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Started by clyde, August 23, 2004, 01:58:47 PM
Quote from: Raymond on August 23, 2004, 02:08:31 PMVery very informative sir. Thanks
Quote from: lancer765 on August 23, 2004, 05:53:36 PMhow much is the fluke? and where do you get the test cd?
Quote from: clyde on August 23, 2004, 01:58:47 PMHi guys, I just want to share my first ever DIY level matching:shown here are some pics i took out of this excitement using a newly acquired 20MHz Fluke123 digital scopemeter.my major measurement tool and the setup:Test Tone CDs and the scope meter users manual(still reading) Rear view of amps over the subs boxes:Dash-mounted tweeters of BARC61:First signal clipping catured at 50Hz test tone: notice the voltage rating under the wave form (rms) = +80Vpp w/c can also be defined as directly related to the rms power. Alpine MRV-F1005 rated at 100W RMS per channel at 4ohms with continous supply of 12v. so this amps are quite under-rated but at least i know this time the limits of these amps the first casualty , a blown fuse out of the excessive clipping during the frontal seps test (worst than the one shown above during the subs level matching). i was not able to capture the scope readings as this was already the second fuse blown out of the front amps(alpine mrv-f300). i hope to make use of the screen hold feature of the meter (still learning the use of it that's why )just to show a sample what sould happen if there is excessive clippings present next time--- a blown fuse on the amps well, i was in hurry since we have to go out on a family business last night. i just used this limited 2-hour session out of the excitement. another signal clipping at 50Hz test tone with the subs: medyo nanginig pa yung kamay ko out of konting kaba trying to extract the best un-clipped signal output thinking i might blow a fuse again what i learned here was to level match at least the subs plus the front seps. now there's more sound clarity and i always ask my better half and she always be the judge of my work oh, well gumanda daw, sabi niya now, i'm still learning and trying to tweek this set-up using my new tool. there are still things left unanswered specially that after coming up with a clean unclipped signal at the front seps, there was a huge door vibration a high volume though i'm already using the local Flashband effect on the door skins. hmmm, we'll see on the next quest chapter.any comments are most welcome. do post please. tnx.
Quote from: A+Audio on September 01, 2004, 01:10:33 AMHi clyde how is israel? im i correct 1st of all congrats sa achievements. its a great attempt. I just want to add a few hints.1. set the volume to max and check where its clipping at usually 29 or 30 or not clipping at all to get a clean signal at max volume.2. usually start level match on the seperates ch amp not the sub and using 10khz is too high.3. when a properly level match system when loudness is activated there should be not much difference in sound loudness cuz it is corrected so no more loudness correction. Thats wat i noticed.4. Sub naman use higher than 50hz since u need to know the signal when you set your xover at 70hz which is not within your parameter (50hz) use like 80hz which 70hz is below the low cut level. Hope this helps.If that unit is used properly it thus become a powerfull tool. That separates you from the chamba chamba tuning... THIS IS WHAT ALOT OF AUDIO USER NEED TO UNDERSTAND NOT BECUZ OF PROFIT BUT MERELY FOR PURE MUSIC LOVER IN ALL OF US. Sorry for late reply sa mail ksi now lang avail. computer ko goodluck tnx
Quote from: A+Audio on September 01, 2004, 01:17:33 AMCLYDEIMAGINE IF YOU HAVE TO TUNE A MULTI AMP SAY 6 TO 10 AMPS. PROBABLY WONDER HOW TO GET YOUR POWER MAXIMIZE AND LOUD WITH OUT OVER HEATING THE AMPS OR DRAINING YOUR BATTERY REALLY QUICK..THATS WHY WE ARE VERY SUCCESSFULL SA MGA DEMO CARS NAMIN SA SHOWS. WE HAVE BEEN VERY SUCCESSFUL WITH V12 AND TARGAS AS WELL BUT OFFCOARSE MAY KONTING SECRET WE CANNOT SHARE HEHEHE gOODLUCK