Sonifex are showing a range of new products on booth number C3526 in Central Hall 1 at the NAB 2005 exhibition, to add to their successful current portfolio. Two new distribution amplifiers have been added to the Redbox range of audio interfaces. These will be on display together with the complete range of Redbox interfaces – distribution amplifiers, microphone amplifiers, headphone amplifiers, digital converters and matching amplifiers.
The RB-DA6G is a 6 way stereo distribution amplifier with output gain control. This 1U rack-mount unit is similar to the existing RB-DA6 distribution amplifier, with the addition of 12 individual normalising output gain controls allowing the output gains to be varied from -8dB to 18dB. The RB-DA6G has 1 stereo input and 6 stereo outputs and it can also be configured so that 1 mono input can be distributed to 12 outputs by use of a front panel, recessed switch.
The RB-DA4x5 is a 4 input, 4 x 5 output distribution amplifier/mixer in a 1U rack-mount. It has 4 balanced mono analogue audio inputs on female XLR and 4 groups of 5 outputs, 20 in total. Each output group has a five way front-panel DIP switch assigned to it which is used to select the input(s) to send to the output group. This enables each of the four inputs, or a 1kHz 0dBu tone, to be mixed to the output group.
The inputs and outputs are electronically balanced and can be wired unbalanced. Each input has adjustable gain using a preset potentiometer, providing a gain range of -8dB to +18dB. Each output is individually buffered so that a short circuit on one output won't affect the others. The output gain of each group can similarly be adjusted between -8dB and +18dB using preset potentiometers.
The DIP switch settings and gain controls are recessed beneath a front-mounting screw-on cover so that settings can not be accidentally altered, for secure applications. Four bright front-panel signal present LEDs show the levels of either the inputs or the output groups by pressing the AUDIO PRESENCE button. The LEDs will show green illumination from -12db through to 0db, amber from 0db through to +6db and red for inputs and outputs at +6db and over.
