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



Granger M45 Classic valve amplifier

The Granger M45 "Classic" valve amplifier is conceptually designed for vintage tone and simplicity. If you want that vintage 60's "Plexi" tone and the touch sensitivity those amps are recognized for, this is it - and then some. The controls are simple. There are no footswitches, internal relays, or other signal-degrading components. It is based on tried and true circuitry and rock-solid construction methods. As with some of the vintage amps of the 60s and 70s, each channel has two inputs, one high and one low impedance, and a volume control. A (post phase inverter) master volume (based on Ken Fisher's design) can be added to achieve additional crunch at lower volumes, and at full clockwise position is effectively removed from the circuit. Each channel shares the standard Bass, Middle and Treble tone stack and Presence control. The inputs can be jumpered to utilize both channels with channel 1 being the bright and channel 2 being the normal voicing. The preamp consists of 3 ECC83S valves and power is rectified by a GZ34/5AR4 rectifier valve. The power section runs on two KT66 which produces more than 45 watts when fully overdriven into saturation. E34Ls can be substituted during ordering if you prefer more aggressive upper-mid bite. 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. The 2x12 combo features (1) Warehouse Guitar Speakers Veteran 30, and (1) WGS ET65 speaker. Other speaker options are available upon request. Custom options include Ultimate FX Loop, passive effects loop, tolex & piping change, and a custom cover with the Granger logo.

Granger M45 valve amplifier. Click on image for enlarged view.

Granger M45 sound clips

Granger M45 YouTube video

Granger M45 features:

* Handcrafted in USA
* ClassicTone US-made transformers
* Turret board wiring
* Output (RMS): 45 watts
* Preamp valves: 3 x ECC83S
* Power amp valves: 2 x KT66
* Rectifier valve: GZ34
* Presence control
* Bass, Middle, Treble controls
* Volume 1 (bright channel)
* Volume 2 (normal channel)
* 4/8/16 ohm impedance selector switch
* Carling switches
* Cliff input jacks
* Cliff output jacks
* Dimensions: 26"W x 10-1/4"H x 8"D
* Dimensions: 23"H x 32"W x 10.5"D (2x12 combo)
* Weight: 32 lbs.
* Weight: 75 lbs. (combo)

* Ultimate FX Loop ($100)
* Passive Effects Loop ($25)
* Custom 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):

* Master Volume (PPIV)
* 6CA7/EL34 output valves

Please specify options during ordering, or contact us within 10 days after placing order. Want an option that's not listed? Email us!

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


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BASE PRICE: $1649 US (2x12 COMBO)

I have read the Purchaser & User agreement.

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, Lightning builds, Epiphone Valve Junior 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, m50, m50, g50, dragonfly, marshall, fender, jtm50, jmp, jcm, superlead, plexi, 15 watt, 18 watt, 40 watt, 45 watt, 50 watt, 50 watt, single ended, 5E3, bassman, matchless, trainwreck, epiphone valve junior, blackheart, tweed, deluxe, curt granger, birmingham alabama