Maxxd.com Forums

The Pioneer DEH-P40MPi 50W MP3 CD Tuner with Aux-in, 2 Pre-Outs
Or
The Sony CDX-GT410 CD Tuner with Front USB & AUX input

Personally im an alpine/panasonic fan though my next headunits gonna be a pioneer with bluetooth-they aint as daft money as you think-mate of mine had one an i were well impressed with the bluetooth.

Have a look here before ya decide on owt,really depends on how many pre outs ya need wether ya need USB input etc etc.

car audio and security.com

pioneer out of the two, but try alpine.

And dave I hope your not buying the one
I'm getting LOL

try & decide what you want it to be able to do. then make your mind up.

If i was to buy 6 x 9 speakers for the parcel shelf, plus a sub and an amp. How would that all connect up in simple terms. So the speakers connect into the amp and then into the headunit, or does the sub connect into the amp and then into the headunit?

Am very confused?

Thanks

why 6x9's if u are putting a sub virtually underneath them?

your head unit would need a pre out so that you can run an rca cable to the amp. the sub is then wired to the amp.
both the speakers and sub can be wired into the amp but this depends on the type of amp you have.

do you have a budget yet? that's a start.

but, as mike said.....
a sub needs to be driven by an amp.
mid-range speakers can be driven off of the headunit or an amp. it all depends on what your budget is.
Personally, i wouldn't go for 6x9s, i'd put a component set i the front instead.

You`d need a 3 or 4 channel amp (1 channel= an output to a speaker)Theres various ways to do it ya could buy 2 seperate amps 1 for the 6x9`s 1 for the sub, or use a 4 channel amp use 2 channels for the 6x9`s then bridge(link sub wires to the 2 remaining channels + of one channel and - of the other (though when ya buy a 4channel amp will describe how to do it in instructions)

As an example say youve got a 4x50w rms amp ,Depending on the amp(and ya battery power)thats generally between 100 and 150watts peak power per channel so ya 6x9`s will roughly be seein 150 each and ya sub 2-300watts as bridging sums the 2 channels into1 this is just to give an idea of how you`d go about it-could be more accurate if i went an had a look its just as a rough guide for ya.

Remember though most decent 4channel amps require 4 channels in to give 4 out so you`d need a headunit with 2 pre outs or splitters- (female rca into 2males)however obviously your amps seeing a poorer quality signal then as its been split.

Headunits with 3 preouts make it easier to run a 4 channel amp and sub amp as theres a dedicated sub level/low pass filter aswell usually for that line out.(basically the point either the high stuffs filtered off or low stuff depending on high or low pass filter-can be on amps aswell as headunits) Though a few amps are now supplied with they`re own level control ya can mount in the front of ya car should ya not have scope for level based on your set up.
Is possible to run 2 amps off of 2 preouts if ya 4channel amp has a non fading line out, this way ya 4 rca plugs off ya 2 rca leads from stereo would plug into ya 4 channel amp then youd buy say a mtr RCA lead to loop round into your sub amp-then use the level control ya sub amp had for altering sub level.
Most flexible headunits though in my opinion are still those with 3pre-outs ie 2 front channels 2 rear channels and 2 sub (1preout=2channels)

You will find if ya listen to the same type of music roughly all the time ya may be able to set the sub crossover at a certain point an leave it,if youve got a wide variety of music tastes a headunit with adjustable lowpass filter "may" be beneficial

Speakers and sub connect to amps or head unit its up to you, mate of mine ran subs straight off of rear channels of a head unit once and sounded suprisingly good (dont really recommend though)-ya could either run 6x9`s off headunit and sub off an amp or run everything of an amp.

Really does depend what wattage amp/speakers ya buy and even how many channel amp in the first place.

Personally having run both components and 6x9`s with subs do think 6x9`s work well with a sub theres certain frequencies where mids in the front unless dynamatted and carpetted inside of doorpanel to stop the rattling wont ever beat the ease of getting good mid bass especially for a novice for a budget price.

In my opinion anyway ya always need 4 speakers and a sub for a good set up be it components 6x9`s whatever i miss the surround otherwise if ya like when just running components in the front.

just an opinion

are you trying to make your car vibrate or are you going for audio quality where all the components compliment the sound you are listening to and produce good quality audio?

In my opinion the best systems are a mixture of both not one or the other.

Have you had a problem with this ever?
I've never know it to be an issue.

Stands to reason its going to be poorer quality-if splitters were the perfect answer why have head units ever got more than one pair of pre-outs splitters are just a way of getting round it if youve got a budget headunit and need 4 inputs into an amp or want to run two seperate amps off one rca lead.

Didnt remember saying i`d had a problem with it,just its a poorer signal.

if we were bothered about loss of quality using splitters we wouldnt use mp3's as an mp3 has already lost audio quality but that loss is never spoken about. Any loss from a splitter generaly reduces the signal strength so the audio level drops right across the band which is then brought back to a level with the gain of the amp. If you are loosing signal quality at variable frequencies then you are using poor quality cable. Unless you go to extreme lengths to normalise your audio and you recognise the difference between very good audio and good audio then you wont see any difference in quality in fact its probaly the same difference as using copper connectors or silver or gold plated. The frequency is too low for stripline theory to take any effect so like i say your left with 1 attribute which is the resistance of poor quality cable.

Most cheap headunits only have 1 set of output rcas because the space the headunit is taking up is already cramped whereas a good headunit tends to have 1 output which is sent to a active crossover elsewhere in the vehicle to split the audio into seperate bands.

You never here the BBC quibling about using splitters and they are renowned for sound and vision quality

Sorry dudes you`ll never convince me splitters are a good thing theyre just for convenience-its not about any audio level its signal quality based on audio signal input ie somethings only as good as what youre putting in ie a shit signal in is an amplified shit signal out-the better quality signal ya put into an amp the better it will be out.

If the quality and strength of pre-out signals aint an issue how come cheaper headunits run a 2v (generally) and top end models usually 3x5V??

By the way youre not seriously comparing the bbc to something put in the average car are ya and then assuming its of the same quality that would just be a piss take.

I think you lot have just confussed the poor lad!