Conditions of sale

To buy a unit, please make an inquiry with details of your shipping method. You will receive a commercial offer with information on payment methods and delivery times. This offer is binding and is valid for 10 days from the date of the offer. I will make the units for you according to your order. Finished units are checked within three working days and dispatched after receipt of payment. The shipping costs and time determine the type of delivery.


Only high-quality components from renowned manufacturers are used for the units.

Each electronic component is measured individually before installation.

The assembled units are subjected to test runs and final measurements to meet the specified conditions. Therefore, the quality of the modules has the highest priority.

All units are made by myself. This is not a mass production, but an amateur activity in my free time.

However, I obliged to:

I  accept the guarantee for the trouble-free operation of the purchased units within 6 months. Of course you will receive a replacement.

In case the claims prove to be justified, the shipping costs will also be refunded.

Force majeure

I will not be liable for delays in delivery or for failure to perform its obligations due to causes beyond its reasonable control including, but not limited to, product allocations, material shortages, labor disputes, transportation delays, unforeseen circumstances, acts of God, acts or omissions of other parties, acts or omissions of civil or military authorities, Government priorities, fires, strikes, floods, severe weather conditions, computer interruptions, terrorism, epidemics, quarantine restrictions, riots or war.

A  prohibition for publishing on the Internet.

It is forbidden to use the texts and images for videos (including LIVE), that are made public on video distribution services on the Internet (YouTube, Facebook, Twitter, Amazon, Microsoft et cetera), due to copyright for both personal and commercial use.

If you want to use texts and images for other tasks, you must directly purchase the right to use (payment for copyright).

All copyrights belong to their respective owners - for any copyright issues, please contact me on


is via a form on the official websites:

Project Harmotronix

Project 7tubes

7tubes, harmotronix