SoundQubed HDS Series 4" Coaxial 2-way Speakers (pair)

Name: SoundQubed HDS Series 4" Coaxial 2-way Speakers (pair)
Brand: SoundQubed
Price: 49.95 USD
Availability: InStock

$49.95 $59.99

Shipping calculated at checkout.

Key features

Speaker size: 4″
RMS power per speaker: 40 W
Speaker impedance: 4.0 ohms
Mounting depth: 1.7 in / 43.5 mm
Frequency response: 120 Hz–20 kHz
Sensitivity (1 W / 1 m): 83 dB

Description

Product Overview

Give compact factory speaker locations a two-way audio upgrade with the SoundQubed HDS Series 4" coaxial speakers. Each speaker combines a paper woofer cone with an integrated 1" Mylar dome tweeter, and the pair includes grilles.

Key Features & Benefits

40W RMS power handling: The 4-ohm speakers handle 40W RMS and 120W maximum power.
Integrated tweeter: The 1" Mylar dome tweeter provides high-frequency reproduction without a separate tweeter installation.
Paper cone and rubber surround: This woofer construction delivers the natural midrange character described for the HDS series.
Compact 4-inch format: The round design is intended for compact 4" speaker locations.
150 Hz recommended high-pass crossover: High-pass filtering helps protect the driver and suits its upper-midrange and treble focus.
Pair with grilles: Two speakers and grilles are included for a finished installation.

Technical Specifications

Specification	Value
Nominal Diameter	4" / 101mm
Nominal Impedance	4 Ohms
RMS Power Handling	40W
MAX Power Handling	120W
Sensitivity (1W/1m)	83 dB
Frequency Response	120 Hz – 20 kHz
Recommended Hi-Pass Crossover	150 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	153g

Thiele & Small Parameters

Parameter	Value
Equivalent Volume (Vas)	1.8L / 0.063ft³
Excursion One Way (Xmax)	2.3mm
Free Air Resonance (Fs)	105 Hz
Mechanical Factor (Qms)	4.3
Electrical Factor (Qes)	2.2
Total Factor (Qts)	1.4
Mechanical Mass (Mms)	6.4g
Mechanical Compliance (Cms)	184mm/N
BL Factor (BL)	3.2
Voice Coil Inductance (Le)	0.172mH
Cone Area (Sd)	55cm²
DC Resistance (Re)	3.7 Ohms
Mechanical Mass w/o Air (Mmd)	8g

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)	5.27" / 134mm
Overall Depth (With Grill)	2.79" / 71mm
Overall Diameter (Without Grill)	4" / 103.5mm
Overall Depth (Without Grill)	2.26" / 57.6mm
Front Mount Baffle Cutout	3.6" / 92mm
Mounting Depth	1.7" / 43.5mm
Motor Diameter	2.91" / 74mm

Why Choose This Product?

The HDS 4" is the most compact option in the HDS coaxial lineup, designed for factory 4" round locations. Its integrated tweeter and 120 Hz–20 kHz frequency response suit upper-midrange and treble reproduction where space is limited.

With an Fs of 105 Hz, this speaker is not designed for extended bass output. Larger HDS 4x6" or 5.25" coaxials deliver more midbass output when those speaker locations are available.

Installation & Compatibility Notes

Check the mounting location against the 3.6" / 92mm baffle cutout and 1.7" / 43.5mm mounting depth. Allow for the listed overall dimensions if installing the included grille.

Use a high-pass crossover set at 150 Hz to protect the driver. A separate passive crossover is not required for the integrated tweeter. The speakers handle 40W RMS at 4 ohms; they can work with head-unit power and perform best with proper amplification. The SoundQubed S4-100 is a suggested pairing, rated at 100W x4.

Frequently Asked Questions

Are these speakers sold individually?

No. The package is a pair, with two speakers and two grilles included.

Do I need to install a separate tweeter or passive crossover?

No. Each speaker has an integrated 1" Mylar dome tweeter, and a separate passive crossover is not required.

What high-pass crossover setting should I use?

The recommended setting is 150 Hz. Use a high-pass crossover to protect the driver.

Will they fit my vehicle’s speaker location?

They are designed for factory 4" round locations. Compare your location’s cutout and available depth with the listed measurements before installation.