ST-501 Talkback System (Preliminary)

€ 950

The ARREL Audio ST-501 TALKBACK SYSTEM is an advanced talkback system for studio/dubbing applications. Its main characteristics are:

AUDIO ENGINEER MIC INPUTS: Three inputs : MIC1 on the back panel useful when the system is far from the user, this input is replicated on the fron panel on the left and rigth, MIC 2 input on the back panel, XLR connectors, gosselneck mic.

Gain control range 20 dB. The TALK BACK push button is on the front panel, and its is remoted on the 4 REMOTE connectors on the back panel (remote control accessory).

DIRECTOR MIC: Input on the XLR connector on the back panel. Gain control range 20 dB. The Director mic can be activated only by using the 4 REMOTE connectors on the back panel (remote control accessory).

MICS: Electret (cardioid) on a gosselneck base XLR connector.

TALK AMP: Balanced out (electronic balancing, servo amplifier). Out Level: + 4 dBu, Out impedance 600 ohm. The output can be unbalanced. Out connector: Jack TRS on the back panel.

CONTROL ROOM SPEAKERS: Automatic attenuation when the mics are activated. The attenuation factor can be controlled in the range -3dB to a -60 dB (complete attenuation) by a front panel control. IN/OUT connectors to the control room speakers: Jack TRS on the back panel. Balanced out line level, it can be unbalanced.

STUDIO SPEAKERS:Automatic attenuation when the mics are activated. The attenuation factor can be controlled in the range -3dB to a -60 dB (complete attenuation) by a front panel control. IN/OUT connectors to the studio speakers: Jack TRS on the back panel. Balanced out line level, it can be unbalanced. The studio speaker can be deactivated by selecting the MUTE control by the front panel push button. e MUTE can be remoted on the four back panel REMOTE connectors.

A relais is activated to control a MUTE external indication lamp.

REMOTE: Four remote connectors on the back panel to use 4 separate remote controls. The remote controlled functions are: TALK 1 (mic 1, LED 1 E 2) TALK 2 (mic 2 LED 1 E 2) MUTE (LED), RECORD (LED)

RECORD: Push button on the front panel. A relais is activated to control a RECORD external indication lamp. RECORD can be an be remoted on the four back panel REMOTE connectors.

CASE: Unita RACK 19” x 1U POWER SUPPLY: 220 V 50 Hz 30 W or 110 V 60 Hz

Power Supply Linear Regulator (Balanced C-Core Transformer)
Operating Voltage 220V 50 Hz / 110V 60 Hz switchable version
Power Consumption 20 W
Microphone Inputs 2: mic for the sound engineer and a mic input for the dubbing director
Microphone Gain 20 dB
Audio input Balanced line level input for L/R and studio (room) audio signals, Mics
Audio Output Electronically Balanced for talk, control room monitor, Studio Monitor,
Remote control Four remote controls can be used to remote the three functions RECORD, TALK, MUTE
Front Panel Controls Volume Control Room Monitor, Volume Studio Monitor, Volume Mic 1, Volume Mic 2, Mute, Record, Talk push buttons (LED), Power supply switch.
Front Panel Input Connectors Mic 1 XLR doubled for the connection of the mix on the left and on the right of the talk system
Rear Panel Input Connectors input mic 1 (XLR), input mic 2 (XLR), R/L mixer in jacks, room in jack, spare jack
Rear Panel Output Connectors 4 remote control TCP/IP connectors, MUTE display jack, RECORD display jack, balanced out talk speaker jack, R/L main speakers out, room speaker out
Bandwidth 5 - 200.000 Hz -1dB, perfect square wave up to 20 KHz
Distortion + Noise <0.003% ( typical 0.001 %).
AC mains IEC C13 16 A connector, AC mains cord with IEC Schuko 16A.
Construction 19" rack mount metal box
Dimensions 19"" 1 Rack Unit
Weight 1.5 kg.

    ST-501 Key-Technologies

  • LARGE BANDWIDTH (LBW)

    Large Bandwidth (LB) means a very fast transient response able to represent the original sound with the maximum temporal resolution. LB is required to improve the perception of a “real sound” and to represent the details of the original sound.
  • PERFECT SQUARE WAVE (PSW)

    Large bandwidth plus very low total harmonic distortion means a perfect square wave reproduction.
  • ULTRA LOW NOISE (ULN)

    Ultra Low Noise (ULN) active and passive components and ULN design techniques. This requirement is especially important when the audio bandwidth is large as in the case of ARREL Audio products.
  • VERY HIGH DYNAMIC RANGE (VHDR)

    Very High Dynamic Range (VHDR) means that the saturation probability of the output stages is extremely low. This is obtained by using special rail to rail circuits and by increasing the power supply voltage of the analog circuits.
  • ELECTROMECHANICAL FAULT TOLERANCE (EFT)

    Electromechanical tolerance means that electromechanical components are doubled in every situation in which maximum reliability it is important due to a frequent use (switches, push buttons, potentiometers).
  • THROUGH-HOLE TECHNOLOGY (THT)

    Through Hole technology means the maximum reliability in terms of thermal and mechanical stresses especially for connectors and electromechanical components.