Plinius M14 Manual de usuario

Phono Preamplifier

CONGRATULATIONS

CONGRATULATIONSCONGRATULATIONS

CONGRATULATIONS on your decision to become the proud owner of this

Plinius M14 Preamplifier.

This manual has been prepared to help you understand the operation of your amplifier, and to provide

information about its design and the variety of ways it may be used.

We have designed and manufactured this preamplifier to reproduce faithfully and accurately, your

favourite music. With a little care and a full understanding of the operating recommendations in this

manual, your Plinius M14 Phono Preamplifier will provide years of high-quality, trouble-free performance.

Serial Number: ..................................................................................

Date of Manufacture: ..................................................................................

Final Test Certified By: ..................................................................................

IMPORTANT: PLEASE TAKE THE TIME TO READ THIS MANUAL

THOROUGHLY BEFORE USING YOUR PREAMPLIFIER.

Introduction ...................................................................................................................................Page 3

Precautions ...................................................................................................................................Page 5

Preamplifier Features – Front Panel .............................................................................................Page 6

Preamplifier Features – Rear Panel ..............................................................................................Page 8

Installation and Operation ............................................................................................................Page 10

Input/Output Connection ..............................................................................................................Page 11

M14 Features ..............................................................................................................................Page 13

Specifications .............................................................................................................................Page 14

Index ...........................................................................................................................................Page 15

Contact Details ............................................................................................................................Page 16

Please take special note of the following precautions before operating your new preamplifier:

•This preamplifier operates at hazardous voltage levels. We recommend that any work requiring

removal of the lid or base be referred to a suitably qualified and experienced service technician.

•DO NOT attempt to connect any input of this preamplifier to its own outputs.

•DO NOT earth any output terminal or connect any of these terminals together without following the

instructions in this manual or seeking qualified assistance.

•DO NOT place this preamplifier in any position where liquids or any foreign material may

accidentally enter it.

•DO NOT connect any voltage source, short circuit, earth/ground or appliance (other than suitable

audio preamplifiers) to the phono preamplifier output terminals.

•DO NOT connect any voltage source, short circuit, earth/ground or appliance (other than suitable

phono turntable) to the phono preamplifier input terminals.

The front of the Plinius M14 Preamplifier incorporates all the facilities

you will require on a daily basis.

FRONT PANEL LAYOUT SHOWING GAIN AND CARTRIDGE LOAD

KNOBS, PHASE AND MUTE SWITCHES, AND DISPLAY LED

DISPLAY LED

The Display LED will light whenever the Plinius M14 is operating. The LED will dim (to about half

brightness) when the preamplifier is put into mute.

PHASE SWITCH

Use the phase switch to change the phase response of the Plinius M14 from absolute to inverted 180°.

As labelled on the front panel, absolute phase is selected with the switch to the upper position, and

inverted 180°phase is the lower position.

MUTE SWITCH

Use this switch to mute the output of the Plinius M14. The display LED will dim to show the phono

preamplifier is in mute.

100

470

1 K

47 K

CARTRIDGE LOAD

GAIN

HIGH

LOW

PLINIUS

PHONO PREAMPLIFIER

OPERATE

MUTEPHASE

INVERT

GAIN SELECTION KNOB

Use this knob to set the gain of the phono stage to suit your particular phono turntable. When changing

the gain setting, the output of the Plinius M14 is momentarily muted to prevent any transient offset thump.

CARTRIDGE LOAD SELECTION KNOB

The phono cartridge load can be adjusted to suit your particular phono cartridge using this selection knob.

Use the cartridge load selector to set the load to one of six impedance values; 22Ω, 47Ω, 100Ω, 470Ω,

1kΩ, or 47kΩ. In our experience 47kΩis a suitable ‘all round’ setting, although some cartridges seem to

work well into lower values. Please consult your cartridge manufacturer literature for specific

recommendations.

This panel incorporates all the terminals for connecting the input signals from your phono turntable, CD

player, tuner, etc, and the outputs to the power amp and mains supply.

Please remember that your Plinius M14 Phono Preamplifier is a high quality electronic instrument

capable of an exceptional level of performance. Be sure that you understand your system’s requirements

fully before you make any connection to this phono preamplifier.

REAR PANEL SHOWING INPUT AND OUTPUT TERMINALS,

GROUND LIFT SWITCH, MAINS SWITCH AND MAINS SOCKET.

INPUT TERMINALS

The input terminals of your Plinius M14 Phono Preamplifier are standard RCA terminals for use with single

ended signals from a phono turntable only. It is not wise to connect any other audio source (such as a CD

player) to the inputs of the Plinius M14. Consult your PLINIUS

PLINIUSPLINIUS

PLINIUS dealer for further advice if required.

OUTPUT TERMINALS

Connections for preamplifiers are provided in the centre of the rear panel. Connections are available for

both single ended (RCA type) and balanced (XLR type) cables. Note that the only time the outputs aren’t

‘live’ is when the preamplifier is in mute.

CAUTION

RISK OFELECTRICAL SHOCK

DO NOT OPEN

CAUTION:

TO REDUCE RISK OF

COVER. NO USER SERVICEABLE

PARTS INSIDE. REFER SERVICING TO

QUALIFIED SERVICE PERSONNEL.

CHASSIS

OPEN

CIRCUIT

GROUND

SERIAL No. POWER

CONSUMPTION

50/

15 0 V / A

VOLTAGE Hz DESIGNED AND MANUFACTURED IN

NEW ZEALAND BY

AUDIBLE TECHNOLOGIES LTD

P.O. BOX 1836

PAL MERSTON NORTH

PLINIUS MODEL 14 STEREO PHONO PREAMPLIFIER

INPUT OUTPUT RIGHT

PUSH PUSH

OUTPUT LEFT

GROUND LIFT SWITCH

This switch allows the signal ground to be disconnected from the chassis. In some installations a hum

loop may exist due to duplicate ground paths from different equipment. Use this switch to remove the

connection from 0V to ground thus allowing some flexibility in your particular set-up.

MAINS SWITCH

The heavy-duty rocker switch to the right of the panel turns the Mains/Line Power to the amplifier ON or

OFF. Depress the right hand side of the switch to turn the amplifier on. The amplifier draws a moderately

high current when switched on, so it is not good practice to rapidly turn the Mains switch on and off

repeatedly.

MAINS POWER CORD IEC SOCKET

This connector is where the mains supply cable from your wall connects to the preamplifier. You will

notice that a fuse holder is mounted within this connection, and it holds a mains fuse to provide surge and

overload protection for your preamplifier.

EARTH POST

This is a chassis connected gold-plated earth post for use with certain phono turntables.

PLACEMENT AND VENTILATION

Ventilation through and around your Plinius M14 Phono Preamplifier should be kept unimpeded, so

ensure that the heat vents (slots in the lid) are not covered or restricted in any way. Also refrain from

placing the Plinius M14 on top of other electronic equipment to avoid RF interference being introduced to

the highly sensitive phono stage circuitry.

The Plinius M14 design incorporates a very high level of mechanical de-coupling of the input and output.

However, it can still be influenced by acoustical feedback in the operating environment. The use of

acoustic cones or a suitably spiked preamplifier stand or table, may further enhance the performance of

this preamplifier. Consult your PLINIUS

PLINIUSPLINIUS

PLINIUS dealer for further advice if required.

MAINS VOLTAGE CONNECTION

Firstly, check that the mains supply voltage printed on the rear of this preamplifier is similar to the mains

supply voltage in your area. If in doubt, please consult your PLINIUS

PLINIUSPLINIUS

PLINIUS dealer.

Mains supply power connection is via the supplied plug-in lead. A standard IEC socket connects the

mains power at the preamplifier end, while a local mains plug is required at the wall end.

The wiring code used inside all Plinius product is:

Green to Earth/Ground

Green to Earth/GroundGreen to Earth/Ground

Green to Earth/Ground

Blue to Neutral

Blue to NeutralBlue to Neutral

Blue to Neutral

Brown to Phase/Live

Brown to Phase/LiveBrown to Phase/Live

Brown to Phase/Live

Should a ‘local’ plug need fitting to the wall end of the lead, ensure that a suitably qualified service

technician wires the plug correctly.

IMPORTANT: DO NOT POWER UP YOUR PREAMPLIFIER UNTIL YOU

HAVE CONNECTED YOUR INPUT/OUTPUTS CORRECTLY

FOR YOUR SYSTEM, (AS EXPLAINED IN THE NEXT

SECTION).

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