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Old 04-28-2012, 06:17 PM   #1
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Exclamation Audio Experts Please Help!

I bought the new Kenwood KDC-BT752HD and four Polk 6.5 speakers to replace the front and soundbar in my 2010. I had them installed and two issues bother me. The first seems pretty obvious - I need some subs since they are component speakers to receive better sound distribution for some of my music genres.

Here is my chief complaint - THE DARN MUSIC at higher levels goes down in volume at random moments or just stays low even when turned up! I turn it back down then turn it back up - music goes up in volume then goes back down! The min watt is 60 for each speaker and 180 peak. The head unit I believe has a built in amp for 50 watt x4. But, my understanding is that the tweeters and speakers are connected via the factory amp.

Is it the factory amp not delivering enough "clean" power to the non-factory speakers causing this!?!?!? :bang head:

These are the speakers:
http://www.bestbuy.com/site/Polk+Aud...9#BVRRWidgetID

Headunit:
http://www.bestbuy.com/site/Kenwood+...52hd&cp=1&lp=1

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Old 04-28-2012, 06:24 PM   #2
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For better bass put some polifill behind the speakers. And i have no clue about why your speakers go down in volume

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Old 04-28-2012, 10:04 PM   #3
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This is why I went all new on my audio. HU, amp and speakers. No factory stuff.
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Old 04-29-2012, 06:52 PM   #4
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Anyone?
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Old 04-29-2012, 07:01 PM   #5
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the head unit is 22x4, the peak is 50x4. always look at the rms power rating. i would bring it back in and have them fix it, they might have messed up the wiring on the unit.
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Old 04-29-2012, 07:29 PM   #6
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Sounds like poor grounding, loose wiring or bad HU.
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Old 04-30-2012, 01:03 AM   #7
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I do this for a living and I need to know the answer to a couple of questions,
Do you have factory steering wheel controls?
By your post sounds like you don't have the infinity system?

Let me know I will point you in the right direction
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Old 04-30-2012, 03:06 AM   #8
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Quote:
Originally Posted by twiggyman View Post
I do this for a living and I need to know the answer to a couple of questions,
Do you have factory steering wheel controls?
By your post sounds like you don't have the infinity system?

Let me know I will point you in the right direction
No, no factory steering wheel controls. Standard wheel. And no, no infinity system.
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Old 04-30-2012, 08:00 PM   #9
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you don't have a factory amp, and no interfaces that would cause this there is only two possible issues and that is bad deck or even a bad speaker out of the box. I would go with the deck being bad most cases when there is a bad speaker the deck goes in protection and doesn't play at all. If you had this installed at BBuy than you shouldnt have a problem getting it fixed.
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Old 04-30-2012, 10:23 PM   #10
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For anything i cant handle(very rare) i always go to a local shop. They have more knowledge than 95% of the installers at bestbuy. And going to a small shop for most of your work they always cut you a deal on the right stuff for the job.
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Old 04-30-2012, 11:14 PM   #11
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For anything i cant handle(very rare) i always go to a local shop. They have more knowledge than 95% of the installers at bestbuy. And going to a small shop for most of your work they always cut you a deal on the right stuff for the job.
I totally agree with that one BBuy has really hurt our industry!
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Old 04-30-2012, 11:54 PM   #12
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Originally Posted by twiggyman

I totally agree with that one BBuy has really hurt our industry!
Best Buy in the past? Yes. Best Buy in it's current state is worlds better in comparison. I've worked at a Best Buy in Colorado Springs while in the Air Force as a Apple sales rep. The guys (not the sales folks) knew there stuff and prided themselves on the work. Condemning a company due to poor experiences or past structure is irrelevant to me. It comes down to the people. It's like a restaurant chain... 9 can be great... And you trust the other one to be great... But, crappy people.

With that being said... They have been kind to me so far. I went to Best Buy for the 18 months interest free and warranty - especially the speakers if the blow. I'm not angry just want it fixed.

The install guy that was there today went to my car and looked around and listened. The volume didn't drop like it does randomly. His thought was that the head unit might have a self protection when a certain amount of distortion or not enough power is being outputted - thus the lowering of volume. He did note that after 28 on the volume the distortion became more noticeable and suggested an amp to supply the power to the speakers. I just don't have the cash or desire to add onto my credit card at this time....
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Old 05-01-2012, 01:32 AM   #13
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Well here is another question is this doing it on fm,cd,iPod or Bluetooth streaming?
Operating voltage:
14.4 V (10.5 V — 16 V allowable) Maximum current consumption: 10 A your installer should also test at the harness which they use Metra 70-6502 part, if my mind severs me correctly.

This should be tested on the radio interface side of the harness Chyrsler cars are known to some times have loose pins from the factory when interfaced into an aftermarket harness doesn't make a good connection this can also cause the same issues.
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Old 05-01-2012, 02:13 PM   #14
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Quote:
Originally Posted by twiggyman View Post
Well here is another question is this doing it on fm,cd,iPod or Bluetooth streaming?
Operating voltage:
14.4 V (10.5 V — 16 V allowable) Maximum current consumption: 10 A your installer should also test at the harness which they use Metra 70-6502 part, if my mind severs me correctly.

This should be tested on the radio interface side of the harness Chyrsler cars are known to some times have loose pins from the factory when interfaced into an aftermarket harness doesn't make a good connection this can also cause the same issues.
Occurs during iPod/iPhone Bluetooth streaming...

How do you check if there are loose pins... and where should they look? How is it resolved?

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