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Old 08-22-2018, 08:44 AM
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Upgrading stereo/speakers. Input on selection and some questions

Posted this in the wrong forum earlier:

I am planning to upgrade the stereo and speaker in my 2015 Rubi. I don't have much knowledge around stereos, speakers and the various measurements so I'm posting below what I am planning to purchase and hoping others can let me know if it's decent enough. I am by no means an audiophile, just looking for some louder music with a bit of thump that I can hear with the top down. I will likely also want to add a backup camera that would show through the new HU, though at this time I have no picked one out so if anyone has suggestions, I would love to hear them. I will be having a local car audio company do the installation so I'm not really concerned around the ease/difficulty of installing these items.

HU: Kenwood DMX7705S
Speakers: Polk DB 652
Amp: Sound Ordnance M75-4 (mini amplifier)

A few questions I have:

1) Is it ok to replace both the roll bar speakers and the knee panel speakers with those Polk speakers or should I be getting component speakers for the knee panel? If component, any recs?
1a) If those are ok, then will the current tweeters still run properly?
2) Should that amp be sufficient for the speakers I've selected? I have read that you don't want to underpower the speakers.
3) I assume all of the above is compatible with each other and nothing in addition I need to be aware of?


I think the only thing I am really sold on is the HU so if folks have recs for other speakers/amps that are cheaper in price and will deliver decent quality music, I'm all ears.

Thank you

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Old 08-22-2018, 12:14 PM   #2
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1. Run the coaxial Polks in the soundbar and disconnect the factory tweeter. In the front buy a set of component speakers with the midrange in the lower dash and the tweeters up by the window. Nothing wrong with Polk so maybe stay with the same brand all around.
2. The amp is rated at plenty of power, but I'm not sure how honest the ratings are. S.O. isn't a brand that is highly regarded, but it might be fine. I'd probably consider something from one of the better known manufacturers. Even if the (other manufacturer) amp is rated at less power, it may actually be an honest rating and sound better.
3. Compatibility should be fine. You'll still need an amp wiring kit, RCA's, dash kit, and probably a Maestro box if you want to keep your steering wheel controls. Your installer should have all the kits, and maybe the Maestro.


Keep in mind that your new system will play louder and hopefully sound better at low volume, but you won't get much deep bass from the system. The factory speaker enclosures are small and really limit the low end extension. So you may want to consider a subwoofer once you get everything installed and decide if it's enough for you.
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Old 08-22-2018, 12:18 PM
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Originally Posted by crazychile View Post
1. Run the coaxial Polks in the soundbar and disconnect the factory tweeter. In the front buy a set of component speakers with the midrange in the lower dash and the tweeters up by the window. Nothing wrong with Polk so maybe stay with the same brand all around.
2. The amp is rated at plenty of power, but I'm not sure how honest the ratings are. S.O. isn't a brand that is highly regarded, but it might be fine. I'd probably consider something from one of the better known manufacturers. Even if the (other manufacturer) amp is rated at less power, it may actually be an honest rating and sound better.
3. Compatibility should be fine. You'll still need an amp wiring kit, RCA's, dash kit, and probably a Maestro box if you want to keep your steering wheel controls. Your installer should have all the kits, and maybe the Maestro.


Keep in mind that your new system will play louder and hopefully sound better at low volume, but you won't get much deep bass from the system. The factory speaker enclosures are small and really limit the low end extension. So you may want to consider a subwoofer once you get everything installed and decide if it's enough for you.
Thank you.

Do you think this amp would be a better option? - Kenwood KAC-M1804
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Old 08-22-2018, 12:34 PM   #4
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Back up for a second. First figure out where you want the amp mounted and how much space you have. The Kenwood might be able to be mounted in the dash, but personally I'd like a little more power. If you're stuck in that $150 or so price range, consider buying a 2 channel amp and run the rear speakers off of the deck power. This is what I and some others on the forum have done. You'll be able to buy more amp for the $$ where it counts.



Amps are a personal preference thing just like speakers. But I bought one of these for cheap on Amazon:
i350.2 ? Precision Power
Because PPI has been around for a while, the amps put out rated power, they're also inexpensive, small, and as far as I can tell they're reliable.
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Old 08-22-2018, 10:38 PM   #5
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Two weeks ago I installed the Polk DB 6502 in front knee and tweeter location:
Sounds fine to me. Tweeters required a little modding, where as I'd prefer a plug and play, but not a big deal. I think overall the sound is a lot better.

I also installed the Polk DB 652 on the roll bar last weekend:
I'm sure its me, but I found this to be the biggest pain. You'd think three screws and you're done per speakers, not in my case. I ended up removing the 6 bolts that hold the speaker bar in place and placed it on a table to do the swap. I found the opening to large without the adapter plate, and the adapter plate hard to get sealed against the mounting surface as the flat factory screws are bulky (can't get a good seal). I wish I'd had a little larger speaker and the means to use the grills that came with my purchase. Once complete, the sound is very clean. My sound stage performs cleanly, but remove the doors and I'm researching amps. The HU and amps come later.

I've a Pioneer woofer waiting to be swapped this weekend, again amps come later.
I think a larger roll bar speaker would have saved me a lot of time. Hope you find the sound you're after; so many options out there.
-D
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Old 08-23-2018, 04:46 AM   #6
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Well I would say put the Audison Voce AV K6 up front but I doubt you want to spend that type of money. I love mine, hands down the speakers I have ever heard in car audio and I have heard a lot of them.

Which brings up the point of this post go out and listen to different speakers. What I or someone else think sounds good you may hate. It really is the only way to buy a speaker.
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