2 octave above Fs 1360

[Cousin Billy]

I have done my search, and can't locate an answer.

If my tweeter has an Fs of 1360 Hz, what is the hz 2 octave's above that?.

My mid for this 3-way has an Fs of 73Hz, what is considered 2 octave's above this?.

[sreten]

Hi,

2 octaves is 4 times the frequency, each octave doubles.

/sreten.

[Jay_WJ]

If you need to know this in order to find a suitable crossover point, note that this is an old idea that was useful when we only relied on textbook formulas. These days with computer tools available, there are always a way or two to use a tweeter with highish Fs for a lowish crossover point. All that matters is the driver's distortion performance, not the Fs.

We can even use a tweeter with 1.4 kHz Fs at 2.0 kHz LR4. A good example is Vifa DQ25SC used in Zaph's ZMV5:

http://www.zaphaudio.com/ZMV5.html

[Cousin Billy]

Hello Jay

Would this refer to Linkwitz-Riley 4th order x-over?.

[Jay_WJ]

Yes, Linkwitz-Riley acoustic (not electrical) 4th order.

[Pano]

Originally posted by Jay_WJ
......acoustic (not electrical) .......

And that's the important thing to understand when building crossovers. It's the acoustic result that counts. You use whatever electrical means you need to get there.