SoundQubed HDS Series 6.5" Coaxial 2-way Speakers (pair)

SoundQubed HDS Series 6.5" 2-Way Coaxial Speakers — Paper Cone | Mylar Dome Tweeter | Pair

The SoundQubed HDS Series 6.5" 2-Way Coaxial is SoundQubed’s entry-level 6.5" coaxial speaker — built for enthusiasts who want a meaningful upgrade over stock door speakers without breaking the bank. The HDS Series stands for Heavy Duty Street Series, and that’s exactly what you get: a speaker that handles more power, looks good, and fits your budget. Featuring a paper cone, rubber surround, a 226g barium ferrite magnet, and an integrated 1" Mylar dome neodymium tweeter, the HDS 6.5" delivers 50W RMS / 150W max at 85 dB sensitivity with a frequency response of 75 Hz–20 kHz. Sold as a pair with grills included. If you need more power and performance, step up to the SoundQubed HDX-CX65 — the HDS is the smart starting point for a budget-conscious 6.5" upgrade.

The HDS 6.5" woofer features a 1" / 25.5mm ASV voice coil former wound with EISV winding material, a paper cone with a rubber surround, and a black matte steel basket. The integrated 1" / 25.4mm Mylar dome tweeter uses a neodymium magnet (3g) and EISVM winding on a KSV former for high-frequency reproduction. With a recommended hi-pass crossover at 90 Hz, the HDS 6.5" works seamlessly with your amplifier’s built-in crossover — no separate passive crossover required.

The T/S parameters confirm a solid entry-level driver: Fs of 78 Hz, Xmax of 2.7mm, Vas of 7.2L, and a cone area (Sd) of 138.8cm². Whether you’re upgrading factory 6.5" door locations, the HDS 6.5" delivers the output and value to get it done.

Why Choose the SoundQubed HDS Series 6.5" Coaxial?

• 50W RMS / 150W MAX @ 4Ω — Handles real amplifier power for an entry-level 6.5" coaxial — a significant step up from stock speakers.
• 85 dB Sensitivity (1W/1m) — Efficient enough for head unit power, but designed to perform with proper amplification.
• Paper Cone + Rubber Surround — Classic cone material with a warm, natural midrange character and long-term durability from the rubber surround.
• 226g Barium Ferrite Magnet — Solid motor for an entry-level 6.5" — clean, controlled midrange output.
• 1" Mylar Dome Neodymium Tweeter — Integrated high-frequency driver for extended treble response — no separate tweeter install required.
• 75 Hz–20 kHz Frequency Response — Wide range from upper bass through extended treble — a complete solution in a single 6.5" driver.
• Direct-Fit 6.5" Footprint — 5.6" / 142mm baffle cutout fits most OEM 6.5" door locations without modification.
• Grills Included — Complete install-ready package for a clean, finished look.

Installation & Pairing Recommendations

Amplifier Pairing: The HDS 6.5" handles 50W RMS / 150W max at 4Ω. It pairs well with any SoundQubed 4-channel amplifier — the S4-100 (100W x4) is an ideal match for a budget-friendly daily driver build. Set your amplifier’s HPF at 90 Hz to protect the driver and maximize output.

Upgrade Path: If you need more power handling and performance, the SoundQubed HDX-CX65 (80W RMS / 240W max, 89 dB, glass fiber cone, neodymium PEI tweeter) is the next step up in the 6.5" coaxial lineup.

Mounting: The HDS 6.5" requires a 5.6" / 142mm baffle cutout and 2" / 52mm mounting depth. With grill, overall diameter is 7.28" / 185mm and depth is 3.28" / 83.4mm. Without grill: 6.51" / 165.5mm diameter, 2.42" / 61.6mm depth. Verify your door panel depth before purchasing.

Full Specifications

General

Woofer Specifications

Thiele & Small Parameters

Tweeter Specifications

Speaker Measurements

Frequently Asked Questions

Q: What’s the difference between the HDS and HDX 6.5" coaxials?
A: The HDS is SoundQubed’s entry-level 6.5" — paper cone, 50W RMS, and a Mylar dome tweeter. The HDX-CX65 steps up to a glass fiber cone, 80W RMS, 89 dB sensitivity, and a neodymium PEI tweeter for more output and clarity. The HDS is the smart budget choice; the HDX-CX65 is for builds that demand more.

Q: What amplifier should I pair with the HDS 6.5"?
A: The HDS 6.5" handles 50W RMS / 150W max at 4Ω. The SoundQubed S4-100 (100W x4) is a perfect match for a daily driver build. Set your HPF at 90 Hz for best results and driver protection.

Q: Do I need a separate tweeter or crossover?
A: No — the HDS 6.5" is a 2-way coaxial with an integrated 1" Mylar dome tweeter. No separate tweeter or passive crossover is required — just connect to your amplifier and go.

Q: Are these sold as a pair or individually?
A: The HDS 6.5" is sold as a pair — two speakers and two grills are included.