Audio Code AXC ZR04 4" Bullet Midrange Loudspeaker

Product Overview

Build a compact multi-way car audio system around the Audio Code AXC ZR04 4" bullet midrange loudspeaker. Its integrated bullet center phase plug and 260Hz–11.5kHz response suit midrange duties in active or passive systems where a larger driver will not fit.

Key Features & Benefits

• Compact 4" format: Fits custom dash pods, kick panels, A-pillar pods, and tight OEM locations where 5.25" or 6.5" drivers may not fit.
• Bullet center phase plug: Helps control midrange dispersion for focused on-axis sound and reduced off-axis coloration.
• 100W RMS power handling: Supports use in an active system with a dedicated amplifier channel.
• 89.6dB sensitivity: Rated at 1W/1m, this sensitivity gives you a useful reference when planning system output.
• Dedicated midrange design: Use it with a subwoofer and tweeter through an active or passive crossover; it is not a coaxial speaker.
• Sold individually: Each order contains one speaker; order two for a stereo pair.

Technical Specifications

Why Choose This Product?

The AXC ZR04 brings the ZRO series bullet midrange format into a compact 4" size. Its response starts at 260Hz, making it suited to three-way systems using a higher subwoofer crossover point.

For comparison, the AXC ZRO 6 is a 6.5" driver rated at 250W RMS, with 96dB sensitivity and a 100Hz–12kHz response. The ZR04 prioritizes compact mounting; the ZRO 6 offers higher power handling, sensitivity, and lower frequency extension.

Installation & Compatibility Notes

Use the ZR04 with an active or passive crossover. For an active three-way setup, the source recommends a 260–300Hz high-pass filter and a 4–6kHz low-pass filter to hand off to a tweeter.

Plan for a dedicated amplifier channel rated at 50–100W RMS at 4 ohms. Its 4" format is intended for compact locations such as dash pods, kick panels, and A-pillars; check the available mounting space before choosing a location. A DSP amplifier with active crossover capability, such as the JBL DSP4086, is one suggested signal-processing option.

Frequently Asked Questions

Is the Audio Code AXC ZR04 sold as a pair?

No. It is sold individually, with one speaker per order. Order two for a stereo pair.

Does the AXC ZR04 need a crossover?

Yes. It is a dedicated midrange loudspeaker and must be used with an active or passive crossover. The recommended active settings are 260–300Hz high-pass and 4–6kHz low-pass.

What amplifier power should I plan for?

The speaker is rated for 100W RMS at 4 ohms. The source recommends a dedicated amplifier channel rated at 50–100W RMS at 4 ohms.

How does the ZR04 differ from the AXC ZRO 6?

The ZR04 is a 4" driver rated at 100W RMS, with 89.6dB sensitivity and a 260Hz–11.5kHz response. The 6.5" ZRO 6 is rated at 250W RMS, with 96dB sensitivity and a 100Hz–12kHz response.

Where can I mount the ZR04?

Its compact format suits custom dash pods, kick panels, A-pillar pods, and tight OEM locations. Check that the chosen location has room for the speaker.

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