20 Most Recent Sennheiser PC145 Consumer Headset Questions & Answers

check test call at skype, if it is good then your headset is ok other wise it is not working specially your mic is not working.

Try the manufacturer's website

See user manual page 17 and page 30 of manual. HD 450BT (sennheiser.com)

You can contact Sennheiser customer support by visiting their website and clicking on the "Get in Touch" button. You can also find an authorized Sennheiser service partner, submit a warranty or repair request, and find spare parts and accessories on their website. Alternatively, you can use the chat or form on their website to get in touch with Sennheiser customer service for all your questions about their products, repairs, spare parts, and accessories. Contact ' Sennheiser (sennheiser-hearing.com) Support - Sennheiser

You have to wire the plug to eliminate the voltage sent by the sound card. I can't remember if it's the tip or the sleeve, so you'll have to verify with a volt meter. Use a 3 position plug to solder to the mic wires, just don't connect the wires of the mic to the one that has voltage on it

Yes I had the same problem. Under some circumstances the MM100 freezes (didn't figure out when just yet). It's a software issue inside. Solution: open left speaker (the side with the charge connector and hence the battery). Discharge the battery (or just short circuit for half a second) and it works again. Sennheiser should built a reset button on these things.

Just put your problem on social media, including the brabds abd they will answer, i know these kind of cimpanies. Moest just ignore you but hate bad publicity. ain't you have got a forum for consumerproblems?

yes you can buy everywhere an adapter for it

have you checked the Tensioner Pulley? Also may be Water pump Try soap or Belt Dressing on belts n see if it stops squealing,if not most likely Tension Pulley