Custom made 6080/6AS7 OTL headphone tube amp. Uses oil/wax polypropylene capacitors in the high voltage supply and in part of the low voltage heater supply. This amp is better than the Bottlehead Crack, Crack-a-two-a, and Apex Teton. Uses a single voltage amplification stage followed by a current amplification stage. There are no transformers in the direct signal path, and only high quality polypropylene output capacitors. Both the high voltage and low voltage power rails are highly regulated for the cleanest, blackest background and incredible detail. The high voltage supply has a super regulator that is not found in any other amp like this! The input stage is able to take 12AU7, 12BH7, 6SN7, e88CC and many others with the use of tube adapters. I have built in the ability to change the current of the constant current source (CCS) for the input tube to match with any tube that you'd like to run. The power stage uses a 6080 dual triode, which can optionally be replaced with a number of other power tubes like the 7236, 5998, or 6528, tailoring the sound to your headphones and musical preferences. This amp can even use the 6336 tube (higher power than two 6080 tubes in parallel!) as shown in the images in this ad. Volume control is via a custom stepped resistor attenuator - One of the best volume control there is for fidelity! Better than rotary pots seen in most other amps. This is the three control knobs you see on this amp (one does coarse volume steps, the other two controls fine volume for each separate channel)!! Has output connector option for both single ended and balanced headphones. The base is made out of beautiful black walnut wood, and stained with boiled linseed oil and tung oil. Comes with a large assortment of tubes: Driver tubes: (1X) Shuguang 6SN7 (1X) Sovtek 6H8C (1X) Sylvania (Zenith Branded) 12BH7A (1X) General Electric 5963 (1X) Sylvania 5814A (1X) Adapter for 6SN7 to 12AU7 socket Power Tubes: (2X) Philips ECG JAN-6080WC (1X) Chatham 6336 (1X) SED 6H13C I'll provide a 10 year warranty on the amp overall, and a 2 year warranty on the tubes.