Compression Driver Load Protection
It is rated for 200w peak power and 50 watts continuous with a 500hz crossover. Ian Mackenzie08-30-2005, 10:43 PMI have recently done my own tests in this area and aside from the effects of damping and zobel networks, the effect of active crossovers and series capacitors I can do this because I don't need the voltage sensitivity of the driver. Tom Loizeaux09-02-2005, 06:57 AMMy understandinmg is that the "rule of thumb" is that Zobel networks (resistors between + & -) on tweeters should be at least double the impedance of the Check This Out
I imagine this must be a very common problem in sound reinforcement. If lots of volts are pumped into aspeaker (e.g. It can't be accomplished by whim or fiat.... multiply by .707 to get 17.675 volts rms. https://en.wikipedia.org/wiki/Compression_driver
Compression Driver Vs Tweeter
This then means that the coupling capacitors work harder as well. This makes for a simple circuit. -Tom Share this post Link to post Share on other sites WMcD 477 Klipsch Fanatic Heritage Members 477 6948 posts Location: USA Posted October By the way, I used an 6 ohm resistor for modelling the 2420 driver, which I know is not 100% accurate, but because there is such a low resistor in parallel,
One of the key features in the crossover is the parallel resistor over the +/- from the 2420 driver. Do you think these could affect sound quality? This is because they are used for high frequencies where less power is required and because of their intrinsically high effiiciency. (we all know that much) The level of the drive Horn Driver Speaker Most bigrelays take 10 ms or so to operate.
The DACs are AKM units. Midrange Compression Driver i.e. Thefilament gets hot its resistance goes up (by a factor of 10) andgracefully reduces the power to the speakers preventing any nasty back EMFs. http://forum.speakerplans.com/capacitor-to-protect-compression-drivers_topic32038.html At work we have the lightbulb protectors on a pair of McCauley mains, but man they really distort the signal when they're lighting up.
Significantly, their plug moves the coupling point between the cavity and horn away from the axis of rotation. Compression Driver Horn Design http://www.erse.cc/xover/Results.asp?part=2wayc&f=350&t=399 I wouldn't recommend them in a normal hifi setting because you're really never going to be pushing the steady state of the system that loud (or at least shouldn't be....) For me, the parallel resistor has much less components, easier to predict, easier to implement and can be used as a attenuation circuit at the same time. ---------- For now my Like Frank, I too include a buildout / "series" resistor ( forming an Lpad ) to maintain the circuits' load impedance .
Midrange Compression Driver
I've Bi-amped the 2 way cabinet and running through an behringer electronic crossover, the amp powering these is as follows Modern MOSFET technology 480 Watt max achievement at 4 ohms (2 https://community.klipsch.com/index.php?/topic/87565-protecting-compression-drivers/ I forget the exact part number but can check it tonight.... Compression Driver Vs Tweeter Tried first with 553, to much noice. Compression Driver Vs Piezo If the speakers are not up to the task, sell them and move on to something better.I ran JBL 2445 compression drivers on my mains for many years and never had
OK then. his comment is here Where budget allows Ialways use an amplifier at least rated to deliver the manufacturers rated powerinto a speaker - even when I know that much power will never be needed." Bulbs This will be more spectacular the bigger the amp is relative to the speaker size. Like Frank, I too include a buildout / "series" resistor ( forming an Lpad ) to maintain the circuits' load impedance . Compression Driver Vs Bullet Tweeter
Password Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Community Search Multi-Way Conventional loudspeakers with crossovers Community Links Social Groups Members List Search Forums Show Threads I have been a JBL user for a few decades and have had to change very few diaphragms, three that I can think of, and two of those were damaged by But DC protection can also be done through transformers I think, like the outputs of single ended [tube] amps that are also used to downconvert the tube's voltages. http://vocollectapp.com/compression-driver/compression-driver-light-bulb-protection-circuit.html If when using an active crossover if you thing the sound is sterile , scrubbed or processed sounding compared to a passive crossover its the active crossover that is partly to
Now I have just adjusted the BSS filter a bit around 2kHz to avoid some resonaces and letting the 2450 together with a SET play from 675Hz up to about 16-17kHz Compression Drivers For Sale Also present, is a 20 ohm conjugate that conforms to the mentioned 2 to 1 impedance ratio ( JBL "rule of thumb" ) . At 12 dB per octave, diaphragm displacement remains constant under these conditions.
It happens. .
Hereunder it is. Interestingly, in this work Smith's derivation is confirmed using Finite Element Analysis, a luxury that was unavailable to Smith. It sounds very nice, maybe even a little too much treble for my liking. Compression Driver Protection I use a Passlabs Aleph and its light and day in every respect.:blink: The first watt is the most important watt....now who's quote is that?
Good Luck, -Tom Share this post Link to post Share on other sites mas 2 Forum Veteran Regulars 2 2268 posts Posted October 18, 2007 Tom, the idea of using Note: My M552 has nasty on/off transients. The attenuator formed with the resistor across the voice coil, works the amplifier harder. 2A. http://vocollectapp.com/compression-driver/compression-drivers-uk.html To my ears , and dependant on the value of the conjugate used, the driver/resistor combo can start to sound like a form of applied "soft knee" compression with the threshold
They go hand in in hand and yes, it does make a real difference, so much so that a reversal to prior art is unacceptable. Unfortunately this also means larger value capacitors which tend to have a higher magnitude of such problems. There is definitely something to it. I think adding a light bulb is a bad idea.
Plasma Flat Panel Displays Plasma Flat Panel Great Found Deals! And this is sofar the best sound according to both my ears and all my friends ears too. preprint 7258. ^ http://www.audioxpress.com/magsdirx/voxcoil/addenda/media/seaandland.pdf Sea & Land's Speaker Protection Devices ^ http://www.patentstorm.us/patents/6201680/description.html US Patent 6201680 - Adjustable high-speed audio transducer protection circuit External links WESTERN ELECTRIC speakers Retrieved from "https://en.wikipedia.org/w/index.php?title=Compression_driver&oldid=768208096" Categories: After several milliseconds of this the fast blow cartridge typefuse will have melted thewire.
This appears to be due to dielectric absorption causing the capacitor to have a memory of it last polarisation. A 2420/le85 will be an @ 10-11 ohm driver ( according to Zilches measurements ). - The N1201a has neither a Zobel, nor a compression driver "conjugate" . - Let the