User manual TL AUDIO M4

[. . . ] TL AUDIO M4 TUBE CONSOLE USER MANUAL TL AUDIO M4 TUBE CONSOLE 1 M4 INTRODUCTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Mic Input: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Line Input:. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] Please see separate sheets for digital specifications. All consoles are 815mm (32") deep, plus at least at rear of console for PSU and audio connections, All consoles are 222mm (8. 75") high. Length of 16 channel console 694mm (27. 3"), Length of 24 channel console 950mm (37. 4"), Length of 32 channel console 1206mm (47. 5"). (Dimensions include wood trim). Dimensions: 100mm (4") Note: 0dB Distortion measured Line Input to Track Output at +4dBu input and gain over a bandwidth of 20Hz to 20KHz. The distortion is predominately tube generated second harmonic. Increasing the "Drive " level by applying more input gain progressively increases the distortion. The above figures are representative of typical production consoles, but are not guaranteed limits for any particular console. These specifications are subject to change without notice. 6 M4 MIXER OPERATION Input Selection You must ensure that the correct input connector, mic or line, is being used from the required source. You can select the type of input by pressing the 'LINE' switch at the top right of each channel strip in or out. In the "up' position the mic input is selected; depressing the 'LINE' switch selects the line input as the source. Note that you can have mic and line inputs connected at the same time but will only be able to select a single input at a time. Input Gain Control The gain control should be set to obtain the best signal to noise ratio, whilst preserving adequate headroom. Any changes in gain level should be gradual to avoid sudden overload or severe distortion. Extra care should be taken with higher level inputs, and high gain settings should be used sparingly to avoid an increase in the noise floor and the introduction of distortion. Line Input A typical line input will require less gain than a microphone signal as it is a 'hotter' source. You should have the gain set to a minimum when connecting a line input, then gradually increase it to achieve the required level. Microphone Input When connecting a microphone to the M4, start with the gain set to a minimum value and gradually increase until the sound source is just tickling 0dB on the meters when the source sound is at average output level. You can than choose how much you would like to drive the valves to produce the required sound. If Phantom power is needed, activate it before setting the gain by depressing the button marked '48V' at the back of the channel strip. Although the M4 provides 48V of phantom power, microphones requiring less than 48V can still be connected without any difficulties. CAUTION: Operation of the phantom power switch, or plugging a microphone in with the phantom power applied, may cause an audible click or thump in your loudspeakers. To avoid this happening, ensure that the channel fader and stereo master faders are set to a minimum before operating the switch or plugging in a microphone. Switching between mic and line with high input gain settings may also cause an audible thump if the level control is not turned down. 7 Phase Reverse The phase reverse switch, located to the bottom left of the gain control and labeled 'PHASE', is used to invert the phase of the input signal. It is active on both mic and line inputs. it boosts or cuts a section of the audio spectrum around its selected centre frequency only. ), peaking, sweepable high-mid (HM) and shelving high frequency (HF). [. . . ] A PFL switch allows each return to be auditioned in isolation. A mono signal can be fed to either of the returns by connecting it to the left hand return input only. This will automatically feed the mono signal equally to both left and right hand sides of the stereo buss simultaneously. An operating level switch is provided adjacent to the rear panel connector which selects whether each aux return functions at -10dB or +4dB, allowing easy interfacing with all types of equipment. [. . . ]