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The JBL JRX125 is a passive, 4-ohm dual-woofer PA speaker. JBL specifies 500 W continuous power, 2,000 W peak, and recommends an amplifier delivering 500–1,000 W into 4 ohms per speaker. For a stereo pair, use a two-channel amp that is rated to drive each channel at 4 ohms; do not parallel both cabinets onto one channel unless the amp is rated for the resulting load. Powered mixers suit small systems but normally provide less headroom. Use limiters, correct speaker cable and conservative gain structure to avoid clipping.
| # | Product | Price | Where to buy |
|---|---|---|---|
| 1 | Crown XLS 1502 | $500–$620 | Amazon · eBay |
| 2 | Crown XLS 2002 | $700–$850 | Amazon · eBay |
| 3 | Yamaha PX5 | $880–$1,000 | Amazon |
| 4 | Yamaha PX3 | $650–$800 | Amazon |
| 5 | QSC GX5 | $650–$800 | Amazon · eBay |
| 6 | QSC GXD8 | $1,500–$1,800 | Amazon |
| 7 | Crown XTi 4002 | $1,300–$1,700 | Amazon · eBay |
| 8 | Behringer NX3000 | $350–$450 | Amazon · eBay |
| 9 | Peavey IPR2 3000 | $600–$800 | Amazon · eBay |
The picks, in detail
Crown XLS 1502
A two-channel DSP power amp rated 525 W per channel at 4 ohms, closely matching JBL’s lower recommended power figure for one JRX125 on each channel.
- 525 W per channel at 4 Ω
- two channels
- DSP crossover and limiter tools
- One amp can run a stereo pair
- Power matches the recommended entry point
- No built-in mixer or streaming source
Crown XLS 2002
A higher-output two-channel Crown option for a pair of JRX125 cabinets, with DSP controls and a stronger power margin than the XLS 1502.
- two-channel power amp
- 4-ohm speaker operation
- DSP processing
- Appropriate separate channel layout for a stereo pair
- Front-panel DSP controls
- More expensive and heavier than lower-power alternatives
Yamaha PX5
A two-channel Class D power amplifier with DSP, rated 800 W per channel into 4 ohms, inside JBL’s recommended range for one JRX125 per channel.
- 800 W per channel at 4 Ω
- two channels
- DSP and limiter functions
- Direct power match for two cabinets
- Built-in processing reduces external-rack needs
- Requires a mixer or preamp source
Yamaha PX3
A lower-cost PX-series DSP power amp rated for 4-ohm PA loads, useful for a modest two-speaker system where the JBL pair is not expected to cover a large venue.
- two channels
- DSP processing
- 4-ohm rated outputs
- Same processing ecosystem as the PX5
- Compact professional rack format
- Less power reserve than PX5
QSC GX5
A conventional two-channel professional power amplifier rated for 4-ohm loads, suitable for one JRX125 per channel in a simple analog PA rack.
- two channels
- 4-ohm output rating
- professional rackmount format
- Simple, established PA amplifier line
- Separate channels fit a stereo pair
- No onboard DSP
QSC GXD8
A DSP-equipped two-channel power amplifier with substantially more output capability, for installers who need processing and properly managed headroom.
- 1,200 W per channel at 4 Ω
- two channels
- DSP processing
- Advanced processing tools
- Can be configured with conservative limiters
- Its maximum output exceeds JBL’s stated recommended range without limiting
Crown XTi 4002
A two-channel DSP amplifier rated at 1,200 W per channel into 4 ohms, appropriate only with limiter configuration that respects the JRX125 recommendation.
- 1,200 W per channel at 4 Ω
- two channels
- DSP crossover and limiter
- Useful processing and rack-system flexibility
- Separate channels support a stereo pair
- Unrestricted output sits above JBL’s recommended range
Behringer NX3000
A budget two-channel Class D PA amplifier that can run separate JRX125 cabinets from independent channels when the correct operating mode and limiter arrangement are used.
- two channels
- Class D chassis
- 4-ohm capable operation
- Low purchase cost for a rack amp
- Independent channels for left and right cabinets
- Requires external source control and careful setup
Peavey IPR2 3000
A lightweight two-channel power amplifier designed for professional speaker loads, with enough output for a JRX125 pair when each cabinet receives its own rated channel.
- two channels
- 4-ohm operation
- lightweight Class D design
- Portable rack weight
- Separate-channel configuration for stereo PA
- Requires mixer, DSP or source gear upstream
Buying tips
- Run one JRX125 per amplifier channel at 4 ohms for a conventional stereo pair.
- Use speakON or correctly terminated speaker cable, never instrument cable, between the amp and passive speakers.
- Set high-pass filters and limiters before raising system level; audible clipping is a warning, not a target.
As an Amazon Associate and eBay Partner, toptenpick.com earns from qualifying purchases. Prices and availability are subject to change.