Hey, i'm going to try my hand at building a system in my 2003 Chevy Silverado 4x4, regular cab. I'm probably going to get an Alpine CDA 9857 as the head unit, but if anyone hates that unit please let me know. The whole system i'm going to try and wire for 2ohms impendance. I already have an Infinity 7451a 4channel 111watts rms x 4 and 278watts rms x 2. I'm planning on using that for two 10" subs behind each seat. Not sure what subs i should use, planning on spending 150 or less, i'm thinking of an Infinity kappa 104.7w. its a selectable 2ohm or 8ohm subs for easy install which is nice for a nube like me. and the subs really can't be deeper than 5"inches cuz of the box i'll be building. For speakers i'm thinking of using Infinity Kappa 5.25 components and Infinity Kappa 4x6plates. I was thinking of using an Alpine MRP-F240 or 50 (is a 50watts x4)to power the plates and components. Also, i need help on how to hook up frequency cut offs for all the speakers, cuz i don't want lows in those 4x6's. Also, what wires, patch cables and/or wiring kits do y'all recommend? I'm also pondering using dynamat on the doors and polyfill in the boxes. Who else thinks laws requiring door chimes are a bunch of bull crap?
Replies (10)
swez on 06/24/2006 04:47:31
The 4x6 plates will not do lows well at all. They will need to be filtered to block lows, below 150 - 300 Hz. Bass blocking caps will do the job for you here, or use the amps HPF to determine the best sounding mid/highs.
The 5-1/4" Comps, will go a bit lower. These can be run with the HPF between 80-100 Hz., depending on amping power.
That Alpine F-240 may be a bit small. It can deliver 50 x 4 RMS @ 2 ohms per channel. It's a good fit for your 4x6" plates, but the front Comps could use a bit more power to keep up with your bass. Care to look for an amp that can deliver more like 75-85 RMS @ 2 ohms?
If you use that Infinity amp for subs and plan to bridge it down to a 2 channel system, you'll need a pair of 4 ohm subs. The Infinity Ref series 10's give a nice sound too. Just be sure to use single coil, 4 ohm subs here.
Front Doors: Infinity Kappa 50.7cs
Rear Pillars: Infinity Kappa 462.7cfp
Woofers: Infinity Ref 1050w (4-9/16" deep) These would be best in a sealed box, 0.75 cf/chamber.
http://www.etronics.com/product.asp?dp=6252D262E6421253B3D363C3B357E373637373134313&stk_code=inf1050w&svbname=30&CA=Y
In this truck, your matting should be focused on the front doors and rear wall of the cabin.
Swez
Victor on 06/24/2006 05:04:48
either 4 ohm SVC or 2ohms DVC,,, either of the sub will do.
npriven on 06/24/2006 21:10:49
i thought i'd get the f-240 cuz it has the right rms for the 4x6 and a little extra power for the comps, is it okay though to go with a higher power amp like you said and somehow turn the power down on the 4x6 so that i'm not over loading them?
swez on 06/25/2006 09:21:42
The Alpine MRP- F240 is a bit small for powering your front and rear speakers. It may not keep up with the bass you get from that Infinty amp noted earlier.
Have you determined which model Infinity's you wish to use at this time? Once we know that choice, picking a suitable amp will be easier.
Swez
npriven on 06/25/2006 22:18:12
o ya, sorry bout that, i've had infinity reference series before and they had a really nice clean sound, and i'm gonna notch it up with the kappa series just cuz i love hearing my music in all its glory. so Kappa 462.7cfp and Kappa 50.7cs and for subs i've narrowed it down to the Infinity reference 1050w (for the cheap route) and the Kappa 102.7w (for the not so cheap route)
swez on 06/26/2006 09:46:30
OK, looks like we have a plan for your front and rear speakers. Now, we need to get a budget number for the 4 channel amp you will use. Then, we can move along to the subs of choice. A pair of Infinity Ref 1050w's will do a good job here.
Swez
PS We also have to keep an eye on power managment here. A solid 4 channel will draw ~40 amperes max draw at full power. Your sub amp (Infinity amp noted above) is very strong.its. It will draw very close to +50A's on heavy bass hits. This may strain the stock electrical system, depending on your listening habits. Some electrical upgrades may be needed in the future... but we'll cross that bridge when we get there.
npriven on 06/26/2006 18:37:34
it'd be hard to pay more than 200 bucks for an amp to power two pairs of speakers, and what kind of electrical upgrades are we talking about, like capacitors or an extra battery larger alternator, etc.? and why do you recommend the 1050ws over the kappa 102.7w?
swez on 06/27/2006 09:29:08
The Kappa 102.7 is a nice sub. However, they are only rated at 350 watts RMS and are a lot more expensive than the REF series. The Refs will handle the job if you run a pair of them off that Infinity Amp.
Power upgrades... I think this truck uses a 105A ALT stock from the factory. You can confirm that by calling any good autoparts dealer and give the details on your truck.
Upgrades:
1. Big 3 wiring upgrade
http://forum.sounddomain.com/forum/ultimatebb.cgi?ubb=get_topic;f=5;t=007801;p=
2. High CCA rated BAT (800 CCA or higher)
3. #2 gage (or large) main power feed line
The other option here that seems to make the most sense, buy a Class D sub amp (much less current draw) and run your full range speakers with that Infinity amp you have now. Yes, this is amp is stronger than your full range speakers can handle, but adjusting the amp gains and HPF filters carefully, should do the job well and avoid costly electrical upgrades too.
This amp and a single sub (Alpine SWR-1042D) would make a very good pairing for your bass engine.
http://www.onlinecarstereo.com/CarAudio/ProductDetail.aspx?ProductID=14935 (Kenwood Mono amp)
http://www.onlinecarstereo.com/CarAudio/ProductDetail.aspx?ProductID=14952 (Alpine SWR-1042D) 6-7/8" deep
If you like this idea and choose to use the Infinity 7451a for full range, we will need to look at 4 ohm speakers. The items noted earlier are 2 ohm units and they will not handle the power the 7451a can deliver at 2 ohm loads.
Comments?
Swez
npriven on 06/27/2006 19:14:14
i'm seriously considering the single subwoffer set up you suggested because it would be easy to install an amp behind each seat and a sub in the middle, so what speakers would you suggest that could handle that kind of power?
swez on 06/27/2006 20:31:16
I think it's a good plan and much less hassle too. Not only that, but save the expense on some things as well. I have several thoughts to pass on to you. Care to chat on YIM or Skype.com about this in detail? My ID on both is "swezdp". Or, my e-mail is: swezdp@juno.com
Rear 4"x6" plates: These are the the strongest speakers I can find in this format.
http://www.crutchfield.com/S-qsmZi2Wrkdb/cgi-bin/ProdView.asp?g=51400&I=107MMC460
Front Comps:
1. http://www.crutchfield.com/S-qsmZi2Wrkdb/cgi-bin/ProdView.asp?g=410&I=107DB5250
2. http://www.crutchfield.com/S-qsmZi2Wrkdb/cgi-bin/ProdView.asp?g=410&I=1085010CS
As for the bass engine, 300 RMS is a solid place to be for a single 10 or 12" sub. Amp prices will be good in this power range too. A high efficiency sub can do very well with this amount of power.
FYI: If you run a 500-600 RMS sub system, it will be a bit louder. But the extra cost and possible electrical upgrades will negate the cost savings. Is +3dB more bass, worth that added hassle and expense?
What say you?
Swez
PS Will still have to tone down the amp gains with that Infinity amp you have now. But there are ways to manage all this. I can give you details as we progress and define the system further and probably save you some $$'s in the process too.
Replies (10)
swez on 06/24/2006 04:47:31
The 4x6 plates will not do lows well at all. They will need to be filtered to block lows, below 150 - 300 Hz. Bass blocking caps will do the job for you here, or use the amps HPF to determine the best sounding mid/highs.
The 5-1/4" Comps, will go a bit lower. These can be run with the HPF between 80-100 Hz., depending on amping power.
That Alpine F-240 may be a bit small. It can deliver 50 x 4 RMS @ 2 ohms per channel. It's a good fit for your 4x6" plates, but the front Comps could use a bit more power to keep up with your bass. Care to look for an amp that can deliver more like 75-85 RMS @ 2 ohms?
If you use that Infinity amp for subs and plan to bridge it down to a 2 channel system, you'll need a pair of 4 ohm subs. The Infinity Ref series 10's give a nice sound too. Just be sure to use single coil, 4 ohm subs here.
Front Doors: Infinity Kappa 50.7cs
Rear Pillars: Infinity Kappa 462.7cfp
Woofers: Infinity Ref 1050w (4-9/16" deep) These would be best in a sealed box, 0.75 cf/chamber.
http://www.etronics.com/product.asp?dp=6252D262E6421253B3D363C3B357E373637373134313&stk_code=inf1050w&svbname=30&CA=Y
In this truck, your matting should be focused on the front doors and rear wall of the cabin.
Swez
Victor on 06/24/2006 05:04:48
either 4 ohm SVC or 2ohms DVC,,, either of the sub will do.
npriven on 06/24/2006 21:10:49
i thought i'd get the f-240 cuz it has the right rms for the 4x6 and a little extra power for the comps, is it okay though to go with a higher power amp like you said and somehow turn the power down on the 4x6 so that i'm not over loading them?
swez on 06/25/2006 09:21:42
The Alpine MRP- F240 is a bit small for powering your front and rear speakers. It may not keep up with the bass you get from that Infinty amp noted earlier.
Have you determined which model Infinity's you wish to use at this time? Once we know that choice, picking a suitable amp will be easier.
Swez
npriven on 06/25/2006 22:18:12
o ya, sorry bout that, i've had infinity reference series before and they had a really nice clean sound, and i'm gonna notch it up with the kappa series just cuz i love hearing my music in all its glory. so Kappa 462.7cfp and Kappa 50.7cs and for subs i've narrowed it down to the Infinity reference 1050w (for the cheap route) and the Kappa 102.7w (for the not so cheap route)
swez on 06/26/2006 09:46:30
OK, looks like we have a plan for your front and rear speakers. Now, we need to get a budget number for the 4 channel amp you will use. Then, we can move along to the subs of choice. A pair of Infinity Ref 1050w's will do a good job here.
Swez
PS We also have to keep an eye on power managment here. A solid 4 channel will draw ~40 amperes max draw at full power. Your sub amp (Infinity amp noted above) is very strong.its. It will draw very close to +50A's on heavy bass hits. This may strain the stock electrical system, depending on your listening habits. Some electrical upgrades may be needed in the future... but we'll cross that bridge when we get there.
npriven on 06/26/2006 18:37:34
it'd be hard to pay more than 200 bucks for an amp to power two pairs of speakers, and what kind of electrical upgrades are we talking about, like capacitors or an extra battery larger alternator, etc.? and why do you recommend the 1050ws over the kappa 102.7w?
swez on 06/27/2006 09:29:08
The Kappa 102.7 is a nice sub. However, they are only rated at 350 watts RMS and are a lot more expensive than the REF series. The Refs will handle the job if you run a pair of them off that Infinity Amp.
Power upgrades... I think this truck uses a 105A ALT stock from the factory. You can confirm that by calling any good autoparts dealer and give the details on your truck.
Upgrades:
1. Big 3 wiring upgrade
http://forum.sounddomain.com/forum/ultimatebb.cgi?ubb=get_topic;f=5;t=007801;p=
2. High CCA rated BAT (800 CCA or higher)
3. #2 gage (or large) main power feed line
The other option here that seems to make the most sense, buy a Class D sub amp (much less current draw) and run your full range speakers with that Infinity amp you have now. Yes, this is amp is stronger than your full range speakers can handle, but adjusting the amp gains and HPF filters carefully, should do the job well and avoid costly electrical upgrades too.
This amp and a single sub (Alpine SWR-1042D) would make a very good pairing for your bass engine.
http://www.onlinecarstereo.com/CarAudio/ProductDetail.aspx?ProductID=14935 (Kenwood Mono amp)
http://www.onlinecarstereo.com/CarAudio/ProductDetail.aspx?ProductID=14952 (Alpine SWR-1042D) 6-7/8" deep
If you like this idea and choose to use the Infinity 7451a for full range, we will need to look at 4 ohm speakers. The items noted earlier are 2 ohm units and they will not handle the power the 7451a can deliver at 2 ohm loads.
Comments?
Swez
npriven on 06/27/2006 19:14:14
i'm seriously considering the single subwoffer set up you suggested because it would be easy to install an amp behind each seat and a sub in the middle, so what speakers would you suggest that could handle that kind of power?
swez on 06/27/2006 20:31:16
I think it's a good plan and much less hassle too. Not only that, but save the expense on some things as well. I have several thoughts to pass on to you. Care to chat on YIM or Skype.com about this in detail? My ID on both is "swezdp". Or, my e-mail is: swezdp@juno.com
Rear 4"x6" plates: These are the the strongest speakers I can find in this format.
http://www.crutchfield.com/S-qsmZi2Wrkdb/cgi-bin/ProdView.asp?g=51400&I=107MMC460
Front Comps:
1. http://www.crutchfield.com/S-qsmZi2Wrkdb/cgi-bin/ProdView.asp?g=410&I=107DB5250
2. http://www.crutchfield.com/S-qsmZi2Wrkdb/cgi-bin/ProdView.asp?g=410&I=1085010CS
As for the bass engine, 300 RMS is a solid place to be for a single 10 or 12" sub. Amp prices will be good in this power range too. A high efficiency sub can do very well with this amount of power.
FYI: If you run a 500-600 RMS sub system, it will be a bit louder. But the extra cost and possible electrical upgrades will negate the cost savings. Is +3dB more bass, worth that added hassle and expense?
What say you?
Swez
PS Will still have to tone down the amp gains with that Infinity amp you have now. But there are ways to manage all this. I can give you details as we progress and define the system further and probably save you some $$'s in the process too.
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