A theoretical question ... with the 2 low woofers mounted upright and vertical there would be relative more baffle at the sides ... would that be significant
Personally I would consider the 8x12 W8Q fore bass and one of the paper coned 6x9 fore mid duties
btw ... you know, those 6x9 drivers are pretty small
Personally I would consider the 8x12 W8Q fore bass and one of the paper coned 6x9 fore mid duties
btw ... you know, those 6x9 drivers are pretty small
Circumvent ? I had to look that up to be sure 
The TB 6x9 W69-1213SC has Fs=55hz
I am no wizard at OB calculation, but it will probably roll off early enough not to get into trouble with its Xmax
Your XO point would be somewhere around where its 6db down ... if active is used on woofers solely ... but I would probably cross it passively a bit higher
Your idea of doing a 2.5way may be ok, but the driver you have chosen is only recommended up to 350hz ... by Tangband ... you may have to buy a single driver to experience if it sounds any good going higher ... it IS rated as a sub woofer, which it really isnt either, so it really hard to predict anything
The TB 6x9 W69-1213SC has Fs=55hz
I am no wizard at OB calculation, but it will probably roll off early enough not to get into trouble with its Xmax
Your XO point would be somewhere around where its 6db down ... if active is used on woofers solely ... but I would probably cross it passively a bit higher
Your idea of doing a 2.5way may be ok, but the driver you have chosen is only recommended up to 350hz ... by Tangband ... you may have to buy a single driver to experience if it sounds any good going higher ... it IS rated as a sub woofer, which it really isnt either, so it really hard to predict anything
Hi Oliver,
You have got a lot of suggestions for your Baffle, but anyway it is still unclear how you will drive the speakers ! Is it active and with good possibilities to shape response. Is it passive, it is already dead. You have to evalutate possibilities carefully to be able to design something really good.
/Erling
You have got a lot of suggestions for your Baffle, but anyway it is still unclear how you will drive the speakers ! Is it active and with good possibilities to shape response. Is it passive, it is already dead. You have to evalutate possibilities carefully to be able to design something really good.
/Erling
My understanding is that its a 2.5way with a small fullrange doing tweeter action
The idea is OK, I only question the choice of a heavy coned sub driver doing midrange
Understandably to get better low end, but it might compromise the midrange too much
You may have to let go of some of the low end to get the mids, hence you may get better low end in a straight 2way with a dedicated woofer
But as I said, its impossible to predict
The idea is OK, I only question the choice of a heavy coned sub driver doing midrange
Understandably to get better low end, but it might compromise the midrange too much
You may have to let go of some of the low end to get the mids, hence you may get better low end in a straight 2way with a dedicated woofer
But as I said, its impossible to predict
skorpion said:
Hi Erling,
i guess i'll build the dead one first ...
I havent done any crossover simulations up to now,
but first idea is as folllows:
The subwoofer pair of drivers is connected in series,
using an additional series resistor R1.
The mid-bass pair is connected in series, using an additional
series resistor R2.
R1 and R2 need not be exactly the same.
Each pair of drivers will be selected to have fs as close as
possible. Differing fs between pairs are uncritical, the 2 pairs are
in parallel.
The voice coil inductance of each pair is used as integral part
of the lowpass, each series pair has an inductance
of 2x3,2 =6,4 mH.
A big capacitor parallel to the subwoofers is the first low pass.
(<180 Hz)
A small capacitor parallel to the mid-bass drivers is the second
low pass. (300 ... 900 Hz dependent on tweeter used)
Then i will see, which peculiarities occcur in that network and
think further ...
The frequency response of the system below 300 Hz will
be influenced strongly by positioning relative to the walls
and room gain ... scientific calculations concerning +- 3 db
are useless IMO.
Kind regards
I think I will repeat myself, In the other thread I stated that the only TB units I really want to use in OB would be W3-1364 and W4-1320, none of the woofers is really suitable. You could build BR or Closed Boxes for them, and they will perform to specs. But in OB I think it is waste. Of course you could equalise then I think you really would have to have 4 low mounted units, to achive what you may want in bassperformance ? 
/Erling
/Erling
tinitus said:
Hi tinitus,
no no no no i dont want to let go the low end
.Your proposal of a specialized woofer is OK.
But i like to omit a highpass for the midrange.
Pure mass of the cone is not the problem i think.
Cone breackup may be an issue and of cause the
high Le has to be dealt with ...
I heard my subwoofers without crossover sometimes,
just for fun, i have some confidence in the midrange
behaviour of that diaphragm.
Regards
skorpion said:
Hi Erling,
what you say is true.
What is missing is cone area and a higher Qts.
Both are delivered by the concept (by using 4 units
and using series resistors).
Now the driver is suitable ... it is a network i am building,
not a demonstration speaker for the manufacturers
intended purpose. I already use the TangBand W69 1042
in a BR sub.
Using it in OB is just an example for using a unit far from
its original pupose to achieve something different.
If the result can be achieved i don't care concerning the
manufacturers purpose for the drivers.
How many drivers are proposed in the DIY community as
suitable for OB use, which have ridiculous cone excursion ...
Compared to some concepts this one is on the save side for
"moderate level home listening".
Cheers
Hi there,
btw. this is the ribbon tweeter i want to use
http://www.diyaudio.com/forums/showthread.php?postid=1533832#post1533832
800 Hz XO is lowest i can go with that, maybe sometimes
i'll build a larger one.
These are historical archetype speakers to compete
with in living room integration and sonic behaviour ...
Cheers
btw. this is the ribbon tweeter i want to use
http://www.diyaudio.com/forums/showthread.php?postid=1533832#post1533832
800 Hz XO is lowest i can go with that, maybe sometimes
i'll build a larger one.
These are historical archetype speakers to compete
with in living room integration and sonic behaviour ...
Cheers
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