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Car Forum / Driving, Maintenance, Tuning / Car Audio / March 2004Older 2 volt maximum Amplifier gains with newer 4 volt preout head units
Can any one tell me if there is any problem using older ampliers that have adjustment range of only 0.1 volt to 2 volts on the gains with a newer head unit that has 4 volt preouts? There's no problem.  SignatureMark remove "remove" and "spam" to reply > Can any one tell me if there is any problem using older ampliers that have > adjustment range of only 0.1 volt to 2 volts on the gains with a newer head > unit that has 4 volt preouts? > Can any one tell me if there is any problem using older ampliers that have > adjustment range of only 0.1 volt to 2 volts on the gains with a newer head > unit that has 4 volt preouts? It won't be a BIG problem, but you won't be able to the enjoy the extended headroom that 4v provides. ~John Dziurlaj > > Can any one tell me if there is any problem using older ampliers that have > > adjustment range of only 0.1 volt to 2 volts on the gains with a newer head > > unit that has 4 volt preouts? > > It won't be a BIG problem, but you won't be able to the enjoy the > extended headroom that 4v provides. A 4v signal doesn't provide extended headroom. Perhaps you meant something else? >>>Can any one tell me if there is any problem using older ampliers that > [quoted text clipped - 11 lines] > A 4v signal doesn't provide extended headroom. Perhaps you meant something > else? Hi, Maybe S/N ratio? Tony 4V doesnt add any headroom! Adjusting the gains properly at the amp will probably turn the volts down below 2 volts anyway by the time it reaches the actual amp circuirty (not circuitry in the amp but circuitry in the amp that actually amplifies) http://www.installer.com/tech/gains.html http://www.installer.com/tech/preamp.html Eddie > > Can any one tell me if there is any problem using older ampliers that have > > adjustment range of only 0.1 volt to 2 volts on the gains with a newer head [quoted text clipped - 4 lines] > > ~John Dziurlaj Thanks Guys Just wanted to know if I was gonna fry my older Alpine amps or not. > Can any one tell me if there is any problem using older ampliers that have > adjustment range of only 0.1 volt to 2 volts on the gains with a newer head > unit that has 4 volt preouts? > Thanks Guys > Just wanted to know if I was gonna fry my older Alpine amps or not. Hell no. I've run stock headunits into preamps before. The "input gain" adjustment is a very large resistor, and when you have the gains down they have a far higher input impedence than any speakers. Signaturethelizman "I didn't steal the FAQ either" Before you ask a question, check the FAQs for this newsgroup at http://www.mobileaudio.com/rac-faq. It contains over a decade and a half of knowledge. teamROCS Car Audio Forums http://www.teamrocs.com/caraudio/ teamROCS Car Audio News http://www.teamrocs.com/news/ "It's about the music, stupid" This post is Copyright (C) 2004. Reproduction of its content anywhere other than usenet without the express written permission of the author is forbidden. Thanks. This is not a stock head unit. Its a late model Alpine CD with 3 pre outs @ 4 volt Yes, I HAVE READ that FAQ many times. Specific information on the the subject of Amplier gains adjustment seem to be a subject of much hearsay, and little factual information. This site also has some good information. http://www.bcae1.com/ Some othergood sites including your site http://www.crutchfieldadvisor.com/ISEO-rgbtcspd/learningcenter/car/amplifiers_fa q.html http://www.teamrocs.com/caraudio/ http://www.caraudiomag.com/ http://www.caraudioheaven.com/ http://www.carstereo.com/forum/ http://www.installdr.com/TechDocs/999002.pdf http://www.tpub.com/neets/book7/25e.htm http://www.realcaraudio.com/ http://www.installer.com/tech/ > > Thanks Guys > > Just wanted to know if I was gonna fry my older Alpine amps or not. > > Hell no. I've run stock headunits into preamps before. The "input gain" > adjustment is a very large resistor, and when you have the gains down > they have a far higher input impedence than any speakers. Uhh.. I think that would create a small problem How do you know its 2 volt max does it state i - PunkMarty ----------------------------------------------------------------------- CarAudioForum.com - Usenet Gateway w/over one million posts online View this thread: http://www.caraudioforum.com/showthread.php?threadid=18216 Yes the old school 3533 and 3525 Alpine amps I have show 0.1 volt through to 2.0 volts on the labeling for the gains. > Uhh.. > [quoted text clipped - 5 lines] > CarAudioForum.com - Usenet Gateway w/over one million posts online! > View this thread: http://www.caraudioforum.com/showthread.php?threadid=182166 > Uhh.. > > I think that would create a small problem > How do you know its 2 volt max does it state it OK ... so you think it will create a small problem ... Why? Are you certain it won't be a medium size problem? |
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