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Speaker Line Monitoring

LS4808 / LS4816
8/ 16 Channel Speaker Line Surveillance

Amperes 8 Channel Speaker Line Surveillance- LS4808
Amperes 16 Channel Speaker Line Surveillance- LS4816

Impedance measurement method ; thus without the needs for end of line resistors

Basic and advance detection mode for more precise monitoring

RS485 and dry contact for external monitoring

LS4808 and LS4816 are all new speaker line monitoring unit, replacing the long running LS4600. Now available in 2 versions ; 8 and 16 channels types.

With their new processor and measurement algorithm, they are now able to perform tasks faster with better accuracy. Additional features included were trigger monitoring, which can be linked to timer for preset times activation.

Similar to its previous model, they provide reliable speaker circuit monitoring for ground leakage, short and open circuit using impedance measurement method, thus eliminating the use of blocking capacitors and end line resistors. 

  • 8 / 16 channel versions

  • Basic and advance level setting

  • Sensitivity setting 

  • Impedance measurement method ; end line resistors, block capacitors not required

  • Faulty circuit disconnection option

  • Built in impedance meter ; 10 to 10K Ohm

  • Fault alert bicolour LED with buzzer

  • Interval detection from 1m to 48 hrs

  • Remote detection activation 

  • Short burst signal for lesser interruption

  • Aux contact for 24V overriding during activation period

  • RS485 for remote monitoring

Technical Specifications

LS 4808 / 4816

Power requirement : Voltage       




Detection range  

Load measurement  


Pilot tone injection 

Tone level        

Detection period   


Detection interval



LCD display  

Audible alert  

Dry contact    

DC output   

Dimensions (mm) :  


Weight :


24V DC

3.8 / 4.9 W 

32 bit ARM processor

8 / 16 channel

10 to 10K Ohm

10W to 1000W 100V Line

+/- 3%

1 KHz

5V sine

0.5 sec

Auto / manual

Preset 1m to 48 hrs


User preset

Normal, Buzzer, Auto

2 x 16 charactors

Buzzer with off option


24V DC overriding

LS4808 : 482 X 44 X 180

LS4816 : 482 x 88 x 180

2.4 / 3.1 kg


Instruction Manual

ACAD Image 

Note :

Firmware Ver 1.1 ( Oct 19 ) Available 

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