HU's with DC-DC converter x hu's without it..

[Slaugh 10+ year member]

hi, i want to know exactly what does that small box attached to the back of some HU's do. I know it's a DC-DC converter and has something to do with RCAs or some sht... how does it work? does a hu with it has improved SQ from it? i realized the best sq hus have it, even thou i noticed alpine 9815, for example, doesn't have it, while 9835 has.. that's weird, considering they should be the same hu after all

9815

9835

so... does it do something or what?

Click to read more...

 

[duece212 5,000+ posts]

Had one of those on one of my panasonic decks too...no idea what it does except being a pita and taking up more room behind the dash

 

[Raven 10+ year member]

If it's a straight DC-DC converter, it probably converts 12vdc to something higher so the amp itself draws less current and produces less heat. Either that or a few strategically laid capacitors to provide power conditioning.

Honestly I don't know, I'm just speculating.

 

[Slaugh 10+ year member]

thanks anyway

more help? i really want to know

 

[pwnt by pat 10+ year member]

my 9860 has one. It converts a small digital signal plug to either toslink or another kind of digital cable to use less space directly behind the radio.

 

[bballrrt06 10+ year member]

i dont think the one on your 9860 is the same that he's talking about.. the 9855 had one too, i was under the impression it had to do with the rcas as well. possibly converting 12v to 4v pre-outs? i don't know i could just be sounding like an idiot.

 

[Slaugh 10+ year member]

some of the best sounding head units out there have it.. it must be some good shit yo //content.invisioncic.com/y282845/emoticons/naughty.gif.94359f346c0f1259df8038d60b41863e.gif

Alpine CDA-7998

Eclipse cd8454

Alpine CDA-7878

Alpine CDA-7995

 

[bdawson72 5,000+ posts]

i didnt even kno that the eclipses had them....what was i paying attention to when it was installed

 

[Slaugh 10+ year member]

anyone has the answer?

 

[yacob.naif 10+ year member]

i would imagine they just relocate the voltage converter to the external box to lessen noise?

 

[Slaugh 10+ year member]

i would imagine they just relocate the voltage converter to the external box to lessen noise?

nope... some players have it, while others, don't...

look at these pictures

7998

9815 (no converter)

notice also that the converter is meant for the preouts... any idea, anyone?

 

[yacob.naif 10+ year member]

it's a voltage regulator for the cd transports

it runs high ampere, low voltage for less noise

and again, i imagine it's external for the same reason, to lessen interference

alpine says specifically to keep it away from the antenna and pre-outs

 

[Slaugh 10+ year member]

ne1

 

[willisweed 10+ year member]

hi, i want to know exactly what does that small box attached to the back of some HU's do. I know it's a DC-DC converter and has something to do with RCAs or some sht... how does it work? does a hu with it has improved SQ from it? i realized the best sq hus have it, even thou i noticed alpine 9815, for example, doesn't have it, while 9835 has.. that's weird, considering they should be the same hu after all

i have the 9815 and mine has it....do you have a 9815 and it doesnt have it or were you just going off of what you heard?

 

[Slaugh 10+ year member]

sorry dude, but the 9815 doesn't have it... can you supply us with a pic that shows it?