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Old 05-18-2011, 03:36 PM   #1
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new speakers, new head unit + amp needed? help please!

hey guys i know theres already been some talk of this but was wondering if i could clear it up with some experience.

iam getting these speakers

Amazon.com: Polk Audio DB6501 6.5-Inch 2-Way Component System (Pair, Silver): Electronics
and
Amazon.com: Polk Audio DB651 6.5-Inch Coaxial Speakers (Pair, Silver): Electronics

everything else will be stalk including the sub and head unit. do you suggest i purchase a new head unit, and with that a new amp? Let me know as I have already ordered the speakers and need some advice if a new amp and HU is needed. I have a 2008 Jeep Wrangler Sahara.

thanks !
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Old 05-18-2011, 04:15 PM   #2
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Those are some great sounding speakers. Try it out first before you decide what you need in regards to head unit and amplifiers. It's all personal preference. Make sure you use some polyfil in the soundbar and front speaker enclosures to get better sound.

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Old 05-18-2011, 10:04 PM   #3
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thanks chris...if iam looking for the best sound possible should i just go ahead and buy the head unit? ill test it out... i am a big guy on music but unfortunatly dont know much about making it sound the best... and if i do end up buying the HU should i go ahead and buy the amp as well? thanks!
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Old 05-18-2011, 11:13 PM   #4
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The rear speakers in the soundbar will still be underpowered and will do nothing to cancel road noise with the top off. The factory deck somehow diverts more power to front speakers. Before you put the rears in try to stuff some polyfill in the hollow area of the soundbar (I used the stuffing from an old pillow) to get better performance. Keep in mind if you replace the head unit you will require a Pac c2r- chry4 module to interface with the canbus system and a steering wheel control module to retain those controls. You dont need an amp with a quality HU but you will want to add a sub, so an amp is necessary. Most head units will do 50 watts * 4 channels peak ( 18-ish RMS) I replaced my rears already with some nice alpines but the difference is negligible from the factory paper cone junk. Once my hu goes in I will have a better idea.
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Old 05-19-2011, 01:45 AM   #5
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Quote:
Originally Posted by Oil Country View Post
Keep in mind if you replace the head unit you will require a Pac c2r- chry4 module to interface with the canbus system and a steering wheel control module to retain those controls. You dont need an amp with a quality HU but you will want to add a sub, so an amp is necessary. Most head units will do 50 watts * 4 channels peak ( 18-ish RMS) I replaced my rears already with some nice alpines but the difference is negligible from the factory paper cone junk. Once my hu goes in I will have a better idea.
hey oil country, i was wondering what you meant that if i replace the head unit i need to get the Pac c2r- chry4 module? that is the first i have read of this... thats another $100 i may not have !!!!!
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Old 05-19-2011, 06:55 AM   #6
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There is another thread on here where a regular scosche wiring harness was installed and it worked fine. I am still unsure of the need for this module, but I am going to use it just in case.
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Old 05-19-2011, 11:22 AM   #7
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PAC's C2R-CHY4 radio replacement interface lets you replace the factory radio in select 2004-up Chrysler, Dodge, and Jeep vehicles, without losing the accessory output and other signals. It also allows the new receiver to turn on the factory amplifier, if present.
The C2R-CHY4 adapter also gives you a direct connection to your steering wheel controls, so you won't need to purchase a PAC SWI-CAN adapter — you will still need the appropriate steering wheel audio control adapter for your aftermarket stereo.
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Old 05-19-2011, 11:38 AM   #8
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Quote:
Originally Posted by topangadan View Post
thanks chris...if iam looking for the best sound possible should i just go ahead and buy the head unit? ill test it out... i am a big guy on music but unfortunatly dont know much about making it sound the best... and if i do end up buying the HU should i go ahead and buy the amp as well? thanks!
I still think you should try speakers first. You can do that job and decide what you want from there. It's no extra work to go back if you decide on a new head unit or amp as the most difficult part is mounting the speakers. From experience, I have re-installed OEM H/U before trading my vehicles in and left the upgraded speakers in. They actually had better sound than with just the aftermarket h/u.(more low frequencies) Aftermarket h/u's get you more volume and highs but seem to always lose some of the bass that the speakers are capable of. I amped my components for tops off volume and clarity. Will be putting in 8" JL sub this summer, just deciding if I want to spend $450 on the 5channel amp I want or mount my second amp somewhere. Not much room in a 2dr.
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Old 05-19-2011, 01:02 PM   #9
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thanks for your advice ... haha very true in that there is not much room in the 2door. my question is, if i get the amp, where should i mount it? where did you mount yours? i was thinking under the seat but that leaves the amp vulnerable to getting wet ect... i was going to mount it on the back oppositie of the sub in an enclosure but felt that since i leave my top down often, it may be stolen. i also dont want to deal with all those damn wires :-/
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Old 05-19-2011, 01:35 PM   #10
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Mine is under driver seat screwed to carpet. Since it was $200 new 5 years ago I'm not too worried about it getting wet, would then justify getting what I really want. I want the Alpine PDX-5 marine amp and plan to suspend it about 0.5-1" above the floor with some metal straps. I saw a thread where someone mounted theirs under steering column with some bracket. I'm not sure about that idea as a lot of amps overheat being mounted upside down. I won't mount anything in the back because it's the first place people look for stuff to steal and need that space for the freedom tops if I take them off while away from home.
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Old 05-19-2011, 05:24 PM   #11
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The pdx5 rules because of its small size, but im having hard time finding a deal on them
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Old 05-19-2011, 05:33 PM   #12
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im actually looking at the
Amazon.com: Alpine MRP-F300 - Amplifier - V-Power - 4-channel: Electronics
for its small size and gentleness on my wallet
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Old 05-20-2011, 10:01 AM   #13
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Quote:
Originally Posted by topangadan View Post
im actually looking at the
Amazon.com: Alpine MRP-F300 - Amplifier - V-Power - 4-channel: Electronics
for its small size and gentleness on my wallet
That's the amp I have, bought it for $200 and well worth it. It will definitely push those polk speakers loud and clear. If you want to add a sub in the future you may be in the same place as I am either looking for a 5 channel amp or somewhere to mount a second amp.
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Old 05-20-2011, 10:03 AM   #14
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Quote:
Originally Posted by Oil Country View Post
The pdx5 rules because of its small size, but im having hard time finding a deal on them
Click the link from topangadan's post and look at sidebar on right. PDX-5 for $400, it's not the marine version but it's $25 less than I've seen it before.
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Old 05-20-2011, 10:10 AM   #15
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I have an amp that the previous owner put in, its mounted underneath the driver seat. The problem with that location is that it is prone to getting wet, and it take up foot space for the back seat passengers. Does any one think that an amp is necessary when the top/doors are off? I have them off for basically the entire summer. I have an 05 TJ, so there isn't much other space to put it. And I was thinking of maybe just getting rid of it alltogether.

Thanks
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Old 05-20-2011, 12:56 PM   #16
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Originally Posted by desertgoose View Post
That's the amp I have, bought it for $200 and well worth it. It will definitely push those polk speakers loud and clear. If you want to add a sub in the future you may be in the same place as I am either looking for a 5 channel amp or somewhere to mount a second amp.
yeah, from what i have read it is truly a great amp. on ebay they are selling new for $145 free shipping, not a bad price considering everywhere else is $175-$200... yeah chris i did keep in mind the fact that i may want to add a sub in the future, but for now i just want to conserve all the cargo room possible haha. im glad to hear that this amp can give me some good sound on those polks, im really excited ... did you say you installed it yourself?
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Old 05-20-2011, 11:21 PM   #17
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another thing is the head unit connected to the alarm system, meaning if i took out the ehad unit woul i need to get the alarm system reinstalled?
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Old 05-21-2011, 08:37 AM   #18
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another thing is the head unit connected to the alarm system, meaning if i took out the ehad unit woul i need to get the alarm system reinstalled?

I don't think it is . I just put a pioneer double din touchsreen headunit in the jeep with navigation I had the stock headunit non nav. and everything works great no issues after the install. I have the infinity speakers and they sound 100 times better just from putting a new head unit in.
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Old 05-23-2011, 09:22 AM   #19
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Originally Posted by jstone326 View Post
I have an amp that the previous owner put in, its mounted underneath the driver seat. The problem with that location is that it is prone to getting wet, and it take up foot space for the back seat passengers. Does any one think that an amp is necessary when the top/doors are off? I have them off for basically the entire summer. I have an 05 TJ, so there isn't much other space to put it. And I was thinking of maybe just getting rid of it alltogether.

Thanks
I don't know if it is necessary per say, but it does allow the speakers to put out a lot more volume without distortion. Jeeps don't exactly have the best speaker locations for sound imaging so it is my opinion that by having an amp you get enough volume to really hear the music. If it's in there already why would you go through the work to take it out? You could wait until the amp gets wet and shorts out to remove it since it didn't necessarily cost you anything?
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Old 05-23-2011, 09:28 AM   #20
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Quote:
Originally Posted by topangadan View Post
yeah, from what i have read it is truly a great amp. on ebay they are selling new for $145 free shipping, not a bad price considering everywhere else is $175-$200... yeah chris i did keep in mind the fact that i may want to add a sub in the future, but for now i just want to conserve all the cargo room possible haha. im glad to hear that this amp can give me some good sound on those polks, im really excited ... did you say you installed it yourself?
Yes, I install everything myself......that I have the tools to do. Never trusted anyone else to do something I can do because they never put the attention to detail into the job since it's not their vehicle. Car audio has been a hobby of mine for 18 years. Only difference is now I go for sound quality and not volume.(From multiple 12's to a single 8" that will be done this summer)
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Old 06-08-2011, 06:02 PM   #21
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hey guys,
long time since i posted, but i installed the speakers, HU, and amp and it sounds great. although the bass is severely lacking, the system blasts rock n roll incredibly. theres two issues and questions i have though. the first issue is that when the radio is on with no sound or anything there is a very quite but noticable static / feedback. when i turn up the music it is more noticable. i dont know whether this is something i sohuld expect when installing a new sound system or what. ... another thing is im already thinking of adding a subwoofer since i would prefer a little more bass. my car came with the infinity subwoofer and my question is would i be able to use the casing of the infinity to put in another 10" sub?
thanks!
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Old 06-08-2011, 08:00 PM   #22
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Quote:
Originally Posted by topangadan View Post
im actually looking at the
Amazon.com: Alpine MRP-F300 - Amplifier - V-Power - 4-channel: Electronics
for its small size and gentleness on my wallet
Here it's even more gentle....
Alpine MRP F300 Amplifier
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Old 06-09-2011, 11:14 AM   #23
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Quote:
Originally Posted by topangadan View Post
hey guys,
long time since i posted, but i installed the speakers, HU, and amp and it sounds great. although the bass is severely lacking, the system blasts rock n roll incredibly. theres two issues and questions i have though. the first issue is that when the radio is on with no sound or anything there is a very quite but noticable static / feedback. when i turn up the music it is more noticable. i dont know whether this is something i sohuld expect when installing a new sound system or what. ... another thing is im already thinking of adding a subwoofer since i would prefer a little more bass. my car came with the infinity subwoofer and my question is would i be able to use the casing of the infinity to put in another 10" sub?
thanks!
Sounds like a poor ground. How did you do the ground wire for the amp? A good practice is to use a flat screwdriver or file to take some paint off where the wires come in contact with the floorpan. I have yet to use an existing bolt as they are painted over and not too confident on getting good contact.
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Old 06-09-2011, 11:19 AM   #24
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Also, when you say "car" are you referring to your Jeep? In regard to the "casing", I mean enclosure, you should be able to replace the speaker or put one in if it is the same size. A little confused as to what you are asking in regards to the subwoofer.
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Old 06-09-2011, 03:56 PM   #25
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hey thanks for responding,
yes, im sure the people did a poor job when installing the amp, im going to go to a more reputable place and get it fixed.... yes im talking about my jeep, and in my jeep came an infinity subwoofer in the cargo space behind the rear seats. its the infinity stock subwoofer that is currently actually disconnected since i bought a 4 channel amp that is powering my four polk speakers. i was wondering if i could use the enclosure the existing subwoofer is in to put another, better sub in it. the only reason i would like the same enclosure is because i am getting a Tuffy security box locked back there that fits directly over the stock sub's enclosure. if all that fails iam probably going to go with

Sound Ordnance™ B-8PT 120-watt compact powered subwoofer at Crutchfield.com
which has great reviews and can fit conveniently under my passenger seat. the only problem with that one is that i am going to have to get another amp, probably as the cheapest option this one
Kenwood KAC-5204 2-channel car amplifier — 60 watts RMS x 2 at Crutchfield.com
but i have no idea where i'd put it... i underestimated just how much would go into revamping a whole sound system!! haha
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Old 06-25-2011, 01:08 AM   #26
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Quote:
Originally Posted by topangadan
hey guys i know theres already been some talk of this but was wondering if i could clear it up with some experience.

iam getting these speakers

Amazon.com: Polk Audio DB6501 6.5-Inch 2-Way Component System (Pair, Silver): Electronics
and
Amazon.com: Polk Audio DB651 6.5-Inch Coaxial Speakers (Pair, Silver): Electronics

everything else will be stalk including the sub and head unit. do you suggest i purchase a new head unit, and with that a new amp? Let me know as I have already ordered the speakers and need some advice if a new amp and HU is needed. I have a 2008 Jeep Wrangler Sahara.

thanks !
These are the same speakers I'm looking at. I was going to order two pair of the DB6501. Which set is for the front?

Also, I have the infinity speakers, is it worth upgrading these?

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