High End Tube amplifier (180 Watt Stereo)
For most of us a high power tube amplifier is unaffordable. This kit changes that, so that now everybody can enjoy that sublime "tube sound". The sound of tubes has never been surpassed by transistors or by FETs. In the course of developing this amplifier, special attention was given to the housing so that the expensive tubes are on display in a way that is very pleasing to the eye.
The weakest points of a tube amplifier are the output transformers; that's the reason why we use ultra-linear and over-rated output transformers (toroidal) to guarantee a rich bass response. To extend the life of the precious valves, the amplifier is provided with a switch on delay, so that the high voltage is switched on when the tubes are warmed up.
- pure valve sound with high quality EL34 tubes
- 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
Specifications:output power: 2 x 90Wrms music power for loads of 4 or 8 ohmpower 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: 34Kohminput sensitivity: 1Vrms at 95Wdamping factor: >10 (100Hz)weight: 37.5lbdimensions: 16.7" x 5.1" x 13.8"
--> I just finished building a K4040 tube power amplifier and must tell you how pleased I am with the product. The sound is very clean, with a tight bass, no hum or hiss and a transparent sound. The building process was good (I built many Heathkits years ago). Fitting the circuit board to the chassis was a bit of a challenge. I finally loosened the hardware on the tube sockets, which allow me to line up the mounting screws on the chassis much easier. I broke a bias potentiometer in the process and ElectroKits (your USA dealer) send me a replacement quickly, at no cost. An autobias circuit in a future model would be a nice addition, doing away with the many pots and the LEDs.
Why doesn't Velleman bring out a nice tube preamplifier, to complement my fine amplifier?
It is nice to hear the great tube sound again.