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TL Audio M4 User Manual

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TL AUDIO M4 TUBE CONSOLE
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TL Audio M4 Specifications

General IconGeneral
BrandTL Audio
ModelM4
CategoryMusic Mixer
LanguageEnglish

Summary

M4 Introduction

M4 Mixer Technical Specification

Mic Input

Details balanced XLR socket, phantom power, gain range, and noise specifications.

Line Input

Specifies balanced TRS jack socket, impedance, gain range, and maximum input level.

Phase Rev

Explains the phase reversal function for mic and line inputs.

High Pass Filter

Describes the low cut filter at 90Hz for rumble reduction.

Frequency Response

Outlines the frequency response from line input to track output.

Distortion

States the typical distortion percentage for the unit.

Noise

Provides noise level specifications for line input to track output.

EQ

Details the 4-band EQ with shelving LF/HF and peaking LM/HM controls.

Insert Point

Describes balanced send/return TRS jacks and insert switches.

Track Output

Explains channel direct out and track 'Pre EQ' switch functionality.

Fader

Details the 100mm 'K' Series fader, mute, PFL, routing, and LED indicators.

L+R Outputs

Describes balanced mix busses, insertion points, master faders, and XLR outputs.

Aux Sends

Explains the 4 auxiliary sends, pre/post fader options, and level controls.

Talkback

Details the XLR talkback socket and routing switches.

Stereo Returns

Describes the two balanced stereo returns with faders and balance controls.

Monitoring

Explains monitor outputs, level control, PFL switching, and headphone output.

Power Supply

Details the external 2U rack mounting supply and power requirements.

Digital I/O

Discusses optional digital output modules for ADAT and SPDIF formats.

Dimensions

Provides console dimensions, including depth, height, and lengths for different channel counts.

Note: Distortion

Clarifies distortion measurement methodology, focusing on tube-generated second harmonic.

M4 Mixer Operation

Input Selection

Explains how to select between microphone and line inputs on each channel strip.

Input Gain Control

Guides on setting gain for optimal signal-to-noise ratio and headroom.

Line Input

Provides guidance on setting gain for line inputs, which are hotter sources.

Microphone Input

Details connecting microphones, setting gain, and using phantom power.

Phase Reverse

Explains the function and use of the phase reverse switch on inputs.

High Pass Filter

Describes the low cut filter's purpose in reducing rumble and pops.

30dB Pad

Explains the 30dB pad for reducing input gain with sensitive microphones.

Equalisation

Details the 4-band EQ, its bands, frequencies, and boost/cut controls.

Insertion Points

Explains how to use and bypass insert points pre or post EQ.

Aux Sends

Describes the 4 aux sends, pre/post fade options, and their typical uses.

Track Level Control

Explains setting direct output levels and the 'Pre EQ' option.

Pan Control

Details positioning audio image within the stereo field.

Mute Switch

Explains how to mute channels using the dedicated switch and LED indicators.

PFL Switch

Describes the Pre Fade Listen function for monitoring incoming sources.

Channel Fader

Explains the role of the 100mm channel fader in controlling signal level.

Drive and Peak LEDs

Explains the function of the yellow Drive and red Peak LEDs for signal monitoring.

Stereo Mix

Describes the two 100mm faders controlling the stereo mix output level.

Aux Masters

Details rotary master level controls and PFL switches for aux sends.

Effects Returns

Explains the two stereo effects returns, their controls, and usage.

Monitor and Headphone Level

Describes monitor outputs, level control, and headphone output functionality.

PFL Balance Level

Explains adjusting PFL signal level relative to the main stereo monitor level.

2-Track Return

Explains monitoring master machine output for confirmation during recording.

Loudspeaker Mute

Describes the switch for muting rear panel monitor output, useful with headphones.

Metering

Details VU meters and Peak LEDs for monitoring stereo output and PFL buss.

Digital Output Option

Discusses optional DO8 (ADAT) and DO2 (SPDIF) digital output cards.

Wordclock Input

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