and other boutique amps, while charging a fair price. We also do kit building, modification, and repair work. We specialize in Plexi recreations, custom, boutique amp builds, and custom mods. All trademarks are owned by their respective companies and are only used herein for historical references. - guitar amplifier, amplifier, guitar, amp, amps, builder, for sale, fs, repair, mods, hand, wired, tone, custom amp, custom amps, amp mods, modifications, amplifier, handwired, point to point, tube, vacuum tube, valve amp, kit build, amp kits, made in usa, d18, e35, m45, m50, g50, cg50, lead overdrive 100, dragonfly, marshall, fender, jtm50, jmp, jcm, superlead, plexi, 15 watt, 18 watt, 35 watt, 36 watt, 45 watt, 50 watt, 100 watt, single ended, push pull, 5E3, bassman, matchless, trainwreck, express, epiphone valve junior, blackheart, tweed, deluxe, curt granger, birmingham alabama