English: Hybrid (tube for preamplification, transistors for amplification) high end headphone amplifier. Top right is the power input with a noise filter, below it a toroidal transformer and to the bottom the RCA plugs. The tube on the left part of the PCB is a double triode (one for each channel) for the preamplification stage. Above and below it are two separate volume controls. Bottom left is a 6.3mm stereo plug. In the middle of the board is the input from the RCA plugs and right next to it are the transistors used for the last stage of amplification.
I, the copyright holder of this work, hereby publish it under the following licenses:
Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled GNU Free Documentation License.http://www.gnu.org/copyleft/fdl.htmlGFDLGNU Free Documentation Licensetruetrue
to share – to copy, distribute and transmit the work
to remix – to adapt the work
Under the following conditions:
attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.