SoundQubed HDS Series 5.25" Coaxial 2-way Speakers (pair)

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

Woofer Specifications

Thiele & Small Parameters

Tweeter Specifications

Speaker Measurements

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.