Design for Scan Speak Revelator + 8545k

[TEK]

hello

I'm getting a nice deal on the Scan Speak Revelator tweeter and the Scan Speak 8545K middel/woofer.

But I'm missing a design to use the drivers in. I'm looking for a monitor design.
The Scan Speak Reference Monitor (http://www.audiocomponents.nl/speake...-speak_eng.htm) is quite close, but it uses the 8546 middel/woofer.

Any help would be appreciated!


best regards TEK

[navin]

the design should work it is very simialr to a 8546-9700 pair i built some years ago.

[kasra]

Hello,

I remember seeing a design made by that guy Vance Dickason? the writer of those speaker cookbook series.

It was based on the 2 drivers you mention in a small monitor.
The kit was sold by partsexpress, and they also had the crossover published on the site, perhaps i have it somewhere in my computer.

/kasra

[TEK]

That would be nice. I have tried to find it on partsexpress, but with no luck.
So if you could publish it here or email it to me, I would be very thankful.

regards, Trond-Eirik

[cyclo]

I have tried the Dickason's Xover for 8545K+9900. Don't use it! My DIY supplier said to me that it couldn't work fine. I have not trust him and bought premium crossover parts. Shame on me.
There is a big hole at the xover point and no imaging at all.
Now, I have a pair of 8545K and 9900 revelator to design a brand new speaker.
Perhaps, could we share our work?

cyclo

[hifi]

Well... if it is a big steeeeep.. dip at the Xover point try reverse the phase of the tweeter



just my 2c

/micke

[TEK]

Thanks for your feedback. To bad that Dickason doesnt work to good.
What about using the Scan-Speak reference monitor desigh (http://www.audiocomponents.nl/speak...n-speak_eng.htm)
Would it be possible to just do some minor adjustments on the crossover, but keep the volume and element alignment?

I have no experience in cross over design what so ever, so I really need a complete and tested design.

I would be more than happy to share the design or any other information I'm able to get.

regards TEK

[cyclo]

It seems that the reference monitor xover could be modified for a 8545K/9900 combo. I have just tried with lowering the woofer coil value and adjusting the padding of the tweeter. Better than what I have done during this week.
Perhaps could we send our mails for direct communication.
cyclo

[cyclo]

Micke:
with reversing the polarity, I'm going from a deep to a broad peak. Too bad for me.
cyclo

[navin]

ok lets make this simple.

a lot of what i say depends on taste.

for the woofer keep the 10uf and try 1.5mh instead of 2.2uf
for the tweeter you can reduce L to about 0.7mh thought 0.82 will work fine and experiment with c from 3.3uf to 6.8uf.

i woudl make one change at a time. 1st change L1 to 1.5mh. if it is not forward enough change C to 4.7uf and if you still want more 6.8uf.

lastly the l pad i use is Rs=4ohms and Rp = 10ohms. most of my friends find this a bit laid back so you can adjust Rs to taste note that it changes the XO point too.

i would get a bunch of caps and resistors and maybe a few inductors and start playing. listen for atleast 2 days between changes. stick to 3 or 4 good recordings that cover acoustic, rock, blues, jazz and any other music you like.

hope this helps. As implied in my 1st post this Xo is good starting point. also i'd like to correct myself i used the 8546 with the 9500 not 9700.

enjoy this hobby if you get frustrated chill for a while and start when fresh it can be very infuriating chasing the holy grail.