This sentence actually creates room for doubt. The tungsten filaments are only used on the HF section of the network. Blogs Recent Entries Best Entries Best Blogs Blog List Search Blogs Home > Forums > Amplifiers > Solid State tweeter ( Compression driver) protection circuit User Name Stay logged in? Reply With Quote 04-20-2010,10:19 PM #2 bob p Better Tone thru Mathematics Join Date May 2006 Location Chicago, USA Posts 2,977 EV used to do this with their ST-350 and ST-350A navigate here
Actually the 1156 is generally rated at 50 watts, not 2.1. My application is to protect the Mid-HF driver in our Renkus-Heinz speakers. As these fuses rely on an air gap there will be a sparkmaintained across the first bit of the fuse wire that melts away. This sentence actually creates room for doubt. great post to read
It may be possible that it does not provide very good protection - I have no idea. Reply With Quote Quick Navigation Lansing Product Technical Help Top Site Areas Settings Private Messages Subscriptions Who's Online Search Forums Forums Home Forums Lansing Product Forums (JBL, Altec, LMCo) Lansing Product I will be trying to protect an Altec 806 and EV T350.
Changing the opamp might have some other benefits since you're not going to be using it's full potential either, and most of them seem to be using the same pinouts.What you BLUES BLUES & MORE BLUES... Overload is not the only mechanism thatcan make an amp go ballistic.It is however, surprising how much a speaker can survive. Check out how Tact audio controls volume (at least partially) on their digital amps.
This is where alot of the "meat" of many musical instruments' sound lies. If you just want overvoltage protection, there is a device called a "Resettable Polyswitch" that some manufacturers use. He's new at this site, but his post seems perfectly valid to me. try this Expect to pay either in dollars, sound quality orpotential for smoke (more $).
It doesn't make sense to bypass the bulbs with fuses as you would be effectively protecting the bulbs at the expense of the speakers. #2 Like Reply Sep 3, 2015 Unless I'm wrong. 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 If a speaker cabinet has two (2) sets of protective devices in a cabinet with two (2) speakers, there is room to wonder if both protective circuits are connected to only
Some people modify the Behringers by taking that signal and running it through a passive low pass filter and just take that straight out of the unit bypassing the rest of http://music-electronics-forum.com/t19354/ To start viewing messages, select the forum that you want to visit from the selection below. If I could upload my photo it would become clear what Im talking about? Re: Help installing bulbs inside my MRX515 to better protect my HF drivers? « Reply #12 on: June 16, 2012, 02:30:06 am » QuoteI never understood why the JBL diaphragms were
I'm not quite sure what could happen if we assume there is a lot of back EMF from the driver and it is looking into the very non-linear back to back http://fallbrookpcusersgroup.org/compression-driver/compression-driver-manufacturers.html In systems I design I always include a limiterbefore the power amp that is set to prevent clipping. Results 1 to 12 of 12 Thread: How does a 40uf capacity protect a compression driver? Registered Office - Suite 201 Berkshire House, 39-51 High Street, Ascot SL5 7HY.
I never understood why the JBL diaphragms were so much higher than the others, and historically, they are much less dependable. You will want to know what kind of wattage your horn is designed to handle, or start with a low wattage bulb and work your way up if they blow but The calculation for the zener would be: at 50 volts peak-to-peak will equal 25 volts peak. his comment is here This ought to finish them off!
To paraphase a few points expressed well at http://www.churchsoundcheck.com/faq4.html (one of the best resources available) by some of the best in the business:.:May I suggest you take a look at the This leaves only electronic devices to do the current breaking. My ultimate fix was replacing all the HF drivers with a Selenium D220Ti. 2 things happened didn't blow any drivers for the rest of the life of the system and clarity
sub << too many to list anymore >> Reply With Quote 05-16-2007,11:12 PM #12 RKLee View Profile View Forum Posts Senior Member Join Date Mar 2007 Location Los Angeles, Calif USA This device will not compress your HF signal to the driver. The fuse has a lot less resistance than the bulbs, so the power will get through. Password Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Community Search Solid State Talk all about solid state amplification.
Not much power to begin with and they have the relay switched outputs that have the double benefit of having DC protection as well as disconnecting the outputs on turn on/off You will blow it up if you try to hard enough. Posted by cumesoftware in forum: The Projects Forum Replies: 6 Views: 3,216 overload circuit Posted by jblueink in forum: The Projects Forum Replies: 4 Views: 1,471 speaker and crossover Posted by http://fallbrookpcusersgroup.org/compression-driver/compression-driver-wharfedale.html And yes - It is (almost allways) drawn in series with the positive lead.
So better to study during development. 23rd July 2007, 04:15 AM #9 Nelson Pass The one and only Join Date: Mar 2001 Try an automobile parking Like Enzo, i too have worked on amusment devices for years (pinball & arcade games). So be careful. 4) People, probably correctly, point out that fuses can't act quickly enough. 5) The back to back Zeners across the driver do act as a "clamp". One thing to look at is what is going on upstream of the speaker enclosure....do you have proper headroom at the desk, is the power amp under rated (most common cause
Swapping them is easy enough if you have SMT soldering equipment. Should I have soldered the 1 amp fuse across all the bulbs? Also choose a system with plenty of headroom. Fast blow fuses large enough that they don't blow in everyday use, but smallenough to offer SOME protection.
I have many things bi or triamped here, and this protective cap thing may have gotten missed on some compression drivers!!! There's a rehearsal studio in Phila that dose this very thing. The 24v bulb would have too high a resistance, and wouldn't allow enough current. New designs happen every day and there are tens of thousands of designs that I have not seen.