Today's Message Index:
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1. 06:53 AM - Re: Loud tweeters....Is there an echo in here ? (Sqxpert@aol.com)
2. 01:15 PM - Re: Loud tweeters....Is there an echo in here ? (Dick Brussee)
3. 01:39 PM - Re: Loud tweeters....Is there an echo in here ? (Dick Brussee)
4. 02:13 PM - Re: Loud tweeters....Is there an echo in here ? (Sqxpert@aol.com)
Message 1
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| Subject: | Re: Loud tweeters....Is there an echo in here ? |
--> XDP4000X-List message posted by: Sqxpert@aol.com
i can honestly say that if you are running things @ 72db-
it could definately cause phaseing issues
i have a few settings in my car- and one of them , os @ all 72db
my center goes from being exact center, to going as wide as lc-to-rc and
maybe even some more than that
tim koehle
meca sql custom class
Message 2
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| Subject: | Re: Loud tweeters....Is there an echo in here ? |
--> XDP4000X-List message posted by: "Dick Brussee" <djpbruss@xs4all.nl>
Hello,
thanks for thinking with me....
Isn't there any test-CD title I can buy for this kind of tests ?
Dick
> Have you run a frequency sweep sample on your system since making your
> changes, listening to the levels of your channels, the transitions between
> your different crossover points, and the peaks and valleys of your
frequency
> response? If you haven't that'd be the first step I'd recommend. I'd say
> that you run the test at least through your highest crossover point, the
> higher the frequency, the more difficult it can be to make those minute
> adjustments, but it's always my first step I take after making any changes
> to my stereo. I have a program that can generate a frequency sweep if you
> need, but it get's pretty technical after you have to separate the
different
> frequency sweeps and their speed of the increase in frequency, track the
> ratio of time vs frequency so you know what sound you're hearing at what
> time, and to burn it to cd. But in any case, you'll be able to hear
> exactly what your ears think your stereo is doing (wrong). Anyways, good
> luck, let me know if I can help you out anymore.
>
> Bobby
>
>
> ----- Original Message -----
> From: "Dick Brussee" <djpbruss@xs4all.nl>
> To: <xdp4000x-list@matronics.com>
> Subject: XDP4000X-List: Loud tweeters....Is there an echo in here ?
>
>
> > --> XDP4000X-List message posted by: "Dick Brussee" <djpbruss@xs4all.nl>
> >
> > Hello XDP people,
> >
> > I was the one with the loud tweeters.... Well, I've done it ! I have
> rewired my carstereo....
> >
> > After days of tuning (it never sounds right) I find it sounding like an
> echo. especially when the music has a little echo in it itself. The sub is
> sometimes too loud, sometimes I hear no sub where I should hear sub. And
> sometimes the bass of the sub is perfect !
> >
> > I typed in all the inches from ear to speaker.
> >
> > I have :
> > high : 2 tweeters - 4.00 khz -24db/oct
> > mid : 2 woofers front - 78 hz -36 db/oct <-> 4.00k -24 db/oct
> > low : 2 woofers in the back of the frontdoor which I use as :
> > 78 hz -72 db/oct <-> 500 Hz -72 db/oct
> >
> > And the sub : 78Hz -72 db/oct
> >
> > High -1 db l+r
> > mid 0 db l+r
> > low -10 db l+r
> > sub 0 db l+r
> >
> > What am I doing wrong here ?
> >
> > Dick Brussee
> >
> >
>
>
Message 3
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| Subject: | Re: Loud tweeters....Is there an echo in here ? |
--> XDP4000X-List message posted by: "Dick Brussee" <djpbruss@xs4all.nl>
Ok, the amps are XM-4045's from Sony... I have them quite a while now. I
only use the crosovers from the xdp4000x
D 36 Left 53 Right
C 37 left 56 right
B 30 left 47 right
A 63 left and 63 right
I tell you about the -10 db.... When I did that, the echo was less
irritating, so I think I should disable those speakers and have a 2-way at
the front and the sub only at the back.... I think that's much better, but I
will try it once the wetter gets better over here.....
Well, that's it for now..
Thanks for thinking with me....
Dick Brussee
> --> XDP4000X-List message posted by: Randy Visentine
<jvisentine@yahoo.com>
>
> Hi!
>
> What amps are driving what drivers, and do any of the
> amps have any kind of DSP built in (Like Fosgate's
> newer X series).
>
> If you are getting an "echo", it sounds like either
> you have a distance parameter WAY out of spec, or your
> amps are somehow delaying the signal relative to each
> other. You are sure you have the correct output
> (A,B,C,D) feeding the correct amp and so forth?
>
> I have yet to "Fine Tweak" my system, but even with
> the exact distance measurements entered, I get a
> fantastic center image, but stereo width is slightly
> narrow. I MUCH prefer an accurate center image over
> "hyped" L/R seperation anyday! No "Echo" issues here
> with a bi-amped front, an "inconspicuous" rear fill
> set-up, and a sub cluster. Go figure.
>
> Just out of curiosty, what are your distance settings
> per channel, per side (A Left = ?"; A Right = ?",
> etc.)
>
> One more thing, I would mirror the 36dB slope on the
> mid-range for the "woofer" in your door. As it
> stands, your "Mid" is actually getting more bass than
> your "Woofer" since the woofer has a steeper low-end
> cutoff of 72 dB at 78Hz. And why do you have the
> "Mid-Bass" out set to -10dB relative to the others?
>
> Since these drivers overlap in the 78Hz - 500Hz
> region, you will end up with phase issues if the
> delays are different for these channels (80Hz will be
> in phase from the front to the rear of the door
> without any delay, adding delay will screw up the
> phase in the low mid-bass region). You might want to
> throw a second active crossover (or use the amp's if
> it has one) to cut off the woofer WAY lower (like 150
> or 200Hz) - this will reduce phase issues in the upper
> midrange if the delays are set identical for mid-bass
> reinforcement. I find 250Hz gets Boomy really quick,
> and midrange drivers usually do just fine in this
> range without any help from a woofer. If only the XDP
> had more x-over frequencies live the XES - I'd be in
> heaven!
>
> Anyway, good luck!
>
> Later,
> Randy V.
> C90 + 4000X
> C910 + 210EQ
>
> --- Dick Brussee <djpbruss@xs4all.nl> wrote:
> > --> XDP4000X-List message posted by: "Dick Brussee"
> > <djpbruss@xs4all.nl>
> >
> > Hello XDP people,
> >
> > I was the one with the loud tweeters.... Well, I've
> > done it ! I have rewired my carstereo....
> >
> > After days of tuning (it never sounds right) I find
> > it sounding like an echo. especially when the music
> > has a little echo in it itself. The sub is sometimes
> > too loud, sometimes I hear no sub where I should
> > hear sub. And sometimes the bass of the sub is
> > perfect !
> >
> > I typed in all the inches from ear to speaker.
> >
> > I have :
> > high : 2 tweeters - 4.00 khz -24db/oct
> > mid : 2 woofers front - 78 hz -36 db/oct <-> 4.00k
> > -24 db/oct
> > low : 2 woofers in the back of the frontdoor which I
> > use as :
> > 78 hz -72 db/oct <-> 500 Hz -72 db/oct
> >
> > And the sub : 78Hz -72 db/oct
> >
> > High -1 db l+r
> > mid 0 db l+r
> > low -10 db l+r
> > sub 0 db l+r
> >
> > What am I doing wrong here ?
> >
> > Dick Brussee
> >
> >
> >
> > http://www.matronics.com/archives
> >
> >
>
>
> __________________________________
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>
>
Message 4
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| Subject: | Re: Loud tweeters....Is there an echo in here ? |
--> XDP4000X-List message posted by: Sqxpert@aol.com
test cd- check any local pro audio shop in your town , i m pretty shure they
should have something that will work for you
happy t- day everyone(im full!)
tim koehle
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