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23 Dezember 2024
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CANFORD LEVEL LIMITED HEADPHONES HD480 88dBA, wired BBC split-feed, with B-gauge plug

Artikelnummer
54-4015
Hersteller
Canford
Typennummer
  • HD480
GTIN
5056704747371
CANFORD LEVEL LIMITED HEADPHONES HD480 88dBA, wired BBC split-feed, with B-gauge plug

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CANFORD LEVEL LIMITED HEADPHONES HD480 88dBA, wired BBC split-feed, with B-gauge plugCANFORD LEVEL LIMITED HEADPHONES HD480 88dBA, wired BBC split-feed, with B-gauge plugCANFORD LEVEL LIMITED HEADPHONES HD480 88dBA, wired BBC split-feed, with B-gauge plugCANFORD LEVEL LIMITED HEADPHONES HD480 88dBA, wired BBC split-feed, with B-gauge plug

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CANFORD LEVEL LIMITED HEADPHONES

Canford has considerable experience in the design of headphone limiters and their use in the operational environment. Whilst virtually any headphone or headset can have a limiter fitted, using one of the seven types of standard multipurpose limiter circuits, this usually has to be in an in-line housing. By designing type-specific circuits for individual ear loudspeakers, these can be made small enough and appropriately shaped to enable them to be built into the earcup housing. Adding a limiter circuit to a headphone alters the input impedance.

For level limited headsets, see CANFORD LEVEL LIMITED HEADSETS.

Sennheiser (HD480, HD25, HD280 PRO)

HD480

The Sennheiser HD480 type headphone is an open back type headphone with 1700 ohm capsules. In order to distinguish these headphones from standard non-protected versions, they are distinctively marked on the ear shell. Limiting level is fixed at 85dBA (green trim ring), 88dBA (red trim ring) or 93dBA (grey or blue trim ring) (note 1). Standard connector options are available, and because the limiter is within the capsule, it is possible to use spare or replacement leads, as for standard versions.

All types have interwoven copper/Kevlar cables for extra strength. As with in-line limiters, each headphone is individually calibrated, and as each capsule has its own individually calibrated limiter, spare limited capsules are available.

Single-sided cables connect to the left earpiece, with a loop over the headband to the right earpiece; a fixing kit is supplied to hold the cable onto the headband. Note that in these versions, the earpieces are mounted onto the headband the opposite way up (connector at the top).

Frequency response: 20-20000Hz. Input impedance: 1200 ohms per earpiece. Sensitivity: 91dB for 1mW. Weight: 140g

Code Code Code Wiring Cable type Plug Spare cable
85dBA 88dBA 93dBA
- 54-4010 - - - No cable supplied -
- 54-4011 54-305 Stereo Dual-side 3.5mm 3-pole (stereo) plug 54-167
- 54-4012 54-304 Stereo Dual-side Neutrik 3-pole (stereo) A-gauge plug 54-044
- 54-4013 54-303 Stereo Dual-side Switchcraft B-gauge with black cover 54-043
- 54-4015 54-302 Split feed Dual-side Neutrik B-gauge with blue cover 54-042
- 54-4022 54-306 Stereo Single-side 3.5mm 3-pole moulded plug with 6.35mm adapter 54-046
- 54-4024 54-315 Stereo Single-side 4.4mm Bantam type jack moulded cover -
54-4132 54-4032 - Stereo Single-side, coiled 3.5mm 3-pole moulded plug 54-036
54-4133 54-4033 54-311 Stereo Single-side, coiled Neutrik 3-pole (stereo) A-gauge plug 54-065
- 54-4034 54-312 Stereo Single-side, coiled Neutrik 3-pole (stereo), right-angled, A-gauge plug, black -
54-4137 54-4037 - Stereo Single-side, coiled Neutrik B-gauge with black cover 54-070
- 54-4036 54-314 Split feed Single-side, coiled Neutrik B-gauge with blue cover 54-039
- 54-4035 54-313 Split feed Single-side, coiled Switchcraft B-gauge with black cover 54-038

HD25

Closed ear designs with extremely high external noise attenuation. Flip-away earcups, can be locked securely in place. High wearing comfort due to a splittable headband and leather-effect earpads. Single-sided, coiled 1.5m cable (3m extended), steel cored for reliability, supplied fitted with a straight 3.5mm 3-pole jack plus adapter to 6.35mm A-gauge 3-pole jack plug.

Impedance 70 ohms. Frequency response 16-22000 Hz, 200mW load rating.

Code Code Code Wiring Cable type Plug Spare cable
85dBA 88dBA 93dBA
- 54-4089 - Stereo Single-side, straight 3.5mm 3-pole moulded plug with 6.35mm adapter -
- 54-4085 - Stereo Single-side, coiled 3.5mm 3-pole moulded plug with 6.35mm adapter -
- - 54-326 Stereo Single-side, coiled 3.5mm 3-pole moulded plug with 6.35mm adapter -
Limited spare cables
Code Code Code Wiring Cable type Plug
85dBA 88dBA 93dBA
- 54-4097 54-328 Stereo Single-side, straight 3.5mm 3-pole moulded plug with 6.35mm adapter -
- 54-4096 54-327 Stereo Single-side, coiled 3.5mm 3-pole moulded plug with 6.35mm adapter -

HD280 PRO

Closed back circumaural headphones with high noise attenuation. Folding and rotating ear cups have been integrated on this updated version for easier transportation. Single-sided coiled cable with 3.5mm 3-pole jack, plus screw-on adapter to 6.35mm jack. Frequency response 8 to 25000Hz. SPL 113dB. Weight 285g. Nominal impedance 64 ohms. Supplied limited at 88dBA.

Beyerdynamic (DT100, DT250, DT770-Pro)

DT100

The closed back DT100 headphones have 400 ohm capsules. Units are available in the black shell version, with distinctive marking to distinguish them from standard non-protected versions. Limiting level is fixed at 93dBA (note 1). As with in-line limiters, each headphone is individually calibrated. Standard connector options are available, and because the limiter is within the earshell, it is possible to use spare or replacement leads, as for standard versions. Due to the method of construction, it is not possible for replacement ear loudspeakers to be user-fitted in these types, units requiring repair must be returned to Canford. For the same reason, replacement limited ear loudspeaker units are not available as spare parts.

The DT100 level-limited headphones are available as standard in five versions - four terminated and one without cable:

Code Code Code Wiring Cable type Plug Spare
85dBA 88dBA 93dBA cable
- - 54-330 - - No cable supplied -
- 54-4071 54-336 Stereo Single-side, straight 3.5mm 3-pole moulded plug with 6.35mm adapter 54-871
- 54-4072 54-334 Stereo Single-side, straight Neutrik stereo (A-gauge) plug 54-880
- - 54-333 Stereo Single-side, straight Switchcraft B-gauge plug (black cover) -
- - 54-332 Split feed Single-side, straight Neutrik B-gauge with blue cover 54-878

DT250

A professional monitoring headphone with great comfort for extended wearing. Supplied with 2.5m coiled cable, 3.5mm jack plug with 6.35mm adapter, or with Neutrik NC7MXX.

Code Code Code Wiring Cable type Plug Spare cable
85dBA 88dBA 93dBA
- 54-4067 - Stereo Single-side, coiled 3.5mm 3-pole moulded plug with 6.35mm adapter 54-7391
- 54-4121 - Stereo Single-side, coiled Neutrik 7-Pin XLR male connector 54-7394

DT770-Pro

Closed ear design, available with 80 or 250 ohm impedance, incorporating Beyerdynamic’s bass reflex system, combines articulate low end response with a lightweight diaphragm. Frequency response equalised to the diffuse sound field. Fitted with 3.5mm jack with 6.35mm adapter.

Code Code Code Impedance Wiring Cable type Plug Spare cable
85dBA 88dBA 93dBA  
- - 54-339 250 ohm Stereo Single-side, straight 3.5mm 3-pole moulded plug with 6.35mm adapter 54-7398
- 54-4061 - 250 ohm Stereo Single-side, straight 3.5mm 3-pole moulded plug with 6.35mm adapter 54-7398
- 54-4060 - 250 ohm Stereo Single-side, straight Neutrik 5-Pin XLR male, right-angled connector -
- 54-4075 - 80 ohm Stereo Single-side, straight 3.5mm 3-pole moulded plug with 6.35mm adapter 54-7398

Canford (DMH205, DMH620)

DMH205

Heavy duty ‘closed ear’ general purpose headphones. Very robust construction, hidden fixings hinder tampering whilst allowing easy repairs. 2 metre cable with steel conductors, fitted with robust Neutrik 3 pole A-gauge, B-gauge plug or Canare 3.5mm plug. Impedance 2 x 400 ohms.

Code Code Code Wiring Cable type Plug Spare cable
85dBA 88dBA 93dBA
- 54-4040 - Stereo Single-side, straight 3.5mm 3-pole Nickel jack plug -
- 54-4041 - Stereo Single-side, straight Neutrik stereo (A-gauge) plug -
- 54-4042 - Stereo Single-side, straight Neutrik B-gauge plug (black cover) -
- - 54-209 Stereo Single-side, straight Neutrik stereo (A-gauge) plug -

DMH620

Lightweight, 'closed ear' general purpose 32 ohm headphones. Adjustable elastic headband and swivel earcups. Single-sided, 1.5 metre coiled cable, fitted with 3.5mm jack plug. Supplied limited at 88dBA. Spare parts available.

Sony (MDR-7506)

MDR-7506

Rugged closed ear design and wide frequency response for reliability and accuracy (note 2). 3 metre coiled OFC cable, fitted with gold 3.5mm 3-pole mini jack with 6.35mm 3-pole jack adapter.

Code Code Code Wiring Cable type Plug Spare cable
85dBA 88dBA 93dBA
- 54-4051 - Stereo Single-side, coiled 3.5mm 3-pole moulded plug with 6.35mm adapter 54-4671
- - 54-437 Stereo Single-side, coiled 3.5mm 3-pole moulded plug with 6.35mm adapter 54-4671

Shure (SRH440, SRH840)

SRH440

Closed-back, circumaural headphones designed for recording and programme monitoring, with 3 metre coiled cable. Available wired stereo with 3.5mm plug and 6.35mm A-gauge adapter or Neutrik B-gauge plug with black cover.

Code Code Code Wiring Cable type Plug Spare cable
85dBA 88dBA 93dBA
- 54-4055 - Stereo Single-side, coiled 3.5mm 3-pole moulded plug with 6.35mm adapter 54-566
- 54-4056 - Stereo Single-side, coiled Neutrik B-gauge plug (black cover) -
- 54-4057 - Split feed Single-side, coiled Neutrik B-gauge plug (blue cover) -

SRH840

Closed-back, circumaural headphones designed for recording and programme monitoring, with 3 metre coiled cable. Available wired stereo with 3.5mm plug and 6.35mm A-gauge adapter

Notes

1) The quoted limit level of 93dBA, 88dBA and 85dBA is for measurement using dummy head (or mannequin) systems. For measurements using flat plate calibrators the level will differ. Health and Safety authorities are more inclined to use the dummy head type measurement.
2) Due to the enclosed circuitry, the sensitivity and presented impedance of these headphones is different from standard versions.

Spares

Certain ear loudspeakers and cables are listed as spares in a group. For further information, see CANFORD LEVEL LIMITED HEADPHONES AND HEADSETS Spare parts.