Price: 2150 EUR excluding shipping.

The topology is fully balanced, open loop (no gNFB) amp with parafeed transformer output. Citadel is all balanced. Fully balanced means each stage from XLR inputs, the potentiometer, all active stages and output are balanced, from start to finish. CCS loaded source followers drive the output tube grids. The grid drivers relieve the input tube of any drive duty. Tubes do only voltage amplification. Tubes do what they do best and FETs do what they do best, supply current.

All tube anodes are gyrator loaded. Both B+ and B- supplies are regulated.

Citadel gets rid of any “impurities” that the SE input stage in Oblivion might add. This gives the amp a cleaner sound with even lower THD while Oblivion will have some of the old “tube sound”.

This amp can drive most headphones from very low impedance up to high impedance with ease. It’s also capable of driving speakers.

The speaker outputs are also balanced, meaning the black terminal is not ground but is carrying signal in anti-phase to the red terminal. This is a great way to drive a speaker coil.

Custom version of Citadel with silver chassis and 6P7S output tubes

More pictures and info on the amps page

Specifications
Dimensions:
Height: 225mm including spikes and tubes.
Depth: 350mm incl. knobs and speaker outputs.
Width: 435mm, faceplate is 450mm.
Tubes:
2 x 6H9C (6SL7) for input stage
4 x 6P31S (EL36) for output stage
Inputs:
Balanced 2 x 3-pin XLR
Headphone output:
Balanced 4-pin XLR
Power output:
3.2W into 8ohms, 1.62W into 20 ohms, 660mW into 50 ohms, 336mW into 100 ohms, 168mW into 200 ohms, 104mW into 300 ohms.
With optional impedance switch:
Low: 3.2W into 8ohms, 1.62W into 20 ohms, 660mW into 50 ohms, 336mW into 100 ohms, 168mW into 200 ohms, 104mW into 300 ohms.
High: 3.9W into 20 ohms, 1.92W into 50 ohms, 960mW into 100 ohms, 480mW into 200 ohms, 320mW into 300 ohms.

Optional add-ons:
Speaker outputs with selector switch: 175 EUR
Line level RCA outputs (for active subwoofer): 60 EUR
Low/high impedance switch: 120 EUR
Pre-amp outputs (3-pin XLR) with selector switch: 175 EUR
SE ¼” headphone jack with switch: 130 EUR
RCA single ended inputs: 65 EUR

Please visit the contact page to order or ask any questions.