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Compression Driver Protection

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Some were lead lined and sand filled. This is a major problem with constant directivity horns. What can I do? For our example the on-axis position will be 4" below the center of the horn & 8" above the center of the woofer. navigate here

Constant directivity. The turn on-off pulses and DC offset from the amplifier can easily destroy the diaphragms. Typically these should be in the vertical plane, up and down relative to the speaker. It can be a conical like Coco's. Check This Out

Compression Driver Protection

Applying the same rules as we did with the dome tweeter, we can get 118 - 123 db output at the listening position, but this is far more than we need. Similar to an optical telescope there should be no colouration or distortion in the image or sound. some are made for close monitoring, and other are made for dispersing farther like outside or arena venues. The entire system has to be viewed as a system and all aspects of all of its parts taken into account to obtain the desired performance.

Here is another example: Compression drivers can be used for high frequencies, midrange and even bass. The advantages are... CDs vs domes A dome tweeter will typically have about 90 db sensitivity and wide dispersion. Compression Driver Vs Tweeter Once you have the proper gear you can begin to analyze the loudspeaker in question to see how to get the most out of it.

It generated much more interest than we... short and wide are for close monitoring and wide dispersion. My problem is I just realized I need a HPF on the horns. http://education.lenardaudio.com/en/07_horns_2.html This should give you an idea of the general area of where the acoustical crossover frequency should occur.

permalinkembedsavegive gold[–][deleted] 0 points1 point2 points 2 years ago(0 children)Yes I have two channels. Compression Drivers For Sale sorry having a senior citizen brain failure this evening, which is why its all disjointed. The Multi cell horn was the most common horn for large cinemas until 1960 (at top of page ). I think you might want one of these from PE SPEAKER CIRCUIT BREAKERS from Parts Express ship same day and come with 45 day money back guarantee.

How Does A Compression Driver Work

Sign in here. Get More Info The amp will not clip at this point so we are in a safer region. Compression Driver Protection Review: Behringer A500 power amp Update (March 2013): I posted previously that this amp had failed. Compression Driver Horn Design Note how the response cancellations have changed shape and now occur at different vertical angles.

We start with 90 db at 1m with 1w. check over here What am I looking for in a horn? Maybe start with 2 wired in series outside the cabinet on your 4 ohm load, so that you can observe the glow as you wind up the power! 13th March They contain information about frequency (Hz), energy (dB) and vertical coverage angle (degrees). Compression Driver Vs Bullet Tweeter

usually the longer the horn, the more it is made for farfeild dispersion. The second step to achieving this type of optimized performance should be to analyze the amplitude and phase response of the drivers in your system. All rights reserved. http://fallbrookpcusersgroup.org/compression-driver/compression-driver-light-bulb-protection-circuit.html Protection capacitors must be placed in series between the amplifier and compression driver and compression tweeter.

Longer wave-lengths than the horn length cause the diaphragm to move excessively. Horn Loaded Compression Driver At high frequencies, the amplifier only "sees" the horn, and at low frequencies, it only sees the woofer. The reverse side of the dome is inside a compression chamber.

Musical instrument horns are also round and directional.

Im more than happy with the woofers, not so happy with the mid / high which is why im here asking help, i was advised to buy selenium but cant find amps rated for 4 times the power). I wasn't aware a crossover would change impedance. Midrange Compression Driver This illustrates why the response of the individual drivers is so important in selecting the proper crossover filter settings.

permalinkembedsavegive goldaboutblogaboutsource codeadvertisecareershelpsite rulesFAQwikireddiquettemod guidelinescontact usapps & toolsReddit for iPhoneReddit for Androidmobile websitebuttons<3reddit goldredditgiftsUse of this site constitutes acceptance of our User Agreement and Privacy Policy. © 2017 reddit inc. I know they are protected from lf, but not from wattage overload this is the main reason for my post i will try the 2 x 12v 21w bulbs in series Last edited by doug20; 13th March 2010 at 01:09 PM. 13th March 2010, 01:42 PM #8 godfrey diyAudio Member Join Date: Nov 2009 Location: Cape Town If http://fallbrookpcusersgroup.org/compression-driver/compression-driver-wharfedale.html As you can see at approximately 0 degrees (on-axis) there is good (flat) summing of the woofer and the horn.

Excelsior Audio (704) 675-5435 info @ excelsior-audio.com This page, and all content is Copyright.   © 2008, Excelsior Audio Design & Services, LLC X Close Subjects X Close Lenard Search Subjects ◀ After you have repeatedly measured on and off axis you will begin to see what filter alignments and slopes will work best for that particular combination of drivers. Compression tweeters are rarely used because of cost, and consumer demand for systems to be small. Its physical appearance does not give an intuitive understanding of its function.

The point should now be clear - compression drivers are the right choice for reaching THX reference levels. Low frequency limit for large drivers can be 800Hz. Attempt 2: compression driver Now let's try it with the tweeter that is meant for this kind of output. Top renehuot70 Post subject: Re: crossover of horn vs compression driverPosted: Sat Dec 10, 2016 6:56 pm Joined: Sun Jan 02, 2005 10:11 amPosts: 661Location: Quebec, QC, CA

Traditionally professional sound systems are not designed for fidelity. The lens is no longer used. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving Page 1 of 2 1 2 > Thread Some things to try to get good summation on and off axis are: Move the electrical crossover frequency of the filters farther apart.

Against marketing and popular belief compression drivers do not successfully produce energy above 6k - 10k Hz. Paint spray guns and many pressure pack cans use the same principle. In practise, a line source wave guide results in loss of efficiency as the frequency increases which has to be compensated for. We first started measuring...

I do this with all my Compression drivers and ribbons. This will ensure that the protection capacitor does not effect the crossover frequency response by too much. Should I just not worry about it? 3 commentsshareall 3 commentssorted by: besttopnewcontroversialoldrandomq&alive (beta)[–]GeckoDeLimon 3 points4 points5 points 2 years ago(1 child)That's not how a crossover works. At this point some people would tell you to just put a 4th order Linkwitz-Riley filter on it at 1,200 Hz and be done with it.

The first order of business is to temporally align the two devices so that their signals arrive at the measurement mic at the same time.