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Old Mar 15, 2005 | 04:54 PM
  #1  
voodoosmooth's Avatar
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Talking System design question

Okay, here's the scenario: I have a 1997 F250HD PSD Crew Cab. I have an Alpine CDA-7839 HU, 2 Clarion 5 1/4" in the doors and 2 Sony 6x8's (newer ones) behind rear seat. My goal is to build a custom center console by removing center seat. In it I want to house a single subwoofer and an amplifier to power it (i.e., down firing subwoofer). I am not getting enough power and quality sound from HU and current speakers. I have to turn bass way down or it will cut out when I play it a little loud.

I am confused on the system design part. I've asked similar questions on this board but I am missing the picture I think.

Question 1: If I install a subwoofer and amp, how will I control output from the HU? How does setting bass or treble affect what's going to the sub or current speakers?

Question 2: Would it be better to buy an amp to run all the speakers, rather than just the sub?

Question 3: What size sub should I consider?

No bumping! Just quality bass sound at louder levels for hard rock/metal.

Thanks for the help and sorry if these questions are noob!
 
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Old Mar 15, 2005 | 06:43 PM
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Question 1: If I install a subwoofer and amp, how will I control output from the HU? How does setting bass or treble affect what's going to the sub or current speakers?
If the HU has a sub output, use that. Get a mono amp for the sub with a low level crossover.

Question 2: Would it be better to buy an amp to run all the speakers, rather than just the sub?
Yes.
Question 3: What size sub should I consider?
8" or 10" should be enough
 
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Old Mar 15, 2005 | 07:34 PM
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Triton, thanks for the reply.


Let's say I buy the 4 channel amp. What wattage amp should I consider and how would I split the amp output to the subwoofer and the 4 speakers?

I'm not sure it matters, but the Clarion 5 1/4" in the doors are 2-way speakers and the new Sony's are 3-way.
Thanks again!
 
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Old Mar 15, 2005 | 07:46 PM
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There's lots of different ways to go. Take a look here so you can see what way you want to go:http://www.jlaudio.com/amps/amp_pdfs.html

You probably what the "killer, on a budget, system" plan.
 
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Old Mar 16, 2005 | 08:26 AM
  #5  
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Would have to agree with Triton's logic here. You would be amazed at what difference a nice 4 channel amp would make even with your Clarion's and Sony's alone. The signal from an amp will be orders of magnitude cleaner sounding and will drive your speakers much more efficiently. Adding a sub and amp somewhere will be adding more gravy. Once you have a sub and listen for a while, turn it off and you will be amazed at the difference.

I am in the process of installing a budget system in my '04 F150 Screw and will be adding 4ch amp for components in the front (Infinity Kappas) and 6x8's in the rear (Kenwood), coupled with a 2 channel amp driving 2 10" Kenwood subs. Thus, I will not use the power from the head unit whatsoever but instead just leverage the 3 sets of preamp outputs to manage the signals and frequencies.

Good luck!

T
 
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Old Mar 16, 2005 | 09:44 AM
  #6  
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Triton,


Thanks for the link to JL Audio! It's nice to actually physically see the layout and connections so I can figure out what I want to do!

I'm going to go with the 4 Channel amp setup. I'm going to build my center console with a 10" down firing sub in the bottom and install the amp in a compartment above. I think this will be just what I'm looking for.

This is trivial to you guys, but here's what I'm doing in the center console as well:

1. Running RCA cables from AUX Input on my Alpine to center console, terminating into a Y-connector 1/8" minijack for my 30GB MP3 player (no more damn cd's!).

2. I'll also have a power connection (phone or mp3 charger hookup).

3. In the front of the console and on top I'll have a 3 bank guage pod for my diesel guages (pyrometer, trans. temp, etc.)

4. Cup holders and storage area to finish it off.

P.S. Now let's see if I get the time to actually get this done!!!! If I do I'll post pics!
 
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Old Mar 16, 2005 | 11:03 AM
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Just one more thing I'd think about adding to your center console, a fan.

If you enlose that amp somewhere without air movement, it will fry up. They need to distribute the heat off the fins.

Just an FYI.
 
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Old Mar 21, 2005 | 01:20 AM
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Originally Posted by rangerxlt02
Just one more thing I'd think about adding to your center console, a fan.

If you enlose that amp somewhere without air movement, it will fry up. They need to distribute the heat off the fins.

Just an FYI.
I was fixing to add that. Amps create heat, and if heat is not dispensed, say bye to that amp.

Have you thought about a 5-channel amp? If you're kind of on a budget here, that might cut down in the price a little all-together. You will have power to your sub and all speakers. Just my .02
 
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Old Mar 21, 2005 | 08:45 AM
  #9  
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Thanks for the heads up on the fan for the amp! This is definitely where my knowledge of audio systems is lacking.

In the next week or so, I'm going to hit a couple of audio stores just to "fish" for ideas and see what the installers would do. Maybe they have a better idea, like amp location, etc.

I think I'm going to take this a lot slower. I've done some measuring in the truck so I'm going to sketch out the design for the console.

BTW, where do you get the fans? Are you using something like the fans in computers?

Thanks.
 
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Old Mar 21, 2005 | 11:05 AM
  #10  
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If it were me I would use little computer fans. They even have some with neon lights in them if you want some extra effects.
 
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Old Mar 24, 2005 | 09:53 PM
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personaly i would get a 4 chanel for the speakers then a more powerful mono for the subs and put a port on eitehr side of the console down near the floor will mostlikely give you a deeper note
 
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Old Mar 28, 2005 | 02:43 PM
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Voodoo, check out my gallery, I have 2-10" RF HX2 subs (downfire) in a custom console in the same truck! Makes plenty of noise and the airspace is exact to RF specs.

Max
 
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Old Mar 28, 2005 | 03:20 PM
  #13  
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Looks nice. I like your bumper lol.
 
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Old Mar 28, 2005 | 06:56 PM
  #14  
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Max1775!

Love it! That looks great! Have you "spilt" anything on the amp? Coffee, soda? Okay, would it be possible to either get more pictures or your design notes? It really looks good and I'd like to build something close to what you built.

Thanks!

Voodoo
 
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Old Mar 28, 2005 | 08:04 PM
  #15  
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Boss amps come with a control **** for the gain on thier amps...

most amp wiring kits come with an option that where can connect 2 amps to 1 wiring kit.
 
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