CLS2 wall mount perimeter hearing loop driver

4.6A_RMS

The Ampetronic CLS2 is the second unit in a series of induction loop drivers aimed at the demands of the electrical and audio-visual contractor.

Designed for simple discreet installation, the CLS2 is one of the most cost effective and capable solutions in its class. The amplifier is compact, yet the most powerful unit available 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 extensive, with four independent inputs for balanced microphone, balanced and unbalanced line, low impedance and 100V – line speaker systems, plus priority alarm, doorbell or telephone connections.

Backed by Ampetronic’s standard 5 year warranty and comprehensive support services, the CLS2 is truly fit and forget.

Applications include

Community centres
Board rooms
Churches & places of worship
Interview rooms
Meeting rooms
Classrooms

The CLS2 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 CLS2 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, 3 and 4
Metal loss correction
Loop drive current

Product Code:
CLS002

Features
Specifications
Downloads

- Quick and simple to install
- Area coverage to >400m²
- Highest power loop driver in class
- 4 Independent configurable inputs
- Wall mounted
- Metal Loss Correction
- 5 Year warranty
- Cabling and controls behind tamper resistant cover
- 2 Priority alarm inputs
- Free Technical support

Perimeter Loops – Area Coverage (maximum)

The CLS2 is designed for perimeter loop applications.

Room aspect ratio 1:1 2:1 3:1
Maximum area coverage m² 250 310 400

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 CLS2 is designed for SINGLE TURN loops for optimum audio quality:

Loops with DC resistance from 0.2Ω
Impedance up to a maximum of 1.3Ω

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	49	57
2.5mm² copper	67	85
4.0mm² copper	70	91
1.8mm² flat copper tape	87	101

CLS2 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	As input 1 mic level Balanced mic Input impedance 10kΩ per side Min level (MIC / Line -73dBu / -31dBu Max level (MIC / Line) -37dBu / +5dBu Phantom voltage MIC only +12V
Input 3	Balanced or unbalanced line, expansion port Input impedance 1MΩ per channel Min level -33dBu Max level +3dBu
Input 4	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	>6.4Vrms – 9.0Vpk
Drive Current	Continuous 1kHz sine wave >4.6Arms 7.0Apk Short term peaks >7Arms 10Apk
Minimum Loop Resistance	0.2Ω
Maximum Loop Impedance	1.3Ω

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.