CLS1 wall mount perimeter hearing loop driver

CLS1 Induction Loop Driver

Part code: CLS001

The Ampetronic CLS1 is the first in a series of induction loop drivers aimed at the demands of the electrical and audio-visual contractor.

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Design / Specify

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Features

Quick and simple to install
Area coverage to >200m²
3 independent configurable inputs
12V DC output to power external accessories and third-party interfaces
Wall mounted
Metal Loss Correction
5 Year warranty
Cabling and controls behind tamper resistant cover
Free Technical support

Downloads

UP37202 CLS1 Datasheet

UP46402 CLS mounting template

UP17201-13-CLS1 Handbook

Specifications (PDF)

Click here to open datasheet in a new tab

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Design / Specify

CLS1 wall mount perimeter hearing loop driver

3.3A_RMS

Designed for simple discrete installation, the CLS1 is one of the most cost effective and capable solutions in its class. The amplifier is compact and designed specifically for wall mounting. All connections and controls are secured behind a tamper resistant, hinged, detachable cover. Combined with its small size, the range of mounting and cabling options ensure that installation is convenient and tidy in any environment. Input options are comprehensive, with three independent inputs for balanced microphone, balanced and unbalanced line, low impedance and 100V – line speaker systems.

Backed up by Ampetronic’s standard 5 year warranty and comprehensive support services, the CLS1 is truly fit and forget.

Applications include

Community Centres
Board rooms
Churches
Interview rooms
Meeting rooms
Classrooms

The CLS1 enclosure is designed for simple, permanent installation, with secure lid protecting connections and controls, while leaving operation indicators visible. The case is designed to make access simple, and to ensure the amplifier can be installed in the most constrained spaces.

Mounting

Designed for vertical panel mounting using 4 screws (6 holes provided). Template for screw placements provided. The CLS1 is compact enough to fit on a 1U rack tray with feet removed.

Enclosure access

Hinged lid, secured by 2 Phillips PH2 screws. Lid can be removed completely if required, for ease of access, or if there is no room to hinge the lid forwards.

Cable routing

Knock-outs (diameter 20mm) are provided for routing cables into the enclosure. 2 on the top edge, 4 on the rear face, 4 on the bottom edge, providing excellent installation flexibility.

Cable connections

All input cable connections are made with screw terminals mounted on one side of the PCB. Mains power connections are made to a chassis mounted screw terminal block. Loop connection is made to a screw terminal pair mounted on the PCB. Cable connections are illustrated on a detailed label on the case interior.

Indicators

3 LED indicators are visible with the case open or closed:

AGC Amber LED lit when input signal is activating the automatic gain control
Current Green LED lit when current is running in the loop
Power Green LED lit when the unit has power

Controls

Five controls are located to be accessed only with the lid open, all screwdriver adjustable.

Level controls for inputs 1, 2 and 3
Metal loss correction
Loop drive current

Quick and simple to install
Area coverage to >200m²
3 independent configurable inputs
12V DC output to power external accessories and third-party interfaces
Wall mounted
Metal Loss Correction
5 Year warranty
Cabling and controls behind tamper resistant cover
Free Technical support

Perimeter Loops – Area Coverage (maximum)

The CLS1 is designed for perimeter loop applications.

Room aspect ratio	1:1	2:1	3:1
Maximum area coverage m²	120	150	200

For any Induction Loop System, area coverage is dependent on several factors. Please check these assumptions and contact Ampetronic for advice if required:

The loop is 1-2m above or below the receiver height
There are no metal structures in the plane of the loop
There is sufficient voltage to drive the cable length – check table below.

Maximum Cable Length

The CLS1 is designed for SINGLE TURN loops for optimum audio quality:

Loops with DC resistance from 0.20Ω
Impedance up to a maximum of 1.8Ω

Maximum cable length is dependent on cable type and on the application.

Cable type	Maximum Cable Length (m)
	Normal Use	Transient Speech
1.0mm² copper	68	79
2.5mm² copper	93	118
4.0mm² copper	97	126
1.8mm² flat copper tape	120	136

CLS1 Specifications

INPUTS

Input 1	Balanced Mic, balanced or unbalanced line Input impedance 10kΩ per side Min level (MIC / Line -73dBu / -31dBu Max level (MIC / Line) -37dBu / +5dBu Phantom voltage MIC only +12V
Input 2	Balanced or unbalanced line, expansion port Input impedance 1MΩ per channel Min level -33dBu Max level +3dBu 12V DC to power external accessories and third-party interfaces (100mA max)
Input 3	Isolated 100V line or low impedance mono or stereo speaker Input impedance 100V Line / spkr 120kΩ / 7.8kΩ Min level 100V Line / spkr +14dBu / -9dBu Max level 100V Line / spkr >+47dBu / >+27dBu
AC power input supply	230V 30W 45-65Hz 120V option available (ETL Approved) Connected via chassis mounted screw terminal block
Input fuse – 230V Input fuse – 120V	T250mA T500mA

OUTPUTS

Drive voltage	>7.8Vrms – 11.0Vpk
Drive Current	Continuous 1kHz sine wave >3.5Arms 5.0Apk Short term peaks >5Arms 7Apk
Minimum Loop Resistance	0.2Ω
Maximum Loop Impedance	1.8Ω

THERMAL HEAT CHART

				Idle	1/6 peak Output Current (Speech)	1/3 peak Output Current (Pink noise)	Full Power
Driver	Channels	Current (A_RMS)	Load Resistance (Ohms)	AC In (W)	BTU	AC In (W)	BTU	AC In (W)	BTU	AC In (W)	BTU
CLS1	1	3.5	1.0	4	14	15	47	27	77	45	111
CLS2	1	4.9	1.0	5	17	19	58	35	91	63	131

AUDIO SYSTEM

Frequency response	80Hz to 6.3kHz ±3dB
Distortion	THD+N
Automatic Gain Control	(AGC) Optmised for speech. Dynamic range >36dB
Metal loss correction	(MLC) 0 to 3dB per octave frequency correction (1kHz remains constant). Control mounted on PCB.