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RDL RU-SX4A RACK-UP MODULE Audio switch

Stock code
58-437
Brand
RDL (Radio Design Labs)
Model number
  • RU-SX4A
RDL RU-SX4A RACK-UP MODULE Audio switch

RDL RACK-UP AUDIO CIRCUIT MODULES

A range of products from Radio Design Labs utilizing the time proven circuit designs used in the “Stick-On” products but in a slightly larger package. This allows for expanded features and convenient front panel mounting, up to three wide in a standard 19″ rack. All modules measure 43mm high, 150mm wide, and 51mm deep (unless stated otherwise). All rear panel connections are by barrier strip screw terminals, and total depth including connection strip is 64mm (unless stated otherwise). Each product may be used as a stand alone device or combined with other “Rack-Up” and “Stick-On” products as an integrated system. All “Rack-Up” products can operate from a single rail 24-33V DC supply with negative supply connected to ground. A variety of mounting hardware options are offered for total installation flexibility. A video distribution amplifier is also available, stock code 58-494.

RU-MX5ML Mic/Line Mixer

A 5-input mixer, four balanced mic/line channels, one balanced line channel, basic output level indicators, assignable 24 volt phantom power to selected mic channels, line and mic level balanced outputs, and mix buss input for expandability. Front panel volume controls with write-on legend area (removable).

Technical Specification:
Inputs: 4 selectable mic/line level, 1.2kohms balanced, 1 line level, 10kohms balanced
Line level output: +4dBV 150 ohms balanced
Mic level output: –45dBV 150 ohms balanced
Gain: Mic: Off to 65dB. Line: Off to 15dB
Frequency response: Mic: 80–40000Hz ±1.0dB. Line:20–35000Hz ±0.5dB
THD: <0.03% (Mic), <0.003% (Line)
Headroom: 20dB above ±4dBu output
Metering: 2 LED’s: –11 to +4dB (variable green intensity), +4dB to above (red peak reading).
Noise: <70dB below +4dBV output, all channels active, mic gain 50dB, line gain unity.
<90dB below +4dBV output, all channels off.
Power: 24–33V DC, 65mA
Dimensions: 150 × 122 × 43 (l × d × h) mm.

RU-MLA2 Dual Mic/Line Preamp

This unit features two microphone or line level input and output preamplifiers which may be used in stereo applications, or as two individual mono preamplifiers. Inputs and outputs are available as front panel XLR and are also available on the rear panel barrier block. Features include input gain adjustment, mic/line selector switches for input and output, input level LED indicators (dual LEDs), mic input high/low gain selection. The outputs are low impedance balanced, designed to drive short or long balanced lines. Inputs and outputs can be wired balanced or unbalanced. 24V phantom power can also be selected for microphone inputs.

Technical Specification:
Input connectors: XLR 3 pin female, rear barrier block
Input level: Mic: -48dBu to -3dBu (Low), -65dBu to -20 dBu (High)
Line: -15dBu to +28 dBu
Input impedance: Mic: 2k ohm balanced
Line: 10k ohm balanced
Output connectors: XLR 3 pin male, rear barrier block
Output level: Switchable on rear; Mic -46dBu or Line +4dBu
Output impedance: 150 ohms balanced to drive high or low impedance lines
Gain trim: Mic (Low gain): Off to 52dB
Mic (High gain): Off to 69dB
Line: Off to 20 dB
Frequency response: Mic: 80Hz to 50kHz (±0.75dB); @ 20Hz (integral high pass filter)
Line: 15Hz to 50kHz (±0.1dB)
THD+N: Mic: <0.1% (80Hz to 20kHz)
Line: <0.005%
CMRR: Mic: >60dB
Line: >50dB
Noise: Mic: –79dB below -45dBu output (ref. 40dB gain)
(20-20kHz) Mic: –70dB below -45dBu output (ref. 60dB gain)
Line: –85dB below +4dBu output
Crosstalk: Below noise floor (A to B; B to A)
Headroom: >20dB (above +4dBu Line output)
Supply input: 24–33V DC 80mA

RU-EQ2, RU-EQ3 Audio Tone Controls

Single-channel two and three-band equalisers. RU-EQ2 has two controls, for bass and treble. RU-RQ3 has, in addition, a mid-control “optimized to voice band adjustment”.

Technical Specification:
Input impedance: 100k ohm, balanced. May be used unbalanced
Output impedance: 150 ohm, balanced. May be used unbalanced
Indicators: Input or output overload indicator LED
Frequency response: 20Hz–22kHz, (EQ set flat; ±0.5dB), 600 ohm load
THD: <0.03%, (1kHz, ±4dBu, ref.: flat response)
CMRR: >60dB @100Hz
Noise: <–80dB below +4dBu
Supply input: 24–33V DC @25mA, ground referenced

RU-MLD4 Mic/Line DA

For applications where connectorised, 4-channel, balanced mic or line level audio distribution is needed. The input and output connections are provided on the front panel as XLR and the rear panel as full-sized detachable barrier blocks and can wired balanced or unbalanced. The outputs are 150 ohms balanced, designed to drive short or long balanced lines, with each output switchable between mic and line level. Both the front panel input XLR connector and the rear panel input terminals are active at all times and are switchable between mic (high and low gain) and line level. Gain trim is provided on a front panel control, along with dual-LED metering, thus accommodating a wide variety of dynamic or condenser microphones as well as line level setup. 24V phantom power can also be selected for the microphone mode input.

Technical Specification:
Input connectors: XLR 3 pin female, detachable rear barrier block
Input level: Switchable on rear;
Mic: -48dBu to -3dBu (Low), -65dBu to -20 dBu (High)
Line: -15dBu to +28 dBu
Input impedance: Mic: 2k ohm balanced
Line: 10k ohm balanced
Output connectors: XLR 3 pin male, detachable rear barrier block
Output level: Switchable on rear; Mic -46dBu or Line +4dBu
Output impedance: 150 ohms balanced to drive high or low impedance lines
Gain trim: Mic (Low gain): Off to 52dB
Mic (High gain): Off to 69dB
Line: Off to 20 dB
Frequency response: Mic: 80Hz to 50kHz (±0.75dB); @ 20Hz (integral high pass filter)
Line: 15Hz to 50kHz (±0.1dB)
THD+N: Mic: <0.1%
Line: <0.005%
CMRR: Mic: >60dB
Line: >50dB
Noise: Mic: –79dB below -45dBu output (ref. 40dB gain)
Mic: –70dB below -45dBu output (ref. 60dB gain)
Line: –85dB below +4dBu output
Headroom: >20dB (above +4dBu Line output)
Supply input: 24–33V DC 80mA

RU-UDA4 Unbalanced DA

This unit features two separate, isolated channels. The RU-UDA4 may be used in stereo applications, or as two individual mono distribution amplifiers. The input signals are buffered through output line drivers, providing 4 separate line-level unbalanced outputs for each of the two inputs. The RU-UDA4 performance is tailored around industry standard –10dBV input/output levels.

Technical Specification:
Input connectors: RCA (phono)
Input impedance 10k ohm unbalanced
Output connectors: RCA (phono), 4 per channel
Output impedance: 100 ohms unbalanced
Channels: 2 (left & right; may be used independently as 2 separate mono amplifiers)
Frequency response: 5Hz–50kHz (±0.5dB)
THD: <0.020%
Noise: <–90dB below –10dBV
Crosstalk: <–90dB @1kHz, <–80dB @10kHz
<–75dB @20kHz
Supply input: 24–33V DC 25mA

RU-ADA4D Dual DA

A 2 × 4 stereo or 1 × 8 mono audio distribution amplifier offering independent level adjustments for each of the balanced outputs, audio present and peak led indicators, and multiple isolated audio feeds. The inputs and outputs are connected on rear-panel detachable phoenix-style terminal blocks.

Technical Specification:
Inputs: 2, line level, 20k ohms unbalanced or 10k ohms unbalanced
Gain: Each output individually adjustable –9db to +6dB (rel. +4dBu, unbal)
–3db to +12dBu (rel. -10dBV, bal)
Frequency response: 10–35000kHz ±0.01dB
THD: <0.0025%
Headroom: >20dB above +4dBu input/output
Noise: <92dB below +4dBu output
Crosstalk: <-90 dB (20 Hz to 5 kHz); <-80 dB (5 kHz to 20 kHz)
CMRR: >90dB at 100Hz
Indicators: 2 LED per channel for audio present and peak
Power: 24–33V DC, 120mA

RU-SM16 Dual Audio Meter

A 2-channel horizontal LED array offering precision audio metering, precise left/right meter tracking, individual channel calibration controls, selectable peak or average metering for each channel, and peak hold on the upper three LED’s in either mode.

Technical Specification:
Inputs: 2 line level, 200k ohm balanced (accept balanced or unbalanced sources)
Input range: For 0dB reading, –26dBu to +14dBu
Frequency response: 20–50000Hz
Indicators: 16 LED’s per channel:
–20, –15, –12, –9, –6, –3, –2, –1, 0, +1.5, +3, +6,
+10, +14, +18 (+10, +14 and +18 are peak-hold
indicators only)
Meter Response: Each channel individually selectable peak or average
Peak Average
mode mode
Rise time (10% - 90%) 50µsec 130µsec
Rise time (0% - 100%) 60µsec 300µsec *
Fall time (90% - 10%) 65µsec 185µsec
Fall time (100% - 0%) 100µsec 300µsec *
(* VU characteristic)
Power: 24–33V DC, 250mA

RU-SX4A Studio Switch

This unit provides local or remote selection of one of four balanced line level bridging inputs to balanced low impedance output. Front panel momentary switch, active channel indication LED and level trimpot. In stereo applications, a second RU-SX4A may be wired as a slave.

Technical Specification:
Frequency response: 20–20000Hz ±0.5dB
Input level: –10 to 10dBV
Headroom: >16dB above +4dBu
THD: <0.05% (20–20000Hz)
Output impedance: 150 ohms
Supply: 24–33V DC 75mA

RU-PA518 Stereo Power Amplifier

This delivers up to 9W RMS per channel into 4 ohms, or up to 18W RMS bridged mono into 8 ohms (switch selectable, both inputs are mixed together). Rear panel switchable built-in peak limiter, front panel volume controls for both inputs.

Technical Specification:
Inputs: +4dBu nom. balanced on terminal block
-10dBV nom. unbalanced on RCA(phono)
Input impedance: 20k ohms balanced, 10k ohms unbalanced
Input signal levels: Minimum -6dBu balanced, -
20dBV unbalanced for rated power
Maximum +20dBu balanced, +6dBV unbalanced
Frequency response: 20Hz-40kHz ±1dB @5W RMS into 8 ohms stereo
25Hz-40kHz ±1dB @9W RMS into 4 ohms stereo
25Hz-30kHz ±1dB @18W RMS into 8 ohms bridged mono
THD + N: <0.05% below rated power (1kHz)
<0.1% below 18W RMS
Noise: < -85dB below rated output
CMRR: >55dB (50Hz-120Hz)
Crosstalk: <-60dB (stereo mode, 1kHz)
Output power: >5W RMS per channel into 8 ohms, stereo mode
>9W RMS per channel into 4 ohms, stereo mode
>18W RMS per channel into 8 ohms, bridged mono
Power: 24-33VDC 1500mA (RMS output),
1000mA (continuous voice or music)

RU-SC2 Serial Data Converter RS232/RS422

For applications when two RS232 devices requiring full duplex communication are to be connected at a long distance. Connection to the RS232 device is made on the front panel. The RS422 and power connections are made via screw terminals on the rear.
Two RU-SC2s may be connected, using the RS422 connections, at each end of 2 pair balanced twisted pair cable, thereby permitting serial communications over much greater distances than with conventional serial cables. Baud rate up to 115.2kbps, determined by RS232 devices. Two LED indicators, transmit and receive. Supply 24-33V DC 125mA.

RU-SQ6A Sequential Controller

A sequential switcher providing control voltages for up to 6 circuits. Each circuit has a 24V DC output for switching mains relays etc and an SPST dry contact for other control functions. Switch on and off delay is adjustable by front panel control. Controlled by either a front panel push-button or rear panel remote activation contact, the unit will also behave as if a power-up sequence is received on receipt of a supply voltage. It also powers off in sequence if that same supply is lost. LEDs indicate the 6 circuit states, if a power-up request is received, sequence complete status and whether the unit is in manual or remote control modes (switchable on the rear).

Technical Specification:
Control input: External closure <2.5mA @24V DC
Delay interval: 1–10 seconds adjustable per circuit
Indicators: Front panel LED’s indicate circuit ‘ON’ condition, UP request received, Sequence completed and front panel or remote control.
24V DC outputs: 50mA continuous (200mA surge)
Relay outputs – current: 2A max switching
– max voltage: 220V DC, 250V AC
– power: 60W max switching (125VA)
Supply: 24–33V DC 100mA

RU-VCA2/2D Digitally Controlled Amplifier

Mono and stereo (RU-VCA2D) digitally controlled amplifier with ramp generator output. When used with RLC1 or RLC2, push button “up” and “down” level control is provided as well as a return to preset function when both buttons are pressed simultaneously.

Technical Specification:
Audio input: 10k ohm balanced bridging or unbalanced
Frequency response: 10-30,000 Hz (+ or - 0.25dB)
THD: <0.002% (20-20,000 Hz)
Gain: Adjustable: 0dB to -96dB then “off”
Audio output: 150 ohms balanced (drives balanced or unbalanced line)
Ramp voltage: 0 to 10V DC (ground referenced)
Note: NOT intended for driving modules
Ramp rate: 3-10 secs adjustable (after 0.5 sec delay)
Supply: 24-33V DC 80mA

Mounting Accessories

See RDL Rack-Up Mounting Accessories for a range of brackets to fix the modules in standard equipment racks, to table tops and below shelves as well as cases to convert the modules into free-standing equipment.

Powering

Powering: All units require a 24V DC power supply; each has both screw terminals and coaxial socket for power input. A ‘universal’ supply is available, 57-401, with 24V 2A output, which requires an IEC cordset. See RDL Power Supplies for further information and a variety of mounting options. Note that all RDL modules with co-axial power input/output sockets use connectors with 2.5mm pins.