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Trying to run a HU in a house

Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=67006
Printed Date: May 03, 2024 at 3:36 AM


Topic: Trying to run a HU in a house

Posted By: youngone
Subject: Trying to run a HU in a house
Date Posted: November 25, 2005 at 5:44 PM

Hey guys and gals I'm trying to run deck in my house. I would like to figure out the best way to do this. Should i use a ac/dc converter to supply it with power. The deck I'm trying to do this with is a Alpine CDA-9851.

The installation guide or the insulation recommendation say to put a 10amp fuse on the power wire. I know i have to put a fuse on my power wire going to it but is this the amount of power it takes to run the HU.
Do i get a converter that is able to put out 10amps.

Do the shops that display there decks use a power converter to run them. What is the best way to do this thanks in advance.posted_image

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Want to know some good equipment- JL,Adire Audio,Mcintosh,Brax,Helix,Eclipse,JBL,RE,Dimoand Audio,Zapco, pritty much anything DYhon,Forbidden recommend
On the12volt you give some info and you get in



Replies:

Posted By: dwarren
Date Posted: November 25, 2005 at 5:52 PM

Why are you trying to do this? I hate to shoot you down but this is a real waste of time and money. Get a real in home receiver.

There's been a few past threads with people trying to do the same thing, but most never followed through. Search in the gen or misc forums.



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Posted By: audiobhan101
Date Posted: November 26, 2005 at 12:11 AM
OK im pretty sure every house has about 15-30amps coming from the out let and a converter works by stepping down the voltage through a transformer.
the equation you want to look at is V=IR.
lets say you have a 120 volt outlet.
and its at 15amps. all you gotta do is add 12ohms of resistance to bring that amperage down to 10amps and then use a fuse to prevent any spikes or surges from getting through.

its prolly gonna be very complex ur better off to do as dwarren said and just buy a home unit.

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84 Mazda Rx7 GS
4 15" Audiobahn High Excursion
1 2500W Orion Amp
Custom Box




Posted By: haemphyst
Date Posted: November 26, 2005 at 2:25 AM
audiobhan101 wrote:

OK im pretty sure every house has about 15-30amps coming from the out let and a converter works by stepping down the voltage through a transformer.
the equation you want to look at is V=IR.
lets say you have a 120 volt outlet.
and its at 15amps. all you gotta do is add 12ohms of resistance to bring that amperage down to 10amps and then use a fuse to prevent any spikes or surges from getting through.

its prolly gonna be very complex ur better off to do as dwarren said and just buy a home unit.

And that is VERY WRONG and VERY DANGEROUS information, and WILL cause somebody to destroy a component if they follow it, and possibly electrocute themselves in the process. A house uses AC, a car provides DC. You need a POWER SUPPLY, something that converts high voltage AC to lower voltage, higher current DC. This involves a transformer, (NOT a resistor) capacitors, diodes, and in a regulated version, trasistors. Yours was VERY bad advice, indeed!

Also, the deck will pull UP TO 10 amps, anything beyond that, and the fuse will blow, BUT I recommend you purchase a power supply that will provide at least 15A of current, so as to prevent voltage sags.

I recommend this one as a minimum for a cassette or CD deck. This one will power a VERY SMALL amplifier as well (maybe 50wpc), although not to full output continuously.

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It all reminds me of something that Moličre once said to Guy de Maupassant at a café in Vienna: "That's nice. You should write it down."




Posted By: stevdart
Date Posted: November 26, 2005 at 3:45 PM
audiohhan, I hope youngone didn't follow your advice.  And I hope YOU don't follow your advice.  It might be a good idea if 12volt can make some kind of overlaying warning, like "AARRGGHHH!!! BAD ADVICE!!!" to superimpose over posts like that.  I know I've made a couple of bad advice posts over the years that could have used this warning!  Have a cup of coffee and think about it...

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Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.




Posted By: Alpine Guy
Date Posted: November 26, 2005 at 4:16 PM

You can sell that alpine on e-bay and buy a nice home amplifer for the same price, plus it most likely will be a better quality signal.



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2003 Chevy Avalanche,Eclipse CD7000,Morel Elate 5,Adire Extremis,Alpine PDX-4.150, 15" TC-3000, 2 Alpine PDX-1.1000, 470Amp HO Alt.




Posted By: audiobhan101
Date Posted: November 26, 2005 at 6:54 PM
lol ok no more home wiring advice for me but maybe you guys saw that the wrong way.

I didnt just say to put a resistor and call it a day i meant buy a converter and the converter steps down the voltage through resistance.

ull notice i said step down through a transformer not through resistance. the transformer just uses resistance to accomplish the step down.

sorry for the confusion.

-------------
84 Mazda Rx7 GS
4 15" Audiobahn High Excursion
1 2500W Orion Amp
Custom Box




Posted By: stevdart
Date Posted: November 26, 2005 at 10:29 PM

Ok, I see that now.  Sorry 'bout that!  posted_image



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Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.




Posted By: fingaz22
Date Posted: November 26, 2005 at 11:08 PM

haemphyst hit it right on the head. a power supply is the best way. digi key sells a few different types and sizes. i just upgraded one for my home workshop to repair eletronic's mostly car audio and even though i spent over a 100 bucks, i got one that will provide me with enough juice to run aournd a 200 watt rms system and it has a varible voltage from 5 to 15 volts. but radio shack has smaller ones for less than 40 bucks and lows as 20 bucks.

if your trying to do this for your listening pleasure the above post are very correct.,but for tseting your deck or amp you just got or the one your buddy's friends got and you not sure of it  they do come in really handy even when your trying to check some 12vdc device and dont want to use your cars supply or a typical ac/dc converter that came off of your playstation or something. very quick and efficent, more safer and veritile to use. i think they are diffently worth the money.



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JUST ONE MORE AMP!!!
hu,alpine cva 1005/dva 5205
sound processor,symmetry(first one).
sub amp,power 1000 the terminator.(1992).
subs,spl comp dual 1 ohms.
punch 150hd on a 10" ev.
alotofhighs




Posted By: footbaldd
Date Posted: November 27, 2005 at 1:10 AM
Like the others said you need to look for a 12volt dc powersupply. Then you also need to look at the rail to make sure that it can handle the amperage you want to pull.




Posted By: godblessdremil
Date Posted: November 27, 2005 at 4:32 AM
Ya automobile car electric systems run on Direct Current, In the united states(since you use 120v as an example) we use Alternating current. Basaclly fry the shhh out of that HU.

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Posted By: youngone
Date Posted: November 27, 2005 at 5:11 PM
Alright sorry was gone for a bit there.

I'm not planing hooking up the speakers to the deck I'm wanting to use the RCA hook ups to run the two amps i have in my room. one is for the sub, the other is for the speakers.

After the first response i got from dwarren. i have bin looking at the home audio receivers that are out there and i have found that there aren't any receivers that will work for me. what i need to have from the receiver is a two pairs of RCA's that is for the lows, mids, and the highs. either one is for the lows and the other pair is for the mids and highs, either way. another option is i could have one pair of them that runs both the sub and the speakers. i already have the crossover to separate the signals. o ya the receiver also needs to have a aux in so i can hook my computer to it. after looking around i haven't bin able to find anything that will do for me. if anybody knows of a receiver that is going to suite me please help. if not i'm going to go back to doing the deck. witch already has all the RCA's that i need and the aux to. please help and thank you guys so fare for all the help.posted_image

Aaron

-------------
Want to know some good equipment- JL,Adire Audio,Mcintosh,Brax,Helix,Eclipse,JBL,RE,Dimoand Audio,Zapco, pritty much anything DYhon,Forbidden recommend
On the12volt you give some info and you get in




Posted By: DYohn
Date Posted: November 27, 2005 at 5:15 PM
First off, almost all receivers have line-level outputs, so I don't know what you looked at.  But are the amps you plan to use designed for car audio or for home use?  If they are car audio gear, you will be wasting your time trying to make it work in your house.  Not a good idea.  You'll end up spending more for power supplies than you would simply buying the proper home gear.

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Support the12volt.com




Posted By: dwarren
Date Posted: November 27, 2005 at 5:17 PM

Your deck is capable of bi amping, that is why there are so many RCA outputs. Are you going to bi-amp part of your setup?

Let me ask you this, how many inputs combined do your amps have?



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Posted By: DYohn
Date Posted: November 27, 2005 at 5:34 PM
Back to the original topic of using a car HU as a music source, I have an old Pioneer mounted in the wall of my garage using a 450watt computer power supply as my AC-DC converter and the HU amps drive a couple of old bookshelf speakers.  It's my workshop radio.  So it can be fairly easily done if you know what you're doing.  Power amps, though, are a completely different kettle of fish.

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Posted By: footbaldd
Date Posted: November 27, 2005 at 6:03 PM
Yea if you just want deck power, you could hook up an old at power supply with the switch, or even an atx. If you go with an atx you will need to rig a switch to power it up, but its not too hard. Good luck.




Posted By: fingaz22
Date Posted: November 27, 2005 at 8:08 PM

like dyohn and dwarren said you are way better off getting the home reciever that suites you and there is diffently one for your need with the help of amps and crossover all designed for home applications.

this will run you some good money either way, i'm not to sure on exactly how much. but if your dead straight on the car audio bit and you have everything except a good power source then you can look into "parts express" parts-express.com, for the power supply that will produce the amparge you require. look for the #120-558 it is a 40 amp and should do you good. but still might be a little under what you nedd thats depending on how many watts rms you will be running, how much amparge your system will require total. this power supply will cost a little under 200 bucks.

you still need to consider that this will not sound like it would in a car. i've got it to go either way, good and bad depending on box design. 



-------------
JUST ONE MORE AMP!!!
hu,alpine cva 1005/dva 5205
sound processor,symmetry(first one).
sub amp,power 1000 the terminator.(1992).
subs,spl comp dual 1 ohms.
punch 150hd on a 10" ev.
alotofhighs




Posted By: youngone
Date Posted: November 27, 2005 at 8:44 PM
thanks guys you answered really quick.

dwarren wrote:
"Let me ask you this, how many inputs combined do your amps have?"    the answer to that would be two pairs left, right, left, right.

And as an answer to DYohn no this is not car audio stuff that i have in my room. i have a Pyle pt-1800(Pyle for Pyle of crap, but it works) and a rythmik audio amp for the sub.
the amp for the sub is real nice though. o ya and a Pyle crossover(still crap).

DYohn I've bin hearing about this computer power thing could you explain on that topic. i would really like to do this and have that nice alpine deck staring at me (actually working). is the power strip big, complicated, or hard to work with. i gust want to get the deck fully operating, as it would be in a car. also is the stuff to make the strip expensive.

DYhon wrote:
"So it can be fairly easily done if you know what you're doing." "fairly easily done" that doesnt sound to reassuring, if you could tell me what to do in order to do that for this deck (Alpine cda-9851).
or if you think i would be better of going with something else tell me. but i still would like to do this though you now gust to do something different, and cause it is a nice deck to run this setup with if i could get power to it. thanksposted_image

Aaron

-------------
Want to know some good equipment- JL,Adire Audio,Mcintosh,Brax,Helix,Eclipse,JBL,RE,Dimoand Audio,Zapco, pritty much anything DYhon,Forbidden recommend
On the12volt you give some info and you get in




Posted By: youngone
Date Posted: November 27, 2005 at 8:59 PM
sorry for the double post but the crossover is actually for a car hehe.posted_image so i have a bit of background noise at low levels.

again sorry for the double post posted_image

-------------
Want to know some good equipment- JL,Adire Audio,Mcintosh,Brax,Helix,Eclipse,JBL,RE,Dimoand Audio,Zapco, pritty much anything DYhon,Forbidden recommend
On the12volt you give some info and you get in





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