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RDL AV INTERFACES - TP Series - Headphone amplifiers

Radio Design Labs TP-HA1A is intended for use in conjunction with other modules from the RDL Format-A range, to feed a pair of headphones and provide a volume control to adjust the level. The amplifier is fed with both stereo audio and power via a standard, 4-pair, twisted pair cable such as those used in cabling buildings for IT and telecoms purposes.

The four-pair cable must be fed by a suitable RDL Format-A sender or senders, see below. The headphone amplifier has an RJ45 input socket, and a similar, parallel-connected, loop-out connector to feed additional RDL Format-A modules. Since the Format-A receivers have high impedance, bridging inputs, up to ten receiver modules may be connected to a single Format-A chain. All three signal pairs, A, B and C are connected through as is the fourth pair, which is used for power. The amplifier uses pairs B and C for the left and right audio signals, leaving pair A free for use by other Format-A modules.

All Format-A active modules require a source of power at 24V DC, with a capability to provide sufficient current for all the modules connected to the chain. The TP-HA1A is protected by an automatically resetting fuse.

The TP-HA1A is built in a metal case which mounts to a flat surface; the base plate has cut-outs to pass cables pre-wired with RJ45 plugs and apertures for mounting hardware. The top cover is removed for while mounting, then replaced and attached with a single screw.

The front panel is fitted with a single three-pole, 3.5mm jack socket and a rotary volume control.

Optional accessories: RDL Format-A sender module(s), power inserters with power supplies, see RDL POWER SUPPLIES, or any other Format-A module which supplies power on the chain in use.

Format-A

The RDL Format-A system is a proprietary scheme which links modular components together using cable types commonly used for communications and IT infrastructure, such as the Category 5 UTP cable used for Ethernet. Such a cable will have four pairs of wires, twisted together. The RDL scheme uses one pair to distribute power and three pairs, designated A, B and C, for up to three balanced, audio connections.

The audio connections over Format-A systems are analogue; for absolute clarity, please note that the fact that the type of cable used might otherwise be used for Ethernet does not imply in any way that the Format-A system uses any form of digital transmission between Format-A nodes, not Ethernet, not audio over IP, not DANTE or similar.

Note: Some RDL DANTE modules are available which have analogue inputs and outputs wired to the Format-A standard. The signals connected to those inputs and outputs must be analogue connections from other Format-A modules. The network connections to these modules will then convert the analogue Format-A signals to digital DANTE signals for transfer over the network.

For further information see RDL FORMAT-A SYSTEM

  Description Price (£) Add to basket
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RDL TP-HA1A HEADPHONE AMPLIFIER Stereo, Format-A RJ45 In & Thru, 3.5mm jack out, volume control   Stock code: 57-2431
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£114.80
RDL PS-24AX-EU POWER SUPPLY Universal, 24 volt, 500mA, Euro plug   Stock code: 57-404
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£23.17
RDL PS-24AX-UK POWER SUPPLY Universal, 24 volt, 500mA, UK plug   Stock code: 57-402
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£23.17
RDL PS-24KX-EU POWER SUPPLY Universal, 24 volt, 1 amp, Euro plug   Stock code: 57-405
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£29.98
RDL PS-24KX-UK POWER SUPPLY Universal, 24 volt, 1 amp, UK plug   Stock code: 57-403
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£29.98
RDL PS-24V3 POWER SUPPLY Universal, 24Volt, 3A   Stock code: 57-401
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£78.05
RDL PLUG-AX-EU SPARE PART EU Plug for PS-24AX power supply   Stock code: 57-406
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£1.57
RDL RC-PS5 RACKMOUNT TRAY For 5x PS-24V3, 1U   Stock code: 57-408
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£63.20
RDL DRA-35P DIN RAIL ADAPTER For 1x PS-24V3   Stock code: 58-555
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£9.07