Hamilton-Kolby SPR-210 Amplifier

The Hamilton-Kolby SPR-210 Amplifier is a premium quality, hand-made mid-size combo amplifier built in the 50's tweed tradition. Powered by a pair of 6L6GC/5881 beam power tubes, this combo amp delivers a classic sound, owing to its finger-jointed pine cabinet, two 10" AlNiCo magnet speakers, and 5F4 vacuum tube circuit. Traditional chassis-mounted steel pots, SwitchcraftTM jacks, eyelet-board construction, and hand-soldered connections make this a rugged, reliable, and road-ready device. An optional reverb module provides a classic "large hall" ambience.

Hamilton-Kolby SPR-210R Amplifier

Made in U.S.A.
Specifications subject to change without notice.


Power Output: 25 RMS Watts into 4 ohms
Circuit: "5F4" Class AB push-pull
Speaker: Two 10" Jensen P10Q (or Weber AlNiCo Sig-10S)

Construction: Plated steel chassis; Hand-wired, point-to-point vulcanized fiber circuit board with brass eyelets. Pine finger-jointed cabinet; Light lacquered Tweed Covering.

Inputs: 2 Normal; 2 Bright, 1/4" jacks
Outputs: 4 ohm speaker, internal and external, 1/4" jacks
Controls: Volume Normal, Volume Bright, Treble, Bass, Presence, Power On/Off, Standby On/Off, 3A "Slo-Blo" Fuse. Reverb option has reverb level control accessible at rear of amplifier cabinet.

Height: 19-1/4 " (20-1/4" to top of handle)
Width: 22-1/2"
Depth: 10-1/2 " at base; 9-1/2 " at top
Weight: 45 lbs.
Power Consumption: 120VAC, 200W

Tube Complement - Amplifier Section:
3 12AX7 Low-Noise Dual Triode
2 6L6GC/5881 Beam Power Tetrode
1 5U4G Rectifier

Tube Complement - Optional Reverb Module:
1 12AX7 Low-Noise Dual Triode
1 12AT7 Medium-MU Dual Triode

H-K VTR1 Reverb Module
with 17" spring reverb (medium or long delay)
Customer specified amp covering extra.
Customer specified loudspeaker extra.
Customer specified NOS or boutique tubes extra.


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Hamilton-Kolby Custom Electronics
Acton, Massachusetts, USA


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