TV pre-out volts

JL Man · Post by **JL Man** » Fri Mar 31, 2006 1:16 am

I got an Eclipse CD8445 with 8V pre-outs, and i had went into mobile one to trade it in for an in-dash tv, but the guy at mobile one (i've been goin to him for a lil under 3 years now) said that i should stick with my eclipse because of the pre-outs and sq. do y'all know of any tvs with 5 or more, if they make more, volts?

thanks

. . i don't really want navigation . .

Post by **GlassWolf** » Fri Mar 31, 2006 3:28 am

why do you need 8V inputs for a TV?
the video screen is video.
the audio pre-outs of the eclipse should be going to amplifiers.

smoker · Post by **smoker** » Fri Mar 31, 2006 3:40 am

typically dvd heads have less voltage.....if you must have both video and high voltage look into a line driver

JL Man · Post by **JL Man** » Fri Mar 31, 2006 3:42 am

GlassWolf wrote:why do you need 8V inputs for a TV?
the video screen is video.
the audio pre-outs of the eclipse should be going to amplifiers.

umm, i guess i don't, i went to mobile one to trade my eclipse for a pioneer 5700 touch-screen and he said don't do it because my comps and subs won't be as loud because i will be dropping from 8 volt to 2 volt . . . .

Post by **GlassWolf** » Fri Mar 31, 2006 3:55 am

he's an idiot.
pre-out voltage has NOTHING to do with system volume.
all it affects is signal resolution (how clean or detailed the signal is when it reaches the amplifier.)

2V works just fine. If the system is ANY quieter, it's because your installer(s) don't know how to adjust amplifier input sensitivity (gain) properly.

the gain setting is there specifically to balance the input stage of the amp to whatever the head unit's line voltage is.

welcome to basic car audio 101.

JL Man · Post by **JL Man** » Fri Mar 31, 2006 3:59 am

GlassWolf wrote:he's an idiot.
pre-out voltage has NOTHING to do with system volume.
all it affects is signal resolution (how clean or detailed the signal is when it reaches the amplifier.)
2V works just fine. If the system is ANY quieter, it's because your installer(s) don't know how to adjust amplifier input sensitivity (gain) properly.
the gain setting is there specifically to balance the input stage of the amp to whatever the head unit's line voltage is.
welcome to basic car audio 101.

wow i was told the exact opposite from a "expert salesman", i'm in class with my notebook ready for notes

. . thanks for the info . . back to dvd players tho, i really would like on, i'm looking at a jensen vm9510ts, because my friend has the 9410 and the picture is good and well it cheap . . good choice?

Post by **GlassWolf** » Fri Mar 31, 2006 4:04 am

unless you want the flip up screen (as opposed to mounting a separate larger screen, which I prefer for reliability) I'd lok at that JVC unit Justin just got. It's pretty sweet, and cheap, too!

Tell ya what. Take a look at http://www.bcae1.com and find the section explaining pre-out voltages, or amplifiers. It'll detail exactly how the gain works (sections on gain setting are there too) and if it helps any, your expert salesman is being trumped by a certified master installer and electrical engineer with 15+ years of experience.. for what it's worth.

JL Man · Post by **JL Man** » Fri Mar 31, 2006 4:07 am

GlassWolf wrote:unless you want the flip up screen (as opposed to mounting a separate larger screen, which I prefer for reliability) I'd lok at that JVC unit Justin just got. It's pretty sweet, and cheap, too!
Tell ya what. Take a look at http://www.bcae1.com and find the section explaining pre-out voltages, or amplifiers. It'll detail exactly how the gain works (sections on gain setting are there too) and if it helps any, your expert salesman is being trumped by a certified master installer and electrical engineer with 15+ years of experience.. for what it's worth.

lol, nice . . while i have you here answering me, i just bought a new box for my 10's (pre-fab

) but i needed one bad . . it has 1.3 cubic feet per chamber, the subs call for 1.125, shouldn't be a big deal huh?

thanks for the website, i'm always looking to expand my knowledge!!! :happy055:

Post by **GlassWolf** » Fri Mar 31, 2006 4:33 am

not after you figure in the displacement of the sub itself, which will take up room in the box.

JeremyC · Post by **JeremyC** » Fri Mar 31, 2006 4:34 am

JL Man wrote: i just bought a new box for my 10's (pre-fab ) but i needed one bad . . it has 1.3 cubic feet per chamber, the subs call for 1.125, shouldn't be a big deal huh?

No thats not to bad, but you could always add in some extra bracing, to beef up the box (might need it since its a prefab) and make the internals smaller.

EDIT............Thanks glass, that part skipped my mind.