We are a company based in the South East of the UK in Essex
supplying car audio, car performance and tuning parts, plus
more. We have been trading for over 10 years and have great
technical expertise for our products.

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Helix Ci3 C165.2FM-S3 i3 - Coaxial System 165mm - 3 Ohms - 100w RMS

Item Description

Professional installation and free local collection and delivery can be arranged. Please see the bottom of the description for full details.

HELIX Ci3 C165.2FM-S3

HELIX COMPOSE. The perfect speaker for any composition.

Born out of the increasingly demanding challenges of modern automobile technology and the HELIX-typical pursuit of intelligent solutions, we made the progressive redesign of proven universal speaker systems our mission. The result: our innovative HELIX COMPOSE platform that, according to the motto "developed inside the vehicle, for the vehicle", combines classic universal speakers with the advantages of vehicle-specific systems. Innovative materials and the latest technologies paired with smart, practical engineering - the best of both worlds in harmony: high efficiency, fantastic sound quality and enormous dynamics that fit in any vehicle. HELIX COMPOSE - universal speakers evolved.

Performance highlight

The i3 coaxial systems give you everything you would expect from a great 2-way system: A first-class sound experience that, thanks to the use of high-quality materials and its particularly smart engineering, conveniently finds its way into the automobile. All components harmonize perfectly and form an ideal team with our HELIX and MATCH amplifiers, guaranteeing maximum performance and power output at all times. Furthermore, we implemented our new, mechanical technologies with a clear focus on safety during connection and operation for the purpose of creating ideal conditions for the integration into the vehicle with maximum compatibility.

High efficiency

HELIX COMPOSE equals smart engineering and accordingly implements highly efficient 3 Ohm technology, that perfectly harmonizes with all HELIX and MATCH amplifiers and at the same time allows a clearly perceptible plus in efficiency and maximum sound pressure.

Cenosphere paper cone

With the innovative "Cenosphere" coating, hollow spheres are incorporated into a polyamide layer that is applied to the cone. This process increases the stiffness and also optimizes its internal damping. The result is an exceptionally stable yet lightweight cone that offers outstanding precision in sound reproduction.

High-tech polymer basket

All HELIX COMPOSE i7 and i3 speaker baskets are made of a high-tech polymer composite, which has been additionally reinforced with glass spheres. The result: maximum stability with minimal self-resonance, while also eliminating flux modulation of the magnetic system and maximum resistance to thermal influences. Last but not least, this allows for much more compact basket dimensions and thus simplified installations in cramped installation conditions.

Stunning Highs and outstanding stability

The 0.75" / 20 mm tweeter is equipped with an innovative titanium dome that combines outstanding stability with low moving mass and high inner damping as well as enormous thermal resistance - perfectly made for brilliant and compression-free treble reproduction.

FlexMount165 - Universal meets car-specific

FlexMount is a mounting system based on specially developed adaptor rings, allowing the installation of COMPOSE FlexMount speakers in an almost infinite number of vehicles. Thus, the universal loudspeaker effortlessly becomes a vehicle-specific loudspeaker, that can be easily installed in the original installation position of the vehicle in an acoustically optimized way with the matching FlexMount adaptor ring.

ProConnect - The new industry standard

Our innovative ProConnect terminal is the new industry standard: A professional, automotive connector, allowing the safe use of conventional speaker cables, while also being ideally designed for connection via flat plug with our WireKits, offering maximum flexibility in the design of the sound system upgrade. Furthermore, the connection is interlocked, offers reverse polarity protection and is electrically and mechanically highly stressable.

WireKits - Plug & Play at its best

Our WireKits realize the connection of HELIX COMPOSE coaxial speaker system to the original wiring harness in the most comfortable way. With manufacturing according to the high standards of the automotive industry, these arrestable adaptor cables meet all requirements for the harsh environmental conditions that installers are facing in vehicles every day.

Features

  • 2-way performance coaxial speaker system which combines outstanding sound quality with versatile physical integration options
  • High efficiency and 3 Ohms technology for maximized power output of the amplifier
  • Automotive grade ProConnect connection terminal allows the use of conventional speaker cables or a fast, secure and fail-safe connection via optionally available WireKits
  • Tweeter
    • 0.75" / 20 mm tweeter with titanium dome for accurate and dynamic treble response
    • Highly efficient neodymium magnet for high magnetic flux linearity
  • Midbass
    • 6.5" / 165 mm midbass with unique Cenosphere coated paper cone for precise and detailed sound reproduction
    • High-tech polymer composite basket reinforced with glass beads for enormous rigidity and minimized ringing
    • Powerful magnet system for high efficiency and optimum impulse response
  • Crossover
    • Integrated with 6 dB slope
  • Designed for the optionally available car-specific FlexMount165 adaptors which allow an acoustically optimized and professional integration in the original mounting location of the vehicle
  • Designed for optionally available, car-specific WireKits which allow a non-destructive integration

Technical data

Power handling RMS / Max. P100 / 150 Watts
Frequency response 60 Hz - 25,000 Hz
ImpedanceZ3 Ω
Sensitivity SPL92 dB @ 2.83V / 1m
88 dB @ 1W / 1m
Outer diameterø165.0 mm / 6.50"
Installation diameterø142.0 mm / 5.59"
Installation depth  60.7 mm / 2.39"
   
Midbass
ImpedanceZ3 Ω
DC resistanceRe3.1 Ω
Resonance frequencyFs72 Hz
Mechanical Q factorQms4.02
Electrical Q factorQes1.04
Total Q factorQts0.82
ComplianceCms466 μm/N
Equivalent air volumeVas11.5 L
Force factorB*l3.8 Tm
Cone areaSd133 cm2
Moving massMms10.4 g
Mechanical resistanceRms1.17 kg/s
Voice coil diameter ø25 mm

Voice coil winding height

 10.5 mm
Max. linear excursionXmax+/- 3.2 mm
   
Tweeter  
Voice coil diameterø20 mm
   
Features  
Tweeter Titanium dome and neodymium magnet
Midbass 

Paper with Cenosphere coating, ProConnect terminal
and FlexMount165

Crossover Integrated, 6 dB highpass

Compatibility

  • FlexMount165
  • WireKits

Scope of delivery

2 x Ci3 C165.2FM-S3
1 x Mounting material

Please note - some items may incur extra shipping charges that have to be sent by courier and are too large / expensive to be sent by Royal Mail (for example headlamps, headunits, speakers, lowering springs etc) to the following postcode areas, Channel Islands, BT, most IV, HS, KA-27-28, KW-15-17, AB30-38, AB44-56, FK17-99, G83, KW1-14, PA21-40, PH18-26, PH30-41, PH49-50, all ZE, IM, and any other non mainland postcodes

Professional Installation Available

We now offer professional installation for car audio, vehicle security, styling and performance products.

If a product is available in our store, there is a good chance we can arrange installation for you or help organise a suitable fitting solution.

A free local collection and delivery service may also be available, allowing us to work on your vehicle while you are at work or carrying on with your day.

Please message us before purchasing to confirm installation availability, vehicle compatibility, pricing and whether collection is available in your area.

Installation and collection services are subject to location, workshop availability and the type of work required.

About Us

Big Sounds Low Skirts is a UK-based car audio, vehicle styling and performance specialist located in Essex.

We supply a wide range of car audio, vehicle security, suspension, styling, tuning and performance products from established manufacturers, with new products and listings being added regularly.

We operate from commercial premises and have our own fitting facilities, allowing us to offer practical product knowledge, compatibility guidance and professional installation options for many of the products we sell.

Whether you are looking for a simple speaker upgrade, a complete audio system, suspension components, vehicle security, styling accessories or performance parts, our aim is to help you find the most suitable solution for your vehicle and budget.

We are authorised UK dealers or resellers for the brands we supply, and all products are sourced through recognised manufacturers, distributors and suppliers.

Customers are welcome to contact us through the eBay messaging platform before purchasing if they require compatibility advice, help choosing the correct product, installation information or confirmation that an item is physically in stock.

Big Sounds Low Skirts is a fully registered UK company and is VAT registered.

STOCK AVAILABILITY

We do our best to keep our stock information accurate and update our inventory regularly. However, on rare occasions, an item may show as available when it has already been sold, has been incorrectly recorded, cannot be located in the warehouse or does not pass our final inspection before dispatch.

If you need an item urgently, please contact us through the eBay messaging platform before ordering so we can physically confirm availability. We usually reply within two hours during our extended working hours.

In the unlikely event that your item is out of stock or has been discontinued, we will contact you promptly through eBay and offer the closest suitable like-for-like alternative.

Where possible, we will upgrade you to the replacement or newer model at no additional cost. If the most suitable replacement is significantly more expensive, we will offer it to you at a specially discounted price due to the circumstances.

You are never required to accept an alternative and may choose a full refund instead.

POSTAGE & DELIVERY

We aim to dispatch all orders as quickly as possible using a suitable tracked delivery service wherever available. Estimated delivery dates shown by eBay are provided as a guide and may vary depending on the courier, destination, weather, seasonal demand and other circumstances outside our control.

Any free or standard UK delivery price shown applies to UK mainland addresses where our normal courier service is available.

Additional delivery charges may apply to the Scottish Highlands, Scottish Islands, Northern Ireland, Isle of Man, Isle of Wight, Channel Islands and other offshore or remote locations.

Large, heavy or oversized products may also attract an additional courier surcharge depending on the destination.

Where the actual courier charge is higher than the amount paid at checkout, we will contact you through the eBay messaging platform before dispatch. We will explain the additional cost and ask for your agreement before proceeding.

You may either pay the additional delivery charge or cancel the order for a full refund.

For deliveries outside the UK, any import duty, local tax, customs-clearance fee or other destination charge is the buyers responsibility unless specifically stated otherwise.

Please ensure the delivery address supplied through eBay is complete and correct before placing your order.

RETURNS

Before opening a return request, please contact us through the eBay messaging platform wherever possible. Many issues can be resolved quickly without the need to return the item, which is often a faster and easier solution for everyone.

We want you to be completely satisfied with your purchase. If a return is still required, please open the appropriate return request through eBay.

Unless the item is faulty, damaged or incorrectly supplied, returned products must be unused, unfitted and in their original condition with all packaging, accessories, instructions and supplied components included.

Please do not fit, modify, cut, paint, wire or otherwise alter an item until you have confirmed that it is correct for your vehicle. Items that have been fitted, damaged, modified or returned incomplete may not qualify for a full refund.

Where the buyer has ordered the incorrect item or changed their mind, the buyer may be responsible for return postage in accordance with the return terms shown on the listing and eBays policies.

If an item arrives damaged, appears faulty or is not as described, please contact us before attempting any repair or modification. We may ask for photographs, videos, vehicle details or diagnostic information so we can assess the issue and provide the correct next step.

Refunds are processed after the returned item has been received and inspected. Original delivery charges and additional delivery surcharges may not be refundable where the return is due to buyer error or a change of mind, subject to applicable consumer rights and eBay policy.

TERMS & CONDITIONS

Please read the full listing carefully and check all product details before purchasing. Vehicle compatibility information is provided as accurately as possible; however, variations may exist due to model year, production date, trim level, engine type, factory-fitted equipment, optional extras and previous vehicle modifications.

Where compatibility is uncertain, please contact us through the eBay messaging platform before ordering. Please provide your vehicle registration number, make, model, year, engine size and any other relevant information so we can offer the most accurate guidance possible.

Customers should satisfy themselves that the product selected is suitable for their intended vehicle, application and use before installation. Unless we have specifically confirmed compatibility in writing through the eBay messaging platform, the buyer remains responsible for confirming suitability before fitting.

All products must be inspected before installation. Please do not fit, modify, paint, cut, drill, wire or otherwise alter an item if it appears incorrect, damaged or incomplete. Contact us through the eBay messaging platform before proceeding.

We strongly recommend that electrical, car audio, vehicle-security, suspension, performance and other specialist products are installed by a suitably qualified professional. Incorrect installation, misuse, accidental damage, unauthorised modification or damage caused during fitting may invalidate the manufacturers warranty.

Any warranty claim may require photographs, videos, diagnostic information, vehicle details, proof of professional installation or the return of the product for inspection. A replacement, repair or refund may not be issued until the product has been inspected and the reported fault has been confirmed.

Product photographs may occasionally be representative. Manufacturers may update packaging, product appearance, specifications or included accessories without prior notice. Any supplied replacement will remain suitable and equivalent to the product advertised unless clearly stated otherwise.

We are a UK-based company, and our products are normally sourced from UK manufacturers, authorised distributors and recognised suppliers. Customers purchasing products for use outside the UK are responsible for checking local compatibility, radio frequencies, connectors, voltage requirements, software availability, regulations and legal requirements before purchasing.

Unless we have specifically confirmed otherwise in writing through the eBay messaging platform, we cannot guarantee that a UK-market product will be suitable, approved or fully functional in every country or region outside the UK.

We are authorised UK dealers, resellers or agents for many of the brands we supply. All products are genuine and sourced through recognised manufacturers, distributors and suppliers.

Nothing in these terms excludes or restricts your statutory consumer rights. Products will be supplied as described, of satisfactory quality and fit for their normal intended purpose in accordance with applicable UK consumer law.

All purchases are also subject to the relevant terms, policies and protections of the eBay platform. eBay business sellers must comply with applicable consumer rights and eBay return requirements

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