SoundQubed HDX Series Pro Audio Bullet 6.5" Speaker (each)

Name: SoundQubed HDX Series Pro Audio Bullet 6.5" Speaker (each)
Brand: SoundQubed
Price: 99.95 USD
Availability: InStock

$99.95 $119.99

Shipping calculated at checkout.

Key features

Speaker size: 6.5″
RMS power per speaker: 300 W
Speaker impedance: 4.0 ohms
Frequency response: 100 Hz–10 kHz
Basket material: Aluminum
Magnet materials: Ferrite and neodymium

Description

Product Overview

The SoundQubed PA6B-4 is a 6.5-inch pro audio midrange speaker for high-output car audio systems. Its 97 dB sensitivity, 300W RMS handling, and hybrid ferrite-neodymium motor suit builds focused on strong midrange output.

It is a dedicated midrange driver, sold individually. Use it with a high-pass crossover and supporting drivers for a multi-way system.

Key Features & Benefits

Hybrid motor: The 30 + 3 oz ferrite and neodymium system combines neodymium flux density with ferrite thermal mass.
Paper cone: The non-pressed paper cone is designed for a natural midrange character and fast transient response.
High excursion: A 7.2mm one-way Xmax provides linear excursion capability for a 6.5-inch midrange driver.
Voice coil assembly: The 1.5" / 38.6mm CCAW voice coil uses a glass fiber former.
Rigid construction: The speaker uses an aluminum basket and a cloth surround.
Sold individually: Order two speakers if you need a stereo pair.

Technical Specifications

Specification	Value
Nominal Diameter	6.5" / 165mm
Nominal Impedance	4 Ohms
RMS Power Handling	300W
MAX Power Handling	600W
Sensitivity (1W/1m)	97 dB
Frequency Response	100 Hz – 10 kHz
Recommended Hi-Pass Crossover	160 Hz
Sold In	Single

Motor and construction

Specification	Value
Voice Coil Diameter	1.5" / 38.6mm
VC Former Material	Glass Fiber
Winding Material	CCAW
Cone Material	Non-Pressed Paper
Bullet Material	Aluminum
Bullet Color	Black
Surround Material	Cloth
Basket Material	Aluminum
Basket Color	Black
Magnet Material	Ferrite + Neodymium
Magnet Weight	30 + 3 oz
Displacement Volume	0.36L / 0.012ft³

Thiele & Small parameters

Parameter	Value
Equivalent Volume (Vas)	4.7L / 0.16ft³
Excursion One Way (Xmax)	7.2mm
Free Air Resonance (Fs)	150 Hz
Mechanical Factor (Qms)	9.696
Electrical Factor (Qes)	0.589
Total Factor (Qts)	0.556
Mechanical Mass (Mms)	8.236g
Mechanical Compliance (Cms)	0.184mm/N
BL Factor (BL)	5.408
Voice Coil Inductance (Le)	0.4332mH
Cone Area (Sd)	134.78cm²
DC Resistance (Re)	3.6 Ohms
Mechanical Mass w/o Air (Mmd)	9.298g

Speaker measurements

Dimension	Value
Overall Diameter	6.52" / 165.7mm
Overall Depth	3.25" / 82.5mm
Front Mount Baffle Cutout	5.71" / 145mm
Mounting Depth	2.89" / 73.5mm
Motor Diameter	4.72" / 120mm

Why Choose This Product?

The PA6B-4 is designed for competition SPL or SQL systems, high-output daily drivers, and high-efficiency active front stages. Its 97 dB sensitivity and 300W RMS power handling are useful when you want a dedicated midrange driver in a higher-output setup.

Its 150 Hz Fs and 0.556 Qts support use in its intended midrange band. The non-pressed paper cone and hybrid motor give this driver a distinct combination of materials and design characteristics.

Installation & Compatibility Notes

Use a high-pass crossover at 160 Hz minimum. For high-output builds, the source recommends an active crossover or DSP, with a band-pass configuration of 160 Hz HPF and 8–10 kHz LPF.

The speaker is rated at 300W RMS and 4 Ohms. A dedicated amplifier channel providing 150–300W RMS at 4 Ohms is recommended. The SoundQubed Q4-2000 is listed at 325W x4, and the Q4-3200 at 520W x4.

For a three-way active front stage, the PA6B-4 is described for pairing with the SoundQubed HDX Series 2.2" titanium dome tweeter, crossed at 3.8 kHz HPF, plus a dedicated subwoofer or midbass driver. A DSP can manage crossover points between the drivers.

Check the mounting location against the 5.71" / 145mm baffle cutout and 2.89" / 73.5mm mounting depth. The overall diameter is 6.52" / 165.7mm, and overall depth is 3.25" / 82.5mm.

Frequently Asked Questions

Is the PA6B-4 a full-range speaker?

No. It is a dedicated pro audio midrange driver. Use a high-pass crossover set to 160 Hz minimum, along with a tweeter and a subwoofer or midbass driver.

What amplifier power is recommended?

The PA6B-4 handles 300W RMS at 4 Ohms. A dedicated channel rated for 150–300W RMS at 4 Ohms is recommended.

Is the PA6B-4 sold as a pair?

No. It is sold as a single speaker. Order quantity two for a stereo pair.

How does it differ from the PA69B-4?

The PA6B-4 is a 6.5" round midrange rated at 300W RMS, 97 dB, and Fs 150 Hz, with a 160 Hz HPF recommendation. The PA69B-4 is a 6x9" midrange rated at 350W RMS and 99 dB, with Fs 100 Hz and a 100 Hz HPF recommendation. The PA69B-4 has a lower Fs and handles more power; the PA6B-4 fits standard 6.5" round locations.