Axel Oxygen 5 User Manual download pdf (Page 31)

STEREO MODULE

ENG

Axel Technology srl www.axeltechnology.com STEREO MODULE

13 STEREO MODULE

13.1 INTRODUCTION

Each STEREO module has dual switchable stereo line inputs with optional three-band

EQ. Input A comes factory preset for Line. Input B is also set for signals providing a

signal LINE level if not otherwise notified. Via jumper selection (ref to next Section), an

RIAA-equalised (grammophone) amplifier can be also fitted so that a turntable can be

connected directly to the input.

The selected A or B source is fed through a common GAIN potentiometer that provides

a variable 30dB range from -15 to +15dB gain to match the connected source to the

internal 0 dBu operating level.

The Equaliser (available as an option – Ref to Section Errore. L'origine riferimento

non è stata trovata.) comprises three sections. The upper control provides H.F.(treble)

boost and cut of +/-15dB at 13 kHz, and the lower control provides L.F. (bass) boost and

cut of +/-15dB at 100 Hz. The centre knob provides a cut/boost control of +/- 15dB at 5

kHz. Set the cut/boost control of each section to the centre-detented position when not

required.

The signal is then routed via a Balance control and two stereo routing switches to either

the main stereo programme (Master) or the stereo su/jointfilesconvert/401790/bgroup (Sub).

There is a red LED inside each switch which will illuminate accordingly.

The pre-fade listening. PFL button mode allows pre-fade listening (post pan-pot) of the

channel with the fader closed. When the PFL button is activated, the channel signal will

be connected to the PFL output and to the meters circuitry (see also METERBRIDGE

Chapter). Even when the channel is active, the PFL system is active. It always operates

in the SINGLE Mode (i.e. only one PFL is active at once). The PFL function can be

cancelled:

by using the PFL RESET button on the MASTER Module

by activating PFL on another module

A 9 pin D-Type plug remote connector provides the remote outputs (optocoupled or not)

for the Start and Stop functions, controlled by START button. The remote Start/Stop

operation can be jumper configured to be either momentary or latched (a feature that

may be required for some types of equipment).

ALPS N-type 90° ultra smooth 100 mm sliders are provided on series.

On request, to notify at order, ALPS K series and ALPS K/VCA series sliders can be

also fitted, the last ones controlling an internal high quality VCA circuitry. There is no

audio going through the VCA faders. VCA faders do not therefore suffer from such

severe noise and signal loss problems that conventional faders may have when wear

and tear causes the resistive surface to deteriorate. The benefit is longer fader life, as

the crackles and dropouts typical of the traditional audio faders are smoothed out.

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Axel Oxygen 5 User Manual Page 31