MOON Series
250i / i-1 Integrated Amplifier
Launched: 2007
Discontinued: 2013
MOON 250i Silver MOON 250i Black
The MOON 250i delivers "audiophile" performance in an affordable and elegant package. Designed with numerous convenient features, this integrated amplifier will provide for years of hassle-free musical enjoyement. Over thirty years of experience in the design and manufacturing of award winning high-performance audio components has paved the way for the 250i. Using numerous technologies found in our other highly sought after integrated amplifiers, the MOON 250i, rated at 50 watts/channel into 8Ω (100 watts/channel into 4Ω) produces an astonishing level of sonic performance with no equal in its price range.

250i Photo Gallery

Inside view of the 250i
Rear view of the 250i

250i Technical Features

· An oversized power supply using a custom toroidal transformer design
· 6 line-level inputs including a front-mounted 1/8" mini-jack for personal media players
· Headphone output on 1/4" TRS jack located on the front panel
· "Class A" output to 5 watts for greater efficiency
· Heat-sink free design incorporating an aluminum chassis for evenly distributed heat dissipation
· RS-232 port for (i) full unsolicited bidirectional feedback and (ii) firmware updates
· IR input for external control
· SimLink™ controller port for 2-way communications with other compatible MOON components
· PCB w/ pure copper tracings & gold plating that yields low impedance characteristics
· Rigid chassis construction to minimize the effects of external vibrations
· Optimized selection of very high quality electronic components
· Low operating temperature for an ultra-long life expectancy
· Includes CRM-2 remote control.
250i Detailed Specifications
Type Solid State
Configuration Single-ended / 2-channel
Power Supply Transformer 320VA
Power Supply Capacitance 20,000µF
Class of operation - Amplifier A/AB
Single Ended Inputs   (RCA) 5 pairs
Mini-jack Input   (1/8") 1
Input Sensitivity 370mV - 3.0V RMS
Input Impedance 11,000Ω
Preamplifier Output 1 pair
Output Device Types - Amplifier Bipolars - 2 per channel
Output Power @ 8Ω 50 Watts per channel
Output Power @ 4Ω 100 Watts per channel
Output Impedance 0.04Ω
Damping Factor > 200
Gain 37dB
Dynamic Headroom 3dB
Signal-to-noise Ratio 101dB @ full power
Maximum Output Voltage 22 Volts
Slew Rate 20V/µs
Maximum Current - Peak 15 amperes
Maximum Current - Continuous 9 amperes
Frequency Response 10Hz - 100kHz   (+0/-3dB)
Crosstalk @ 1kHz -78dB
IMD < 0.05%
THD   (20Hz - 20kHz @ 1 watt) < 0.015%
THD   (20Hz - 20kHz @ 50 watts)   < 0.02%
SimLink™ Port 1 input + 1 output each on 1/8" mini-jack
RS-232 Port 9-pin female DB connector
IR input 1/8" mini-jack
Remote Control CRM-2 Full Function
Power Consumption @ idle 11 Watts
AC Power Requirements 120V / 60Hz   220-240V / 50Hz
Fuse Replacement   120V   /   220-240V 4.0A long fast blow   /   2.0 long fast blow
Shipping weight 22 lbs / 10 kgs
Dimensions   (W x H x D) 16.9 x 3.5 x 14.4 in.   (42.9 x 8.9 x 36.6 cm.)
  Specifications are subject to change without notice.