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Helix Pure R-Series PR W165 Premium 6.5 Inch Woofer with Grills 100w RMS

Name: Helix Pure R-Series PR W165 Premium 6.5 Inch Woofer with Grills 100w RMS
Brand: Helix
SKU: 92636
Price: 209.90 GBP
Availability: InStock

£209.90

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SKU: 92636MPN: PR W165

Product variants

Part of the range · 11 productsPart of the Helix Pure Speakers range · 11 products See the range →

The Helix PR W165 is a pair of premium 6.5 inch (165 mm) woofers from the Pure R-Series, rated at 100 W RMS. Built around a mica-paper composite cone and a rigid die-cast aluminium basket, they're designed for active or component speaker builds.

This is the woofer used in the HELIX PR K165.2 component set. Pair with the PR T25-S tweeters for a matching PURE R front stage. HELIX grilles are included.

Key specifications

Type: 6.5" / 165 mm woofer pair
Power handling RMS / max: 100 / 200 W
Impedance: 4 ohms
Frequency response: 40 Hz to 4,000 Hz
Sensitivity: 91 dB @ 2.83 V / 1 m (88 dB @ 1 W / 1 m)
Cone: mica-paper composite
Installation diameter: 141 mm
Installation depth: 66.5 mm

HELIX PURE R-Series

The PURE R-Series sits at the top of the HELIX PURE speaker range, aimed at audiophiles who want uncompromising sound quality, high-grade materials and strong aesthetics. The PR W165 is a core part of that lineup.

A sound experience you can hear and feel

The stiff mica-paper composite cone delivers punchy kick bass and a balanced midrange. An exceptionally powerful magnet system optimises impulse response, while the rigid die-cast aluminium basket uses a streamlined, low-turbulence design for ideal impulse fidelity. Additional ventilation holes in the basket improve voice coil cooling and support the 100 W RMS power handling. HELIX grilles are included to protect the cones.

Features

6.5" / 165 mm premium woofer with stiff mica-paper composite cone for powerful kick bass and balanced midrange
Rigid die-cast aluminium basket with aerodynamic, flow-optimised design for optimised impulse response
Additional basket ventilation holes for improved voice coil cooling and impressive power handling
Powerful magnet system for high efficiency and optimised linear magnetic flux
HELIX grilles included for cone protection

Explore the full range in Helix Pure Speakers.

Specification

Power handling	RMS / Max. P 100 / 200 Watts
Impedance	Z 4 Ω
Frequency response	40 Hz - 4,000 Hz
Sensitivity	SPL 91 dB @ 2.83 V / 1m, 88 dB @ 1W / 1m
Cone	area Sd 133 cm²
Cone	material Mica-Paper composite cone
Voice coil	diameter ø 25 mm
Voice coil	winding height 12 mm
More specs DC resistance Re 3.1 Ω Resonance frequency Fs 57 Hz Mechanical Q factor Qms 5.35 Electrical Q factor Qes 0.63 Total Q factor Qts 0.57 Compliance Cms 440 µm/N Equivalent air volume Vas 10.8 L Force factor B*I 6.1 Tm Moving mass Mms 17.9 g Mechanical resistance Rms 1.19 kg/s Max. linear excursion Xmax +/- 3 mm Outer diameter ø 166 mm / 6.54" Installation diameter ø 141 mm / 5.55" Installation depth 66.5 mm / 2.62"

What's Included

2 x Woofer PR W165
2 x Grille
1 x Mounting material

Product information

Helix

About the Helix PR21620

From our tech experts at CEN

The Helix PR W165 is a pair of 6.5 inch (165 mm) woofers from the Pure R-Series, rated at 100 W RMS and 200 W maximum at 4 ohms. They have mica-paper composite cones and die-cast aluminium baskets, cover 40 Hz to 4 kHz, and come with grilles.

Who it suits

Drivers building a Pure R front stage, or replacing woofers from the PR K165.2 set, which uses this driver. Pair them with the PR T25-S tweeters for a matching active or component setup.

Our tech experts advise

They need a 141 mm cut-out and 66.5 mm of depth, so check door clearance before ordering. There is no crossover in the box, so use a DSP channel or a suitable crossover. Door deadening makes a clear difference to midbass. Get in touch.

Explore the full Helix range at CEN, with fast UK dispatch and expert advice from our Nottingham team. Shop all Helix

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Car audio installation by CEN in Nottingham

Have it Fitted By Our Team

Our team fits car audio, stereos, dash cams and vehicle security at our workshop in Beeston, Nottingham. Tell us your vehicle and we'll confirm the parts and a fitted price.

1
Tell us your vehicle
Make, model and year, and what you'd like fitted.
2
We confirm the parts
Fascia, wiring and interfaces checked for your car, with a fitted price.
3
Fitted at our workshop
Bring it to our Beeston workshop and we do the rest.

Get a Quote Our Services

Unit 25 Technology Drive, Beeston, Nottingham NG9 1LA

Frequently Asked Questions

Q: Will these speakers fit my car?

A: Most car speakers are standard sizes, but mounting depth and fitting rings vary by vehicle. Check the size in the Specification tab against your vehicle, or contact CEN with your registration and we will confirm fitment and any adapters or fitting kits you need.

Q: Do I need an amplifier to run these speakers?

A: Not always. Most speakers will run from a standard head unit, but a dedicated amplifier lets them perform at their best, particularly for component sets and higher power handling models. The RMS figure in the Specification tab is the guide to how much clean power they can use.

Q: What is the difference between coaxial and component speakers?

A: Coaxial speakers combine the tweeter and woofer in one unit for a simple like-for-like upgrade. Component sets separate the tweeter and woofer with a crossover for better imaging and detail, and suit installs where sound quality is the priority.

Q: Do these come as a pair?

A: Unless stated otherwise, car speakers are sold in pairs. Check the product title and What's Included tab, which lists exactly what is in the box.

Q: Can CEN fit these speakers for me?

A: Yes. CEN offers professional installation from our Nottingham premises. Contact us to book an installation slot or ask for a fitting quote.

Q: Does the HELIX PR W165 need a crossover?

A: Yes. Its frequency response is 40 Hz to 4,000 Hz, so it should be run with a low-pass filter from a passive crossover or DSP, alongside a separate tweeter.

Q: How deep is the PR W165?

A: The installation depth is 66.5 mm, with a 141 mm installation diameter and 166 mm outer diameter.

Q: Are grilles included with the PR W165?

A: Yes. The box contains 2 x PR W165 woofers, 2 x grilles and mounting material.