D3004/6600 burn in

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diypass

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Joined 2012
#1
do someone of you experience on Scan speak d6600 burn in ?
how may hours it needs ?

it looks like harsh sounding,
are there chances that it will improve its performance ?
many say that it is not harsh tweeter but i find it very harsh

the filter and the system is really ok
 
#2
https://www.madisoundspeakerstore.com/scanspeak-soft-dome-tweeters/scanspeak-illuminator-d3004/6600-aircirc-tweeter-textile-dome/

Looks quite bright at the top! Sort of thing a Zobel around 4R and 1.5uF would fix: Impedance Equalization (L-Pad) Circuit Designer / Calculator

Quite a big Fs bump too. Troels used a LCR to correct that and probably align phase better:
Ellam-FLEX-3W

It might be that an attenuator could fix most of this in one go. An overly bright tweeter always irritating. But don't discount that what you are hearing might be coming from the woofer. You can put your hand over the tweeter and listen to the woofer.
 
#4
A bit of a checklist.

All cables tight? All joints well soldered. Crimps tight.

Amplifier output bias within spec and not wandered? You have to know what you are doing with that one. It's a small voltage you adjust when amp is warm.

Some of the early bitstream DACs were quite rough sounding. Like the Rotel RCD-965BX.
 
#6
my tweeter filter is 6.8uF in series + 0.27mH in parallel : the crossover point id very hight for that tw also without rlc correction
is only tweeter that sound harsh ather drivers are perfect.
does burn in could change its harsh sound ?

how, i don't understand why if i buy no ferrofluid tweeter i must add rlc
ok for fs peak but at this point i'll buy tweeter with ff
what do you think about ?

i've seen d9700, d9900.....ring radiator.....and other scan tw which have the same or hightest fs peak that have been filtered without rlc or rc network
i mean also commercial brand
 
#8
system7 said:
A bit of a checklist.

All cables tight? All joints well soldered. Crimps tight.

Amplifier output bias within spec and not wandered? You have to know what you are doing with that one. It's a small voltage you adjust when amp is warm.

Some of the early bitstream DACs were quite rough sounding. Like the Rotel RCD-965BX.
Click to expand...
No, everything is temporary for now
why this question ?
 
#9
No, the filters i know of, have no RLC filters. My experince is that the RLC filter togehter with tweeters with high Q FS resonance point gives a harsh sound. I would remove it, If I were you. Make sure you HP-filter roles off the tweeter frequence responce before FS.

I think the reason for the harsh sound is because this FS resonance is tryed to be removed with another resonce RLC circuit. So you will try to remove reconances with another reconant circuit, it looks very nice on paper put will not occure in practis, since both circuits will resonate uncontrollede, delivering energy from one circuit to the another when exited. This is just my therory!
 
#10
Hylle said:
No, the filters i know of, have no RLC filters. My experince is that the RLC filter togehter with tweeters with high Q FS resonance point gives a harsh sound. I would remove it, If I were you. Make sure you HP-filter roles off the tweeter frequence responce before FS.

I think the reason for the harsh sound is because this FS resonance is tryed to be removed with another resonce RLC circuit. So you will try to remove reconances with another reconant circuit, it looks very nice on paper put will not occure in practis, since both circuits will resonate uncontrollede, delivering energy from one circuit to the another when exited. This is just my therory!
Click to expand...
yes!, i'm agree with you, rlc gives harsh sound, but i haven't rlc filter
as i wrote above my filter is the following simple 12db :
- 6.8uF in series
- 0.27mH in parallel

what do you think about ?, why do they sound harsh (no rlc notch)....does it needs burn in ?
 
#13
Many people have used the 6600 and have not commented about harshness. It's all in the crossover and implementation.

If it sounds harsh then something is wrong with your crossover.

Is this a commercial kit or have you designed this yourself? Is this designed properly by measuring the system first and then designing the crossovers so suit or have you simply cobbled something together?
 
#14
5th element said:
Many people have used the 6600 and have not commented about harshness. It's all in the crossover and implementation.
If it sounds harsh then something is wrong with your crossover.
Click to expand...
ok, but where ?
mine is 12db 6.8uF + 0.30mH

5th element said:
Is this a commercial kit or have you designed this yourself? Is this designed properly by measuring the system first and then designing the crossovers so suit or have you simply cobbled something together?
Click to expand...
is my design....all is perfect only tweeter has this problem
in the past no problem wiht dynaudio tw
 
#15
Then all isn't perfect. Get your measuring equipment out and find out why.

What drivers are you using in the rest of the design?

I've no idea if your 6.8uf or 0.3mH is doing a good enough job, I don't have the measurements of your drivers in your loudspeaker.
 
#18
diypass, It is no kit that I have heard. but some of my friendts use to use this tweeter in there speakers.
I agree with 5th element we need to know more about your design to help. Show some meassuring curves from clio, let us know the polarity of you drivers connected to the cross over and so on.

The Scan speak tweeter is more revealing than any old Dynaudio tweeter filled with magnetic oil, but it is also more demanding on getting the filter right.
 
#20
A friend had this problem with 6600. I took the tweeters to test. One was fine the other sounded harsh, nasal, and showed Impedance plot aberrations. I took it apart to see if anything obviously wrong, nothing. I put it back together and the Impedance plot looked better. Weird. The only that thing changed was the screws. So I experimented with the tightening of the screws and found that too tight front faceplate screws caused the problem. I loosened the screws a little and the problem was gone. The screws were too tight. They should not be loose, but not torqued too much. Maybe when too tight it warps the motor assy and causes some rubbing?
 
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