EternalArts Headphone Amplifier OTL-KHV Professional
|
OTL headphone amplifier with balanced input for professional
recording studios The EternalArts OTL headphone amplifier, the transfer
of genius Futterman idea to tube amplifiers for high end headphones. · A
compact tube amplifier building block for the connection of two
Headphones in the powder-coated steel housing with perforated Aluminium
cover, transparent acrylic front, turned from acrylic glass Volume knob
and slip-resistant silicone rubber feet · Developed with and optimized for high-end headphones from HD800 SENNHEISER · Balanced inputs selected with input transformers EternalArts · Optimization to operate with two sets of headphones and low Headphones> 20 ohms · Separate channel circuit design with 4 tubes: 2 selected EternalArts triode-pentode, 2 stabilizer tubes gain independent stable anode voltages of the amplifier tubes · Platinum-supported structure with gold, 70μ-sided laminated Conductors · Molded Transtec much voltage transformer in toroidal Protection technology with winding between primary and secondary Winding packages · High-quality components selected, classic blue ALPSPoti, gold-plated headphone jacks, XLR connectors · In many cases, secured, totally stable circuit for maximum security and high tube life · Large bandwidth and rapid pulse train · Circuit Description A potentiometer the signal reaches the grid of the triode The triode-pentode. At its cathode is an RC network with R adjustable to control the gain of the triode can. The Anode then controls via an RC element, the control grid of the pentode. Through the cathode follower circuit is a low internal resistance achieved. At the cathode, then the signal is coupled out, wherein be eliminated by a capacitor dc components. The outputs are protected by a fast fuse, two Zener diodes are used as surge protection for the headphones. A special feature is a stabilizer tube is in the circuit, the anode voltage of the triode-pentode, regardless of their Modulation constant. The latter is heated by dc
|