DESKTOP MKII

Dramatically reduce noise and interference and hear more clearly!

Now includes the latest bhi DSP noise cancelling technology for even better receive audio!

The bhi DESKTOP MKII 10 Watt amplified DSP noise cancelling base station speaker has  removes noise and interference to leave clear speech. It works on all types of radio, transceivers, receivers, and SDR radios, giving a new listening experience.  The intuitive rotary controls make it very easy to use and set up to your own operating preferences.

Excellent audio quality
The DESKTOP MKII speaker comprises a 4" bass driver and a 1" tweeter unit with an amplified bhi DSP noise cancelling unit capable of producing up to 10 Watts audio (peak).

Easy to use controls
The DESKTOP MKII speaker is easy to use with rotary controls for volume on/off and filter level on the side of the speaker. 

Connections 
The DESKTOP MKII speaker has two 4mm screw terminal posts at the back for mono speaker level signals (4 or 8 ohm), and a stereo 3.5mm "Line Level" input socket suitable for use with SDR radio, Elecraft and FlexRadio products. There is also 3.5mm headphone socket on the side of the speaker for mono or stereo headphones.  12V DC Power is via the 2.1mm power socket (centre +ve).

Filter level control
Noise cancelling is switched on and off by pressing the filter level control.  Rotating this control allows you to change the filter level in real time to suit your current listening conditions. 

What’s in the box
The DESKTOP MKII speaker is supplied with a 2.1mm fused DC power lead with bare ends, a quality 1.2 metre audio cable with a moulded 3.5mm jack plug and  4mm banana plugs and a full user manual.  A 12V DC world-wide mains plug-in power supply PSU12-2A-WW is available as an optional extra.

Using your DESKTOP MKII speaker
Simply connect the power lead and audio lead to your DESKTOP MKII speaker and radio, switch on the power supply and you are ready to go, adjusting the volume and filter level controls on the side of the speaker to suit your own requirements.

Click here for the excellent QST review of the DESKTOP DSP speaker in the Mar '15 QST magazine

Features

• Quality 10 Watt amplified DSP noise cancelling base station speaker
• Latest bhi DSP noise cancelling technology
• 4" bass driver and 1" tweeter for excellent audio
• Works with most radios and receivers including SDR radios
• Simple to operate with intuitive rotary encoder controls
• Separate speaker level and line level audio inputs
• Audio input level overload feature
• Noise reduction 9 to 40 dB (8 levels)
• 3.5mm headphone socket (mono or stereo phones)

Specification:

DC Power
Connector type                                    2.1mm DC power jack (centre positive)
Input voltage                                        12 to 18 Volts DC
Input current                                         10mA standby
                                                            125mA active (no signal)
                                                             2.5A peak
Line Level Audio Input
Connector type                                     3.5mm Mono or Stereo line level
Input voltage range                              160mV to 1.6V pk-pk
Input impedance                                  10kΩ (±2kΩ) nominal

Speaker Level Audio Input
Connector type                                     2 x 4mm banana socket/screw binding posts (mono)
Input voltage range                              350mV to 3.5V pk-pk
Input impedance                                  8Ω (±2Ω) nominal
Input power rating                                1.5W max

Audio Output
Speaker output power                            10W peak (supply voltage of 18V)
Bandwidth                                             50Hz to 4.3kHz
Volume levels                                        16 levels (3dB steps)
Headphone output                                 3.5mm mono or stereo (8 to 64 Ohms)

DSP Noise Cancellation
Filter levels                                            8 levels + off
Noise reduction                                     9dB to 40dB
Tone reduction                                      4dB to 65dB

Indications
Status LED                                            Multicolour LED (red, amber, green)
Audio tones                                           Power-up, power-down, DSP filter level, volume and memory store
                                                              Input overload indication.
Controls
Power/Volume                                        Digital rotary encoder with push function
DSP level                                               Digital rotary encoder with push function

Physical
Weight                                                   1.90kg (shipping weight)
Dimensions                                             200(H) x 150(D) x 160(W)mm

Note: Elecraft K3 users:  To connect to the K3 using the speaker lead supplied you need to either make up an audio lead with a 3.5mm stereo plug (tip only connected) to a 3.5mm mono socket, or purchase one of our ALD-009 leads, or alternatively use a 3.5mm stereo plug to plug lead and connect from your K3 to the line in socket on the DESKTOP MKII speaker (ALD-007).

"Thank You Graham for your reply. I have in fact bought the DESKTOP model since I spoke to you from Martyn Lynch. It arrived today and I set it up to try it out. I am plagued by noise at my qth, so much so that I have seriously considered closing down the station. I cannot praise your speaker enough. It seems rather strange listening to speech in a way I have never heard it before. On top band we have a net on a Sunday morning. To be able to join in I have to go mobile to a spot away from the village. With winter on its way, I am going to enjoy the interference free contacts without having to go out. At 86yrs this is quite something. Again, thank you for making radio a pleasure again". Regards Peter 2E0DYM.

“I have sometimes been a little sceptical about DSP noise cancellation, but this really does reduce noise very effectively without any annoying and distracting DSP artefacts...”
RadCom Jan ‘14 review

Geoff Blore:
“Transformed the output sound of my TS-930S providing as clear audio to match current rigs.”

Mr. B Hiley:
“The DESKTOP speaker is great, audio is crisp and clear, brilliant!”

“I just wanted to thank you for your amazing Desktop (10W) DSP Speaker. I bought it from you @ the Kempton Park Rally - I tried it for the 1st time this Sunday on a noisy 40m band and was gobsmacked! Your unit made a fine job eliminating the crud picked up by the radio.  I now consider your noise eliminating speaker an essential bit of kit in my ham shack! Thank you very very much.” John G1WVN.