RE: This topic is very confusing - neolith - Planar Speaker Asylum

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RE: This topic is very confusing

In Reply to: RE: This topic is very confusing posted by Davey on July 25, 2015 at 09:55:18:

Not to confuse the OP more I would derate items #3 and #4 from "distant" to pretty much useless. We have discussed #4 (fuses) in the past and I think the consensus is that a standard fast-blow fuse is useless. A polyswitch is preferable but the choice is not a simple 1 for 1 swap for the fuse. A RXEF110 (1.10A) or perhaps less would be a reasonable choice (available from Parts Express for $1.50) for the tweeter but only protects from overvoltage. However, the same protection could be had by maintaining sane listening levels.
As far as #3 (cap), I fail to see how this is going to help very much. The cap will block steady dc but is useless against high frequency overload caused by clipping. Also with on-off thumps even though the signal may be dc it is not steady state but transient and the cap will not block the signal -- it will only charge up and then discharge through the ribbon. The larger the cap the better at blocking dc and lower frequency signals (2 or more octaves below the -3db point of the HP filter) but then more energy is stored (and released). Smaller caps will still block dc but then the crossover frequency and slope are altered and the design of the crossover needs to be reconsidered.
My suggestion is to follow items #1 and #2 - a well-behaved amp with no thumps and no dc offset. FWIW, I use a class D amp which has an idle power consumption equivalent to a night light and leave it on all the time.

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Follow Ups Full Thread

Topic - Actively Triamping Magnepan ribbons..do you protect them or not ? - Carl G 20:09:56 07/21/15 (15)

This topic is very confusing - Carl G 08:59:24 07/25/15 (5)

RE: This topic is very confusing - Satie 12:22:02 07/25/15 (0)

RE: This topic is very confusing - computerman 10:18:03 07/25/15 (0)

RE: This topic is very confusing - Davey 09:55:18 07/25/15 (2)

RE: This topic is very confusing - neolith 20:46:14 07/25/15 (0)

Size of capacitor suggested and quality of cap ? - Carl G 11:05:00 07/25/15 (0)

RE: "I am likely going to triamp my ribbon tweeters of my 20.1's" ... - andyr 19:40:02 07/23/15 (0)

RE: Actively Triamping Magnepan ribbons..do you protect them or not ? - Satie 21:11:24 07/21/15 (7)

How would, could, and should I bi-amp my maggie 2.5rs? - smemmott 19:55:05 07/30/15 (0)

RE: Actively Triamping Magnepan ribbons..do you protect them or not ? - Davey 17:24:59 07/22/15 (4)

RE: Actively Triamping Magnepan ribbons..do you protect them or not ? - Satie 20:47:21 07/22/15 (3)

RE: Actively Triamping Magnepan ribbons..do you protect them or not ? - Davey 06:55:57 07/23/15 (2)

RE: Actively Triamping Magnepan ribbons..do you protect them or not ? - neolith 10:25:58 07/23/15 (1)

RE: Actively Triamping Magnepan ribbons..do you protect them or not ? - Davey 10:49:41 07/23/15 (0)

RE: Actively Triamping Magnepan ribbons..do you protect them or not ? - guitar slim 13:11:12 07/22/15 (0)

Follow Ups

RE: This topic is very confusing - neolith 20:46:14 07/25/15 (0)

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