DMH320 Dual muff & SMH310 Single muff
- New generation high performance headsets specifically designed for communications use
- Retains the renowned durability and comfort of the 200 series
- Very robust construction, made from unbreakable flexible composite material
- Similar construction to 200 series, spare parts also available
- Dual-chamber foam-filled earshells, larger than 200 series for wearing comfort
- High acoustic isolation on DMH320 for reduced ear fatigue
- Extended response ear loudspeakers
- Broadcast quality noise-cancelling dynamic microphone
- New boom design allows use with boom at left or right hand side
- Mic switched off by swinging boom upwards
- Boom can be bent into optimum position to suit the wearer
Technical Specification
| Nominal impedance: |
400 ohm each at 1kHz |
| Frequency response: |
40–14,400Hz |
| Sensitivity: |
94dB s.p.l. for 1mW |
| Distortion: |
Less than 0.5% |
| Max. rated power handling: |
0.5 watts |
| Microphone: |
Dynamic type, uni-directional, wired balanced |
| Nominal impedance: |
200 ohm at 1kHz |
| Frequency response: |
40–15,000Hz |
| Approx. weight: |
DMH320 365g |
| |
SMH310 240g |
| Cable: |
1.8m (balanced mic with separate left and right ear loudspeakers); |
|
27-320 uses an XLR 4-pin female cable connector |
|
27-323 uses a NC5FXX XLR 5-pin female cable connector |
|
27-310 uses an XLR 4-pin female cable connector |
For spare parts for 300 series headsets, see CANFORD AND TECPRO HEADPHONE AND HEADSET SPARE PARTS - 300 Series
DMH220 Dual muff & SMH210 Single muff
- Very robust construction with only two moving joints
- Hidden fixings hinder tampering whilst allowing easy repairs
- Full range of spare parts available
- Noise cancelling microphone on flexible steel-reinforced boom
- Steel core cable for extra strength
- Soft comfortable cushions
- Wide, smooth response for reduced listening fatigue
Technical Specification
| Nominal impedance: |
400 ohm each at 1kHz |
| Frequency response: |
20–20,000Hz |
| Sensitivity: |
94dB s.p.l. for 1mW |
| Distortion: |
Less than 0.5% |
| Max. rated power handling: |
0.5 watts |
| Microphone: |
Dynamic type, uni-directional |
| Nominal impedance: |
200 ohm at 1kHz |
| Frequency response: |
300–11,000Hz |
| Approx. weight: |
DMH220 250g |
| |
SMH210 210g |
| Cable: |
1.5m steel braced; |
|
27-220 uses an XLR 4-pin female cable connector |
|
27-223 uses a NC5FXX XLR 5-pin female cable connector |
|
27-210 uses an XLR 4-pin female cable connector |
For spare parts for 200 series headsets, see CANFORD AND TECPRO HEADSET SPARE PARTS - 200 series
DMH135 Dual muff
The DMH135 offers professional users maximum comfort during extended periods of comms work. This super light-weight headset is robust, and is compatible with Tecpro and most other intercom systems that use XLR 4 pin connectors for headset connection. Supple ear pads and swivel earcups provide a good acoustic seal, while the fully adjustable headband ensures a good fit, with low clamping force for reduced user fatigue.
Full features include:
- Lightweight, 'closed ear' 32 ohm headset
- Adjustable elastic headband
- Swivel earcups
- Soft comfortable cushions
- 600 ohm dynamic mic
- 1.5 metre straight cable, uses an XLR 4-pin female cable connector
Please note: The 27-135 DMH135 is suitable for use with Tecpro and other party line systems, BUT NOT suitable for use with digital intercom systems like Green-GO, due to crosstalk sensitivity.
For spare parts for 100 series headsets, see TECPRO HEADPHONE AND HEADSET SPARE PARTS - 100 Series
Wiring Conventions
Headset connectors
| XLR 4 pin |
|
| Pin 1 |
Microphone earth/screen |
| Pin 2 |
Microphone signal |
| Pin 3 |
Earphones earth/screen |
| Pin 4 |
Earphones signal |
| |
|
| XLR 5 pin |
(BP116 and BP117 only) |
| Pin 1 |
Microphone earth/screen |
| Pin 2 |
Microphone signal |
| Pin 3 |
Earphones earth/screen |
| Pin 4 |
Left earphone signal |
| Pin 5 |
Right earphone signal |