My JBL 4355 build

[.:hb:.]

Any plan to use a digital crossover unit?

Absolutely not. 90 percent of my music comes from a turntable, and I like to keep things analog. And please let's skip the "But most of your vinyl is derived from digital material" discussion .
If I'd feel the need to make substantial changes to the filtering, I'd be able to do that in the analog domain. But at the moment I don't feel the need to. That speaker just sounds exactly as wrong as I like it to .

[pos]

That speaker just sounds exactly as wrong as I like it to .

way to go

[martin2395]

@hb,

You should try the Bryston 10B crossover, I've had a Driverack PA2, DCX2496, UREI 5235, and a fully hot rodded BSS FDS-360 and the Bryston really is in another leagure.
The quality of your active xo has a major impact on the horn and the supertweeter.
Those beauties deserve the best

[.:hb:.]

The Bryston is next on my agenda. I know someone who owns one and is hopefully willing to borrow it for a few days.

[martin2395]

Sounds like a plan!

It was the first active crossover I bought that I couldn't actually hear whether it affected the sound quality or not.

[Ralf]

Great build! I bet there's not many of those in Germany.

Is that last pic at the Triode Fest? Looks like a whole lot of speakers of different types on hand.

There is already the next pair in the queue...I picked up all chassis needed for this project. The four 2235A are back now from remagnetizing, two of them still have to be repaired.
Today I bought a Weeke Optimat BP 12, a CNC wood worker machine...the project can be started soon...

Cheers
Ralf

[JeffW]

Good deal! Glad to see these builds popping up, look forward to hearing about yours.

[Mr. Widget]

Today I bought a Weeke Optimat BP 12, a CNC wood worker machine...the project can be started soon.

I just did a web search. That is one hell of a machine! Is this for your hobby or business? With a machine like that you could definitely crank out the speakers. Does it have three axis capability?


Widget

[ivica]

There is already the next pair in the queue...I picked up all chassis needed for this project. The four 2235A are back now from remagnetizing, two of them still have to be repaired.
Today I bought a Weeke Optimat BP 12, a CNC wood worker machine...the project can be started soon...

Cheers
Ralf

Hi Ralf,

That is for the first time to hear that 2235A ever exist. On the other thing, to be re-magnetized....may be talking about 2231A....

ivica

[.:hb:.]

Yes, I was also wondering... Never heard of the necessity to re-magetize a ferrite motor.

[martin2395]

Sounds like A 2231A chassis with 2235H cone for me

[Guido]

That is for the first time to hear that 2235A ever exist. ivica

Come on boys!
.... Martin was faster but ....

"2235" stands for C8R2235 (Original of course). We do not make compromise here
"A" stands for Alnico core, thus the need for re-magnetize. In this case its a K140 core.

And
No, the K140 is -unlike the E140- not to strong for the C8R2235 kit. It is a substitude for the 2235 core and shows exactly 1,20T after remagnetize.

Yes, the 2 unfinished woofers lying around here and waiting for me to FINALLY get them done.

[Ralf]

I just did a web search. That is one hell of a machine! Is this for your hobby or business? With a machine like that you could definitely crank out the speakers. Does it have three axis capability?


Widget

It is just for fun...this is a machine owned by a friend of me who has a local wood worker factory. I helped him in the past to keep the machine up and running. Some weeks ago there was a problem with two broken coolers which caused an overheating of the controller CPU. He could not wait until a used part is available on the net and he decided to order a new machine. In the meanwhile we got a spare part, the machine is up and running again but he has no room for a second one. This was my chance to get this big iron for small money...
and yes, it is a three axis CNC with tool changer and all what is needed to build lots of speakers in the future...

Cheers
Ralf

[.:hb:.]

Whatever you do - just don't open a speaker company. There are far too many out there, and all of them want to become rich from the German market. Hint: Doesn't work...

[ivica]

Come on boys!
.... Martin was faster but ....

"2235" stands for C8R2235 (Original of course). We do not make compromise here
"A" stands for Alnico core, thus the need for re-magnetize. In this case its a K140 core.

And
No, the K140 is -unlike the E140- not to strong for the C8R2235 kit. It is a substitute for the 2235 core and shows exactly 1,20T after re-magnetized.

Yes, the 2 unfinished woofers lying around here and waiting for me to FINALLY get them done.

Hi Guido,

Now everything is clear, so it is K140 'basket' with C8r2235 recone kit used. Are You planning to use mass-ring or not.
Anyhow , due to AlNiCo magnet applied, power 'overload' has to be prevented.

regards
ivica