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アンプ AUDIOropa PRO LOOP DCCplusのPDF 取扱説明書をオンラインで閲覧またはダウンロードできます。AUDIOropa PRO LOOP DCCplus 14 ページ。 Loop amplifier

2.1 Cable cross section and wire diameter

The best audio quality can be reached if the DC (direct current) resistance of the induction loop is between 1

and 3 Ohm. The DC resistance depends on the wire diameter and the wire length. Please follow the steps

below:

1. Calculate the lenght of the loop wire. The wire lenght depends on the size of the induction loop.

2. Use the figure below to get the allowed wire diameter.

Example:

The wire lenght in a rectangular room with a width (W) of 10 m and a length (L) of 30 m is 80 m. According to

the figure below, the wire diameter must be between 0.77 and 1.34 mm. This corresponds to a cable-cross-

sectional area of 0.5 mm² and 1.5 mm².

You can use AWG 20 wire or a wire with a standard diameter of 1.00 mm (cable-cross-sectional area: 0.75 mm²).

Note

The inductive loop system works correct if the DC (direct current) resistance is between 0.5 ohm and

3 ohm.

2.2 Connecting the induction loop

Connect the ends of the loop wires to the terminals (28) on the rear of the amplifier.

OUT

COM

LOOP

18 English

Please note the following information

• The loop amplifier must be located outside of the loop.

• Twist the cable section between the amplifier and the loop (feed cable to

the loop) to prevent interference.

• Use a suitable measurement device (e.g. ohm meter) to make sure that

the loop doesn't have a short-to-ground (no damage on the insulation of

the loop wiring)!

• The distance from the loop level to the normal listening level should be

approx. 1.20 m to 2.00 m.