Simaudio MOON Evolution 740P Analog Preamplifier - Complete w/Remote, Box, and Manual

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Top of the line dual-mono preamp from Simaudio and upgradable with an optional outboard power supply. $9000 list price.

This preamplifier comes with a transferable warranty until 10-31-2025, as long as the buyer has our partner company Stereo Exchange register the warranty (Stereo Exchange is an official authorized Simaudio dealer).

Built like a tank utilizing the best components available in the industry with the most elaborate and best looking aluminum machined chassis we've every seen. 

Super bright large display which is easy to see across a room, tons of balanced and single ended inputs/outputs, and still under the manufacturer warranty. 

This listing comes completed with the original remote, box, manual, and power cord.  

Design features:
• Power supply voltage regulation includes i 2 DCf (Independent Inductive DC Filtering); 1 inductor for each and every IC in the audio circuit’s signal path – 24 stages in all.
• 4 stages of our M-LoVo (MOON Low Voltage DC regulation); a highly sophisticated circuit virtually free of noise, yielding exceptionally fast, precise, and very stable DC voltage.
• Gain offset adjustment of ±10dB for each line input.
• Fully compatible with 820S external power supply.
• Each line input is fully configurable to be “home theater ready”, whereby the 740P’s volume control is bypassed. 

Click here for a PDF copy of the Simaudio Moon Evolution 640P Owner's Manual

Our Testing Process for Preamplifiers at SkyFi:

We start with a visual inspection of all internal components to make sure there are no signs of stress or aging. Capacitors are checked for telltale sings of bulging or leaking, resistors are checked for signs of overheating or cracking, and transistors are checked for signs of stress or damage. Special attention is paid to the power supply which is the most common source of failure for preamps. We then power up the unit and run a simple 1k sine wave while monitoring the low voltage output on an oscilloscope for signs of distortion or noise to get a baseline.

At this point we will lubricate and clean all switches and potentiometers (that are not sealed) with a high quality contact cleaner, and then re-test all functions for any signs of noise or scratching.

Final testing involves putting actual music through the preamplifier We have learned over time that some issues are only noticeable to a trained ear while listening to a familiar source material. Our test bench has reference vintage Kef speakers that we are super familiar with which will quickly reveal any discrepancies. Some preamps will then move into the listening room where they will be tested with our in-house reference system.

Specifications:
Number of inputs - XLR / RCA
2 pairs / 3 pairs

Input Sensitivity
200mV - 4.0V RMS

Input Impedance
22,000Ω

Gain
9dB

Number of Output - XLR / RCA
1 pair / 2 pairs (fixed + variable)

Signal-to-noise Ratio (20Hz-20kHz)
120dB @ full output

Frequency response (full range)
5Hz - 100kHz ±0.1dB

Crosstalk @ 1kHz
-116dB

Output impedance
50Ω

THD (20Hz - 20kHz)
0.001%

Intermodulation distortion
0.0003%

Shipping weight
35 lb / 16 kg

Dimensions (width x height x depth)
18.75 x 4.0 x 16.5 in
47.6 x 10.2 x 41.9 cm

Please click here for detailed specifics regarding our specialized packing process that separates us from the rest.