"James" <jnipperxxx@[EMAIL PROTECTED]
> wrote in message
news:W_CdnYZUEaV_dY7VnZ2dnUVZ_jadnZ2d@[EMAIL PROTECTED]
>
>
> Perhaps some of you experienced guys can give me some ideas as to why I
am
> not
> satisfied with my updated HU and front/rear speakers in my 1997 Jeep
> Wrangler.
>
> My HU is the Alpine 9857. This radio is rated at 18 watts per
channel,
> but many folks
> consider that a very conservative rating on this particular HU. I am
not
> yet running an amp, although I plan to install one, probably a 4
channel
> amp of at least
> 70 watts per channel. But, I don't want to install an amp until I
> understand why I am not
> getting anywhere near "decent" sound with what I now have.
>
> Please note that I am an older gent, and I am not trying to play music
for
> someone
> a mile away to enjoy. I just want a decent stereo in this particular
> Jeep.
>
> FRONT SPEAKERS:
>
> I purchased an adaptor so that I could replace the front 4 X 6 speakers
> with the Polk Audio DB5250s, which is a 5 1/4 inch speaker with a
> separate tweeter and crossover unit. Before choosing this speaker, I
> read **many** reviews that rated these speakers very very highly.
Yes,
> the reviews pointed out that this size speaker doesn't produce HUGE
> bass,
> but of course that couldn't be expected from any speaker this size.
But,
> every review that I read said that these speakers perform way beyond
their
> size, and are fantastic.
>
> I also installed polyfill in the front dash, in the area above, below,
> behind, and all sides of these front speakers. I did this because many
> folks
> reported that this improves the bass response.
>
> RESULTS-- these speakers really seem dull, and dead. I don't know any
> better way to explain it. To be more specific, they seem to have
> **almost
> no** bass response. Once again, I know that they cannot have huge bass,
> but
> I have heard other speakers of this size that have three times the bass
> response.
>
> Equally puzzling, the tweeters themselves (separates) actually distort
> the
> music.
> When I say distorted, I mean fairly strong distortion, on some music
> passages.
> They don't seem to distort all the time, but they are significantly
> distorted. ( some users say these tweeters are a bit too "bright", and
I
> have cut down on the treble to account for this).
>
> I have double-checked the hookup wiring, including the phasing, etc etc.
> As far as I can tell, I have everything right, left and right. (The
two
> sides seem to perform the same).
>
> Now here is the most weird part........... the sound (I will review the
> rear
> speakers below) the sound is so bad.......... it actually sounds so
> tinny
> that
> it gives me a headache. The entire sound is so tinny and
> distorted-sounding,
> It is very very hard to explain... it just sounds BAD.
>
>
>
> REAR SPEAKERS IN ROLL BAR:
>
> I installed Polk 5 1/4 inch coaxial speakers in the rollbar. (Model
> MMC525s)
> There is rubber type material in the rollbar, so I didn't want to try
to
> remove that to put
> polyfill in like I did in the front. Just like the front, there is
NO
> bass in these speakers, and
> in general they sound awful. If I play at just barely a decent volume
> level
> (Not Loud) they
> distort terribly.
>
>
> OK, PLEASE NOTE: I am 100% aware that this is a JEEP, and that
these
> are not
> large speakers. But, the entire sound in this Jeep with four 5
> 1/4
> inch speakers is
> just rotten, to the point of giving me headaches. I can't stand to
listen
> for more than about
> ten minutes. I have a 2000 Jeep Grand Cherokee with an Infinity sound
> system, and it
> sounds ten times better, seriously. I can listen to it all day. I
also
> know that I will never
> get equal sound from a Jeep Wrangler, but I should be able to get
> **decent** sound with
> what I have installed, or so I thought.
>
>
>
> ---------------------------------------
>
> I guess there are several possibilities:
>
>
> 1. Bad HU, causing distortion in the highs and lows.
>
> 2. Bad crossovers.
>
> 3. Bad tweeters on these brand new speakers, front and rear.
>
> 4. Too much polyfill in the front, not allowing speakers to push
enough
> air, thus
> restricting the bass.
>
>
>
> --------------------------------------
>
> Can you guys give me some advice, and/or comments ? Any other
> possibilities other than the 4 items that I have listed above ?
>
> Yes, I know that any good speaker system will sound better with an amp.
> But, nearly all of the user-reviews that I have read, indicate that
these
> speakers will do a fine job with 18 watts per channel. Also, I
think
> that the improvement from an amp would be mainly in the bass and mids/
> but
> not sound from the tweeters, right ? I clearly don't mind installing
> the
> amp
> next, but it seems crazy for me to move forward at this point until I
have
> the
> basic system sounding decent.
>
> Thank you very much for any additional thoughts or ideas. I want
decent,
> good-quality sound, that I can play medium-loud. I am an older gent,
and
> don't listen to rap , rock, or other extremely loud music. But, I do
> know
> decent sound when I hear it, and at this point, these speakers don't
even
> come near what I had hoped for.
>
>
> HELP PLEASE !!!!!!!!!!!!!!!!!!
>
>
> --James--
>
>
>
Hello James
Have you checked to make sure all the speakers are in phase?
Just having 1 speaker out of phase will have a canceling effect on the
rest
of the speakers.
The most noticeable is in the bass response.
The speaker(s) out of phase could be connected wrong at the speaker or the
radio
try fading front to back and see if one set sounds better than the other.
you can also try fade and balance to 1 speaker and see if just one sounds
better.
I believe these are the speaker colors and polarity in your vehicle
Right Rear Spkr (-) Blue w/ Orange Stripe
Right Rear Spkr (+) Blue w/ White Stripe
Left Front Spkr (-) Brown w/ Red Stripe
Left Front Spkr (+) Green
Left Rear Spkr (-) Brown w/ Blue Stripe
Left Rear Spkr (+) Brown w/ Yellow Stripe
Right Front Spkr (-) Blue w/ Red Stripe
Right Front Spkr (+) Purple
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