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How To Not Wire Speakers Like An Idiot
| Good [+1]Toggle ReplyLink» cutterhead replied on Mon Nov 3, 2008 @ 1:21am |
 Coolness: 131830 | i alwas get into this argument about putting 2 4ohm speaker in parallel makes 2 ohm circuit and blows the amp. this is to shut them up.
[ www.colomar.com ] if you want to make 8 ohm speakers out of 8ohms speakers, you need four of em ; 2 in series 2 times in parallel. Update » cutterhead wrote on Mon Nov 3, 2008 @ 1:39am i think war in the middle east started with thwo guys wanting to wire an amplifier
this was the problem , and the solution : 
had to get this off my chest to the total neophies out there that i just cant stand seeing 4 to eight speakers in parallel. ... |
| I'm feeling 4.5kw 240vrms 45a right now.. | |
| Good [+1]Toggle ReplyLink» Blisss replied on Mon Nov 3, 2008 @ 3:16am |
 Coolness: 129955 | you tell them brother! |
| I'm feeling bass heavy right now.. | |
| Good [+1]Toggle ReplyLink» cutterhead replied on Mon Nov 3, 2008 @ 3:37am |
| Coolness: 131830 | lol really you have no idea how manytime i got an argument on this, haven't you ? Update » cutterhead wrote on Mon Nov 3, 2008 @ 3:39am and drawing this crap in a bar to some sound guy of coloured smarties isnt tha obvious / waste of time / will ruin the gear whatever you try =] Update » cutterhead wrote on Mon Nov 3, 2008 @ 3:42am ie : remember that splitter for walkman ?
bad drops the ohmic value by half, but since headphones are normally 16+ ohm, its kinda pointless, but you pair an big pair of 8 ohm and you get 4 youll lose the amp in a month on strenuous usage Update » cutterhead wrote on Mon Nov 3, 2008 @ 3:44am you wont damage it rite away because of overhead permissibility but on a longrun, or on heavy use ill make a nice bend on the polarised clad in one chip |
| I'm feeling 4.5kw 240vrms 45a right now.. | |
| Good [+1]Toggle ReplyLink» No_Comply replied on Tue Nov 4, 2008 @ 1:49pm |
 Coolness: 85170 | Ohms law ftw. |
| I'm feeling gettin more ink soon right now.. | |
| Good [+1]Toggle ReplyLink» cutterhead replied on Wed Nov 5, 2008 @ 2:29am |
| Coolness: 131830 | yea basic shit, but tell me how many people you know will just rigg two speakers in parallel thinking
it doesnt do shit. I have seen so many bars that had 8 ohm speaker rig in parallel on both plug of the stereo, and the amp was 8 ohm by the oms law they were drivin 4 ohm load instead of the minimum amp alowed, witch in turn gave me underpayed job to fix an idiot's that didnt know the obvious. |
| I'm feeling 4.5kw 240vrms 45a right now.. | |
| Good [+1]Toggle ReplyLink» No_Comply replied on Wed Nov 5, 2008 @ 9:45am |
| Coolness: 85170 | Originally Posted By CUTTERHEAD
yea basic shit, but tell me how many people you know will just rigg two speakers in parallel thinking it doesnt do shit. I lost count of how many, you should of seen the amount of fried car amps i've replaced in one summer. Imagine trying to explain dual voice coils =p ...not to mention the difference between resistance and impedance ("no, a 4 ohm resistor wont fix your impedance issues") |
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| Good [+1]Toggle ReplyLink» cutterhead replied on Wed Nov 5, 2008 @ 9:57pm |
| Coolness: 131830 | =8] i feel good now knowing "the truth is out there" ha-ha
i can see the arguments and coworkers issues on that topic in a car performance shop. especially on the dual-voice speakers... soem of these folks dont even change the values, or mod the computer in the car after f' up with the fuel air ratios... so a sound system is even worse. are you a tech/repair man no-compy? or was it just a summer job ? Update » cutterhead wrote on Wed Nov 5, 2008 @ 9:58pm at lease you made money, or gotten free amps , got home and changed the outputs.. |
| I'm feeling 4.5kw 240vrms 45a right now.. | |
| Good [+1]Toggle ReplyLink» No_Comply replied on Thu Nov 6, 2008 @ 10:15am |
| Coolness: 85170 | Originally Posted By CUTTERHEAD
are you a tech/repair man no-compy? or was it just a summer job ? Not professional, but i dabble. Always had an interest in electronics. No free gear, but cost -25% on 2 450wrms 8/8 subs was nice xD. Now to fix my QSC.. |
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| Good [+1]Toggle ReplyLink» cutterhead replied on Thu Nov 6, 2008 @ 1:21pm |
| Coolness: 131830 | what model ?
i rep amps. have loads of shematics too. |
| I'm feeling 4.5kw 240vrms 45a right now.. | |
| Good [+1]Toggle ReplyLink» No_Comply replied on Thu Nov 6, 2008 @ 1:24pm |
| Coolness: 85170 | USA-1300, if im not mistaken. It's an old one, It's perfectly happy in 8ohm stereo, but in 4 stereo it surges through the channels every 30 seconds or so. |
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| Good [+1]Toggle ReplyLink» cutterhead replied on Thu Nov 6, 2008 @ 4:55pm |
| Coolness: 131830 | ill dig the plans. with your explaination thou it sounds like a cap, but it must be a diode or transistor, since it only leaks at 4 ohm... its definetely this output stage unless its a shifting circuit amp. (ie on switch the input get halved on the channel... )
that could be easyli fix, if your good at soldering, open it up and look for the burned bed. i bet ill be aparent . Update » cutterhead wrote on Thu Nov 6, 2008 @ 5:12pm then test nearby components. do you have a diode tester ? |
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| Good [+1]Toggle ReplyLink» No_Comply replied on Thu Nov 6, 2008 @ 5:37pm |
| Coolness: 85170 | No, but i could just try with the continuity tester on my multimeter. You're probably right though, its an old amp so componants should be relatively easy to isolate and remove/replace. |
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| Good [+1]Toggle ReplyLink» cutterhead replied on Thu Nov 6, 2008 @ 5:54pm |
| Coolness: 131830 | continuity can always work, one side should not conduct and the other should
if you know how to test a transistor with the diode knowlege then you should be all set on this prob. withou getting the model of the trans , 2times 2 pins should conduct, in reverse they shouldnt. if it conduct from all side its prob shorted, but i had issues with that survival trick not being that accurate, you could get a complete tester's solution in can tire, they have lil component testr/multimeter tester under 25$... but they are "relative" not rms, but i did without for almost 10 years. its the day you want to calibrate an oscilloscope and want proper error margin you get a fluke 189 or something. its a shame im not downtown anymore, i would have droped to your place and have a look at it. but really the burn spot should show. or some cold solder, anyways it should be brown a lil on the board. Update » cutterhead wrote on Thu Nov 6, 2008 @ 5:57pm yea i just remembered. since its not an "in circuit component tester" you have to unsolder the part you think is defect. a lil inverstment on an multimeter that does that is an intelligent choice. |
| I'm feeling 4.5kw 240vrms 45a right now.. | |
| Good [+1]Toggle ReplyLink» No_Comply replied on Fri Nov 7, 2008 @ 1:02pm |
| Coolness: 85170 | We'll see how it goes this weekend o0 |
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| Good [+1]Toggle ReplyLink» cutterhead replied on Fri Nov 7, 2008 @ 5:07pm |
| Coolness: 131830 | i haven browsed for your manual yet sorry, but its comming :D Update » cutterhead wrote on Sun Nov 9, 2008 @ 5:45am [ fileshare.eshop.bg ]
here it should link properly to your amps nervous system. you need help repairing it , just ask me , i looked at it and its a type i like to repair. push pull mirror type with loop injection, exactly like my peavey, i dunno if its truly a class "a" you got there but looks like so. my speciality. plus i got the scope for the waveform analysis. Update » cutterhead wrote on Sun Nov 9, 2008 @ 5:45am [ fileshare.eshop.bg ]
here it should link properly to your amps nervous system. you need help repairing it , just ask me , i looked at it and its a type i like to repair. push pull mirror type with loop injection, exactly like my peavey, i dunno if its truly a class "a" you got there but looks like so. my speciality. plus i got the scope for the waveform analysis. Update » cutterhead wrote on Sun Nov 9, 2008 @ 5:46am if for some odd reason the link stop working i keept a copy of the pdf |
| I'm feeling 4.5kw 240vrms 45a right now.. | |
How To Not Wire Speakers Like An Idiot
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