SOLDERLESS OPTION - PC boards come fully assembled and tested. just screw it together and be playing music in super quick time..... Free delivery within Australia.

Tube Stereo Amplifier

 Build this great sounding, quick and easy Class-A  tube stereo amplifier. 

The Red Roo SE5 Tube Amplifier Kit

The Red Roo SE5 tube amplifier kit is a top-quality, compact single-ended class-A stereo amplifier that can power loudspeakers or headphones.

It has a 5 Watt RMS output and uses a two-stage triode Constant Current Draw Amplifier (CCDA) driving a single-ended (SE) EL34 output stage. The kit includes two sets of RCA inputs, a 3.5mm jack input, and a Bluetooth input for streaming from your smartphone or computer.

The EL34 single-ended output stage can be configured in triode, pentode, or ultra-linear modes, with ultra-linear being the recommended mode for a balance between low distortion and high power.

The tube amplifier kit is easy to build and measures only 185mm wide, 215mm deep, and 165mm high. It uses high-quality components such as audio-grade polycarbonate coupling capacitors, low ESR conductive polymer hybrid aluminium electrolytic cathode-bypass capacitors, and large output transformers for accurate bass reproduction.

The front panel has a large solid metal volume knob and toggle switches for power on-off and input selection, and a 1/4-inch headphone jack. The rear panel has input connectors, speaker connectors, a speaker impedance switch, and a feedback on-off switch.

The tube amplifier kit is designed for safety, with mains power not entering the chassis and a unique power supply design, DC heaters, and earth-loop protection to eliminate power supply-induced hum or buzz from the speakers. The PC Boards are extra thick with 2-oz copper tracks for enhanced durability and heat transfer.

The kit is available as a solderless option, as a full kit of individual parts, or as a weekend amp camp in the Blue Mountains west of Sydney. The kit has hazardous voltages up to 280V DC requiring care during assembly.

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SE5 Solderless Kitset
SE5 Solderless Kitset

 

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