Does Output Voltage Matter?????

[Depression 10+ year member]

Again..I am new and trying to pick up all I can from you guys and gals on building a good system for my Truck.

One thing I have noticed that goes against what I thought was "CRUCIAL" Is that some of the elaborate systems on this site have head units with Low pre-amp output voltage. I was led to believe this was important for amplified systems. Yet I have seen a few system configurations with trick amps,woofers etc..but with head sets that are less than $200 and 2V output voltage.

Can someone educate me on the importance or lack of importance for a Head unit to have high output voltage if being utilized in a amplified set up!!

I am just kinda floored to see $3000 systems run by $150 head sets on some of these rides??

Thanks

Don

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[Wonderbread 5,000+ posts]

Headunits can be some of the most overlooked aspects of a system... a higher preout voltage will let your amp work easier for the same power... less gain = less distortion, cleaner signals, and the possibility for maximum power...

go with something around 4v or higher...

 

[bumpin_blazer 5,000+ posts]

that or get a line driver to boost voltage signal to 8volts or so. i know i plan of getting a line driver to boos my voltage to about 10volts rms when i get my p1r. if you think about it thought 4v is really all many people need unless you compete b/c even the highest of Alpine units come with 4v. that's 1 reason i really don't like em i want at least 6volt pre-outs.

adam

 

[maylar 10+ year member]

Preout voltage wouldn't be high on my selection criteria for a HU. As you said, there are lots of quality systems out there using 2 volt decks.

It's been standard for companies to put 4V preouts on their better quality decks. But lately it seems that there are more decks with 4V preouts now than anything else. That's the max voltage that simple circuits can produce from a 12v source without going to complicated circuitry. I wouldn't buy another 2V unit only because it's likely to be an obsolete design.

 

[defiance 10+ year member]

It's certainly not critical - and as a clarification, the amp only 'works harder' in the preamp stage, so it doesn't create more heat or use more amperage - the effects YOU see are simply that lower voltage limits your signal/noise ratio. 'noise' induced into the signal lines is pretty minor even in comparison to 2v, but it's much less significant in comparison to 4v.

Increases in voltage mattered a lot more back when 150mV was on some heads!

 

[Depression 10+ year member]

Thanks, The reason I mention this is because I plan on getting the Pioneer 7500 for my truck ( only thing I am sure of so far). YET! I see alot of guys with the 6400...which was what I would get but was told not to because it only has 2V output voltage..BUT HEY...without kissing ***...I am glad I got onto this site..I have learned more in 24 hours than the last year for my system planning.

 

[Depression 10+ year member]

SWEET!!!...Thanks AGAIN!!! JMAC,,,LOOKS GOOD..Same Price...What the "F" is the diffrence between these 7500MP...6500MP and the 750MP and 650MP's..I am confused on this???

 

[Depression 10+ year member]

The 750 still has all the same features as the 7500 right???(display etc)..if so which I assume it would, I'm sold on it..already saw one for $258.00 (well within my budget)..and 6.5VOLTS! output Voltage....why would I not go for the 750 instead??

still wanna hear more opinions on this though...I have to believe pre-amp voltage is more important than some "wanna" think.. I ain't saying it makes your whole system...but it always seems to be a crucial aspect on many a high price head unit?????and I can't believe it matters so little????

I'm "NO" expert..but it's gotta be more than a useless stat made to sell people on more expensive head units

 

[pope 10+ year member]

is the change from 4v to 6v significant enough to base a decision on?

-debating whether to get premier 740 or 750

i like the blue oel display on the 740 better

 

[maylar 10+ year member]

is the change from 4v to 6v significant enough to base a decision on?

I'd say no.