TX-PA40D | 40 W STEREO AUDIO POWER AMPLIFIER WITH POWER SUPPLY - INCLUDES NORTH AMERICAN POWER CORD
TX-PA40D
40 W STEREO AUDIO POWER AMPLIFIER WITH POWER SUPPLY - INCLUDES NORTH AMERICAN POWER CORD
TX-PA40D
40 W STEREO AUDIO POWER AMPLIFIER WITH POWER SUPPLY - INCLUDES NORTH AMERICAN POWER CORD
- UM : EA
- Estimated Weight: 1.6
The
TX-PA40D is the ideal choice in many applications where a high quality,
high-efficiency utility amplifier is needed to drive a pair of 4 O or 8 O
speakers. It is specifically suited to fixed-gain amplification applications
where gain is controlled by other equipment. Examples include projectors with
variable audio outputs used in classrooms, boardrooms and video conferencing.
The TX-PA40D features two unbalanced line level inputs on high-reliability gold
plated phono (RCA) jacks. A front-panel recessed gain control trimmer permits
setting the desired amplifier output level for each channel. The gain range
accommodates the range of typical unbalanced audio signal levels. Each of the
two TX-PA40D outputs will drive a 4 O or 8 O speaker or multiple speakers
connected to present a 4 O or 8 O load to the amplifier. The output impedance
is switch-selectable on the front panel of the module.
A front-panel switch is provided to sum the audio inputs to mono. In the STEREO mode,
the TX-PA40D independently amplifies each audio channel, left (L) and
right (R). If speaker placement in the specified installation is
incompatible with stereophonic amplification, the INPUT MODE switch
may be set to SUMMED MONO.
The TX-PA40D includes a stereo analog compressor/limiter for audio fidelity
noticeably superior to conventional class D amplifiers with digital limiting.
The input GAIN settings determine whether the limiter alone is
used for clipping suppression, or if the full compressor/limiter will be used
to substantially increase the average output power beyond that of a standard 40
W amplifier. A red front-panel LED flashes when the limiter is preventing
output 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 LED remains dimly lit between peak flashes. The audio
is compressed according to three dynamic time constants providing aural
transparency while maintaining clean, unclipped 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.
A blue POWER LED illuminates when the TX-PA40D is powered from
its external 24 Vdc power supply. The module is equipped with both thermal and
output short-circuit protection. The high-efficiency Class D output stages
produce minimal heat for all levels of expected voice or music modulation.
Continuous full-power operation with audio tones will not damage the amplifier,
but is not recommended.
Wherever an ultra-compact, high quality, high efficiency audio power amplifier
is needed to provide reliability and unsurpassed versatility, the TX-PA40D is
the ideal choice. Use the TX-PA40D individually, or combine it with other RDL
products as part of a complete audio/video system.