Allnic Audio T-1800 MK2 Integreret Rør Forstærker

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The T-1800 MK2 stereo integrated amplifier is Allnic Audio’s EL34 stereo integrated amplifier model. Like all Allnic Audio products, the T-1800 MK2 has Permalloy (iron and nickel alloy) for its transformer cores. Allnic is grateful to Mr. G.W. Elmen of Western Electric for inventing Permalloy for transformer core use, and in so doing, providing an enormous service to recorded music listeners everywhere.

40 watts per channel of push-pull power output
Remote controlled 41 step silver contact attenuator
Nickel alloy output transformer
Self-bias control grid
Analog power tube current monitoring meters
Soft-start Circuitry

Technical Specification

Output Power
40w + 40w (4 or 8 load, at 1kHz)
Distortion
0.1% at 1kHz at 2.83V
Frequency Response
20Hz-20kHz flat
S/N Ratio
-80dB (CCIR, 1kHz)
Damping Factor
8 at 8Ω load at 1kHz
Voltage gain
+38dB
Input Impedance
10kΩ (single-ended, unbalanced)
Input Sensitivity
400mV for rated power
Tubes
EL34 x 4 (power triode); E180CC x 2 (2nd stage driver tube: similar to 5965 and 7062); 12AY7 x 1 (1st stage driver: possible to substitute 6072)
Dimensions(WDH)
430mm (16.93 inches) x 330mm (13 inches) x 210mm (8.3 inches)
Weight
20kg (44 lbs) net; 23kg (50.6lbs) shipping

The T-1800 MK2 has the following features:

• 40 watts of high power output. The T-1800 MK2 is a push-pull, EL34 power tube based stereo integrated amplifier.

• Remote controlled 41 step silver contact attenuator. The T-1800 employs this house made quality attenuator instead of standard, outsourced carbon film potentiometers. The Allnic attenuator provides complete channel balance and less distortion.

• “Full Engagement” Output Transformers. Conventional output transformers use pre-set secondary windings to accommodate 4, 8 and 16 ohm loudspeaker loads. However, these conventional transformers utilize only one secondary winding at a time, while the other secondary windings remain “idle”. This approach has two adverse effects. First, the output transformers are not working at their maximum efficiency, reducing their output relative to their potential. Second, the “idle” windings are not actually “idle”; they are subject to parasitic oscillations, producing their own “signal”. This undesirable electrical information is additive to the transformer’s output, distorting the amplified signal going to the loudspeaker. Allnic’s “Full Engagement” transformers address these issues by having 4 independent, secondary windings that are always fully connected, never “idled”. This means that all secondary windings are always connected to your loudspeakers, regardless of which output switch position you use (4 ohms or 8 ohms or 8 ohms or 16 ohms, depending on the factory configuration you have selected). The result is that there is neither a loss of transformer output efficiency, nor the introduction into the output signal of distortion from parasitic oscillations of the secondary windings.