JBL ProSilent a100 Manual page 16

Other notes:
How to minimise noise: The JBL ProSilent Air Pumps were developed according to the latest findings and equipped with a
noise suppression chamber and a particularly thick housing. Nevertheless, the operating noise may even be audible under
optimum conditions, especially at night in a quiet room.
Every air pump generates vibration and buzzing noises, which may be audible to a certain degree. These can be minimised
noticeably by counter-pressure. A reduction of the flow rate at one of the flow rate controls reduces the noise level signifi-
cantly.
Therefore, when using the models with two air connections, never operate an air connection in "idle" i.e. without an
attached hose with an air stone or similar! This results in premature wear of the diaphragm and an increased noise level.
Guarantee
We offer the end user of this JBL product an extended guarantee of 4 years from the date of purchase.
The guarantee covers defects in material and workmanship. Wearing parts such as the diaphragm and damage caused by
external influences and improper handling are exempt from the guarantee. We reserve the right to replace or repair the
defective parts under guarantee at our discretion.
No further guarantee claims will be accepted. In particular, to the extent permissible by law, no liability can be accepted for
consequential damage caused by this appliance. In the event of a guarantee claim, please contact your specialist retailer or
send the product to us with a valid purchase receipt, postage and packaging paid.
JBL GmbH & Co. KG
Dieselstr. 3
67141 Neuhofen
Germany
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