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DSPKR 10 Watt RMS Amplified DSP noise cancelling Speaker
1. Packing List - The DSPKR is shipped with the following:
•DSPKR noise cancelling speaker
•Integral black audio lead with 3.5mm mono plug attached.
•Speaker mounting bracket
•Fused DC power lead 1030-FPL (Red cable +ve, Black/red cable –ve)
•Mounting screws
•Operating manual & customer feedback card
2. Introduction
The bhi DSPKR amplified DSP noise cancelling speaker greatly improves the clarity and
intelligibility of speech in radio and voice communication systems. It is suitable for use in
many applications where high background noise and interference mean that you cannot
clearly hear what is being said. The speaker will enable the user to listen and concentrate
“stress-free”. Suitable applications where the speakers will be of great benefit are:
Amateur radio, CB radio, two-way radio, HF radio, marine communications, scanners, taxi
base stations and especially mobile installations. The speaker incorporates unique DSP
technology to remove unwanted background noise and interference from speech and has
up to 7 DSP filter levels allowing the user to optimise for their level of noise and
interference. The speaker simply connects into the extension speaker socket or
headphone socket of your audio equipment.
The DSPKR comprises a wide frequency range 4” speaker and an audio amplifier capable
of producing up to 10-Watts RMS audio power, with built in bhi DSP noise cancelling filter.
The unit requires an audio input signal of between 80 and 500mV level and a DC supply of
between 10 and 16 Volts (2A). The unit is supplied with an attached black 2 metre audio
cable with a moulded 3.5mm jack plug for the audio input, and a red/black 2.1mm fused
DC power lead with bare ends. A 3.5mm mono auxiliary output socket is provided to allow
the speaker to be used with headphones or to drive another loudspeaker. A 12V DC
power supply PSU12-1A is available as an optional extra (UK customers).
Note: The DSPKR is designed for speech signals and is not really suitable for music.
3. Installation
The speaker comes with a mounting bracket that enables the speaker to be used free-
standing on a desk or secured into vehicles using the self tapping screws provided.
When installing, ensure that adequate access can be gained to allow operation of the
Function button. Furthermore, when installing in vehicles, ensure that the unit is not in
direct sunlight or in a hot area.
Make sure that the DSPKR 3.5mm plug lead and the fused DC power lead are routed
away from sources of electronic interference or RF cables.
For best results try to use a separate power supply to power the speaker, and in a vehicle,
power directly from the vehicle battery as this will minimise the chance of alternator whine
and other electronic interference occurring.
