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Kronos AV
Kronos AV
Advance Acoustic
Advance acoustic was formed after the decision was made in Toulouse France, to create a new French brand with an idea which was both simple and audacious: to design audio equipment, reasonably priced but with faultless musical quality. Speakers were the first products off the production line, with 5 models becoming available.
These were an instant success and received high praise from many French magazines. In 2002, Advance Acoustic added electronics to their product catalogue, while keeping the same simple philosophy, reasonably priced without compromising on sound quality.

Advance Acoustic KC400 Speakers
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  • Regular price £690.00
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Advance Paris, Creator of emotions. 
Advance Paris is a story of passion, passion of this job of creator of emotions, shared with a team working so hard in the quest for perfection. Created by two music enthusiasts more than 20 years ago, Advance Paris - at that time Advance Acoustic - designed its first speakers based on three fundamental points: the cabinet, the speakers and the crossover. 
At this day, this initial orientation remains more than ever relevant. 

The cabinet 
Our high-end philosophy naturally guided us to the cabinet makers known for their seriousness and professionalism. 
Making cabinet is a much more difficult task than it seems. 
The structure of the housing must be homogeneous and completely rigid in order to eliminate the parasitical vibrations disrupting the music. 
That’s why, Advance Paris requires all its cabinet makers subcontractors to use high quality materials, so the high density structural panels are no longer in chipboard, but in wood fibers associated with a synthetic binder. 
The advantages of these composite panels are their homogeneity in the three dimensions : the possibility of working them in large thicknesses, up to 30mm, their non-deformability (shape-retention) and lastly their acoustic performance superior to conventional OSB or PP panels. Thus, to increase rigidity and machining precision, all the cabinets of Advance Paris’ speakers are made of this composite material. 
In order to improve this rigidity and homogeneity, internal reinforcement as well as partitions prevent any formation of parasitical vibrations. 
The enclosure volume is carefully calculated as well as the dimensions of the port for each driver used. Finally, each enclosure is subject to an individual sealling control at the assemblies, both at the belt and the front and rear of the cabinet.

Internal dampling
The displacement of the membrane of the bass and midrange speakers spreads in front of and behind the speaker itself, in phase opposition . The use of a cabinet is intended to eliminate this acoustic short circuit. For this purpose, we are using damping materials specifically developed to effectively treat these stationary waves. Their usage patterns are precise, so for each model, our designers determine the positioning, density and volume of the acoustic foam used. 

The speakers 
The design of our speakers meets a very precise set of specifications, so our boomers and mediums are treated with paper membranes with serrated frame, both lighter and rigid for greater sound neutrality. The use of a "reversed half-roll" profile suspension makes it possible to optimize the linearity of the frequency response of the loudspeakers

Indeed with this type of structure, the profile of the membrane is not disturbed by the final presence of the external suspension. The improvement results in the absence of any phenomenon of accentuation of the energy at the level of the natural high cut of the loudspeaker. Thus, this configuration makes it possible to implement a filter with a low slope and a minimal phase shift. The moving coils made of pure copper are mounted on a kapton support. For greater gentleness and lack of aggressiveness, tweeters have either plastic membranes or impregnated fabrics. The moving coils are cooled in ferrofluid. 

The crossover 
If an extreme care has to be taken for the cabinet and the speakers manufacturing, the crossover will determine the final result. Advance Paris has developed a precise and rigorous filtering technique respecting the electrical and acoustic phase. The choice of the best components, air coils, polypropylene capacitors, precision ceramic resistors, non-radiating positioning of the components between them, judicious cutoff frequencies ensure a perfect sound transcription. 

KC400: Universal listening

The KC400 is a bookshelf speaker*. It is part of the new KUBIK KC series. It takes the philosophy of our KC-800 flagship but in a much smaller volume. This is a reasonably compact 42.5cm high speaker with 2 speakers, a 17cm woofer / midrange paired with a 25mm dome tweeter.
With a performance of 91dB for 1watt / 1m, this speaker combines with an amplifier with a power of 20 to 120W.
The KC400 could be used with optional speaker feet.

2-way and 2 speakers
Woofer / Medium 17cm Reverse damper
Tweeter 2,5cm
Frequency of response: 45Hz-22kHz
Cutoff frequency: 4000Hz
Efficiency: 91dB
To amplify 20 - 120W
Dimensions: 42.5 x 32.5 x 19.5 cm
Weight: 7.1kgs

We are still delivering orders as normal. When your order ships you will still receive tracking details. For UK shipments, Our couriers have procedures in place to ensure deliveries are arriving as quickly & safely as possible. Drivers can now sign for your parcels, however will notify you that they have arrived, in order to ensure you receive your parcel. Signing for the parcel has now been stopped temporally for hygiene reasons. Drivers are also working with customer instructions, so you can ask them to leave the parcel in a safe place (doorstep etc...) if you prefer not to come into direct contact with the driver.

There has been no changes to deliveries with Brexit. All deliveries to the UK mainland, Northern Ireland and the Republic of Ireland are operating as normal. No VAT or charges are applicable. 

Express Deliveries

Express Delivery is FREE on all orders over £50. Express Delivery offers delivery in 24-72 hours from time of purchase. We use premium couriers for this service, mainly DPD & Royal Mail. DPD will offer you a one hour window for delivery to make sure someone is at home, or you can reschedule the delivery if no one is around. 

Standard Deliveries

Here at Kronos AV, we have vast experience with e-commerce sales. Making sure that your parcel arrives undamaged is a huge priority for us. That’s why at Kronos AV, we only use premium couriers for all our orders. All our parcels are shipped with DPD or Royal Mail and are always sent Signed For to make sure it gets to the right person. 

If for any reason your parcel does arrived damaged, please get in touch, and we will be happy to get everything resolved for you. We are always on hand to help!


Delivery is FREE on all orders over £50. In order to offer FREE delivery to UK customers, we use several premium couriers to ensure your delivery arrives safe.

Most large orders (over 2kg) ship using DPD or DHL courier and smaller orders (under 2kg) by Royal Mail signed for services.

The most appropriate courier will be chosen for the items ordered to ensure the quickest possible delivery.

We can offer very generous trade in offers across the majority of our product range. 

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If you have any question, please feel free to call us on 03435236169 or email