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ET 150/300/450

Description
ET450The ET150, 300 & 450 form the professional range of Current Thinkings' Easy T series of audio frequency induction loop (AFILS) amplifiers and are designed to provide studio quality sound in an AFILS system. The amplifiers have 3 inputs on XLR; 2 dedicated microphones and one microphone or line selectable using a rear panel switch. User selectable Phantom Powering is available for the microphone inputs, enabled via a rear panel switch. The inputs are individually mixed before passing to the compressor limiter, which prevents loop overload whilst compensating for varying microphone usage. All controls are recessed to prevent unauthorised access. Indication is provided for compression level, output current, loop status and power supply. A loop current monitor socket is provided to allow headphones to be used to monitor the actual loop current. An audio output (post compressor) is provided for recording, with a slave audio in to allow cascading. A loop OK voltage is available to illuminate a sign showing correct loop operation. The units are all 1u (44.5mm) high and a 19" rack mounting kit is available.

Choosing the right unit
All In order to remove the "magic" from loop amplifier specification, Current Thinking recommends loop amplifiers are specified thus; by maximum square area and by length of the shortest side. These areas relate to loops fitted at skirting board or ceiling (2.4m) height and provide even loop coverage. For example, the ET150 will cover a square room 12.25m per side (150m2), however the same amplifier will also cover a rectangular room 10m by 20m (200m2). In this example the ET150 is rated at 150m2 square area and 10m for the shortest side. The shortest side rating is valid for distances up to twice the shortest side, for example the ET450 is rated at 20m shortest side, so the other side of the rectangle can be a maximum of 40m (giving a coverage of 800m2). If the loop is above 2.4m in height, then 20% should be subtracted from the shortest length for every additional metre in height the loop is (to a maximum of 4m). These values do not take into account additional losses present in some building constructions, if you are in any doubt always lay a temporary loop. It is always wise to allow 20% spare capacity when specifying a loop amplifier, just to cover the unknown element.

At A Glance

• Up to 800m2 Coverage
• 3 Inputs on XLR
• Phantom Power
• Current Mode Output
• Loop Monitoring
• Soft Start
• Compressor
• Compression Meter
• Full Protection System
• Protected Mixer & Drive       Controls
• Power Indication
• High Peak

 

Literature
Instructions

 

CURRENT-THINKING ASSISTIVE LISTENING LTD, UNIT 30, WEARFIELD, SUNDERLAND ENTERPRISE PARK, SUNDERLAND, TYNE AND WEAR, UNITED KINGDOM, SR5 2TA. REGISTERED IN ENGLAND: 7626142

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