SoundQubed 3" Compression Neodymium Super Bullet Tweeter (each)

SoundQubed HDX Series PT1N — 3.75" Compression Super Bullet Tweeter | Titanium Diaphragm | 100 dB | Built-In Bass Blocker | Sold Single

The SoundQubed HDX Series PT1N is a high-output 3.75" compression super bullet tweeter engineered for car audio enthusiasts who demand maximum treble output, clarity, and efficiency. Featuring a titanium diaphragm, aluminum round wire winding, a KSV voice coil former, a 1.45 oz neodymium magnet, and an aluminum body with a built-in 3.3μF bass blocker, the PT1N delivers 60W RMS / 120W max at a staggering 100 dB sensitivity with a frequency response of 2.5 kHz–20 kHz at 4Ω. Sold as a single tweeter.

The PT1N’s titanium diaphragm delivers the rigid, low-mass high-frequency reproduction that titanium is known for — crisp, detailed treble with excellent power handling and minimal distortion at high output levels. The aluminum round wire winding on a KSV former provides lightweight, thermally efficient performance for sustained high-power use. The aluminum body acts as a heat sink, dissipating thermal energy during extended high-power listening sessions. The built-in 3.3μF bass blocker provides passive high-pass filtering at approximately 3 kHz — protecting the tweeter from low-frequency content without requiring a separate crossover component.

At 100 dB sensitivity, the PT1N is one of the most efficient tweeters in its class — delivering massive treble output with minimal amplifier power. Whether you’re building a competition SQL system, a high-output daily driver, or a bagger front stage, the PT1N is the super bullet tweeter that delivers.

Why Choose the SoundQubed HDX PT1N?

• 60W RMS / 120W MAX @ 4Ω — High power handling for a compression tweeter — handles real amplifier power without thermal compression.
• 100 dB Sensitivity (1W/1m) — Exceptionally high efficiency — delivers massive treble output with minimal amplification.
• Titanium Diaphragm — Rigid, low-mass diaphragm for crisp, detailed high-frequency reproduction with excellent power handling.
• Aluminum Round Wire Winding on KSV Former — Lightweight, thermally efficient voice coil for sustained high-power performance.
• 1.45 oz Neodymium Magnet — High-flux, compact neodymium motor for maximum sensitivity and output in a 3.75" footprint.
• Built-In 3.3μF Bass Blocker — Passive high-pass filtering at ~3 kHz built into the tweeter body — no separate crossover component required for basic protection.
• Aluminum Body — Rigid, thermally efficient housing that acts as a heat sink during extended high-power use.
• Sold Single — Buy exactly what you need — order quantity two for a stereo pair.

Installation & Pairing Recommendations

Crossover Configuration: The PT1N includes a built-in 3.3μF bass blocker that provides passive high-pass filtering at approximately 3 kHz — sufficient for basic driver protection in a simple 2-way system. For competition and high-output builds, use an active crossover or DSP to set a precise HPF at 3 kHz for maximum output and driver protection. The recommended hi-pass crossover is 3 kHz.

Amplifier Pairing: The PT1N handles 60W RMS at 4Ω and is rated at 100 dB sensitivity — it will be significantly louder than most woofers at the same power level. Use a separate amplifier channel or attenuate the tweeter level via your DSP or crossover to balance the system output. The SoundQubed S4-100 (100W x4) or any 4-channel amplifier with per-channel level control is a solid match.

Pairing with Pro Audio Midranges: The PT1N pairs naturally with the SoundQubed PA6B-4 or PA65M-8 6.5" pro audio midranges in a 2-way active front stage. Set the midrange LPF at 3 kHz and the PT1N HPF at 3 kHz for a seamless crossover point. Use a DSP for precise level matching between the 97 dB midrange and 100 dB tweeter.

Mounting: The PT1N requires a 2.9" / 74mm baffle cutout and 1.67" / 42.4mm mounting depth. Overall diameter is 3.75" / 95mm, overall depth is 2.18" / 55.4mm. The compact footprint fits most surface-mount tweeter pods, A-pillar locations, and custom dash installs.

Full Specifications

General

Body / Features

Motor Specifications

Measurements

Frequently Asked Questions

Q: Does the PT1N need a separate crossover?
A: The PT1N includes a built-in 3.3μF bass blocker that provides passive high-pass filtering at approximately 3 kHz — sufficient for basic driver protection in a simple 2-way system. For competition and high-output builds, use an active crossover or DSP set at 3 kHz HPF for precise crossover point management and maximum driver protection.

Q: What midrange or woofer does the PT1N pair with?
A: The PT1N pairs naturally with the SoundQubed PA6B-4 or PA65M-8 6.5" pro audio midranges (crossed at 3 kHz LPF/HPF), or with any SoundQubed HDX Series coaxial or component speaker in a 2-way or 3-way active front stage. Use a DSP to match levels between the 97 dB midrange and 100 dB tweeter.

Q: Why is the PT1N so sensitive at 100 dB?
A: The combination of a neodymium magnet, titanium diaphragm, and compression tweeter design maximizes motor efficiency and acoustic output per watt. At 100 dB, the PT1N will be noticeably louder than most woofers at the same power level — always use a DSP or level control to balance system output.

Q: Is this sold as a pair or single?
A: The PT1N is sold as a single tweeter. Order quantity two for a stereo pair.