Plinius M7 User Manual

Thank you for buying a PLINIUS product!
This Preamplifier has been carefully designed and manufactured by hand and under
normal circumstances will maintain its present high level of performance for years to
come. Please read this manual fully before you attempt to use the M7 as it does
require some familiarisation before you add it to your music system.
We are proud to guarantee the correct operation of your M7 Preamplifier for a period
of 5 years from date of purchase.
CERTIFICATE OF MANUFACTURE
Serial Number :
Date of Manufacture :
Final Test :
Manufactured in New Zealand by:
AUDIBLE TECHNOLOGIES LIMITED.
© AUDIBLE TECHNOLOGIES LTD, 1996.

Plinius M7 Specifications

General

Signal-to-Noise Ratio	> 100 dB
Frequency Response	10Hz - 100kHz
Input Impedance	47k ohms
Output Impedance	0.1Ω
Inputs	XLR and RCA

Summary

Introduction to the Plinius M7 Preamplifier

Design Philosophy and Power Supply

Details the design continuation, emphasis on onboard power supply with transformer and regulation.

Phono Stage and High-Level Circuits

Explains the FET amplifier phono stage, active feedback EQ, and optimization for CD/other sources.

Component Quality and Switching

Highlights the use of quality ALPS potentiometers and solid-stage analogue switches for tape selection.

Controls and Operation

Volume and Balance Controls

Describes the high-tolerance volume control and the function of the balance control for channel gain adjustment.

Source and Record Selection

Explains how source selector chooses inputs and record selector allows recording without interrupting playback.

Mute Switch Functionality

Details the manual mute switch for interrupting output, advising against high volume in mute mode.

Installation and Connections

Preamplifier Warm-up and Placement

Recommends 24-hour warm-up for optimal sound and advises 50mm airflow clearance, avoiding stacking with other amps.

Input Connections

States all input connections are clearly marked and have a 47k Ohm impedance.

Tape Connections and Dubbing

Describes dubbing between two tape decks, including the 'tape lock' feature to prevent feedback.

Outputs and Specifications

Output Facilities

Notes provision for connection of 2 stereo amplifiers, useful for bi-amping.

Technical Specifications

Lists output levels (Main Out, Tape Out) and input parameters (impedance, overload, noise, distortion).

Servicing and Cleaning

Warranty and Servicing Procedure

Explains that removing covers doesn't void warranty, but advises caution due to voltages. Recommends dealer service.

Cleaning Instructions

Suggests using a damp cloth for cleaning dust and fingerprints from the M7's surface.