JLA-250D ±70V 500W 4Ω Mono Class-D Subwoofer Amplifier Module
A compact amplifier module designed for subwoofer and high power applications (Input and output are full range 20Hz to 20kHz). It uses an aluminum heat spreader under the PCB which makes it easy to be retrofitted in the amplifier section of a busted plate amp or an old power amp. Operating temperature is good and can be placed inside a speaker cabinet with no external ventilation.
Capable of high current output for subwoofer duties, the bass is cleaner and more powerful than single chip, single supply amplifiers, and other class-d amps with aggressive current limiting protections. No feeling of restrained performance and will drive the subwoofer to its real capability.
It uses VER2923-223KL high current, low loss ferrite core output inductor which is suitable for subwoofers and other high power duties.
Each JLA-250D is tested for its rated output power* for 10 seconds, powered-on idling for an hour, and then retested again to guarantee a fault-free product.
* Output power tested with +/- 70V DC rails, 1kHz at 4 ohms load
1 pc assembled and tested mono module with heatsink.
Documentation via email
Built in speaker protect
Rugged design without using proprietary parts.
The wiring connections can be retrofitted with most Velodyne subs, mounting and drilling on the plate amp and module should be done by the user.
Velodyne CHT-8QR, CHT-10, CHT-12,
EQ-MAX 10, EQ-MAX 12, 15 etc.
Supply Voltage: ±65V to ±75V DC
Speaker Protect Voltage: 12V DC (100mA)
Output Power(< 1% THD): 300W-8Ω
Output Power(< 1% THD): 500W-4Ω
THD+N: less than 0.05% at 420W 4Ω
Voltage gain: 30x
Input sensitivity: 1.5V RMS
Input impedance: 4K Ω
Load impedance: 4Ω or 8Ω
Idle dissipation: ~6W at ± 70V DC
PCB area: 120mm * 71mm
Footprint w/Coilcraft: 120mm*100mm*55mm (L * W * H)
Overcurrent /short protection: Yes
Speaker Protection: Yes
Over voltage protection: No
Open load protection: Yes
Overheat protection: 100 degC board sensing near mosfet
Main Chip: IRS2092S
4Ω subwoofers with ±60V to ±75V DC supplies
Retrofitting stereo amplifiers
Karaoke / Videoke / Jukebox system
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