Price: 1550 EUR excluding shipping.
These pictures of Eternity is not the stock version. It has many add-ons including tube rolling.
Eternity is basically a low power version of Infinity. A SET, single ended triode, amp with open loop (no gNFB) and parafeed output. The input stage, using the 6AV6 tube, is grid (fixed) biased. Followed by CCS loaded source followers that 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.
The output stage is also SE and grid biased, using the 6S19P tube. All tube anodes are gyrator loaded. Both B+ and B- supplies are regulated.
Eternity, just like Infinity, will have more of the old tube sound than Oblivion and Citadel has. This is because it’s single ended. The balanced amps cancels a lot of distortion and are also constant current draw amps, while Eternity is not. It’s a matter of taste what sound signature you prefer.
Eternity can drive efficient speakers as well as headphones. Power output is 3W into 8 ohms.
Here’s Infinity and Eternity side by side.
Here’s a slightly deeper version to accommodate a 12.6V filament transformer.
More pictures and info on the amps page
Height: 180mm incl. anti-vibration feet and tubes.
Depth: 305mm incl. knobs and I/O jacks.
Width: 330mm, faceplate is 340mm
2 x 6AV6 for input stage
2 x 6S19P for output stage
Single ended 2 x RCA
¼” headphone jack
1W into 8ohms, 430mW into 20 ohms, 170mW into 50 ohms, 90mW into 100 ohms, 45mW into 200 ohms, 30mW into 300 ohms.
With optional impedance switch:
Low: Same as above
High: About three times the low impedance setting.
Low/high impedance switch: 120 EUR
Speaker outputs (3W): 175 EUR
Pre-amp outputs with selector switch: 175 EUR
XLR inputs (for convenience): 65 EUR
XLR headphone jack (for convenience): 65 EUR
Tube rolling with bias adjustments: 200 EUR
Redesign around different tubes to your liking: 100 EUR
Silver tube guards: 150 EUR
Please visit the contact page to order or ask any questions.