Original 604's were crossed at 1000(and are to this day perhaps the best sounding 604 particularly through the XO region).
2.3 Inductor on the LF. 9.1 cap on the HF. 9.1 cap/15 ohm resistor for the LF zobel and a 2uf cap across the hf wires. It's the only choice I have short of having them not sound good. 515's are garbage much above 1000hz. Still deafening and still working. even being driven with my 90 watt SS amp.
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Edit: I changed the HF cap to 9.1uf
Last edited by cradeldorf; April 29th, 2013 at 02:57 PM.
Original 604's were crossed at 1000(and are to this day perhaps the best sounding 604 particularly through the XO region).
Not all vegetables make good leaders.
I cross my g's at 1250, but I try to be very careful with the volume knob...
Unless you're running a mild slope like 6db/oct, you're probably safer than you think.Originally Posted by juniper
I'm not saying you should try to push your 300 watt amp to clipping on them, but i think your ears will tell you when you're stepping on the danger threshold.
Last edited by bowtie427ss; April 27th, 2013 at 09:14 AM.
Not all vegetables make good leaders.
Cradeldorf
I never did think of the 1600 XO freq as golden.To me the magic was how it sounds. If you would like to do some listening tests PM me.
Don
A buddy stopped over today and confirmed that they sound better than he's ever heard. Like I said over on AK if a 515 is indeed what the woofer section is, they are rated at 20-1000hz why they mated that with a horn that shouldn't be driven below 1600 is beyond me. Juniper All I'm gonna say is mine go well into the ear splitting level without batting an eye. I can almost hear them laughing.
Don they sound much more like they should this way.
I've read that 604 E to the last sectoral before the CD types were only providing driver loading to about 1900 Hz but the Altec standard Xover is 1600 Hz
I could never grasp the concept of loading since the phragm is barely moving in the first place and then every bit of air it is moving has to pass through 3 little human hair sized slits in the phase plug?
I can't imagine I could load the horn if I put my lips on the phase plug and blew as hard as I could. That is if my definition of loading means building some kind of back pressure from the air trapped in the horn tube and horn assembly itself. I would surely think the phase plug is what provides loading if there is to be any.
Last edited by cradeldorf; April 29th, 2013 at 01:46 AM.
Think of the diaphragm that is like a tuning fork.When you wrap on the edge of the tuning fork it puts out a lot of sound but you won't see it moving much.It is the tremendous amount of vibrations in such a short time that creates the output or (SPL).Or something like that.
Okay, that draws a better picture in my head. Thanks.
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