FAQ

How is the test strip correctly aligned on the JBL PROSCAN COLORCARD?

On the empty JBL PROSCAN COLORCARD you will find grey fields as placeholders indicating how the test strip should be placed. The notes Top and Bottom serve as additional orientation. Since app version 4.0, the app catches alignment errors. After the JBL PROSCAN test strip has been placed, no grey from the placeholder should be visible on any of the fields. It must be completely covered with the colour fields on the test strip.

Behind this is the method of colour detection. The sum of all colours on a field is included in the colour detection. Therefore, the grey must be completely covered. Otherwise, erroneous results will occur.

Example: A white field is darkened by the grey field template and produces a different result. Excess water and associated reflections can cause a similar effect. Each field must be damp/dry with no water stains or wet patches. You can avoid this by correct handling with sideways tapping (do not shake) and a sheet of kitchen roll as an underlay (reflections!). If you receive an error message during the measuring process, it is probably because the test strip is lying crooked on the JBL PROSCAN COLORCARD, so that the grey is clearly visible.

A word about cookies before we continue

The JBL Homepage also uses several types of cookies to provide you with full functionality and many services: We require technical and functional cookies to ensure that everything works when you visit this website. We also use cookies for marketing purposes. This ensures that we recognise you when you visit our extensive site again, that we can measure the success of our campaigns and that the personalisation cookies allow us to address you individually and directly, adapted to your needs - even outside our website. You can determine at any time - even at a later date - which cookies you allow and which you do not allow (more on this under "Change settings").

The JBL website uses several types of cookies to provide you with full functionality and many services: Technical and functional cookies are absolutely necessary so that everything works when you visit this website. In addition, we use cookies for marketing purposes. You can determine at any time - even at a later date - which cookies you allow and which you do not (more on this under "Change settings").

Our data protection declaration tells you how we process personal data and what purposes we use the data processing for. tells you how we process personal data and what purposes we use the data processing for. Please confirm the use of all cookies by clicking "Accept" - and you're on your way.

Are you over 16 years old? Then confirm the use of all cookies with "Noticed" and you are ready to go.

Choose your cookie settings

Technical and functional cookies, so that everything works when you visit our website.
Marketing cookies, so that we recognize you on our pages and can measure the success of our campaigns.

PUSH messages from JBL

What are PUSH messages? As part of the W3C standard, web notifications define an API for end-user notifications that are sent to the user's desktop and/or mobile devices via the browser. Notifications appear on the end devices as they are familiar to the end user from apps installed on the device (e.g. emails). Notifications appear on the end user’s device, just like an app (e.g. for emails) installed on the device.

These notifications enable a website operator to contact its users whenever they have a browser open - it doesn’t matter whether the user is currently visiting the website or not.

To be able to send web push notifications, all you need is a website with a web push code installed. This allows brands without apps to take advantage of many of the benefits of push notifications (personalised real-time communications at just the right moment).

Web notifications are part of the W3C standard and define an API for end user notifications. A notification makes it possible to inform the user about an event, such as a new blog post, outside the context of a website.

JBL GmbH & Co. KG provides this service free of charge, and it is easy to activate or deactivate.