SoundQubed SQ-HDC-1HDP-8 4.5" Horn Diffuser + 1" Phenolic Driver (each)

Product Overview

Bring focused, high-output treble to your car audio build with the SoundQubed SQ-HDC-1HDP-8 horn diffuser and compression driver. It pairs a 4.5-inch ABS horn with a 1-inch phenolic driver, delivering 108 dB sensitivity with the horn attached. The complete horn-and-driver unit is sold individually.

Key Features & Benefits

• 108 dB sensitivity: The sensitivity rating with horn helps you plan a high-output system.
• 35° rounded coverage: The horn’s stated coverage gives you a defined sound pattern to consider when planning placement.
• Phenolic diaphragm: This driver material is described as offering a warm, smooth high-frequency character.
• 8-ohm impedance: Use one driver with an amplifier rated for an 8-ohm load, or plan parallel wiring for two units.
• High-frequency range: Its 1.5 kHz–18 kHz frequency response identifies its stated operating range.
• Compact magnet: The neodymium magnet measures 0.96" x 0.19" / 24.5x5mm.

Technical Specifications

Driver Specifications

Horn Specifications

Measurements

Why Choose This Product?

The SQ-HDC-1HDP-8 combines the horn and compression driver as one unit, so you can plan around a single 8-ohm high-frequency component. Its stated 108 dB sensitivity is measured with the horn attached, while the 35° rounded coverage describes the horn’s sound pattern.

The phenolic diaphragm, Kapton former, CCAW winding, neodymium magnet, and aluminum driver body are specified materials for this assembly. Check the power ratings, crossover requirement, and mounting measurements against your system plan before choosing it.

Installation & Compatibility Notes

• Crossover: Use a high-pass crossover set at 2 kHz minimum. Do not run the driver full-range. An active crossover or DSP can set the high-pass point for a high-output build.
• Amplifier: The driver is rated at 120W RMS at 8 ohms. Check your amplifier’s 8-ohm power rating and use level control to balance its output with other speakers.
• Parallel wiring: Two units wired in parallel present a 4-ohm load. Confirm that your amplifier supports the resulting impedance before connecting multiple drivers.
• Mounting: Allow for the 3" / 78mm mounting depth, 3.7" / 94mm mounting hole, and 4 x 3.4" / 4 x 86.5mm bolt pattern.

Frequently Asked Questions

Does the SQ-HDC-1HDP-8 include both the horn and driver?

Yes. One unit includes the 4.5" ABS horn diffuser and 1" phenolic compression driver together.

Is this sold as a pair?

No. It is sold as a single unit. Order two for a pair.

What does the 108 dB sensitivity rating describe?

The rating is 108 dB at 1W/1m with the horn attached. The supplied specifications identify it as a horn-equipped sensitivity measurement.

What crossover setting should I use?

Use a high-pass crossover set at 2 kHz minimum. Do not operate the driver full-range.

What load do two units present when wired in parallel?

Two 8-ohm units wired in parallel present a 4-ohm load. Confirm your amplifier’s minimum impedance rating supports that load.

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