The Ampetronic CLS1 is the first in a series of induction loop drivers aimed at the demands of the electrical and audio-visual contractor.
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.
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.
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.
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.
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 CLS1 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|
|1.8mm2 flat copper tape||120||136|
|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
|Input 3||Isolated 100V line or low impedance mono or|
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
|Drive voltage||>6.4Vrms – 9.0Vpk|
|Drive Current||Continuous 1kHz sine wave >3.3Arms 5.0Apk|
Short term peaks >5Arms 7Apk
|Minimum Loop Resistance||0.2Ω|
|Maximum Loop Impedance||1.5Ω|
|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|
|Frequency response||80Hz to 6.3kHz ±3dB|
|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.|
|Environment||IP20, -10ºC to +40ºC|
|Dimensions||W, H, D: 200mm, 200mm, 44mm|
|Mounting||Wall mounting, secured by 4 screws|