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Teunos ![]() Old Croc ![]() ![]() Joined: 23 November 2008 Location: The Netherlands Status: Offline Points: 1793 |
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This one you need to explain to me; why would electrical damping at low frequencies be a problem if you insert a DC blocking cap?
Off course presuming that it is really meant as "last resort HPF protection in case i insert the wrong speakon" or "my amp crapped the bed and really put out DC on the speaker output", or maybe "I wrongly configured the output matrix mixer of my DSP and sent bass to the tweeters". (which are the 3 primary reasons i use them on all HF drivers).
DC blocking cap HPF corner frequency should be chosen well below the intended passband of the speaker. As long as you maintain that rule (I suggest at least an octave below the intended passband), there is absolutely no noticeable impact on damping factor whatsoever.
Edited by Teunos - 06 April 2021 at 3:24pm |
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Best regards,
Teun. |
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fatfreddiescat ![]() Young Croc ![]() ![]() Joined: 15 October 2010 Location: N.E.Wales Status: Offline Points: 1060 |
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With a blocking cap the comp driver is partially decoupled from the amplifier due to the series impedance. This could be a problem due to the comp sharing a waveguide with the mid drivers as the SPL is very high at the throat of the waveguide, the pressure from the mids can cause the comp diaphragm to modulate excessively potentially damaging it. By coupling it directly to the amp or having a low impedance path across it's terminals, the diaphragm will be better damped and should help to reduce the modulation.
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snowflake ![]() Old Croc ![]() Joined: 29 December 2004 Location: Bristol Status: Offline Points: 3096 |
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the compression drivers have an inductor across them so they will be damped at low frequencies. It is the mids I was worried about as cap was between them and the amp. Unless you are using amps that are clipping badly and putting out DC, the DC blocking caps will not help and possibly make things worse. My amps have clip limiters and enough headroom that they never clip anyway. |
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pappdani7 ![]() New Member ![]() Joined: 21 January 2016 Status: Offline Points: 1 |
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Hello! Perfect work!
Could you share the plans of the speaker?
I would like to build my own so i would gladly pay for it as well. My email address: mailto:pappdani7@gmail.com - pappdani7@gmail.com Thank you very much! |
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