amperes electronics
Professional Public Address (PA) System Manufacturer
LS4816
16 Ch Speaker Line Surveillance
LS4816 is an 16-channel speaker line monitoring units that detects faults such as ground leakage, short circuits, and open circuits using advanced impedance measurement.
Available in 8 (LS4808) or 16 channels (LS4816)
Reduce PA disruption with short test signals
Detection time adjustable from 1 min to 48 hrs
Bi-colour LEDs for fault indication
Introduction
LS4816 and LS4808 are next-generation speaker line monitoring units, available in 8-channel and 16-channel models, they provide fast and accurate detection of faults such as ground leakage, short circuits, and open circuits using advanced impedance measurement. This eliminates the need for end-of-line resistors or blocking capacitors and allows flexible circuit branching.
With improved processing and detection accuracy, they offer Basic and Advanced monitoring modes for flexible setup. A trigger function enables timed activation when connected to a timer. Fully compliant with EN54, they are ideal for reliable monitoring in PA and EVAC systems.
Packing information
Carton size: 555 (L) x 295 (W) x 165 (H) mm
Gross weight: 4.0 kg
1 unit per carton
Introduction
LS4816 and LS4808 are next-generation speaker line monitoring units, available in 8-channel and 16-channel models, they provide fast and accurate detection of faults such as ground leakage, short circuits, and open circuits using advanced impedance measurement. This eliminates the need for end-of-line resistors or blocking capacitors and allows flexible circuit branching.
With improved processing and detection accuracy, they offer Basic and Advanced monitoring modes for flexible setup. A trigger function enables timed activation when connected to a timer. Fully compliant with EN54, they are ideal for reliable monitoring in PA and EVAC systems.
Packing information
Carton size: 555 (L) x 295 (W) x 165 (H) mm
Gross weight: 4.0 kg
1 unit per carton
LS4816
Power Requirements
Operating voltage
24V DC via PS9400
Power consumption
4.9W
Connectivity
Capacity channel
16 channels
Impedance detection range
10 to 10k Ohm
Power measurement range
10 to 1000W 100V line
Measurement accuracy
± 5% within range
Pilot tone injection frequency
1 kHz
Pilot tone signal output level
5V sine
Monitor triggering
Auto / remote trigger
Transmitted detection period
0.5 seconds per channel (max)
Detection interval
User preset from 1 min to 48 hours
Sensitivity setting
User preset at each channel
LED indicators
Normal, Fault, Buzzer, Auto run
Display LCD
2 x 16 characters with back light
Audible output signal
Continuous buzzer with OFF option
Dry contact setting
3A
DC output in detection mode
24V DC for individual channel
Data interface and baud rate
RS485, 19.2 kbps
Physical Specifications
Dimensions (W x H x D)
482 x 88 x 180 mm
Net weight
3.25 kg
Note: The specification parameters may be changed, added, or omitted without prior notice. Last updated on 21 Apr 2026.
Available in 8-channel (LS4808) or 16-channel (LS4816) models
Detects ground leakage, short circuits, and open circuits using impedance measurement
Supports speaker circuit branching without end-of-line resistors or blocking capacitors
Basic and Advanced detection modes for flexible setup
Uses short test signals to minimize disruption to PA operation
Supports manual or automatic testing via external triggers
Adjustable detection intervals from 1 minute to 48 hours
Optional fault isolation for improved system safety
Bi-color LED indicators for clear fault status display
24V DC AUX output to override volume controls during testing
RS485 port for remote monitoring and testing via PMX III and iPX5500
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International recognitions
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Sales Office (Malaysia)
70, Jalan Industri PBP 3,
Taman Perindustrian Pusat Bandar Puchong,
47100 Puchong, Selangor, Malaysia.
Tel: +603-5882 7757 / 7758
Production Factory (Malaysia)
2, Jalan Meranti Puchong D25@Meranti Puchong
47120 Puchong, Selangor, Malaysia
Export Sales Office (Singapore)
Amperes Asia Pte Ltd
(Co Reg: 201102253E)
1, North Bridge Road, #13-03, High Street Centre, Singapore 179094
Amperes Electronics Sdn Bhd
SSM Registration No: 200001006420 (509025-X)
Your Trusted PA System Manufacturer since 1999
Sales Office (Malaysia)
70, Jalan Industri PBP 3,
Taman Industri Pusat Bandar Puchong
47100 Puchong, Selangor, Malaysia.
Tel: +603-5882 7757 / 7758
Production Factory (Malaysia)
2, Jalan Meranti Puchong D25@Meranti Puchong 47120 Puchong, Selangor, Malaysia
Export Sales Office (Singapore)
Amperes Asia Pte Ltd
(Co Reg: 201102253E)
1, North Bridge Road, #13-03, High Street Centre, Singapore 179094