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 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. • Powerful Driving Circuitry. Allnic believes in the importance of using high-quality, low noise and powerful driving circuitry in all its amplifying devices. The T-1800 MK2 uses only two stages of driving circuit. • “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. • Large Nickel/FeSi Core Output Transformers. As with our other models, Allnic uses very large output transformers (96 mm) with nickel, mixed with FeSi, cores. This provides for higher inductance with fewer windings than other designs can provide and results in the great benefit of an extremely wide range of output frequencies. • “Soft-start” Circuitry. Allnic uses soft start circuitry that, after sufficient warm-up only, provides the high voltage supply to the plate of each tube. This protective design results in prolonged tube life and fewer and less frequent issues with tube performance. • Analogue Power Tube Current Monitors. In order to provide constant current (bias) monitoring for the power tubes, Allnic uses a separate analogue current meter for each tube. The meters make it exceptionally easy to see the status of each tube at any time. The meters offer a simple, unambiguous indication of each tube’s status compared to conventional LED bias monitors. Specs 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
