SoundQubed SQ-HDX-2HDT-8 6" Aluminum Horn + 2" Titanium Driver (each)

SoundQubed SQ-HDX-2HDT-8 — 6" Aluminum Short Horn Diffuser + 2" Titanium VC Driver with Compression Ring | 114 dB | 8Ω | Sold Single

The SoundQubed SQ-HDX-2HDT-8 is a top-of-the-line 6" aluminum short horn diffuser and 2" titanium compression driver system engineered for the highest-output competition car audio, pro audio front stage, and demo builds where maximum SPL and pattern control from 630 Hz upward is the mission. Featuring a titanium diaphragm, CCAW winding on a Kapton former, a massive 35 oz ferrite magnet (5.27" x 0.67" / 134x17mm), an aluminum driver body, and a 6" aluminum short horn with 57° rounded sound coverage and a 2" / 50.8mm throat diameter, the SQ-HDX-2HDT-8 delivers 160W continuous / 320W RMS / 640W max at a staggering 114 dB sensitivity with horn and a frequency response of 630 Hz–20 kHz at 8Ω. Sold as a single unit.

The SQ-HDX-2HDT-8 steps up from the SQ-HDC-1HDP-8 in every dimension: a 2" voice coil vs 1", a titanium diaphragm vs phenolic, a 35 oz ferrite motor vs neodymium, an aluminum horn vs ABS, and 114 dB sensitivity vs 108 dB — 6 dB more output, which is perceived as approximately 4x louder. The 57° rounded coverage pattern provides wider dispersion than the 1HDP-8’s 35° pattern, making the 2HDT-8 ideal for builds where wide-angle coverage and maximum SPL are both required. The 900 Hz recommended HPF allows the 2HDT-8 to cover a wider frequency range than most compression tweeters — from upper midbass through extended treble — reducing the demands on your midrange driver in a 2-way or 3-way active system.

Why Choose the SoundQubed SQ-HDX-2HDT-8?

• 114 dB Sensitivity (1W/1m) With Horn — One of the highest-output horn driver systems available for car audio — 6 dB more than the SQ-HDC-1HDP-8, perceived as approximately 4x louder.
• 160W Continuous / 320W RMS / 640W MAX @ 8Ω — Pro-grade power handling for a compression horn driver — handles sustained high-power use in the most demanding competition builds.
• Titanium Diaphragm — Premium diaphragm material for crisp, detailed high-frequency reproduction with excellent power handling and minimal distortion at high output levels.
• 35 oz Ferrite Motor (5.27" x 0.67") — Massive motor for sustained high-power performance — the thermal mass to handle 320W RMS continuously without compression.
• 6" Aluminum Short Horn with 57° Rounded Coverage — Wide-angle aluminum horn for maximum SPL and broad dispersion — covers more of the listening area than narrow-pattern horns.
• 2" Voice Coil on Kapton Former — Large-format voice coil for maximum power handling and motor efficiency in a compression driver application.
• 900 Hz HPF — Covers from upper midbass through extended treble — reduces demands on your midrange driver and simplifies system design.
• 8Ω Impedance — Wire two in parallel for a 4Ω load, or use individually with a pro audio amplifier rated at 8Ω.

SQ-HDC-1HDP-8 vs SQ-HDX-2HDT-8 — Which One?

Both are SoundQubed horn driver systems, but they serve different builds. The SQ-HDC-1HDP-8 (1" phenolic, neodymium, ABS horn, 108 dB, HPF at 2 kHz) is the entry point — compact, efficient, and ideal for builds where space is limited and a 2 kHz crossover point is acceptable. The SQ-HDX-2HDT-8 (2" titanium, 35 oz ferrite, aluminum horn, 114 dB, HPF at 900 Hz) is the flagship — 6 dB more output, wider coverage, lower crossover point, and significantly more power handling. If you’re building to win, the 2HDT-8 is the one.

Installation & Pairing Recommendations

Crossover Configuration: The SQ-HDX-2HDT-8 can be crossed over as low as 900 Hz — significantly lower than most compression tweeters. Use an active crossover or DSP set at 900 Hz HPF minimum. For competition builds, a band-pass configuration (900 Hz HPF / 15–20 kHz LPF) is recommended. Never run the SQ-HDX-2HDT-8 full-range.

Amplifier Pairing: The SQ-HDX-2HDT-8 handles 320W RMS at 8Ω and is rated at 114 dB sensitivity — it will be dramatically louder than any woofer or midrange at the same power level. Use a DSP or active crossover with per-channel level control and significant attenuation on the horn driver channel to balance system output. Verify your amplifier’s 8Ω power rating before purchasing.

Impedance & Wiring: The SQ-HDX-2HDT-8 is an 8Ω driver. Two units wired in parallel present a 4Ω load to your amplifier. Verify your amplifier’s minimum impedance rating before wiring multiple drivers in parallel.

Mounting: The SQ-HDX-2HDT-8 requires a 5.75" / 146mm mounting hole diameter with a Ø6.33" / 161mm x 4 — 0.21" / 5.5mm bolt pattern and 5.83" / 148mm mounting depth. Overall dimensions are 6.15" x 6.15" / 156 x 156mm, overall depth is 6.15" / 156mm. This is a large, deep driver — verify your mounting location provides adequate depth and bolt pattern clearance before purchasing.

Full Specifications

General

Driver (Motor) Specifications

Horn Specifications

Measurements

Frequently Asked Questions

Q: How does the SQ-HDX-2HDT-8 compare to the SQ-HDC-1HDP-8?
A: The 2HDT-8 is the flagship — 2" titanium diaphragm, 35 oz ferrite motor, aluminum horn, 114 dB sensitivity, 320W RMS, and a 900 Hz HPF. The 1HDP-8 is the entry point — 1" phenolic diaphragm, neodymium motor, ABS horn, 108 dB, 120W RMS, and a 2 kHz HPF. The 2HDT-8 delivers 6 dB more output (perceived as ~4x louder), wider 57° coverage vs 35°, and a significantly lower crossover point.

Q: Why is the sensitivity rated “with horn”?
A: The 114 dB sensitivity is measured with the aluminum horn attached — the horn focuses and amplifies the driver’s output, significantly increasing sensitivity compared to the driver alone. This is standard practice for horn driver systems and reflects real-world installed performance.

Q: Can the SQ-HDX-2HDT-8 replace a midrange driver?
A: With a 900 Hz HPF and frequency response down to 630 Hz, the 2HDT-8 can cover upper midbass through extended treble in a 2-way active system — reducing the need for a dedicated midrange driver in some builds. Use a DSP to set the crossover point precisely and manage the significant level difference between the 114 dB horn driver and your woofer.

Q: Is this sold as a pair or single?
A: The SQ-HDX-2HDT-8 is sold as a single unit. Order quantity two for a stereo pair.