Project Finally under way

[timc]

The swedish beauties have finally arrived. Matsj have provided me with a pair of gorgeous H9800 clones. The 2435HPL i purchased earlier.

Hooked them up yesterday just for some prelimnary testing and they sound great. I'm crossing them over at 1khz and using the 126A woofer in my L65's for the lower octaves. I still have to do some sensitivity adjustment to the horn and tweak the crossover point a bit, but for a first try I think it sounds quite good. I wont have time to do anymore before over the hollidays but i think the rest of the winter will be very exciting. Hi-Fi wise at least


-Tim

[Joe Alesi]

The swedish beauties have finally arrived. Matsj have provided me with a pair of gorgeous H9800 clones. The 2435HPL i purchased earlier.

Hooked them up yesterday just for some prelimnary testing and they sound great. I'm crossing them over at 1khz and using the 126A woofer in my L65's for the lower octaves. I still have to do some sensitivity adjustment to the horn and tweak the crossover point a bit, but for a first try I think it sounds quite good. I wont have time to do anymore before over the hollidays but i think the rest of the winter will be very exciting. Hi-Fi wise at least


-Tim

Hello Tim,

You have conquered the hard part- getting started. Sounds like a great project- good luck and please share some progress pics when possible. I just noticed you are a K2 s9800 fan. Me too. Any chance of a big MTM for you along the same lines- using the H9800?

[timc]

Hi.

Yes. The hardest part is indeed getting started

Im not going MTM. When i can afford it ill try to get a pair for 1200FE woofers. My inspiration is Greg Timbers Personal system. But without subs.

I dont have a digital camera myself, but i will try to borrow one over the hollidays.

The 126A is just a temporary solution.


-Tim

[timc]

Hi.

Im going to put together a temporary passive crossover now, and im a bit confused about polarity.


Im going to use a 2nd order butterworth at 1000hz. The schematics says to inverse the polarity on the tweeter. The compression driver says to put the negative wire on the positive connector for positive compression.


Does this result in that i should put the positive wire on the positive terminal?


Edit: Have changed to 2nd order.


-Tim

[Robh3606]

Hello Tim

Nice set-up!! If positive compression is towards the throat then hook them up that way. The 126A should be JBL polarity which is opposite the rest of the world. Just take a 1.5volt battery and verify the polarity of the woofer.

Rob

[timc]

Hello Tim

If positive compression is towards the throat then hook them up that way.

Rob

How do i know if this is the case? Positive compression in this context could mean both ways. Is there a standard for compression drivers?


-Tim

[vernb]

Hello Tim,

You have conquered the hard part- getting started. Sounds like a great project- good luck and please share some progress pics when possible. I just noticed you are a K2 s9800 fan. Me too. Any chance of a big MTM for you along the same lines- using the H9800?

Hi Tim
What is MTM ?
Cheers
Vernb

[timc]

Not sure about the exact phrase, but i think it plays on the D'appolito configuration with a tweeter in the middle of two midranges. Midrange-Tweeter-Midrange.


In the JBL case it should maybe be WTW.............



-Tim

[pos]

Hi Tim,

How is your project going on?

did you use the compensation filter Zilch described here?
http://www.audioheritage.org/vbulletin/ ... stcount=84

and curves:
http://www.audioheritage.org/vbulletin/ ... stcount=79

I am curious on how these turn out on matsj's H9800 clones

[timc]

Sorry for not answering you Pos. Havent checked the thread for while.

An update. I have now done some more work with the crossover. I started out with GT's notchfilter and the additional paralell notch that Zilch implemented, and then altered some values untill i got some half decent results.

I found out that my school has an older version of Clio. That speeded things up a bit.

The horn now has respons of +- 2.5dB from 1KHz to about 15KHz. Im satisfied with that for now. Ill post a graph in a day or two. Next step is to match the Woofer to the horn.

However I am wondering how Zilch and 4313B manges to get the measurements they get. No matter how i tweaked the filter, i just couldnt get it flatter. Thats just probably me not grasping it fully, but anyway :dont-know. I will go another round with it at a later point.

Could it be due to small differences between the Clones i got from Matsj and the original H9800 Zilch did the measurements with?

A question for the knowledgeable to finish: I initially intended to get the 1200Fe woofer for my project, but due to price and availability I might reconsider. What would be your recomended woofer for this 2 way system? LE14-h3? I'm not after the extreme bass extension, but rather a very quick, precise sound. An bassextension down to about 35Hz is enough for me. I will add a sub at a later point.

Thats it for now. I'll try to get both filters up and running during the next week. Needless to say I'm very excited




-Tim

[pos]

Earl, here is Zilch's filter for the 2435/H9800 combo :

did you use the compensation filter Zilch described here?
http://www.audioheritage.org/vbulletin/ ... stcount=84

and curves:
http://www.audioheritage.org/vbulletin/ ... stcount=79