Amp wiring help + 3d printed tablet mount - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

transition · 02-18-2014, 12:49 PM

I'm replacing my head unit with a tablet and i'll be using an amp (Alpine KT-445U) in place of another head unit. One thing i'm not sure of at the moment is how this is going to work due to the already existing factory amp for the door speakers. I've got the Alpine amp wired up ready to be plugged into the factory harness but i'm concerned i'll effectively be doubling the power to the door speakers now that i'll have 2 amps powering them? Not sure if i should be somehow disconnecting/bypassing the factory amp?

Part II: Wasn't real happy with any of the mounting solutions i found so i custom modeled a mount that i 3d printed:

ProTekk · 02-18-2014, 01:01 PM

Want to make me up a mount like that? I'll pay whatever your asking price is.

My Nexus 7 would thank you

transition · 02-18-2014, 01:41 PM

Quote:

Originally Posted by ProTekk

Want to make me up a mount like that? I'll pay whatever your asking price is.

My Nexus 7 would thank you

Just getting some quotes from Shapeways as they'll have access to better printers.

danielre · 02-18-2014, 03:21 PM

In for price as well, mount looks nice.

transition · 02-18-2014, 03:34 PM

Quote:

Originally Posted by danielre

In for price as well, mount looks nice.

The price appears to be around $34 for the front half of the piece:

https://www.shapeways.com/model/1719...html?li=aeTabs

The back support came in a ~$30 which seems really high. Could be made quite a bit cheaper than that. I've never ordered from Shapeways so i'm not sure exactly how the surface would turn out. I'd imagine it would need a bit of massaging (sanding,paint,primer) to be acceptable.

transition · 02-18-2014, 04:27 PM

Still need some amp wiring help.

soundman98 · 02-19-2014, 12:44 AM

from what i understand (which isn't much yet because i really need to just tear my car apart), the oem amp uses high-level inputs for the signal, so the amp that you're going to use doesn't really matter, as it's only boosting the signal far enough to allow the factory amp to pick up and provide an adequate sound level.

there isn't any multiplication in the system like what you're thinking

as far as weather it's worthwhile to replace the factory amp, that's completely up to you-- there's nothing about your current planned setup that seems like it should require a full audio upgrade...

Reflex · 02-20-2014, 05:18 AM

Can't help with your amp problems, but I'd buy a mount too!

jc2532 · 03-03-2014, 10:08 PM

I want a mount!!

glorydays · 03-04-2014, 09:41 PM

just let me know where to send my money.

02-18-2014, 12:49 PM	#1
transition Banned Join Date: Sep 2013 Drives: BRZ Location: Earth Posts: 206 Thanks: 43 Thanked 77 Times in 47 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	Amp wiring help + 3d printed tablet mount I'm replacing my head unit with a tablet and i'll be using an amp (Alpine KT-445U) in place of another head unit. One thing i'm not sure of at the moment is how this is going to work due to the already existing factory amp for the door speakers. I've got the Alpine amp wired up ready to be plugged into the factory harness but i'm concerned i'll effectively be doubling the power to the door speakers now that i'll have 2 amps powering them? Not sure if i should be somehow disconnecting/bypassing the factory amp? Part II: Wasn't real happy with any of the mounting solutions i found so i custom modeled a mount that i 3d printed: Last edited by transition; 02-18-2014 at 01:42 PM.

02-19-2014, 12:44 AM	#7
soundman98 ProCrastinationConsultant Join Date: Sep 2013 Drives: '14 Ranger, '18 Tacoma 4Dr LB Location: chicago-ish Posts: 11,330 Thanks: 35,240 Thanked 13,675 Times in 6,782 Posts Mentioned: 98 Post(s) Tagged: 0 Thread(s)	from what i understand (which isn't much yet because i really need to just tear my car apart), the oem amp uses high-level inputs for the signal, so the amp that you're going to use doesn't really matter, as it's only boosting the signal far enough to allow the factory amp to pick up and provide an adequate sound level. there isn't any multiplication in the system like what you're thinking as far as weather it's worthwhile to replace the factory amp, that's completely up to you-- there's nothing about your current planned setup that seems like it should require a full audio upgrade... __________________ "The time you enjoy wasting is not wasted time"

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02-18-2014, 03:21 PM	#4
danielre Member Join Date: Aug 2013 Drives: 2013 Scion FR-S Location: Syracuse, NY Posts: 12 Thanks: 0 Thanked 0 Times in 0 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	In for price as well, mount looks nice.

02-18-2014, 04:27 PM	#6
transition Banned Join Date: Sep 2013 Drives: BRZ Location: Earth Posts: 206 Thanks: 43 Thanked 77 Times in 47 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	Still need some amp wiring help.

02-20-2014, 05:18 AM	#8
Reflex Senior Member Join Date: May 2012 Drives: Whiteout FR-S Location: New Brunswick, NJ Posts: 222 Thanks: 61 Thanked 13 Times in 12 Posts Mentioned: 0 Post(s) Tagged: 2 Thread(s)	Can't help with your amp problems, but I'd buy a mount too!

03-03-2014, 10:08 PM	#9
jc2532 Member Join Date: Feb 2014 Drives: '13 FRS Location: SoFL Posts: 12 Thanks: 0 Thanked 7 Times in 4 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	I want a mount!!

03-04-2014, 09:41 PM	#10
glorydays Remember me? Join Date: Dec 2011 Drives: BRZ Series.Blue Location: Honolulu, HI Posts: 483 Thanks: 259 Thanked 105 Times in 68 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	just let me know where to send my money.

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