Long-term coverage.
Clear system requirements.

Ceratec Audio Design GmbH grants this voluntary limited manufacturer's warranty exclusively to the original business customer that purchased the covered product directly from Ceratec Audio Design GmbH. It applies to entrepreneurs, legal entities under public law and special funds under public law and is not directed at consumers.

The warranty is not automatically transferable to a reseller, installer, project owner, building owner, end customer or any other third party. Any transfer requires the prior express confirmation of Ceratec Audio Design GmbH in text form.

These warranty conditions apply only to new and unmodified cerasonar products invoiced on or after 1 August 2026. Products invoiced before that date remain subject to the warranty commitment, if any, applicable at the date of invoice.

The applicable warranty period begins on the invoice date issued by Ceratec Audio Design GmbH to the original business customer.

Five-year limited functional warranty

Five years for cerasonar invisible loudspeakers and invisible subwoofers, provided that all requirements in section 03 have been fulfilled.

Three-year limited manufacturer's warranty

Three years for cerasonar outdoor loudspeakers and outdoor subwoofers that are expressly identified in the relevant product documentation as suitable for outdoor use.

Two-year limited manufacturer's warranty

Two years for cerasonar amplifiers and other electronic products expressly covered by this warranty.

Products, accessories or components not listed above are covered only where Ceratec Audio Design GmbH expressly confirms a separate voluntary warranty for the relevant product.

The five-year limited functional warranty for invisible loudspeakers and invisible subwoofers applies only where all of the following requirements are satisfied:

1. The product was selected, installed, connected, configured, tested, finished and commissioned by appropriately qualified professionals.
2. The applicable cerasonar installation instructions, technical data sheets, surface-treatment instructions and safety information valid on the invoice date were followed.
3. The loudspeaker or subwoofer passed the prescribed functional test before being permanently covered, plastered, painted, veneered or otherwise finished.
4. The project warranty registration on this page was completed in full by the responsible business customer or professional acting on its behalf and submitted to Ceratec Audio Design GmbH within 30 calendar days after commissioning. A separate system line was entered for every product and configuration group using a different room, construction build-up, amplifier, wiring, audio source, source output level, preset or protection concept.
5. Available installation, commissioning and functional-test records are retained and can be supplied to Ceratec Audio Design GmbH on reasonable request.
6. The connected audio source, analogue output level, amplifier input sensitivity and gain structure were configured so that the amplifier input stage is not overdriven at the maximum intended operating level. Where necessary, a high-output source was attenuated or otherwise limited to a compatible level.
7. The product-specific protection concept prescribed in the product documentation valid on the invoice date was used continuously from first commissioning.

Approved protection concepts

Depending on the product and system configuration, the prescribed protection concept may consist of one of the following:

• a compatible cerasonar DSP amplifier operated with the correct cerasonar factory preset for the connected product and configuration;
• the specified cerasonar protection unit where a conventional amplifier or AV receiver is used;
• the product's integrated protection circuitry where the product documentation expressly permits direct operation without an external protection unit;
• the specified 100 V system configuration, including the prescribed amplifier mode, power allocation and product settings.

Where the product documentation identifies a particular amplifier, protection unit, filter, limiter, preset or configuration as mandatory, that requirement forms part of this warranty. A protection method approved for one cerasonar product must not be assumed to be suitable for another product.

Input signal and gain structure

Loudspeaker-side protection does not protect the system against distortion already created by an overdriven amplifier input. The maximum analogue output level of every connected source must be compatible with the amplifier input sensitivity, input setting and gain structure. High-output streamers, preamplifiers, mixers, converters or other sources must be attenuated, limited or configured where necessary so that the amplifier input stage is not overloaded at the maximum intended operating level. Operation with an overdriven input stage or a clipped or otherwise distorted input signal is outside the intended operating conditions of this warranty.

During the applicable warranty period, Ceratec Audio Design GmbH warrants that the covered product will be free from defects in materials and workmanship and will retain its intended basic product function under normal professional use, subject to these conditions.

The warranty covers the cerasonar product itself. It does not guarantee a particular acoustic result in an individual room or project, an unchanged frequency response after project-specific finishing, compatibility with every third-party product or the absence of construction-related noise, vibration or resonance.

For amplifiers and electronic products, the warranty does not guarantee the permanent availability, functionality or compatibility of third-party streaming services, applications, cloud services, voice assistants, codecs, network functions or external platforms.

This warranty does not cover damage, deterioration, defects or malfunctions caused in whole or in part by:

• transport, loading, unloading or storage after risk has passed;
• incorrect product selection or use outside the intended application;
• unsuitable wall, ceiling, mounting structure, substrate, rear volume, ventilation or environmental conditions;
• incorrect installation, wiring, polarity, connection, configuration, commissioning or maintenance;
• incorrect plastering, filling, sanding, painting, coating, wallpapering, veneering or other surface treatment;
• failure to perform the prescribed test before permanent covering or finishing;
• input-stage overdrive caused by excessive source output voltage, an incompatible source/amplifier level, incorrect input sensitivity or incorrect gain structure, including operation with a clipped or otherwise distorted input signal;
• operation with unsuitable amplification, amplifier output clipping, excessive power, incorrect impedance, incorrect bridging or overload;
• incorrect DSP settings, an incorrect factory preset or operation without a mandatory filter, limiter, preset or protection unit;
• moisture, condensation, standing water, immersion, frost, excessive heat, corrosion, salt, chemicals, pollution or weather exposure beyond the published product limits;
• normal weathering, colour variation, patina, fading or other cosmetic ageing of outdoor products that does not impair their intended function;
• accident, misuse, negligence, vandalism, fire, lightning, overvoltage, power-supply faults or other external events;
• unauthorised opening, modification, repair, replacement of components or use of non-approved parts;
• incompatible third-party hardware, software, firmware or network infrastructure;
• normal wear and tear or consumable components;
• a removed, altered, damaged or illegible serial number or product label.

Unless Ceratec Audio Design GmbH expressly agrees otherwise in text form, this warranty is limited to examination, repair or replacement of the covered cerasonar product.

The warranty does not cover:

• on-site fault diagnosis, labour, travel, accommodation or project-management costs;
• access to, exposure of, removal of or reinstallation of the product;
• opening or restoration of walls, ceilings, masonry, concrete, furniture or other building elements;
• plastering, filling, sanding, painting, wallpapering, veneering, coating or refinishing;
• scaffolding, lifting equipment, protection work, temporary installations or loss of use;
• damage to other products, construction components or project finishes, except where liability cannot lawfully be excluded.

The customer must take reasonable steps to limit project, removal and restoration costs once a possible defect becomes apparent.

The original business customer must notify Ceratec Audio Design GmbH in text form without undue delay after discovering a possible warranty case and before arranging repairs, removal or replacement at Ceratec Audio Design GmbH's expense.

The claim must include, where applicable:

• the customer's company name and dealer number;
• the cerasonar invoice or order number;
• the product name, quantity and serial number;
• a detailed description of the reported fault;
• photographs, videos, measurements or test results;
• details of the installation, construction and surface finish;
• audio source model, connection type, maximum analogue output level, amplifier input settings and gain structure;
• amplifier model, wiring, DSP preset, limiter and system settings;
• for five-year claims, the submitted project warranty registration with all relevant system lines and the signed installation and commissioning record.

Ceratec Audio Design GmbH may require remote diagnostics, additional documentation, inspection of the installed system or return of the product. A product must not be returned without prior return authorisation and return instructions.

If Ceratec Audio Design GmbH confirms a valid warranty case, it may at its discretion:

• repair the affected product;
• replace the affected product with the same model; or
• provide a technically equivalent successor or replacement product where the original model is no longer available.

A replacement product may differ in appearance, dimensions, connection details, technical implementation or compatibility where the original product is no longer available, provided that it offers a reasonably equivalent core function.

Repair or replacement does not restart or extend the original warranty period. The repaired or replacement product remains covered only for the unexpired remainder of the original warranty period.

Unless otherwise agreed in text form, the customer bears the costs and risk of exposing, removing, packaging and returning the product. The allocation of examination and transport costs is otherwise governed by the applicable contract, the cerasonar Terms of Service and mandatory law.

This warranty is a separate, voluntary manufacturer's warranty. It does not replace the cerasonar Terms of Service and does not extend the statutory or contractual defect rights beyond the express warranty benefits stated here.

Mandatory rights that cannot lawfully be restricted remain unaffected. The inspection and notification obligations applicable to commercial transactions, including section 377 of the German Commercial Code where applicable, also remain unaffected.

In the event of a conflict, an individual agreement or an express project-specific warranty confirmation issued by Ceratec Audio Design GmbH takes precedence over these general warranty conditions. The cerasonar Terms of Service apply in all other respects.

Ceratec Audio Design GmbH
Registered office: Straubingerstrasse 5, 28219 Bremen, Germany
Business, production and returns address: Walter-Bertelsmann-Weg 2, 27726 Worpswede, Germany

Managing Director: Ulrich Ranke
Commercial Register: Local Court of Bremen, HRB 19153
VAT Identification Number: DE 203341909

Telephone: +49 (0) 4792 9557080
Email: info@cerasonar.de

These warranty conditions are governed by German law, excluding the United Nations Convention on Contracts for the International Sale of Goods, to the extent permitted by law. The jurisdiction provisions in the applicable cerasonar Terms of Service remain unaffected.