The Red Roo 'Rockstar' tube guitar amplifier kit is now available.
The 'Rockstar' tube guitar amplifier is intended for home, small to medium size venues, or studio use. It's a progressive distortion design featuring separate gain and volume controls that allow you to wind in any desired amount of overdrive - anywhere from clean to lead - at any sound level.
The preamplifier section is a multi-stage progressive distortion design, with several 12AX7 stages in cascade, alternatively biased hot and cold. An effects loop can be connected between the preamplifier and power amplifier sections, with an effects by-pass switch if not required.
The power amplifier section uses a 12AT7 voltage amplifier and an NPN transistor phase splitter driving the output stage. The output stage is push-pull using either EL34, 6L6, or similar tubes giving about 20 Watts RMS into 4, 8, or 16 ohm speakers. Using a different type of output transformer it can be configured as a parallel/single-ended output stage giving about 8 Watts of pure Class-A sound from two 6V6 tubes.
The front panel has controls for Gain, Bass, Midrange, Treble, Volume, Presence, and Depth. This combination gives you a great ability to tailor the sound to your taste, and there is an optional compression control that winds back the output stage headroom if you like that highly compressed tube sound. There is also a Mute switch with an HT-ON indicator light.
The rear panel has 6.5mm jack connections for the effects loop and 4/8/16 ohm speaker outputs, an effects bypass switch, and optional compression control.
Like the SE5 stereo amplifier, the power supply uses an external 12V 10A desktop power adaptor, improving builder safety by avoiding 240V mains wiring within the chassis and avoiding hum problems by supplying DC to the tube heaters.
Most small components are mounted on a PC Board, so tricky point-to-point wiring is minimised. The front panel components (potentiometers etc.) can either be soldered or plugged in for ease of assembly and replacement.
Red Roo kits are professionally designed and use top-quality components. They sound great and should last you a lifetime.
For the ultimate building experience check out the weekend amp camp in the Blue Mountains west of Sydney.
If you need any further information about the Red Roo tube guitar amplifier Kit, please contact us.
A Tube guitar amplifier is also known as a valve guitar amplifier.
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