Descrição
Estado de conservação: 9/10
The Moon i3.3 is one of a growing number of integrated amps to include a digital input, either as standard or, as in this case, as an optional extra.
It makes a lot of sense: you don’t need a huge amount of circuitry to make a pretty decent DAC and if you’ve got a case and power supply already it’s quite a simple addition.
Electrical, optical and USB connections are provided, with the actual conversion being done by a good-quality, recent DAC chip supported by good passive components and onboard supply regulation. Sample rates up to 192kHz are supported (48kHz on USB).
The features are simple, with just four analogue inputs at the rear and one (mini-jack) at the front, next to the headphone socket. Output is rated at 100 watts per channel, the output current conveyed via two pairs of transistors marked with Moon’s own part code.
The inside of the amp is quite busy, with circuits surrounding the mains transformer. Components are a mix of through-hole and surfacemount and also a mix of discrete transistors and integrated circuits. Input switching is electronic, but the volume control is a motorised potentiometer. Basically this is a fully traditional integrated amp plus digital input, but it is a very solidly built one and little touches like very high-quality output terminals add to the appeal.
Specifications
Description: Solid-state integrated amplifier with remote control, headphone output, RS-232 port, IR input for external control, 12V trigger output for remote operations, optional phono stage, balanced input stage, and digital input stage. SimLink controller port permits communication with compatible Simaudio Moon components. Inputs: 5 line-level, including front-mounted 1/8″ mini-jack for personal media players; 1 input functions as pass-through, bypassing the gain stage. Outputs: one pair of speaker binding posts, headphone on 1/4″ jack, one pair variable preamp outputs, one pair fixed line-level outputs. Maximum output power: 100Wpc into 8 ohms (20dBW), 200Wpc into 4 ohms (19dBW). Maximum output voltage: 22V. Maximum output current: 15A peak, 9A continuous. Input impedance: 11k ohms (line), 47k or 100 ohms (phono). Output impedance: 0.04 ohms (speaker). Voltage gain: 37dB. Dynamic headroom: 3dB. S/N Ratio: 101dB ref. full power. Channel separation: 78dB at 1kHz. THD: <0.15% (1W, 20Hz–20kHz), <0.02% (50W, 20Hz–20kHz). Intermodulation distortion: <0.05%.
Dimensions: 16.88″ (430mm) W by 3.5″ (89mm) H by 14.75″ (375mm) D. Shipping weight: 28.6 lbs (13kg).
Finishes: Black