Description
BALANCED TO UNBALANCED CONVERTERS
These units are essentially 1:1 transformers wired to present an unbalanced pin configuration at one end and a balanced pin configuration at the other. In general they are symmetrical and can be used either way round; however, in certain circumstances they may not be suitable for connection to outputs of units. If it is required to feed 600 ohm land lines or other low impedance loads these units are not suitable for that application, see “Line Isolating Units”, stock code 49-243.
Low Level Types
These three versions utilise a high quality miniature transformer specially manufactured for Canford Audio and are intended for microphone or similar low level signals.
High Level Types
These eleven versions utilise a miniature Lundahl transformer and can be used with signals up to +18dBu.
Versions available
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Stock Code | Type | Level | Balanced end | Unbalanced end |
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49-221 | XJ | Low | XLR female | 6.35mm mono jack plug |
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49-222 | XFB | Low | XLR female | XLR male |
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49-223 | XMB | Low | XLR male | XLR female |
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49-271 | XJH | High | XLR female | 6.35mm mono jack plug |
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49-272 | XFBH | High | XLR female | XLR male |
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49-273 | XMBH | High | XLR male | XLR female |
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49-274 | PHMXFH | High | XLR female | Phono (RCA) male |
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49-275 | PHMXMH | High | XLR male | Phono (RCA) male |
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49-276 | PHFXFH | High | XLR female | Phono (RCA) female |
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49-277 | PHFXMH | High | XLR male | Phono (RCA) female |
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49-363 | MJPXFH | High | XLR female | 3.5mm jack plug |
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49-364 | MJPXMH | High | XLR male | 3.5mm jack plug |
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49-361 | BNCMXFH | High | XLR female | BNC male |
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49-362 | BNCMXMH | High | XLR male | BNC male |
Technical Specification:
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Frequency response: | 20Hz-20kHz +0.5dB @ -40dB 300 ohm source |
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| 10k ohm load (low level type) |
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| 40Hz-100kHz +0.5 dB @ 0dBu 600 ohm source |
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| 10k ohm load (high level type) |
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Insertion loss: | Typically 0.2dB for both types with conditions as for frequency response |
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Maximum level before saturation: | Low level type -15dBu (30Hz) |
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| High level type +10dBu (30Hz) |
Notes:
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1. Pin wiring at the unbalanced end of XLRs has pin 2 hot in accordance with European standard, pins 1 and 3 are linked and therefore great care should be exercised in case the user encounters any old type equipment (mainly American) with a pin 3 hot wiring convention. Damage could result.
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2. On types PHMXFH and PHMXMH, the phono male connector is not on the converter body, as the weight of the combined adapter and connected cable may seriously stress a panel mounted phono female. On these two types the phono male is connected via 150mm of cable.
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3. On types MJPXFH and MJPXMH, a 3.5mm 3-pole locking jack plug (43-251) is used, connected via 150mm of cable. This mates with both normal and screwlock sockets. The signal is connected to the tip, and the ground to the sleeve; the ring is not connected (although users who require this can modify the connector wiring)
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4. On types BNCMXFH and BNCMXMH, the BNC male connector is not on the converter body, as the weight of the combined adapter and connected cable may seriously stress a panel mounted BNC female. On these two types the BNC male is connected via 150mm of cable. These types are particularly suitable for interfacing balanced timecode lines to unbalanced machine inputs and outputs.