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Audio Systems/Amp over heating & blowing fuse
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Question
I have a alpine mrv-t500 amp hooked to a alpine swr-1242d sub,
and the fuse keeps blowing & is overheated.
The swr-1242d is a 4 ohm dual voice coil speaker. How do you have it wired? Series or parallel. If parallel, which most car speakers are done, it would be in parallel which would give a 2 ohm load to the amp.
If you have the amp in bridge mode and connected to the above speaker you have overloaded the amplifier because in bridge mode it should have a 4 ohm load.
Therefore, either change the setting for the amp or put the speaker coils in series.
Maybe best way is to go two channel with the amp and connect each amp to one voice coil.
If you DO have the system wired correctly there could be a short in the wiring or the voice coils of the speaker. You can check with a vom or ohmmeter. DC resistance should be about 3 ohms for each coil. If less than that it is in trouble.
Let me know if there is more.
C
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Answers by Expert:
Cleggsan
Expertise
Audio Design Engineer; systems, loudspeakers, cd/dvd players, etc. I am knowledgeable in all high end audio equipment and installations. MAKE SURE YOU GIVE A MAKE AND MODEL NUMBER AND CAR IF IT IS AN AUTO QUESTION. Note: I am getting some who ask good questions that take a lot of time to research but then the questioner fails to read the answer. Please don't ask questions unless you are seriously looking for an answer. If you find an answer to your question otherwise then let me know with your reply. Thank you.
Experience
Have been associated with audio design, standards, testing and component systems for over 40 years.
Organizations
Life Fellow Member of Audio Engineering Society
Life Senior Member of Institute of Electronic and Electrical Engineers
Publications
Review technical manuscripts for IEEE Spectrum
Write occasionally for high-end audio publications
Education/Credentials
BSEE/MSCS/MBA
Past/Present Clients
Past Employee/advisor to several well known audio products manufacturers
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