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



Granger Highway 11 valve amplifier

Clean is MEAN! The Granger Highway 11 valve amplifier is all-tube, single channel, "bare-bones," EF86-driven preamp, and with a pair of KT66 in the power amp, chimes in at a very clean 30 watts. What sets this amp apart from the pack of similar boutique varieties is the combination of an ultra-linear output transformer and a tube-driven tone stack. The tone controls are driven by a 12AX7 tube stage, which facilitates active boost, as well as cut, from the Bass, Middle, and Treble control. A single Volume control dials in the amount of gain and overall volume. Shimmering cleans extend past the usual breakup point, and the amp only starts to get crunchy at higher tone and gain settings. This combination is also a total knockout when it comes to running pedals on the front end. Any pedal placed in front of the preamp will have its true character and uniqueness added to the already harmonically rich, and dynamically focused tone. In other words, this amp LOVES pedals! Custom options are limited to tolex & piping changes, and a custom cover with the Granger logo. Effects loop?... NOT needed.

Listen to the YouTube sound demo to hear multiple pedals (annotated in the clip) with the Highway 11.

Granger Highway 11 valve amplifier

Granger Highway 11 sound clips

Granger Highway 11 features:

* Handcrafted in USA
* ClassicTone US-Made power and output transformers
* Turret board wiring
* Output (RMS): 30 watts
* Preamp valves: 1 EF86, 2 x ECC83S/12AX7
* Power amp valves: 2 x KT66
* 5AR4/GZ34 rectifier
* Active, tube-driven tone stack
* Treble, Middle, Bass, and Volume controls
* 4/8/16 ohm impedance selector switch
* Carling switches
* Neutrik input jacks
* Neutrik output jacks
* Davies or Pointer knobs
* Dimensions: 18"W x 9"H x 8.5"D
* Weight: 32 lbs.


* Custom Head Cover ($50)
* Tolex/Piping Change ($25)

Click to see Tolex and Grill cloth colors

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 2007-2015 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, highway 11, lead overdrive 100, dragonfly, marshall, fender, dr. z, 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