SoundQubed HDS Series 5.25" Coaxial 2-way Speakers (pair)
Description
Description
SoundQubed HDS Series 5.25" 2-Way Coaxial Speakers — Paper Cone | Mylar Dome Tweeter | Pair
The SoundQubed HDS Series 5.25" 2-Way Coaxial is SoundQubed’s entry-level 5.25" coaxial speaker — built for enthusiasts who want a meaningful upgrade over stock dash and 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 184g barium ferrite magnet, and an integrated 1" Mylar dome neodymium tweeter, the HDS 5.25" delivers 45W RMS / 135W max at 83 dB sensitivity with a frequency response of 90 Hz–20 kHz. Sold as a pair with grills included. If you need more power and performance, step up to the SoundQubed HDX Series 5.25" Coaxial — the HDS is the smart starting point for a budget-conscious 5.25" upgrade.
The HDS 5.25" 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 100 Hz, the HDS 5.25" works seamlessly with your amplifier’s built-in crossover — no separate passive crossover required.
The T/S parameters confirm a solid entry-level compact driver: Fs of 95 Hz, Xmax of 2.3mm, Vas of 3.2L, and a cone area (Sd) of 84.9cm². Whether you’re upgrading factory 5.25" dash or door locations, the HDS 5.25" delivers the output and value to get it done.
Why Choose the SoundQubed HDS Series 5.25" Coaxial?
- 45W RMS / 135W MAX @ 4Ω — Handles real amplifier power for an entry-level 5.25" coaxial — a meaningful step up from stock speakers.
- 83 dB Sensitivity (1W/1m) — Works with head unit power, but performs best with proper amplification.
- Paper Cone + Rubber Surround — Classic cone material with a warm, natural midrange character and long-term durability from the rubber surround.
- 184g Barium Ferrite Magnet — Solid motor for an entry-level 5.25" — clean, controlled midrange output.
- 1" Mylar Dome Neodymium Tweeter — Integrated high-frequency driver for extended treble response — no separate tweeter install required.
- 90 Hz–20 kHz Frequency Response — Wide range from upper bass through extended treble — a complete solution in a compact 5.25" footprint.
- Direct-Fit 5.25" Footprint — 4.52" / 115mm baffle cutout fits most OEM 5.25" dash and door locations without modification.
- Grills Included — Complete install-ready package for a clean, finished look.
Installation & Pairing Recommendations
Amplifier Pairing: The HDS 5.25" handles 45W RMS / 135W 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 100 Hz to protect the driver and maximize output.
Upgrade Path: If you need more power handling and performance, the SoundQubed HDX Series 5.25" Coaxial (60W RMS / 180W max, 89 dB, glass fiber cone, neodymium PEI tweeter) is the next step up in the 5.25" lineup.
Mounting: The HDS 5.25" requires a 4.52" / 115mm baffle cutout and 1.96" / 50mm mounting depth. Without grill: 5.12" / 130.2mm diameter, 2.34" / 59.6mm depth. With grill: 6.29" / 160mm diameter, 3" / 77.8mm depth. Verify your mounting location depth before purchasing.
Full Specifications
General
| Specification | Value |
|---|---|
| Nominal Diameter | 5.25" / 133mm |
| Nominal Impedance | 4 Ohms |
| RMS Power Handling | 45W |
| MAX Power Handling | 135W |
| Sensitivity (1W/1m) | 83 dB |
| Frequency Response | 90 Hz – 20 kHz |
| Recommended Hi-Pass Crossover | 100 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 | 184g |
Thiele & Small Parameters
| Parameter | Value |
|---|---|
| Equivalent Volume (Vas) | 3.2L / 0.113ft³ |
| Excursion One Way (Xmax) | 2.3mm |
| Free Air Resonance (Fs) | 95 Hz |
| Mechanical Factor (Qms) | 3.4 |
| Electrical Factor (Qes) | 2.5 |
| Total Factor (Qts) | 1.3 |
| Mechanical Mass (Mms) | 8.9g |
| Mechanical Compliance (Cms) | 311mm/N |
| BL Factor (BL) | 3.1 |
| Voice Coil Inductance (Le) | 0.172mH |
| Cone Area (Sd) | 84.9cm² |
| DC Resistance (Re) | 3.7 Ohms |
| Mechanical Mass w/o Air (Mmd) | 8.5g |
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) | 6.29" / 160mm |
| Overall Depth (With Grill) | 3" / 77.8mm |
| Overall Diameter (Without Grill) | 5.12" / 130.2mm |
| Overall Depth (Without Grill) | 2.34" / 59.6mm |
| Front Mount Baffle Cutout | 4.52" / 115mm |
| Mounting Depth | 1.96" / 50mm |
| Motor Diameter | 2.91" / 74mm |
Frequently Asked Questions
Q: What’s the difference between the HDS and HDX 5.25" coaxials?
A: The HDS is SoundQubed’s entry-level 5.25" — paper cone, 45W RMS, and a Mylar dome tweeter. The HDX Series 5.25" steps up to a glass fiber cone, 60W RMS, 89 dB sensitivity, and a neodymium PEI tweeter for more output and clarity. The HDS is the smart budget choice; the HDX is for builds that demand more.
Q: What amplifier should I pair with the HDS 5.25"?
A: The HDS 5.25" handles 45W RMS / 135W max at 4Ω. The SoundQubed S4-100 (100W x4) is a perfect match for a daily driver build. Set your HPF at 100 Hz for best results and driver protection.
Q: Do I need a separate tweeter or crossover?
A: No — the HDS 5.25" 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 5.25" is sold as a pair — two speakers and two grills are included.
