JBL Apex PA1254
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JBL Apex PA1254 Ultra-compact Aluminum Chassis - Image

Ultra-compact Aluminum Chassis

JBL Apex powersports amplifiers feature an ultra-compact aluminum chassis and small footprint design to allow for installation almost anywhere.

JBL Apex PA1254 Conformal-Coated PCB - Image

Conformal-Coated PCB

JBL Apex powersports amplifiers are engineered to withstand harsh conditions, with fully “marinized” circuit boards to ensure flawless power delivery, year after year.

JBL Apex PA1254 Big Dynamic Power - Image

Big Dynamic Power

Dynamic Class D output power is perfectly matched to meet the needs for your JBL car, marine and powersports products.

JBL Apex PA1254 Full-Range Outputs and Selectable Crossovers - Image

Full-Range Outputs and Selectable Crossovers

The Apex PA1254 amplifier features front all-/high-pass crossover filters, selectable rear all-/hi-/lo-pass crossover filters, and front/rear selectable 12dB per octave electronic crossover slopes from 60-, 80-, 120Hz to allow for quick and easy installation.

JBL Apex PA1254 High- and low-level inputs - Image

High- and low-level inputs

Speaker-level and low-level inputs let JBL Apex amplifiers integrate with just about any audio input.

JBL Apex PA1254 Harman Standard Reliability Testing - Image

Harman Standard Reliability Testing

JBL Apex amplifiers have to go through environmental testing that would destroy other amplifiers. JBL freezes them, bakes them, shakes them, blasts them with ultraviolet light & salt spray and drives them at full power for days at a time.

JBL Apex PA1254 JBL Industrial Design - Image

JBL Industrial Design

JBL engineers every product with a high level of design. In applications where the Apex PA1254 will be visible, it will enhance the vehicles asthetic not take away from it.

Specs & Downloads

Item# PA1254


JBL Pro Sound Designed to take a beating

The Apex Series PA1254 powersports amplifiers deliver efficient Class D power, from an ultra-compact chassis, designed to fit into tight spaces and withstand outdoor environments without missing a beat. Available with 4-channels of output power, the Apex Series PA1254 includes selectable front/rear electronic crossover frequency adjustment, with rear lo-pass capability, for quick and easy installation. Plus, it has been engineered for harsh conditions, with power and performance to meet the needs of most audio systems making it the perfect match for all of your JBL car, marine and powersports products.

General Specifications

Max Power
1250W peak
RMS Power Output @ 2Ω (full-range)
125W x 4, <1% THD+N
RMS Power Output @ 4Ω (full-range)
75W x 4, <1% THD+N
RMS Power Output @ 4Ω Bridged (full-range)
250W x 2, <1% THD+N
Front selectable hi-pass filter
off, 60-, 80-, 120Hz @ 12dB/octave
Rear slectable all-/hi-/lo-pass filter
60-, 80-, 120Hz @ 12dB/octave
Frequency Response
20Hz – 20kHz
Signal-to-Noise Ratio (full-range)
>75dB (ref 1W output @ 4Ω)
Fuse rating

What's in The Box?

  • 1 x Amplifier
  • 1 x Stainless steel mounting hardware
  • 4 x High-level input adapters
  • 4 x Zip ties
  • 1 x Spare fuse
  • 2 x JBL sticker
  • 1 x Quick start guide
What's in The Box?

Documents & Downloads

Reviews and Q&A

Customer Reviews

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Product Q&A

Does the amp have signal sense?

Asked by: Ccjr52
Yes. The 12 volt DC offset feature will turn the amplifier on when it senses a signal.
Answered by: Jem at Customer Support
Date published: 2021-07-01
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