amperes electronics
QP2000 Series
Class AB Power Amplifier with AFS
QP2000 Series is a durable range of Class AB amplifiers with auto fault sensor (AFS) and standby changeover relay for long-term public address installations. Available in various power ratings of 125W (QP2125), 250W (QP2250), 375W (QP2375), 500W (QP2500).
Built-in protections against inrush current, overload etc
RS485 port for remote controls and monitoring
Digital controls for volume, bass, treble, and fan speed
Operates on both AC and DC power during power outages
Introduction
QP2000 Series is a reliable range of Class AB power amplifiers available in four models — 125W (QP2125), 250W (QP2250), 375W (QP2375), and 500W (QP2500) — designed for long-term performance in public address installations. Built with Auto Fault Sensor (AFS) and an integrated standby changeover relay, the series enables automatic detection and switching to a backup unit during amplifier failure, ensuring continuous operation. Each unit includes an RS485 port for remote monitoring and control via PC (through UART converter) or IP network using iPX5500 interface. Trusted for over a decade in countless projects, the QP2000 Series offers durability, intelligent protection, and flexibility for centralized or distributed PA systems.
Series model variants:
QP2125: 125W 100V Line
QP2250: 250W 100V Line
QP2375: 375W 100V Line
QP2500: 500W 100V Line
Packing information
Carton size : 550 (L) x 465 (W) x 180 (H) mm
Gross weight : QP2125: 13.5 kg / QP2250: 14.6 kg / QP2375: 18 kg / QP2500: 19.9 kg
1 unit(s) per carton
Introduction
QP2000 Series is a reliable range of Class AB power amplifiers available in four models — 125W (QP2125), 250W (QP2250), 375W (QP2375), and 500W (QP2500) — designed for long-term performance in public address installations. Built with Auto Fault Sensor (AFS) and an integrated standby changeover relay, the series enables automatic detection and switching to a backup unit during amplifier failure, ensuring continuous operation. Each unit includes an RS485 port for remote monitoring and control via PC (through UART converter) or IP network using iPX5500 interface. Trusted for over a decade in countless projects, the QP2000 Series offers durability, intelligent protection, and flexibility for centralized or distributed PA systems.
Series model variants:
QP2125: 125W 100V Line
QP2250: 250W 100V Line
QP2375: 375W 100V Line
QP2500: 500W 100V Line
Packing information
Carton size : 550 (L) x 465 (W) x 180 (H) mm
Gross weight : QP2125: 13.5 kg / QP2250: 14.6 kg / QP2375: 18 kg / QP2500: 19.9 kg
1 unit(s) per carton
QP2000 Series
QP2125
QP2250
QP2375
QP2500
Power requirements
Power rating
125W 100V line
250W 100V line
375W 100V line
500W 100V line
Operating voltage
220 - 240V AC or 24V DC back up supply
220 - 240V AC or 24V DC back up supply
220 - 240V AC or 24V DC back up supply
220 - 240V AC or 24V DC back up supply
Power consumption
294 VA (1.1A)
447 VA (1.7A)
749 VA (2.9A)
873 VA (3.3A)
Current consumption
5.9A
10.6A
16.7A
19.6A
Standby current
0.7A
0.7A
0.7A
0.9A
Input, output and controls
Input signal (sensitivity)
1V (+4 dBU) / 10k Ohm via Phoenix connectors
1V (+4 dBU) / 10k Ohm via Phoenix connectors
1V (+4 dBU) / 10k Ohm via Phoenix connectors
1V (+4 dBU) / 10k Ohm via Phoenix connectors
Input gain controls
-40 to 40 dBU
-40 to 40 dBU
-40 to 40 dBU
-40 to 40 dBU
Output
70 / 100V line and 4 Ohm
70 / 100V line and 4 Ohm
70 / 100V line and 4 Ohm
70 / 100V line and 4 Ohm
4 Ohm output voltage
22.3V
31.6V
38.7V
44.8V
Output impedance (max load)
80 Ohm
40 Ohm
27 Ohm
20 Ohm
Frequency response
120 - 15 kHz @ 1 kHz +/- 3 dB
120 - 15 kHz @ 1 kHz +/- 3 dB
120 - 15 kHz @ 1 kHz +/- 3 dB
120 - 15 kHz @ 1 kHz +/- 3 dB
S/N ratio
>70 dB @ 1 kHz, 1V
>70 dB @ 1 kHz, 1V
>70 dB @ 1 kHz, 1V
>70 dB @ 1 kHz, 1V
THD + N
<1%
<1%
<1%
<1%
Protections
Thermal, short circuit, overload, fuse, in-rush current
Thermal, short circuit, overload, fuse, in-rush current
Thermal, short circuit, overload, fuse, in-rush current
Thermal, short circuit, overload, fuse, in-rush current
Cut off temperature
75°C
75°C
75°C
75°C
Cooling system
Auto temperature controlled cooling fan with auto ON
Auto temperature controlled cooling fan with auto ON
Auto temperature controlled cooling fan with auto ON
Auto temperature controlled cooling fan with auto ON
Indicators
LCD with temperature, audio level and address
LCD with temperature, audio level and address
LCD with temperature, audio level and address
LCD with temperature, audio level and address
Communication
RS485 ; 19.2 kbps
RS485 ; 19.2 kbps
RS485 ; 19.2 kbps
RS485 ; 19.2 kbps
Fault sensing
Internal Pilot Ton : 20 kHz, detection at 15 - 20 secs, 10 secs interval
Internal Pilot Ton : 20 kHz, detection at 15 - 20 secs, 10 secs interval
Internal Pilot Ton : 20 kHz, detection at 15 - 20 secs, 10 secs interval
Internal Pilot Ton : 20 kHz, detection at 15 - 20 secs, 10 secs interval
Fault detection response
Standby amplifier relay activation, fault dry contact
Standby amplifier relay activation, fault dry contact
Standby amplifier relay activation, fault dry contact
Standby amplifier relay activation, fault dry contact
Case
Dimensions (W x H x D)
482 x 88 x 335 mm
482 x 88 x 335 mm
482 x 88 x 335 mm
482 x 88 x 335 mm
Weight
11.60 kg
12.70 kg
16.50 kg
18.05 kg
Note: The specification parameters may be changed, added, or omitted without prior notice.
Available in 125W, 250W, 375W, and 500W 100V output in compact 2U size
Built-in auto fault sensor (AFS) and backup relay for automatic switching
Digital controls for volume, bass, treble, and fan speed
Adjustable fan modes for better cooling
Supports RS485 and UART ports for remote monitoring and control
Equipped with multiple protections, including inrush current, overload, thermal, short circuit, and fuse
Operates on both AC and DC power for continuous use during outages
Energy-efficient design to reduce power consumption
Registered association members of
International recognitions
© 1999 - 2024 Amperes Electronics Sdn Bhd. All Rights Reserved.
Payment
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© 1999 - 2024 Amperes Electronics Sdn Bhd. All Rights Reserved.
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
Amperes Asia Pte Ltd
Export Sales Office - Singapore
(Co Reg: 201102253E)
1, North Bridge Road, #13-03, High Street Centre, Singapore 179094
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
Amperes Asia Pte Ltd
Export Sales Office - Singapore
(Co Reg: 201102253E)
1, North Bridge Road, #13-03, High Street Centre, Singapore 179094