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1 March 2025

RDL TX-PA40D POWER AMPLIFIER 2x 20W/8, 2x 15W/4, with PS-24V3 power supply

Stock code
57-2411
Brand
RDL (Radio Design Labs)
Model number
  • TX-PA40D
RDL TX-PA40D POWER AMPLIFIER 2x 20W/8, 2x 15W/4, with PS-24V3 power supply
RDL TX-PA40D POWER AMPLIFIER 2x 20W/8, 2x 15W/4, with PS-24V3 power supply

Order

VAT / Delivery
$451.08
each (ex. VAT)
Ordered on demand, available in 3‑4 weeks. Need it sooner? Call us

RDL AV INTERFACES - TX Series

RDL TX series is a range of small enclosed “black boxes” offering a simple, high quality solution to temporary or permanent interfacing, communication and distribution problems especially in theatre, PA and broadcast.

All TX series modules measure 76 x 30 x 36mm. They are the same 'family' as the Stick-on series, but are devices where the ST-type housing, with screw terminal connections, is unsuitable, eg. where the use of connectors is required.

Included accessories: All models are supplied with a data sheet with installation details.

AUDIO CONVERTERS

AUDIO TRANSFORMERS

VIDEO SWITCHES

CONTROLLED RELAYS

MIXERS

AMPLIFIERS


TX-1W Music-on-hold Amplifier

For use where a PABX or key telephone system needs to be fed with music, speech, or a mixture of both. When a call is placed “on hold”, the audio quality perceived is affected by the caller’s own telephone earpiece, as well as the line quality and system design. Due to these variations, conventional audio amplifiers used as “music-on-hold” drivers often produce annoying artefacts to the caller. Attempts to reduce listener fatigue through HF roll-off alone tends to produce a muffled, tired sound. The TX-1W features a response specifically characterised to match the broadest variations in telephone audio distribution, producing a lively, crisp, interesting sound. Input on 6.35mm mono jack (–10dBv nom.), adjustable audio level –10dB to +25dB, unbalanced 1 watt output on 6.35mm mono jack, transformer balanced 600R output on screw terminals. Supply: single 150mA.


TX-PA40D Power Amplifier

This is a 'high-efficiency utility amplifier' which drives a pair of 4 or 8 ohm speakers. It is suited to applications where gain is controlled by other equipment, such as projectors with variable audio outputs used in classrooms, boardrooms and video conferencing. A stereo analogue compressor/limiter is included for 'audio fidelity noticeably superior to conventional class D amplifiers with digital limiting'. This can be adjusted so that the limiter alone is used for clipping suppression, or the full compressor/limiter can be used to substantially increase the average output power beyond that of a standard 40W amplifier.

When the limiter is clipping, normal audio level signals 'remain unaffected by the compressor thereby preserving audio dynamics'. If the input level is increased so the compressor is active, the audio is compressed according to three dynamic time constants 'providing aural transparency while maintaining clean, un-clipped, amplified audio for input overloads of up to 20 dB'. The TX-PA40D, with compression, is capable of 'producing average audio output levels and clarity normally expected from stereo amplifiers with a much higher output power rating'.

The front panel has two gold-plated RCA (phono), unbalanced input sockets, each with an associated screw-driver operated, gain-trim control. An input-mode slide switch, selects summed mono mode or stereo and another switch selects 8 or 4 ohms output loading. LEDs shows operation of the compressor-limiter and the presence of power. A detachable terminal block is provided for connection of the two loudspeaker feeds and power from the included inline power supply, which has an IEC AC power input. The module is equipped with both thermal and output short-circuit protection.

Inputs: -10dBV nominal, unbalanced, 10k ohms; -18dBV minimum to cross compressor threshold; +15dBV maximum. Response (note 1): 20Hz - 20kHz, +/- 1dB, 4 or 8 ohms. Distortion (note 1): 0.1% THD+N, 1kHz, 1W , 4 or 8 ohms; 1% ,50Hz - 20kHz, 8 ohms. Noise: 75dB below 20W RMS. Crosstalk: Better than 60dB, 1kHz, no compression. Compressor threshold: Nominally 2 dB below rated output, automatically adjusting attack and release times. Outputs: 20W RMS, 8 ohms, per channel; 15W RMS, 4ohms, per channel. Note 1: Measured at compressor threshold level equalling 12W RMS (8 Ohms) output power. Ambient temperature: 0- 40 degrees C; 20 degrees C recommended. Power source: 24V DC from included power supply, 100-240V C, 50-60Hz, 1.5A. Dimensions: 76 x 48 x 41mm.


TX-VLA1 Video Line Amplifier

A single channel video line amplifier with adjustable gain (unity to +5dB) and EQ (flat to +7 at 5MHz) to equalise cable runs up to 600 m. Input and outputs on BNC connectors.
Supply 12-33V DC or 12-24V AC, 30mA.

FORMAT-A SENDERS

FORMAT-A RECEIVERS

FORMAT-A COMBINERS

FORMAT-A POWER INSERTERS