Does the h.u really give better s.q

[supa_c 5,000+ posts]

Going from a lower end unit pioneer (4700) to a top of the line preimer (940mp) made such a difference in sound.

The components sounded so much nicer with the eq eq'd and the t/a set.

Not to mention adjustable sub volume

 

[JLCivic 10+ year member]

hmm i guess i should look at the 24 bit stuff thanks for the 411

Higher bit dacs are no guarantee of better sound though.

 

[JLCivic 10+ year member]

//content.invisioncic.com/y282845/emoticons/word.gif.64b12e39f936af3b4fff38a1c0bd0244.gif
You can't just look at one aspect and assume it'll sound better ...

Yep, as i have mentioned before, I have heard a $250 dual 1 bit eclipse sound better than a $400 24 bit clarion. There is just more to it than the dacs used(obviously).//content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[99StangGt 10+ year member]

The higher volt pre amp is a better thing in the higher end HU. Going from the standard 2v to say 5 or 8 volt is a big difference and the amount of noise is less in the higher HU

 

[squeak9798 5,000+ posts]

The higher volt pre amp is a better thing in the higher end HU. Going from the standard 2v to say 5 or 8 volt is a big difference and the amount of noise is less in the higher HU

False. If no noise is audible with the 2V unit, going to 8V isn't going to change anything.

Having low preout impedance is more important than preout voltage

 

[azbass 5,000+ posts]

a 2v to 5 volt jump is still very noticable

 

[squeak9798 5,000+ posts]

a 2v to 5 volt jump is still very noticable

Not if you readjust the gains properly. That's what the gain is there for. If there was some sort of difference with a properly adjusted gain....then you are mistakenly attributing the difference to the increase in preout voltage, when it's actually something else.

PS: I just went from 2V to 8V. No difference, as expected

 

[azbass 5,000+ posts]

meh

 

[supa_c 5,000+ posts]

Like as i previously posted

Went from a 2V preout to a 6.5V preout.

I could definetly tell a difference.

 

[adam71 5,000+ posts]

muahahahaha !!!!!!!External EQ will prob make somewhat of a difference if you added it onto a cheap-o H/U

Correct. I will say that 9255 is a slightly nicer head unit than the P9....no arguing that but when you combine the P9 with the DEQ-P9 I believe that puts the P9 combo a little over. Just my opinion though.//content.invisioncic.com/y282845/emoticons/crazy.gif.c13912c32de98515d3142759a824dae7.gif

 

[jujumantb 10+ year member]

Like as i previously postedWent from a 2V preout to a 6.5V preout.

I could definetly tell a difference.

The only thing you could notice less induced noise, lower voltage is actually better for transfering, then amplifying a signal if you wanna get really technical (I can look for the huge rightup if you want), but like most things, its a tradeoff between a perfect signal and rejection of noise, in car audio, a higher voltage is considered better because noise is a big issue in the car environment.

 

[jujumantb 10+ year member]

On the same note, I'd like to bring up psychoacoustics for a second. Dont underestimate it... I myself have been a victim with this very same preout voltage issue. My deck had 2v outs and I had lots of alt whine. zeb had some nice line drivers for very cheap so I picked one up to see if it would get rid of my noise. This was before I knew facts about preout voltage.. like some of you, I also thought higher voltage meant better SQ. After installing it, my noise was all gone, but I also swore up and down the sound seemed "tighter", it was something I couldnt explain but it sounded better to me. Over a year later I was redoing my trunk and had the linedriver bypassed and totally forgot about it... NO change in sound. I have it hooked back up now but doing some simple a/b testing there is not the difference I claimed when I first put it in, expecting better SQ. Its really important to understand this stuff, your mind is extremely powerful and can hear what you want to hear and not always what is really there.

 

[squeak9798 5,000+ posts]

Like as i previously postedWent from a 2V preout to a 6.5V preout.

I could definetly tell a difference.

You noticed a difference in something. Doesn't mean you can automatically attribute it to the preout voltage (unless you incorrectly readjusted your gain).

 

[JLCivic 10+ year member]

The only thing you could notice less induced noise, lower voltage is actually better for transfering, then amplifying a signal if you wanna get really technical (I can look for the huge rightup if you want), but like most things, its a tradeoff between a perfect signal and rejection of noise, in car audio, a higher voltage is considered better because noise is a big issue in the car environment.

...or the difference he heard had nothing to do with the pre out voltage(the deck with higher pre out voltage also just happened to sound better to his ears even with gains readjusted). Just throwing out the possibility.

 

[supa_c 5,000+ posts]

You noticed a difference in something. Doesn't mean you can automatically attribute it to the preout voltage (unless you incorrectly readjusted your gain).

True

The 4700 has a very poor 3 band EQ while the 940mp has a 13 band EQ.

I rea lly had to crank the gains to get decient output with the 4700 and even still it didnt sound right.

I set my gain by eye...you know that //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif