Page 32 bhi Ltd 22 Woolven Close Burgess Hill West Sussex RH15 9RR England email: sales@bhi-ltd.com www.bhi-ltd.
Note: No user serviceable parts inside. Warrany void if speaker opened. When listening using headphones, care must be taken when switching the noise cancellation off, as high volumes of noise will be present. Prolonged exposure to high sound levels may lead to hearing damage. bhi accept no responsibility to damage to hearing through incorrect operation of this equipment. 7.
6. bhi support Every noise-eliminating speaker comes with a 12 month guarantee against defective materials and workmanship. If you do have a problem then please refer to the troubleshooting section 4. If you have not resolved your problem then please contact us. Before you make your call please have the following to hand: Important Information Copyright This publication, including all photographs and illustrations is protected under international copyright laws, with all rights reserved.
Table of Contents 1 Overview 1.1 1.2 1.3 1.4 bhi Introduction Audio DSP Noise cancellation Unpacking 2 NES10-2 MK3 2.1 2.2 2.3 2.4 2.5 3. NES-5 3.1 3.2 3.3 3.4 Page 5 5 6 7 Controls Description Specification Connection Setup 8 9 11 11 13 Connections Description Specification Setup 15 16 17 17 4.Troubleshooting 18 5. Accessories 23 6. bhi Support 30 7.
DSPKR 10 Watt RMS DSP noise cancelling speaker The DSPKR is a new, quality, amplified DSP noise cancellating speaker from bhi that really lets you hear that signal! Works on all radio bands and is easy to install.
The speakers mount like any standard external speaker and are powered by any 12 – 24 vdc unregulated power source. You can use the optional bhi external power supply or in-vehicle adapter. The NES10-2 MK3 and NES-5 come as standard with a 2m audio lead terminated with a 3.5mm mono jack plug ready for immediate use. 1.3 Audio DSP Noise cancellation. The bhi DSP processes the incoming audio signal and then differentiates the speech from the noise.
Switch Box Order code: 1042 Switch Box Need to Connect more than one piece of equipment to your bhi Noise Eliminating Speaker or module? Switch box front view Switch box rear view Features: Allows 6 pieces of equipment to be connected to a Noise Eliminating Speaker, In-line Module or existing extension speaker 3 Inputs - loaded at 8 ohms 3 Un-loaded inputs (for low level signals) NEDSP1061 low level audio DSP modules The NEDSP1061 modules again feature the bhi noise reduction DSP.
Optional Extras Once set the controls do not normally require any further adjustments. 5. LED indicator. The LED illuminates red when power is applied and changes to green when the noise cancellation is active. LED colour Off Red Green Description Power off audio bypassed Power on noise cancellation off Power on noise cancellation on 6. Noise cancellation ON/OFF switch. This switch turns the noise cancellation on and off, and should be in the “OFF” position prior to using the speaker. 7.
What adjustments do I need to make during use? Apart from changing the filter level to suit the current listening conditions, once the NES10-2 MK3 is set to your personal settings no further adjustments should be necessary. Can the speakers be used with a switch mode power supply? We don’t recommend this, but some good quality switch mode power supplies do work ok.
Operators voice can be heard when transmitting. All bhi products operate correctly under normal working conditions. However if problems with feedback are experienced during transmisison then the following measures may help. 1. Reduce the sensitivity control (NES10-2 only) 2. Connect the speaker to a separate power supply (available from bhi - see section 5). 3. Ferrites Wind as many turns as possible around the ferrite Audio Lead 1” (25mm) ferrite ring 2.5 and operation 1.
Filter Level Attenuation 1 9dB 2 11dB 3 13dB 4 15dB 5 17dB 6 20dB 7 24dB 8 35dB Note: Remove the small grey filter select knob from the small red plastic accessories bag inside the NES10-2 MK3, and press fit into the switch body at the rear, making sure to line up the mark on the knob with the arrow on the switch. 6. Turn the radio equipment on and set the audio volume to your own personal taste, making sure that you are not over driving the speaker and causing distortion.
3.2 Description 3.4 1. The power-in socket allows the user to switch on the NES-5 by using the bhi power supply (optional extra) or a suitable 12 –24V dc power source (min 500mA), with a suitable 2.1mm power connector, centre pin positive (fused at 3A). 1. 2. 3.3 2 metre audio input lead terminated with a 3.5mm mono jack plug. This lead connects to the external speaker socket or earphone socket of your equipment. Page 16 - 20 dB - 20 dB - 5W rms max - 2.5W rms max - 3.5mm mono jack plug, 2m lead.
