Owner’s Manual MOON Series 310 LP Phono Preamplifier
10LP Phono Preamplifier Important Safety Instructions 1. Read these instructions. 2. Keep these instructions. 3. Heed all warnings. 4. Follow all instructions. 5. Do not use this apparatus near water. 6. Clean only with a dry cloth. 7. Do not block ventilation openings. Install in accordance with the manufacturer’s instructions. 8. Do not install near any heat sources such as radiators, heat registers, stoves or another apparatus that produces heat. 9.
310LP Phono Preamplifier Important Safety Instructions (cont’d) The lightning flash with the arrowhead symbol, within an equilateral triangle, is intended to alert the user to the presence of uninsulated “dangerous voltage” within the product’s enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons.
310LP Phono Preamplifier Table of Contents Introduction .................................................... 6 Unpacking ....................................................... 7 Installation & Placement ................................... 7 Circuit Board Layout ......................................... 8 Internal Settings .............................................. 9 Rear Panel Connections ....................................12 Using the 310LP with an External Power Supply ...13 Operating the 310LP ..
310LP Phono Preamplifier Introduction Thank you for selecting the MOON 310LP Phono Preamplifier as a part of your music/cinema system. This component has been designed to offer state-of-the-art high-end performance in an elegant package, while retaining all the sonic hallmarks on which Simaudio has made its reputation. We have spared no effort to ensure that it is amongst the finest phono preamplifiers available.
310LP Phono Preamplifier Unpacking The MOON 310LP phono preamplifier should be removed from its box with care. The following accessories should be included inside the box with your phono preamplifier: 9 9 9 9 AC power cable 5/64” Allen key to remove the chassis cover and make internal adjustments This owner’s manual Warranty and product registration information (USA and Canada only) Once the MOON 310LP is unpacked, inspect it thoroughly and report any damage to your dealer immediately.
310LP Phono Preamplifier Circuit Board Layout A B A B C C D D Figure 1: MOON 310LP Circuit Board layout Available Settings: A – Resistance loading jumper bank B – Capacitance loading jumper bank C – Equalization curve jumper bank D – Gain level jumper bank ____________________________________________________________________________________ 8
310LP Phono Preamplifier Internal Settings There are four (4) types of input settings available on the MOON 310LP Phono Preamplifier; Capacitance loading, Resistance loading, Equalization curve and Gain level. Each setting is adjustable through the use of jumpers. For each type of setting, there are 2 banks of jumpers – one each for the left and right channels. This is the result of the 310LP’s genuine mirror-image circuit design which yields exceptional stereo separation.
310LP Phono Preamplifier One of the five jumper sockets for each channel must always have a jumper inserted into it, otherwise the 310LP will not produce an output signal. As well, you should always maintain the same resistance setting for both channels, otherwise sound will vary between the left and right channels of your audio system. Finally, it is strongly recommended that you never use the 47kΩ resistive load setting for moving coil cartridges.
310LP Phono Preamplifier Equalization Curve: The MOON 310LP Phono Preamplifier is equipped with circuitry for two (2) different equalization curves; The RIAA standard and the less common IEC modified curve. The main difference is that the RIAA curve produces a flat frequency response from 20Hz to 20kHz; The IEC curve acts as a subsonic filter removing inaudible infrasonic bass below 20Hz.
310LP Phono Preamplifier The factory default gain setting is 40dB, whereby all three jumpers in each bank are mounted to the left. In the event that you are using a MC cartridge, you will need to change the gain setting to either 54dB, 60dB or 66dB. The basic rule to determine gain for a MC cartridge is as follows: For a low output MC cartridge (0.7mV and lower), set the gain level to 66dB; for a medium output MC (0.7mV to 1.5mV) set the gain level to 60dB; for a high output MC (> 1.
310LP Phono Preamplifier Using the 310LP with an External Power Supply The MOON 310LP Phono Preamplifier can be operated with the optional MOON 320S Power Supply (purchased separately). Referring to figure 11 below, you will see an array of four (4) jumper sockets labeled STR1, STR2, STR3 and STR4. The factory default position for the 2 jumpers is in sockets STR2 and STR4 (positions B in figure 11).
310LP Phono Preamplifier Operating the 310LP We recommend that you leave your MOON 310LP Phono Preamplifier powered up at all times to maintain optimal performance. If you plan to be away from your home for a few days, powering off the Phono Preamplifier may not be a bad idea. Once fully “broken-in”, please keep in mind that your 310LP will require several hours of playing time before it reaches its peak performance after you’ve powered it up again.
310LP Phono Preamplifier Specifications Circuit Layout ................................................ Power Supply Transformer .............................. Power Supply Capacitance ............................. Single-ended inputs ........................................ Input Impedance - Adjustable ........................ Input Capacitance - Adjustable ....................... Single-ended output ...................................... Balanced output ............................................
