K4040B - Stereo Valve Amplifier (Black) Kit

For most of us a high power valve amplifier is unaffordable. The K4040B Stereo Valve Amplifier (Black) self-assembly electronic construction kit changes that, so that now everybody can enjoy that sublime "valve sound". The sound of valves cannot be surpassed, neither by transistors nor FETs.

In the development process, special attention was given to the housing so that the expensive valves are displayed in a visually attractive manner. The most vulnerable point of a valve amplifier are the output transformers; that's why we use ultra-linear and overrated output transformers (toroidal) to guarantee a rich bass response.

To extend the life of the precious valves, the amplifier has a switch-on delay so that the high voltage is switched on when the valves are warmed up.

Features

• pure valve sound with high-quality EL34 valves
• high-quality black and chrome housing
• chrome valve socket covers
• easy bias adjustment with LED indication
• removable bottom for easy access and service
• high-quality capacitors and components
• gold-plated input and speaker terminals
• standby function
• "soft-start" circuit for power transformer

Images Gallery

 

Specifications

• output power: 2 x 90Wrms music power for loads of 4 or 8 ohm
• power bandwidth: 15Hz - 40kHz (-3dB ref. 50W)
• frequency range: 8Hz - 80kHz (-3dB ref. 1W)
• harmonic distortion: 0.08% (1kHz / 1W) / 0.7% (1kHz / 90W)
• signal-to-noise ratio: > 105dB (A-weighted ref. 90W)
• channel separation: > 75dB (ref. 90W)
• input impedance: 34Kohm
• input sensitivity: 1Vrms at 95W
• damping factor: > 10 (100Hz)
• weight: 17Kg
• dimensions: 425 x 130 x 350mm (16.7" x 5.1" x 13.8")
• Product format: self assembly electronic construction kit (KT more)

Files

• illustrated_assembly_manual_k4040_rev1.pdf
• assembly_manual_k4040b.pdf