Based on 20 years of experience in pro audio, Fischer Amps are the suppliers for solutions for sound engineers and artists.https://www.fischer-amps.de/index-en.html
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Fischer Amps Partners with Sennheiser to Build Custom IEMS
Fischer Amps helps Sennheiser deliver the sound of the IE500 Pro in the comfort and style of a custom in-ear monitor.
Here's a simple and professional way to start using in-ear monitors
The Fischer Amps In Ear Stick is an award winning in-ear body pack that delivers big sound while staying lightweight.