Sonifex Analogue Redbox Range from Eastern Electronics

The RB-DA6 is a high performance 6 way stereo distribution amplifier for splitting a source into a number of different outputs. The RB-DA6 has 1 stereo input and 6 stereo outputs. It can also be configured so that 1 mono input can be distributed to 12 outputs.

The XLR-3 inputs and outputs are electronically balanced and can be wired unbalanced. Each output is individually buffered so that a short circuit on one output will not affect the others. The outputs can be wired unbalanced.

The left and right input gain controls (normalising) are pre-set potentiometers accessible through the front panel. The 1-12 mono, 1-6 stereo switch is recessed on the front panel to prevent accidental knocking.

Sonifex RB-BL2 Unbalanced to Balanced Bi-Directional Converter at £179.99 inc. delivery & VAT

The RB-BL2 is a bi-directional stereo unit for interfacing domestic, or semi-pro unbalanced equipment to professional balanced line levels, and vice-versa.

All connections are on the rear panel. The two XLR-3 electronically balanced inputs have an impedance of 20k ohms bridging and are routed to two unbalanced RCA (phono) outputs with an output impedance of <50 ohms.

The two RCA unbalanced inputs have an impedance of 10k ohms and are routed to two balanced XLR-3 outputs with an output impedance of <50 ohms.

The output gain can be individually adjusted for left and right channels by using pre-set potentiometers accessible through the rear panel

Sonifex RB-BL4 Dual Stereo Bi-Directional Matching Amplifier at £279.99 inc. delivery & VAT

The RB-BL4 is a dual bi-directional stereo unit for interfacing domestic or semi-pro unbalanced equipment to professional balanced line levels, and vice versa.

The four XLR-3 electronically balanced inputs have an impedance of 20 kohms bridging and are routed to four unbalanced RCA (phono) outputs with an output impedance of <50 ohms.

The four RCA unbalanced inputs have an impedance of 20 kohms and are routed to four balanced XLR-3 outputs with an output impedance of <50 ohms.

All connections are on the rear panel. The output gain can be adjusted for left and right channels by using pre-set potentiometers accessible through the rear panel.

Sonifex RB-PMX4 10 Input, 4 Output Analogue Preset Mixer at £339.99 inc. delivery & VAT

The RB-PMX4 is a high performance 10 mono input to 4 mono output preset mixer. Each of the four outputs has a 10 way DIP switch associated with it to select which of the 10 inputs are routed to it. So, by altering the DIP switches, any of the input sources can be mixed to any of the outputs. The DIP switches are enclosed by a screw-on cover on the front panel so that the settings can not be accidentally changed for secure applications.

The RB-PMX4 has been designed for situations where a small mixer is needed for installations where it will be configured and then only altered occasionally, or never altered.

Uses for this product are numerous including a four bus mini-mixer, a 4 zone mixer for pubs and clubs and a quad stereo to mono converter to name a few.

The XLR-3 inputs and outputs are electronically balanced and can be wired unbalanced. Each output is individually buffered so that a short circuit on one will not affect the others. Each input has its own gain control which is a pre-set potentiometer accessible through the front panel. This provides gain adjustment of -8dB to 18dB. This is useful for normalising consumer and professional signals to give outputs of -15dBu and 0dBu respectively.

The RB-SD1 Silence Detection Unit is used to monitor an unattended stereo studio feed and in the event of the signal going 'quiet' after a given period the unit will switch through an alternative stereo audio signal. This signal could be a recorded message (e.g. normal service will be resumed. etc), a feed from a CD player or Minidisc machine, or an alternative recorded program. Controls are provided to start external equipment and to provide remote status indication. The RB-SD1 has a passive signal path so that it will still allow a signal to be transmitted in the event of a power failure.

It has two balanced stereo audio inputs that are user-defined as either the main source or auxiliary source, with the maximum input being -28dBu. Both sources are monitored for failure and each has a remote failure alarm. The main source is constantly monitored and in the event of it dropping below a pre-set level for a pre-determined amount of time, the unit will automatically switch through to the auxiliary signal.

The silence detect level is user definable and adjustable between -60dBu and -15dBu in 3dBu steps via a 16 position rotary switch on the rear panel. The silence interval can also be adjusted between 2 and 30 seconds in 2 second steps, or alternatively set to 2 minutes 5 seconds also via a 16 position rotary switch on the rear panel. The outputs use stereo professional balanced XLR connectors and the auxiliary input can have the gain increased to accept an unbalanced signal.

The unit can operate in two modes - auto or manual. In both modes the unit will automatically switch over to the auxiliary source after detecting silence. When the main signal is again detected the unit will either return to the main signal automatically or manually depending on the mode chosen. A lit LED indicates when the unit is in auto mode.

The RB-SD1 has a number of remote operational features. It can be remotely controlled with functions that mirror the following on-board controls : mode selection and return indication, restore method and input source selection and return indication. Remote outputs provide separate relay contact closures for failure of the main and auxiliary inputs.

The unit can be configured by dip-switch to alarm when either the left or right channel of the main input source fails, or if the whole stereo signal fails. Front panel LED indicators show individually left and right programme and alarm conditions for both the main and auxiliary inputs.

The RB-SD1 has been designed to have a passive signal path through the main input, so if power to the unit fails the signal input will still be routed through to the output. This is essential for applications such as installation at transmitter sites where a power failure to the unit should not prevent the audio input signal from being output to the transmitter.

The RB-SL2 is a stereo, or twin independent mono, VCA limiter for use in news-rooms and other locations where the correct level into recording equipment is required, but not necessarily under control of an engineer, for example, for overload protection. It can also be used as an inexpensive main output limiter for RSL's, hospital and student radio.

The XLR-3 electronically balanced inputs and outputs can be wired unbalanced to accept an output from domestic equipment. For each channel there is an input gain and a threshold level control. With the limit threshold set to maximum, the input through to output can be normalised using the input potentiometers. Once the unit is acting as a buffer with gain/attenuation, the limit threshold can be set, with the recovery adjusted for the application. The power LED indicates limiting by flashing.

A rear panel switch changes the unit from dual mono to stereo, when only the pre-sets for channel 1 (left) are active and apply to both channels.

The RB-LC3 is a triple output switching unit for controlling external mains indicators, primarily studio status lights for broadcasting applications, such as On-Air, Mic-Live and Rehearsal/Live lights. Each output can be individually controlled by one of three remote inputs (pulled high, or low), by a telephony input (when ringing, or off-hook, or both), or a combination of two inputs (to control two outputs, e.g. for Rehearsal/Live situations). The type of control is set using the 12 way DIP switch (4 switches for each output, allowing 16 different settings).

All connections are on the rear panel. The three IEC outputs are controlled by zero-cross point drivers. When an output is activated, the A.C. voltage level at that output will be equal to the mains input voltage used to power the unit.

External control of the switched mains outputs is via the 15 way D-type plug connector.

The telephone Line input and Handset output are via two RJ11-4 type connectors. The telephone connections are wired pin to pin from Line to Handset except when the remote Ring Mute control input is asserted. In this case the ring signal to the Handset is muted.

The status of the telephone Line is continually monitored so that Handset ringing and off-hook conditions can be indicated.

A pre-set potentiometer on the rear panel controls the flash rate of the output when the appropriate mode is selected. Neon indicators on each power socket show the status of the mains output

Terms; Cleared payment on delivery/collection only, standard delivery and VAT included. VAT Reg. No. 833 2083 51. E & O.E. The rest of the Redbox range is also available from us at excellent prices. Contact us for a quote.