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View Full Version : Does the h.u really give better s.q



FOSGATE JOE
08-28-2005, 09:57 PM
ok guys i see jmac make a thead about h.u so that got me thinking about sq in h.u does it really matter if you use a cheap one(alpine9821 )if you got good caraudio stuff like e.q crossover and r.f amps .subs and alpine type r comps my c.d player is the ///alpine 9821 so if i buy a new better deck will it sound any better or not really ------i

BassManB
08-28-2005, 10:02 PM
not to the common ear.... lol i dont no... ive wondered this several times and couldnt figure it out

azbass
08-28-2005, 10:07 PM
a deck with dual 24bit sampling and burr brown will walk over any cheepo deck.

Rattlebrain
08-28-2005, 10:11 PM
Well I had a cheap Pioneer DEH-1400. It sounded OK but the Clarion I'm using now, (in my sig) sounds twice as good. If that helps any.

DIPayton
08-28-2005, 10:17 PM
the only sound difference that I noticed when making a switch from a bottom of the line JVC unit to the Pioneer one I have is I get no more skipping. No actual music difference to me. But some say they would be able to hear a difference.

DBfan187
08-28-2005, 10:18 PM
me neither, but always keep my HU set flat and just use the preouts.

anthongy817
08-29-2005, 12:35 AM
i dont think the difference in hu will give out a better sq...but one might offer more functions for you to fine tune the sound...which would then be better sq. And another is for quality parts as well..

cjjackson85
08-29-2005, 12:40 AM
My DRZ9255 pwns joo all...

[/story]

adam71
08-29-2005, 07:07 AM
My DRZ9255 pwns joo all...

[/story]

Well......not ALL of us.;)

JLCivic
08-29-2005, 07:11 AM
I have heard differences among head units so yes, they can make a difference, imo.

supa_c
08-29-2005, 07:18 AM
Well......not ALL of us.;)
muahahahaha !!!!!!!
External EQ will prob make somewhat of a difference if you added it onto a cheap-o H/U

blue
08-29-2005, 01:22 PM
Without a doubt .... But it hugely depends on the system supporting it. The higher quality your amps , spkrs , ect are , the more differences you will hear between HU's. If your entire system is competition quality , then a HU swap will be VERY noticible , if you have a decent system , but not really what you'd call " high end " you won't really notice that much.
HTH

FOSGATE JOE
08-29-2005, 01:36 PM
My DRZ9255 pwns joo all...

[/story]whats that say^^^^^????????

6three6mafia6
08-29-2005, 01:38 PM
i had a mid level panasonic, i upgraded to a clarion 745mp with the 24bit DA converters and out of ALL the upgrades, high end speakers, high end amps, blah blah blah, upgrading the head unit was the MOST noticible upgrade i ever did.

FOSGATE JOE
08-29-2005, 01:46 PM
hmm i guess i should look at the 24 bit stuff thanks for the 411:)

supa_c
08-29-2005, 02:12 PM
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
08-29-2005, 06:36 PM
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
08-29-2005, 06:59 PM
:word:

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).:)

99StangGt
08-29-2005, 07:12 PM
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
08-29-2005, 07:17 PM
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
08-29-2005, 07:49 PM
a 2v to 5 volt jump is still very noticable

squeak9798
08-29-2005, 07:52 PM
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
08-29-2005, 07:52 PM
meh

supa_c
08-29-2005, 08:04 PM
Like as i previously posted
Went from a 2V preout to a 6.5V preout.
I could definetly tell a difference.

adam71
08-29-2005, 08:10 PM
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.:crazy:

jujumantb
08-29-2005, 08:11 PM
Like as i previously posted
Went 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
08-29-2005, 08:24 PM
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
08-29-2005, 08:27 PM
Like as i previously posted
Went 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
08-29-2005, 08:27 PM
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
08-29-2005, 08:35 PM
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 ;)

LBX2G
08-29-2005, 08:49 PM
I mean if u want to get real. All this stuff can be corrected with other aftermarket equipment like external EQ's, Crossovers, processors, and other things. I mean if have like $1200 u could get an jensen and make it sound like an dennon, with other aftermarket products added on to it.

supa_c
08-30-2005, 02:51 AM
I dont think a $100 Jensen will ever sound like a $3500 Dennon

3.5Max6spd
08-30-2005, 08:44 AM
I set my gain by eye...you know that ;)

Try setting it by ear sometime....;)

99StangGt
08-30-2005, 11:46 AM
what i was talking about with noise issues wasnt meant for the voltage but the higher end decks. most higher decks do have 4v or higher outputs.

3.5Max6spd
08-30-2005, 12:16 PM
what i was talking about with noise issues wasnt meant for the voltage but the higher end decks. most higher decks do have 4v or higher outputs.

higher voltage allows a hotter signal over the run of the patch cables-
hotter signal leads to lower gain settings, amp doesnt fight for signal to make rated power

if you are inferring that high voltage alone reduces noise, you are wrong. Its done collectively with gain setting. If anything has to do with signal induced noise from the HU it would be the output impedance of the preouts, which affects the purity of signal tranfer- the lower, the better- not the voltage itself...

3.5Max6spd
08-30-2005, 12:24 PM
nothing in a HU itself pinpointed is liable for SQ....its a collective chain of components and how they are put together. Build quality is not always a determinant- Nak hu's are notorious for serene SQ, but not quite put together the best- they have mediocre QC history..

supa_c
08-30-2005, 02:04 PM
Try setting it by ear sometime....;) 1. It was a joke
2. I do set it by ear
3. Using a DMM to set it gave to much output at to little volume....
On 14/40 it gets plenty loud.
And to comment on the low ohm preouts, why do you think Eclipse always adds " low 55ohm preouts" to their features.
Most companies dont have that low

3.5Max6spd
08-30-2005, 03:28 PM
1. It was a joke
2. I do set it by ear
3. Using a DMM to set it gave to much output at to little volume....
On 14/40 it gets plenty loud.

lol , i was joking too....i figured i'd capitalize on your choice of words...hehe




And to comment on the low ohm preouts, why do you think Eclipse always adds " low 55ohm preouts" to their features.
Most companies dont have that low

Because its note worthy. They are not half as s preouts, they are high voltage AND low impedance . Check most of the revered , pricier Sq decks around.... naks(4v/55ohm), Denon's (50hm), RF 9240 (8v/50ohm)drz9255 (4v/55ohm), Sony ES....its not a cheap thing to add to your everyday decks.

Trust me most companies dont want you to look for their impedance specs on their decks...

Silver
08-30-2005, 04:07 PM
Dude, 3.5max 6-spd owned this thread.


Good job explaining.

supa_c
08-30-2005, 09:05 PM
lol , i was joking too....i figured i'd capitalize on your choice of words...hehe




Because its note worthy. They are not half as s preouts, they are high voltage AND low impedance . Check most of the revered , pricier Sq decks around.... naks(4v/55ohm), Denon's (50hm), RF 9240 (8v/50ohm)drz9255 (4v/55ohm), Sony ES....its not a cheap thing to add to your everyday decks.

Trust me most companies dont want you to look for their impedance specs on their decks...
I dont know you well enough to tell if you are joking or not.
At least pioneer lists the ohm of their preouts on most of the H/U's they make
6.5V 100ohm