[James]

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--

[Don Pearce]

On Sun, 27 Apr 2008 12:48:04 -0400, "James"
wrote:

James, I think you will have a much better chance of a decent answer
in a group that is specifically about car audio - I know they are out
there, but I don't know any names.

d
--
Pearce Consulting
http://www.pearce.uk.com

[Eeyore]

James wrote:

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.

Because it has an open top and therefore there's almost no bass ?


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.

'Many folks' are talking out of their backsides. Also the power ratings for car
audio are hugely inflated compared to hi-fi etc. Typically the power output is
measured at around 10% distortion !


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.

Good idea.


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.

More info needed.

Graham

[James]

More info, huh ? I typed six pages, do you want 50 ?? What else could I
tell you ? I told you about my new HU, new speakers/ type of
car.... tweeters/ distorted sound/ polyfill.. etc

Would my name, rank, and serial number now help ?

Egads ~!!!!!

---------------------

More info needed.

Graham

[Richard Crowley]

"James" wrote ...
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.

Are you absolutely positive that you wired the speakers
and the crossover properly? You symptoms could be
explained by getting the crossover backwards.

[James]

I am very sure. The only way they could be wired wrong would be if they
were improperly marked to begin with. This would have to be the case for
the front and rears.

James

[WindsorFox[_3_]]

James wrote:
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.


rec.audio.car is --- that way.

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