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Speaker protection | diyAudio
https://www.diyaudio.com/community/threads/speaker-protection.335277/
Many protection boards are sold on e-bay with these *****y undersized relay contacts. Other objection, no latch is included to remember the fault condition and keep the relay open. The modern version uses drain to drain enhancement nfets in series with the speaker. A fet driver is used to energize the gate as long as everything is okay.
speaker protection | diyAudio
https://www.diyaudio.com/community/threads/speaker-protection.201505/
Read Mooly's (or is it Bonsai's) thread about why relays don't always guarantee speaker protection. You may want to adopt his mosFET suggestion instead of a mechanical relay. I agree on the need for speaker protection. I have in the last 40 years damaged two bass/mid drivers due to output offset, one of which only lasted for about 100ms.
Speaker protection | diyAudio
https://www.diyaudio.com/community/threads/speaker-protection.327803/
Hi All I am finishing up the final sub assemblies for a new DIY power amp (LM3886). Two of these being separate Thiele networks which will mount on the chassis. But I am beginning to worry about speaker protection if I upgrade to more expensive speakers. First thing that comes to mind is a...
speaker protection | diyAudio
https://www.diyaudio.com/community/threads/speaker-protection.313651/
Hello everzbody, i looking for speaker protection (dc protection) but without power supply that i can mount directly on speaker , i saw couple of these devices but i …
Speaker Protection Board | diyAudio
https://www.diyaudio.com/community/threads/speaker-protection-board.377896/
2021-10-05 4:08 pm. #1. I've designed a simple speaker protection board using the UPC1237 (Unisonic Taiwan is the manufacturer, originally uPC1237 from NEC) that uses mosfets rather than a relay to switch the speaker. The circuit operates from 25V to 75V with some resistor changes (detailed in the write-up), features power up/down muting, DC offset protection and an …
Soft Start & Speaker Turn-On Delay / DC ... - diyAudio Store
https://diyaudiostore.com/products/soft-start-speaker-turn-on-delay-and-dc-protector-boards
Speaker Turn-On Delay and DC Protector Board Protect your precious speakers from power amplifier turn-on and turn-off transients and amplifier faults such as DC voltage presence at the output. The Speaker Protector connects your speaker after a few seconds from powering on your amplifier, long enough for the power amp to settle down thus eliminating any nasty thumps …
DIY Audio Projects Forum • Speaker Protection Circuits ...
https://diyaudioprojects.com/Forum/viewtopic.php?t=3246
So, I've see PCBs on eBay that are speaker protection boards which include a upc1237 chip and two relays and some other stuff. I don't really ever see people using speaker protection boards, and in all of the speakers/amps that I've bought, I haven't really saw too much along those lines.
Speaker Protection Circuits - diyaudiocart
https://diyaudiocart.com/kits/speaker-protection-circuits
The speaker protection circuit has two main funtions, To protecct the audio amplifier and the loudspeaker during start-up sequence when the amplifier output might exhibit DC voltage. To protect the loudspeakers in the unlikely event of an amplifier power stage failure, where DC component would damage the speaker voic coil. There are no products to list in this category.
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