HSMD2500 Amplifier Module

[kiwifi]

I am thinking of using one of these in BTL mode for a subwoofer amp. Any thoughts or experience with this particular module?

HSMD2500 High Power Dual Channel IRS2092 Digital 2×500W 4Ω Bridged 1000W 8Ω Switching Power Supply Professional Power Amplifier AMP Board

Link

Features：
● HSMD2500 is powered by the classic and stable open-loop half-bridge switching power supply for the rear-stage IRS2092 classic CLASS-D power amplifier circuit to ensure that the dual-channel total output reaches 1000W of output power.
● The production of HSMD2500 passes strict material control, advanced SMT/DIP technology, detailed performance testing and aging testing to ensure quality.
● HSMD2500 is flexible to use:
● 2×500W@4Ω dual full-range professional speaker application scenario,
● 1×500W@4Ω+1×250W@8Ω subwoofer integrated sound column active speaker application scenario,
● 1×1000W BLT@8Ω or 1×1200W BLT@4Ω subwoofer application scenarios.

Parameters:
1. Rated power:
● Stereo mode: 2*500W @4Ω / 2*250W @ 8Ω
● Bridge Mono: Mono 1000W @8Ω

2. Control and instruction:
● MUTE control LED status indication, temperature information output, power limiter, over temperature limiter.

3. Audio performance parameters:
● Frequency response: 20HZ-20KHZ
● Signal to noise ratio:> 103dBA
● Total harmonic distortion (THD): <0.3% 1W to full power output (typical value <0.05%)
● Intermodulation distortion (IMD): 0.1%
● Damping coefficient: 110 (20HZ-20KHZ)
● Channel isolation:> 75dB @1KHz Analog input sensitivity: 1VRMS (8 load rated output)
● Analog voltage gain: 32dB (8Q load rated output)
● Maximum level of analog input: 10dBu

4. Electrical parameters:
● Working voltage: AC100V -120V /200V-240V +10%, 50/60HZ
● Power factor: >0.96@> 100W
● Efficiency: 85% @ 1/4 rated power

5. Physical parameters:
● Volume: 206mm* 100mm * 40mm

 

[kiwifi]

I need a more powerful amp for my barrel sub, so I decided to take a chance on this module. Apart from the model number, there is nothing on the PCB identifying a manufacturer. I was surprised to find that the box included all necessary leads and PCB connectors. The reason I chose this module is that it was one of the few ChiFi amps that provided detailed measurements and specifications.

Here's the module with additional heat sinking attached, ready to be installed in the case. I have not tried powering it up yet.

 

[kiwifi]

Only the end plates left to do...

Bottom view

Top view

 

[kiwifi]

Done!

 

[antcollinet]

From the distortion measurements it is probably only Sub suitable.

 

[kiwifi]

From the distortion measurements it is probably only Sub suitable.

Agreed! That's what I am doing.

 

[kiwifi]

For completeness, here's some tips on wiring up this module.

For single ended (unbalanced) input and Bridge Tied Load output, the BTL jumper is inserted and CH2+ input (pin3) must NOT be connected.

For balanced input and BTL output, the BTL jumper is NOT inserted and negative signal from the balanced input is fed into CH2+ input (pin3).

For BTL output, the speaker (+) is connected to the CH1+ output and speaker (-) is connected to the CH2+ output. CH1- and CH2- output pins are not connected.

When mains power is removed from this amp there is a large squelching sound if the amp isn't muted first! The amp is muted by connecting the Mute input (pin 9) to GND (pin 6) through a switch. I connected the other side of the switch to the Status output (pin 8). That way if a fault occurs and the Status pin goes low, the amplifier's output will also be muted.

 

[kiwifi]

I can recommend this amplifier module if you need to build a high power subwoofer amplifier.

My previous amp was rated 225W into 8ohms. I had to add 12dB of attenuation with this amp connected to get a similar SPL, so I estimate the output of this amp to be about 900W into 8ohms.

Power consumption muted is 6W. Idle (Unmuted, no signal) is 16W. The heatsinks that I added are sufficient, and necessary if you don't want to add a cooling fan!

The amp is silent with no signal present and it produces plenty of clean bass. I've tested 10 - 300Hz. This amp can easily drive my barrel sub to it's limit and beyond.