klangoptimierung.de > sound optimization > price and guarantee
for a sound optimization service on one instrument I will charge you unique
a single treatment will take approximately 4-5 days
after the treatment, I will give a lifetime guarantee on the instrument - not the musician
should it occur that some resonance weaknesses show after a necessary service and/or repair, the fixing treatment, that normally only takes a few hours, will certainly be free of charge.
with kind regards