Simaudio P 5.3 User Manual

 

 

Introduction 

 

Your  MOON P5.3 Stereo Preamplifier incorporates many significant design features to achieve its “world class” level of 
performance.  This is an abbreviated list of the more important features: 

 

 

An oversized power supply using 2 toroidal transformers in conjunction with 3 stages of DC voltage regulation and 
extensive choke filtering

 

 

An extremely short capacitor-free signal path measuring only 10 inches in length, from input RCA connectors to 
output binding posts, for a faster transient response. 

 

M-eVOL volume control circuit based on a resistive array configuration, resulting in no sonic degradation of the audio 
signal regardless of the selected volume setting

 

 

Power supply voltage regulation includes i

DCf (Independent Inductive DC Filtering); 1 inductor for each and every IC 

in the audio circuit’s signal path – 14 stages in all.

 

 

IR input for external control. 

 

12 Volt Trigger output for remote operations. 

 

One single-ended audio input, of your choice, which functions as a “pass-through”, bypassing the gain stage to 
accommodate a component such as a home-theater processor, whose own volume control is used instead. 

 

Optional end-user configurable phono section for both moving coil and moving magnet cartridges. 

 

Extremely rigid chassis construction to minimize the effects of external vibrations. 

 

A symmetrical circuit design with accurate matching of the very finest high quality electronic components. 

 

Four-layer PCB tracings; The advantages include better ground and power supply circuit layouts resulting in a much 
shorter signal path and dramatically improved signal-to-noise ratio. 

 

Designed to be powered up at all times for optimal performance. 

 

Low operating temperature for a longer than normal life expectancy. 

 

 

Installation & Placement 

 
The MOON P5.3 requires reasonable ventilation to maintain an optimum and consistent operating temperature.  As a result, 
it should be placed in a location with empty space around it for proper heat dissipation. As well, it should be placed on a solid 
level surface. You should avoid placing it near a heat source or inside a closed cabinet that is not well ventilated as this could 
compromise this component’s performance and reliability. The P5.3 uses toroidal transformers; even though they are well 
shielded, you should not place the Stereo Preamplifier too close to source components sensitive to EMI, such as turntables 
and phono preamplifiers.  

You should never place another component directly on top of this Stereo Preamplifier.

 

 

Once you’ve decided on a location for the P5.3, you should install the four (4) pointed screw-on tips into the four (4) 
cylindrical legs of the chassis. These tips will easily scratch most surfaces, therefore it’s advisable to follow these instructions:  
Place your P5.3 on a soft surface (i.e. carpet) and carefully turn it so that it rests on its side. Screw one tip into each of the 
four legs.  Carefully move the chassis to it’s pre-determined location.   In the event that the surface you have chosen isn’t 
perfectly level, each of the four (4) tips on your P5.3 are height adjustable; Included with these tips is a small metal rod, 
intended for final adjustments (if necessary) by simply threading it through the tiny hole of each of these tips and then gently 
turning the tip.  These adjustable screw-on tips also provide mechanical grounding of the chassis. 
 

 

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Introduction  /  Installation & Placement        

 

 

 

 

 

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