amperes electronics
QD2000 Series
Class D Power Amplifier with AFS
QD2000 Series is a high-efficiency Class D amplifier range (250W to 1000W) with AFS. It is suitable for most premium PA installations for centralized or decentralized network systems.
Compatible with both 100V line and 4 Ohm speakers
Auto Fault Sensor (AFS) with dry contact for changeover
RS485 output for remote monitoring
Includes DC soft start to prevent power surges
Introduction
QD2000 Series is a range of high-performance Class D power amplifiers designed for modern public address systems, available in 250W, 500W, 750W, and 1000W 100V line outputs. Built with energy-efficient circuitry, these amplifiers offer wider frequency response, low heat generation, and reliable long-term performance.
Developed through feedback from installers, the QD2000 Series delivers a cost-effective solution without compromising on quality. Each unit features a built-in Auto Fault Sensor (AFS) to monitor system health, with dry contact outputs for failure alerts. It also includes an RS485 communication port for remote monitoring, and an API is available for third-party software integration. Whether used in centralized or decentralized installations, the QD2000 Series is ideal for premium PA system setups that demand efficiency, durability, and smart monitoring.
Series model variants:
QD2025: 250W 100V Line
QD2050: 500W 100V Line
QD2075: 750W 100V Line
QD2100: 1000W 100V Line
Packing information
Carton size : 550 (L) x 465 (W) x 180 (H) mm
Gross weight : QD2025 & QD2050: 8.4 kg / QD2075 & QD2100: 8.6 kg
1 unit(s) per carton
Introduction
QD2000 Series is a range of high-performance Class D power amplifiers designed for modern public address systems, available in 250W, 500W, 750W, and 1000W 100V line outputs. Built with energy-efficient circuitry, these amplifiers offer wider frequency response, low heat generation, and reliable long-term performance.
Developed through feedback from installers, the QD2000 Series delivers a cost-effective solution without compromising on quality. Each unit features a built-in Auto Fault Sensor (AFS) to monitor system health, with dry contact outputs for failure alerts. It also includes an RS485 communication port for remote monitoring, and an API is available for third-party software integration. Whether used in centralized or decentralized installations, the QD2000 Series is ideal for premium PA system setups that demand efficiency, durability, and smart monitoring.
Series model variants:
QD2025: 250W 100V Line
QD2050: 500W 100V Line
QD2075: 750W 100V Line
QD2100: 1000W 100V Line
Packing information
Carton size : 550 (L) x 465 (W) x 180 (H) mm
Gross weight : QD2025 & QD2050: 8.4 kg / QD2075 & QD2100: 8.6 kg
1 unit(s) per carton
QD2000 Series
QD2025
QD2050
QD2075
QD2100
Power requirements
Operating voltage
220 - 240V AC : 50 / 60 Hz or 21-30V DC back up supply
220 - 240V AC : 50 / 60 Hz or 21-30V DC back up supply
220 - 240V AC : 50 / 60 Hz or 21-30V DC back up supply
220 - 240V AC : 50 / 60 Hz or 21-30V DC back up supply
Rated output (rms)
250W 100V line
500W 100V line
750W 100V line
1000W 100V line
Power consumption
350VA (1.3W)
650VA (2.6A)
1000VA (3.9A)
1300VA (5.1A)
Current consumption
15A
25A
40A
50A
DC back up standby current
1.2A (with standby off)
1.2A (with standby off)
1.2A (with standby off)
1.2A (with standby off)
Input, output & communication
Input sensitivity (100V out)
1V rms balanced input via phoenix connector (15k Ohm)
1V rms balanced input via phoenix connector (15k Ohm)
1V rms balanced input via phoenix connector (15k Ohm)
1V rms balanced input via phoenix connector (15k Ohm)
Input link (buffered)
0 dB balanced line (10k Ohm)
0 dB balanced line (10k Ohm)
0 dB balanced line (10k Ohm)
0 dB balanced line (10k Ohm)
Input signal standby
Switchable auto detect / always ON
Switchable auto detect / always ON
Switchable auto detect / always ON
Switchable auto detect / always ON
Input HF filter
150 Hz @ -3 dB slop via DIP switch
150 Hz @ -3 dB slop via DIP switch
150 Hz @ -3 dB slop via DIP switch
150 Hz @ -3 dB slop via DIP switch
Output
100V line / 4 Ohm
100V line / 4 Ohm
100V line / 4 Ohm
100V line / 4 Ohm
4 Ohm output voltage
50V
50V
50V
50V
Frequency response
60 - 20 kHz (+/- 3 dB, 1 kHz)
60 - 20 kHz (+/- 3 dB, 1 kHz)
60 - 20 kHz (+/- 3 dB, 1 kHz)
60 - 20 kHz (+/- 3 dB, 1 kHz)
S/N ratio
>68 dB
>68 dB
>68 dB
>68 dB
THD + N
<1%
<1%
<1%
<1%
Protections
Thermal, short circuit, overload, AC and DC fuses, standby
Thermal, short circuit, overload, AC and DC fuses, standby
Thermal, short circuit, overload, AC and DC fuses, standby
Thermal, short circuit, overload, AC and DC fuses, standby
Cut off temperature
75°C
75°C
75°C
75°C
Communication
RS485 ; 19.2 kbps
RS485 ; 19.2 kbps
RS485 ; 19.2 kbps
RS485 ; 19.2 kbps
Indicators
Signal, Temp, Fault, Power LEDs
Signal, Temp, Fault, Power LEDs
Signal, Temp, Fault, Power LEDs
Signal, Temp, Fault, Power LEDs
Fault relay
NO dry contact ; 3A
NO dry contact ; 3A
NO dry contact ; 3A
NO dry contact ; 3A
Cooling system
Auto temp controlled fan
Auto temp controlled fan
Auto temp controlled fan
Auto temp controlled fan
Operating temperature
-10° to 45°C
-10° to 45°C
-10° to 45°C
-10° to 45°C
Storage temperature
-40° to 70°C
-40° to 70°C
-40° to 70°C
-40° to 70°C
Humidity
95%
95%
95%
95%
Case
Dimensions (W x H x D)
482 x 88 x 340 mm
482 x 88 x 340 mm
482 x 88 x 340 mm
482 x 88 x 340 mm
Weight
6.8 kg
6.8 kg
6.8 kg
6.8 kg
Note: The specification parameters may be changed, added, or omitted without prior notice.
Compatible with both 100V line and 4 Ohm speakers
Class D amplifier for high efficiency and improved frequency response
Auto Fault Sensor (AFS) with dry contact for fast issue detection and backup switching
RS485 port for remote monitoring and control, compatible with iPX5500 data communication box
Built-in high-pass filter to protect connected speakers
Standby mode to save power when idle
Operates on both AC and DC power for backup during outages
Includes DC soft start to prevent power surges
Registered association members of
International recognitions
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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