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Weak midrange sound

 
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Old 09-22-2013, 02:06 PM
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Weak midrange sound

When I got my 98 Prelude, the original speakers were completely rotted out, so I replaced them with Pioneer components (all six speakers). I simply used the original harness as much as possible, and kept the rear microphones intact by fastening them to the rear speakers in the same position as the originals.

My sound is very balanced, and I have nothing to complain about (such as the fronts being louder than the rear, etc.) However, I have a couple other issues:

First, when I adjust the fade to the rear, and then try to single out left and right, both speakers decrease volume equally. Is that just because the AFBS makes the rears mono?

Second, while the volume levels are balanced, it seems like I only have highs with a decent amount of lows. My midrange seems exceptionally weak. Does this have anything to do with the AFBS, or is it just my speaker choice, or is it my OEM head unit?

I'm relatively new to audio improvement, but I love good sound and I'm learning. Any help is appreciated.
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Old 09-22-2013, 03:28 PM
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Re: Weak midrange sound

Could be any one of the issues you mentioned at the end there, I dont believe it is the head unit. Sound quality can sometimes suffer harshly if the polarity is not correct. Check the connections to make sure you hooked up + to + and - to -
Further than that, you run into the "GIGO" effect, garbage in garbage out, one of the components is failing you. Speaker, head unit, afbs, even speaker wire.
What model are the component speakers, they are decent ?do they have an external crossover, have u set it to hi-pass mistakenly ? Check those things out, and from there we can isolate the problem.
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Old 09-23-2013, 12:49 PM
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Re: Weak midrange sound

You dun good by keeping the factory wiring intact. But the afbs is a finicky bit of engineering that most typical car speakers can't adapt to.

The afbs rear speakers and amp are monophonic and therefore offer little overall fidelity. The sound you seek needs to come from the front of the car.

The rear speakers are a 2ohm system, thereby that little 75watt amp can do a lot but not perform miracles. Your speakers should be rated for 4 ohms or even 2.
The mics in the rear listen for distortion and reduce volume levels until distortion is gone. It starts with reducing bass notes first. Then corresponding frequencies until no distortion is detected.
So... if your head unit is distorting, the afbs will reduce levels as it 'thinks' it needs to.

Now to your midrange issue... the front speakers you bought are slim line? In order to fit into into factory holes they need to be. If that's the case I'd say your front speakers are the weak spot. The oem were generally for mid/upper range since the bass mainly came from the rear. And the tweeters took up the slack in the upper range.

If possible find some midrange speakers for your doors. And if your 6x9's are full range, check into 6x9 woofers.

http://www.parts-express.com/pe/show...number=264-837

http://www.parts-express.com/pe/show...number=290-399

Here's a place to start.
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Old 02-23-2014, 04:59 PM
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Re: Weak midrange sound

Hey guys, it's been a while since I've been on here (hence, reviving the old thread). I've just been reading up some more on audio stuff and it kind of renewed my interest.

Static420, yes the polarities are correct, and unfortunately these speakers don't have external crossovers. I wish I had some more adjustability like that.

The speakers in my Prelude are Pioneer TS-A1604C (front components), TS-A6964R (rear 6x9 3-ways). From the reviews I read online most people say that they are good all around speakers. I know sound is pretty subjective, but I find them lacking in mid-range. However, what I've been thinking about it that often they sound decent when I'm not moving. It's when I drive and get all sorts of road/wind/engine noise that it seems to cancel out the lower frequencies and the sound system sounds a bit harsh.

I think the only way to get around it at this point is a). Get a new HU, amp, and run better wiring, or b). install some dynamat or other sound deadening material to try to quiet down the road noise.

FYI, the speakers I am using are 4 ohm. I know the stock system has 2 ohm rear speakers, but are the OEM front speakers 2 ohm as well? I would assume so, but I'm just curious.

This post is mainly to just tie up the loose ends. I hate it when threads are left unfinished. Thanks guys!

Last edited by CB900fer; 02-23-2014 at 05:02 PM.
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Old 02-24-2014, 04:14 PM
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Re: Weak midrange sound

I was running alpine type s 6.5 till now. Of a jl audio jx 360 4 channel.. They lacked mid too. I upgraded yesterday to Hertz hcx 165 yesterday and it filled in everything nicely. Very light cone material, it's responsive and clear. I recommend looking at them.
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