Tweeter Protection in Active Setups
50 Watt CAFz'r
Joined: Apr 2004
Posts: 456
I have used, polycell in lower end setups, and in my current active setup. I could not hear the difference, although audiophiles would argue that you can.
PEI, have you ever used a lightbulb to soak up dc?
I would assume that you can't hear a lightbulb in series...what do you think?
PEI, have you ever used a lightbulb to soak up dc?
I would assume that you can't hear a lightbulb in series...what do you think?
1000 Watt CAFz'r
Joined: Oct 2003
Posts: 1,783
Light bulbs by their very nature are resistors with tighly packed coils running through them. A light bulb will not offer just DC protection, but over current protection in general. (AC and DC current equally) I have heard this meathod employed in other speakers, and it degrades the SQ. That said, I've never actually measured a light bulb before to see what it does.
Once again, someone has givin me one more thing to test. I can measure resistance, impedence, capicitance, and inductance with my testing gear. LOL....I never thought I'd be testing a light bulb.
Adam
Once again, someone has givin me one more thing to test. I can measure resistance, impedence, capicitance, and inductance with my testing gear. LOL....I never thought I'd be testing a light bulb.
Adam
The only problem with testing a light bulb, is that is has a very low resistance when it's not on. as you put power through it, the filament heats up (it's coil shaped, but not really a coil)and that heat creates resistance, which creates heat which causes the filament to glow... testing a light bulb is pretty useless, the only real concerns are
A
tiny filament, so not much conductor to carry the signal.
B as you put power through thr filament, it will cause more resistance the more power you put through it.. so your tweeters will not increase in volume as they should in relation to the woofer.
C in theory, if the filament's coiling was tight enough, you could get some weird sonic effects that would seriously degrade sound quality.
just my $0.02
A
tiny filament, so not much conductor to carry the signal.B
as you put power through thr filament, it will cause more resistance the more power you put through it.. so your tweeters will not increase in volume as they should in relation to the woofer.C
in theory, if the filament's coiling was tight enough, you could get some weird sonic effects that would seriously degrade sound quality.just my $0.02
I just moved over to all active and have no protection. One of my main concerns is if someone (and that someone could be me) were to push that button on my active xover that transforms 1hz to x 1000hz and instead of the tweet getting >3500hz, it would be at >350hz. yikes!
My resolution comp set came with "light bulbs" in as part as the passives. I beleive just making a passive set tuned to just under what your active set is at should offer adequate protection...or maybe not?
I dont see ilght bulbs in most higher end passives, so I never though of AC being such an issue unless they use other types of AC filtering parts.
My resolution comp set came with "light bulbs" in as part as the passives. I beleive just making a passive set tuned to just under what your active set is at should offer adequate protection...or maybe not?
I dont see ilght bulbs in most higher end passives, so I never though of AC being such an issue unless they use other types of AC filtering parts.
Guest
Posts: n/a
I always try to incorporate lightbulbs into any passive I make or when active.
It saves tweeters and I find them relatively transparant. If anything, I like how the bulb limits the ultimate SPL of the tweeter so when the volume goes up REALLY HIGH your eyeballs don't shatter [img]tongue.gif[/img]
It saves tweeters and I find them relatively transparant. If anything, I like how the bulb limits the ultimate SPL of the tweeter so when the volume goes up REALLY HIGH your eyeballs don't shatter [img]tongue.gif[/img]
Guest
Posts: n/a
George believes that if a system is designed properly then the elements such as distortion that commonly will blow tweeters up will not be present in the system. George believes that a systems distortion can easily be controlled with the proper system setup. George knows that matching gear that works together and does not overdrive themselves is the simplest way to a distortion free system. George also relys on proper level matching to reduce the chances of distortion.
