4.6ARMS
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.
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.
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.
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.
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.
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.
3 LED indicators are visible with the case open or closed:
Five controls are located to be accessed only with the lid open, all screwdriver adjustable.
Product Code:
CLS002
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 CLS2 is designed for SINGLE TURN loops for optimum audio quality:
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 |
| 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 |
| 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 |
| Idle | 1/6 peak Output Current (Speech) | 1/3 peak Output Current (Pink noise) | Full Power | ||||||||
| Driver | Channels | Current (ARMS) | 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 |
| 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. |
| Cooling | Natural convection |
| Environment | IP20, -10ºC to +40ºC |
| Dimensions | W, H, D: 200mm, 200mm, 44mm |
| Weight | 1.8kg |
| Mounting | Wall mounting, secured by 4 screws |
Nottingham, United Kingdom
XA88, CLS2-R1
