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The amplifier measurements here were made using the tubes JS found to be the best-sounding: Western Electric 300B, GE 5692, and RCA 5R4GB.

The Jadis SE300B was warmed up for 1 hour at 1/3 of its rated maximum power of 10W. Nothing unusual was observed in this pretest; the 300B ran typically hot for a tube amplifier. Its input impedance measured a high 135k ohms. The output impedance was 2.5 ohms at 1kHz, 2.7 ohms at 20kHz, and 0.76 ohms at 20Hz. This amplifier's frequency response will be very dependent on the loudspeaker load. Voltage gain into 8 ohms was…

Description: Single-ended triode monoblock amplifier: Tube complement (each): 2 x 300B, 2 x 5R4, 1 x 6SN7. Output impedance: adjustable, for 1–16 ohms. Output power at 1kHz for 0.3% THD: 10W RMS (10dBW). Power bandwidth at 8W: 40Hz–15kHz &#150 dB; 40Hz–30kHz –3dB. Input sensitivity for rated output: 450mV RMS. Input impedance >100k ohms. Power consumption 140W each.
Dimensions: 8" (203mm) W by 9" (229mm) H by 20.5" (521mm) D. Weight: 65 lbs (29.5kg).
Price: $13,000/pair (1996); no longer available (2012).
Manufacturer: Jadis S.A.R.L.,…

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