Elekit 300B/2A3 SE Power Amp Kit (TU-8900) with Lundahl LL2785B OPTs

$3,450.00

DESCRIPTION

New design; available now

As the name suggests this new power amp from Elekit supports both the 300B and 2A3 tubes in a single-ended tube amp kit. The 300B with its rich
midrange and extended bass - and 2A3 with its delicate expression and gentle tone - offer a very special sonic experience in this new design. This is an amp with amazing sound quality, super low noise, and which can be used with headphones.
Whilst the 300B and 2A3 look similar their operating parameters are quite different. When the amp powers up it automatically detects the tubes installed and corrects the filament voltage and voltage of B-power. This is indicated by the colour of the volume knob surround LEDs.

The headphone volume and impedance settings can be changed by simply moving the jumper location on the PCB. Ample space for larger coupling capacitors on the PCB is also provided.
The power transformer has independent windings for the right and left channel to minimize the interference between channels as much as possible. The filament power uses the latest DC-DC converter with extremely low noise and high efficiency. Schottky barrier diodes and fast recovery diodes are used as rectifying diodes that reduce even the most negligible noise spikes. Listeners can enjoy music free from noise even when using a pair of high efficiency headphones. The main circuit of the power unit is unitised per channel as a module.
This version of the TU-8900 is supplied with specialist Output Transformers from Lundahl of Sweden, the LL2785B. The quality of a tube amplifier’s OPTs is extremely important, especially so for single-ended amplifiers. Design is all important as an air gap in the transformer is needed to prevent transformer core saturation, which would cause audible distortion and other problems. Herein lies the challenge: having an air gap lowers the inductance, which compromises low-frequency response yet to increase the inductance requires adding more windings, which adversely affects the high-frequency response.
Sweden's Lundahl is a specialist designer and manufacturer of high performance transformers.

Tube Friendly design: Warm-up time for directly-heated tubes and indirectly-heated tubes are different. In most designs, directly-heated tubes warm up faster than indirectly-heated tubes. So directly-heated tubes are often overloaded. With TU-8900, the voltage is gradually raised which reduces the level of overload to the directly-heated tubes.
Note re Tubes:

Tubes are not included in standard kit supply. Customers may request tube supply at time of purchase.

Amp Camp, Virtual Amp Camp and Build For You options include tubes.