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09-12-2004, 11:13 AM
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#1
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Maximum Bitrate
Join Date: Jun 2004
Location: Massachusetts
Vehicle: 2004 GMC Canyon 4x4 Z71 Reg Cab
Posts: 837
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Intigrated Amp
I'm making my carputer completely removeable. The only connection to my car will be a 12v line from the battery and a ground. And even that is going to be hidden and made to look like a cigarette lighter.
Everything, drives, mobo, screen, is to be mounted in a box. I'm considering putting a tiny (low power and physically small) amp in the box along with some 6" speakers (maybe 5 1/4" depending on room).
I know there'll be a heat issue, but will the driving speakers and amp make too much noise on my system?
Is this a stupid thought and I should abandon it now?
__________________
,./(0)3
'04 Canyon 4x4 pickup
[---PC on hold----working on external fiberglass "tool" box---]
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09-12-2004, 02:32 PM
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#2
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Maximum Bitrate
Join Date: Jun 2004
Location: Massachusetts
Vehicle: 2004 GMC Canyon 4x4 Z71 Reg Cab
Posts: 837
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Anyone?
__________________
,./(0)3
'04 Canyon 4x4 pickup
[---PC on hold----working on external fiberglass "tool" box---]
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09-12-2004, 02:57 PM
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#3
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Variable Bitrate
Join Date: Jun 2004
Location: Buena Park, CA
Vehicle: 2004 Toyota 4Runner SR5
Posts: 326
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That would only work if you use EPIA or some small motherboard, and isolate the HD from the speaker vibration. Wouldn't it be very huge, though considering speakers, amp, LCD in there. It is great to prevent from getting jacked, however. It also would need a couple of fans like 80cm to cool the amp and HD
__________________
Carputer currently 'ghettoed' into car!!!
EPIA MII-12000
Ampie Case with rigged extra USB
Hitachi 60GB
Holux GPS mouse with iGuidance 2.0
Lilliput 7" touchscreen
Netgear WG121 USB WiFi
Carnetix P1260
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09-12-2004, 03:03 PM
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#4
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cheap custom title
Join Date: Mar 2004
Location: Ghent - Belgium
Vehicle: 01 Renault Espace BiFuel | Mitsubishi Canter | BMW R1200GS Adventure | Yamaha YZF600R | Honda CB650
Posts: 1,856
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erm, laptop? 
Seriously, this sounds nice. Maybe use the amp of some amplified speakers, which usually work at 12v. |
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09-12-2004, 03:22 PM
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#5
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Maximum Bitrate
Join Date: Jun 2004
Location: Massachusetts
Vehicle: 2004 GMC Canyon 4x4 Z71 Reg Cab
Posts: 837
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Yup, laptop motherboard. 2.5" HDD and a USB DVD drive... I should have room. Think there is EMI problems ?
__________________
,./(0)3
'04 Canyon 4x4 pickup
[---PC on hold----working on external fiberglass "tool" box---]
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09-12-2004, 03:26 PM
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#6
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cheap custom title
Join Date: Mar 2004
Location: Ghent - Belgium
Vehicle: 01 Renault Espace BiFuel | Mitsubishi Canter | BMW R1200GS Adventure | Yamaha YZF600R | Honda CB650
Posts: 1,856
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What case are you going to use? If it isn't metal, put some tin foil on the inside and ground it. If you notice interference, you can still put some metal sheets between different parts and ground them.
Definately show us some pictures!
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09-12-2004, 03:28 PM
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#7
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Maximum Bitrate
Join Date: Jun 2004
Location: Massachusetts
Vehicle: 2004 GMC Canyon 4x4 Z71 Reg Cab
Posts: 837
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I'm thinking I might isolate the speakers in a metal box for EMI and to cut down on vibration. It's not going to be a very high power system, I'm not looking for 15" subs or anything. Probably some good-quality 6" speakers.
I figure it's more modular and better quality than my stock HU/speakers and an FR modulator.
Do the moving elements in a speaker's megnets cause much EMI ?
__________________
,./(0)3
'04 Canyon 4x4 pickup
[---PC on hold----working on external fiberglass "tool" box---]
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09-12-2004, 03:35 PM
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#8
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cheap custom title
Join Date: Mar 2004
Location: Ghent - Belgium
Vehicle: 01 Renault Espace BiFuel | Mitsubishi Canter | BMW R1200GS Adventure | Yamaha YZF600R | Honda CB650
Posts: 1,856
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Well, a speaker uses electro-magnetic fields to move the conus. So yes, there will be a field. It might be enough to ground the metal (check with a multimeter it isn't connected to one of the poles).
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09-12-2004, 04:10 PM
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#9
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MySQL Error
Join Date: May 2003
Location: Miami, FL
Vehicle: 2002 Dodge Ram 1500 Quad Cab
Posts: 4,343
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as long as you put metal around the speakers should keep most the magnetic field inside. Last time I pulled a computer apart that had speakers mounted inside they were setup that way.
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09-12-2004, 06:20 PM
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#10
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Maximum Bitrate
Join Date: Jun 2004
Location: Massachusetts
Vehicle: 2004 GMC Canyon 4x4 Z71 Reg Cab
Posts: 837
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Does it have to be a solid metal box or would a cage work?
__________________
,./(0)3
'04 Canyon 4x4 pickup
[---PC on hold----working on external fiberglass "tool" box---]
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