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Head Units / Processors / Car Audio Electronics Discuss anything about head units, processors, and other car audio electronics.

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Old 05-06-2008   #1 (permalink)
 
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I am sadly back. Now I have a question. I know that a 4 V HU are normal, and a 8V HU would be really good. Now my question is if some one gets a 8V HU they have to get an amp for there regular speakers because the HU is "too" powerful. Am I right? Now how much of difference from 0-10 would you notice between a 4V-8V HU?
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Old 05-06-2008   #2 (permalink)
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you can always adjust your hu down
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Old 05-06-2008   #3 (permalink)
 
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Ah, at this point should I go search, or you guys would kindly tell me how.
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Old 05-06-2008   #4 (permalink)
 
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Quote:
Originally Posted by john117 View Post
I am sadly back. Now I have a question. I know that a 4 V HU are normal, and a 8V HU would be really good. Now my question is if some one gets a 8V HU they have to get an amp for there regular speakers because the HU is "too" powerful. Am I right? Now how much of difference from 0-10 would you notice between a 4V-8V HU?
4V to 8V is double the Power equal to a +3db gain.

The volts on the HU have nothing to do with the speakers, unless you use an amp. So your first question is irrelevant and void.
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Old 05-06-2008   #5 (permalink)
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the higher the voltage on the HU preouts generally means its a higher quality signal going to the amps. if your not going to amplifiers, then that voltage means nothing to you. that is for the preouts only.
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Old 05-06-2008   #6 (permalink)
 
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So it would just give me a +3db gain on everything? Would it do anything more?
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Old 05-06-2008   #7 (permalink)
 
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Oh okay. So more clear better sound plus louder. Have I understood well or no there is more?
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Old 05-06-2008   #8 (permalink)
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Normal head units normally won't put out 4v at moderate listening levels. You'll realistically only get that at higher volumes. I'd assume the same of 8v decks.
Although, there were some Eclipses that put out 8v nominally.
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Old 05-07-2008   #9 (permalink)
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It won't make it any louder, because the output voltage is on the RCA, which is only used when using an external amp. Regardless of the output voltage of your HU, you can only set the gain on your amp to put out whatever power at which it is rated. Therefore, the "loudness" will remain the same. The benefit of having a higher voltage preout is so that the gain on your external amplifier(s) can be set much lower to achieve the same output, thus putting less strain on your amp's power supply.
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Old 05-07-2008   #10 (permalink)
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It won't make it any louder, because the output voltage is on the RCA, which is only used when using an external amp. Regardless of the output voltage of your HU, you can only set the gain on your amp to put out whatever power at which it is rated. Therefore, the "loudness" will remain the same. The benefit of having a higher voltage preout is so that the gain on your external amplifier(s) can be set much lower to achieve the same output, thus putting less strain on your amp's power supply.
actually your amp won't have less strain.
say you have a 1500 rms amp, you send it a 4 volt signal and you have the gain set at say 3/4 of the way up, now you send it and 8 volt signal and set it to 1/4 of the way up. your amp is still going to produce 1500 rms.
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You have been warned about this. It has nothing to do with you. Like I said, All you are doing is making matters worse for CASEY !
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is this who you want to buy an alternator from?? think about it.
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Old 05-07-2008   #11 (permalink)
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also be carefull with 8 volt decks, i couldn't turn the gain down far enough on my sub amp with my eclipse deck and had to use one rca.
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Dear almond,
You have received an infraction at Realm of Excursion: Forum.
Reason: Product Spamming or Pushing
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You have been warned about this. It has nothing to do with you. Like I said, All you are doing is making matters worse for CASEY !
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is this who you want to buy an alternator from?? think about it.
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Old 05-07-2008   #12 (permalink)
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Quote:
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actually your amp won't have less strain.
say you have a 1500 rms amp, you send it a 4 volt signal and you have the gain set at say 3/4 of the way up, now you send it and 8 volt signal and set it to 1/4 of the way up. your amp is still going to produce 1500 rms.
Right, but if you're already starting with 4 volts as opposed to 2 volts or less, that's less amplification that needs to occur to achieve the same amount of power, thus less strain on the amp. If it didn't produce less strain on the amp, there would be absolutely no reason for higher voltage preouts.
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Old 05-07-2008   #13 (permalink)
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no. it will not lessen the strain. period. the amp doesn't use power from the h/u to amplifie it to get it's own power.

the best way i think i can explain it is when you crank the gain you amplify external noise that can get into the amp, I.E. alt whine. when the gain is lower the externalnoise is amped less and there fore the sound is cleaner and high volt preouts are doing their job of noise reduction.


the gain is used to match the preout voltage, but go somewhere and find me a formula where the preout voltage is used to calculate power output.


you won't be able to because the preout voltage has no bearing on the power out put of the amp. someone will be able to better explain it than me though. i have a bad way with words.
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Dear almond,
You have received an infraction at Realm of Excursion: Forum.
Reason: Product Spamming or Pushing
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You have been warned about this. It has nothing to do with you. Like I said, All you are doing is making matters worse for CASEY !
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is this who you want to buy an alternator from?? think about it.
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Old 05-07-2008   #14 (permalink)
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Hmm. Okay, so apparently I was sadly mistaken. Can anyone else confirm this? I'm not saying I think you're not correct, I just want someone to confirm it.


If the amplifier doesn't use the voltage from the preouts, then why would the gain be set LOWER for higher preout voltage? Because that's less amplification it has to do, so I stilld don't see how I was incorrect, but please enlighten me. After all, one of the main reasons I joined the ROE community was to learn as much as possible.
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Old 05-07-2008   #15 (permalink)
 
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I am also looking forward on getting the 7___ ( the 8V head unit from eclipse) don't worry I am going to call eclipse and ask. But keep the comments coming.
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Old 05-07-2008   #16 (permalink)
 
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I just talked to technical serves from ecilpse and HE said you only get more clear sound. So just less noise.
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Old 05-07-2008   #17 (permalink)
 
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Ok, does anybudy work for circut city? IF you do PM me. and the 7200 has "Total Harmonic Distortion 0.008%" that is F#CKING amazing.They said is $700. So holy SH!T.
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Old 05-07-2008   #18 (permalink)
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they're all over online for about $350 to 400 ish
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Dear almond,
You have received an infraction at Realm of Excursion: Forum.
Reason: Product Spamming or Pushing
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You have been warned about this. It has nothing to do with you. Like I said, All you are doing is making matters worse for CASEY !
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is this who you want to buy an alternator from?? think about it.
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Old 05-08-2008   #19 (permalink)
 
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Well, I guess I got to do some searching don't I! Hey if you have couple of websites that have it for 350 let me now PLEASE. Thanks
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Old 05-08-2008   #20 (permalink)
 
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You can't find that head unit brand new for $350, but here is a cheaper site that has it in stock. The 7100 and 7200 models...

http://www.woofersetc.com/index.cfm?...roduct_ID=5434

http://www.woofersetc.com/index.cfm?...roduct_ID=6576
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Old 05-08-2008   #21 (permalink)
 
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The bad part is that I have to pay $70, to buy an ipod connector. I am not a big fan of ipod, but the 160Gb is very nice.
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The bad part is that I have to pay $70, to buy an ipod connector. I am not a big fan of ipod, but the 160Gb is very nice.
You don't need an ipod adapter. The usb port plays ipods as well, as long as it has a 2.0 plug.
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Old 05-08-2008   #23 (permalink)
 
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Does anybody else have anything else to say. Does anybody disagree or believe there is more than just good sound? Or not. Also let me know if you work at circuit city.
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Old 05-09-2008   #24 (permalink)
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you're right $450 ish is the best i've found as well
http://www.forum.realmofexcursion.co...ghlight=cd7200
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Originally Posted by Excessive Amperage
Dear almond,
You have received an infraction at Realm of Excursion: Forum.
Reason: Product Spamming or Pushing
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You have been warned about this. It has nothing to do with you. Like I said, All you are doing is making matters worse for CASEY !
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is this who you want to buy an alternator from?? think about it.
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Old 05-09-2008   #25 (permalink)
 
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I knew Circuit city gets for a lot more cheaper. GUYS TRUST ME I WORK FOR BEST BUY COMPANIES MAKE SH!T LOAD OF MONEY ON SPEAKERS, HU, AMPS, ... A $800 SUB THEY ARE PROBABLY MAKING $370-$500 ON THEM EACH. I KNOW!
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