SoundQubed HDS Series 6.5" Coaxial 2-way Speakers (pair)
Description
Description
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
| Specification | Value |
|---|---|
| Nominal Diameter | 6.5" / 165mm |
| Nominal Impedance | 4 Ohms |
| RMS Power Handling | 50W |
| MAX Power Handling | 150W |
| Sensitivity (1W/1m) | 85 dB |
| Frequency Response | 75 Hz – 20 kHz |
| Recommended Hi-Pass Crossover | 90 Hz |
| Number of Ways | 2-Way |
| Sold In | Pair |
| Grill Included | Yes |
Woofer Specifications
| Specification | Value |
|---|---|
| Voice Coil Diameter | 1" / 25.5mm |
| Voice Coil Former Material | ASV |
| Winding Material | EISV |
| Cone Material | Paper |
| Surround Material | Rubber |
| Basket Material | Steel |
| Basket Color/Finish | Black Matte |
| Magnet Material | Barium Ferrite |
| Magnet Weight | 226g |
Thiele & Small Parameters
| Parameter | Value |
|---|---|
| Equivalent Volume (Vas) | 7.2L / 0.254ft³ |
| Excursion One Way (Xmax) | 2.7mm |
| Free Air Resonance (Fs) | 78 Hz |
| Mechanical Factor (Qms) | 3.9 |
| Electrical Factor (Qes) | 2.2 |
| Total Factor (Qts) | 1.1 |
| Mechanical Mass (Mms) | 13.8g |
| Mechanical Compliance (Cms) | 268mm/N |
| BL Factor (BL) | 3.62 |
| Voice Coil Inductance (Le) | 0.176mH |
| Cone Area (Sd) | 138.8cm² |
| DC Resistance (Re) | 3.7 Ohms |
| Mechanical Mass w/o Air (Mmd) | 11.5g |
Tweeter Specifications
| Specification | Value |
|---|---|
| Nominal Diameter | 1" / 25.4mm |
| Voice Coil Diameter | 0.5" / 13mm |
| VC Former Material | KSV |
| Winding Material | EISVM |
| Diaphragm Material | Mylar |
| Magnet Material | Neodymium |
| Magnet Weight | 3g |
Speaker Measurements
| Dimension | Value |
|---|---|
| Overall Diameter (With Grill) | 7.28" / 185mm |
| Overall Depth (With Grill) | 3.28" / 83.4mm |
| Overall Diameter (Without Grill) | 6.51" / 165.5mm |
| Overall Depth (Without Grill) | 2.42" / 61.6mm |
| Front Mount Baffle Cutout | 5.6" / 142mm |
| Mounting Depth | 2" / 52mm |
| Motor Diameter | 3.3" / 84mm |
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.
