1st order crossover

[lduarte1973]

hi , can i get away with 1st order crossover for this drivers ?

GF200 - Visaton 20 cm (8 inch) High-End woofer with double voice-coil - Europe Audio

10F/8424G00 - Scan-Speak 4 inch wideband coated fiberglass - Europe Audio

D2608/913000 - Scan-Speak 1 inch dome tweeter fabric diaphragm - Europe Audio

[whgeiger]

Originally Posted by lduarte1973

hi , can i get away with 1st order crossover for this drivers ?

[10F/8424G00 - Scan-Speak 4 inch wideband coated fiberglass - Europe Audio

D2608/913000 - Scan-Speak 1 inch dome tweeter fabric diaphragm - Europe Audio

Not for the low pass filter sections. Driver displacement will still be increasing in the LF stop bands. And, when the driver no longer responds to the signal, it goes to more heat. Of course if you don't crank the volume, you can get away with it.

Regards,

WHG

[jerome69]

LR2 acoustical possible and better, near second order electrical.
A good set of speaker

Originally Posted by lduarte1973

hi , can i get away with 1st order crossover for this drivers ?

GF200 - Visaton 20 cm (8 inch) High-End woofer with double voice-coil - Europe Audio

10F/8424G00 - Scan-Speak 4 inch wideband coated fiberglass - Europe Audio

D2608/913000 - Scan-Speak 1 inch dome tweeter fabric diaphragm - Europe Audio

[crazyhub]

I guess you speak about 1st order electrical; yes it could be possible with this set of drivers but I wouldn't go lower than 500Hz and 3.5kHz.

[bbggg]

The Visaton has a breakup at 900 Hz (a bump in the impedance graph and a wiggle in the FR graph). You cannot hide this with a 6 dB/oct slope even if you cross as low as 200 Hz. It might not be sufficient to hide the severe breakup area above 2 kHz either. BTW you will not achieve a 6 dB/oct low pass filter with a textbook value coil. You may need twice or three times the series inductance.

[whgeiger]

Originally Posted by whgeiger

Not 6 dB/oct for the high pass filter sections. Driver displacement will still be increasing in the LF stop bands. And, when the driver no longer responds to the signal, it goes to more heat. Of course if you don't crank the volume, you can get away with it.

Regards,

WHG

[jerome69]

Your question is very fuzzy, the responses are too !
Everybody can put drivers in a box and with textbook calculate a 6dB crossover. You will have a sound.
Read Troëls article :
crossovers

Your question should be : How could I make a good sounding speaker with the most simple crossover ?
The response is to have measurements and make the crossovers.
To make a proper crossover you must have the drivers in a box, the geometry has an influence on the response. And you do the crossover from this response.
I think this project can gives you an idea of a well designed and similar speaker which can play well. 3-Way Classic
As you can see transition Woofer-Mid 12dB acoustic and Mid-Tweeter 24dB acoustic.

It will be a pity to own so good drivers and have a bad sound.

You can design without actual measurements :
Introduction to designing crossovers without measurement

[AllenB]

Creating a first order crossover typically takes between zero and four components per filter section. Using a single component per section might be called a 'minimalist' crossover. The following suggestions assume careful baffling and positioning.

For a normal crossover using the visaton, I would prefer to cross at around 1kHz although it could probably be pushed a little higher. First order would want notch filtering for the breakup if you go higher than maybe 250Hz. A minimalist crossover would be battling against the voice coil inductance and would be borderline at best.

When crossing the Scan-Speak 10F to the tweeter using a normal crossover, I'd choose to cross at around 2,500Hz. Although this driver could respond to something minimalistic here if running fullrange, when you cross it to a dome tweeter it would be best, in my opinion, to keep it below 4,000 for a full crossover, or 2,500Hz for first order. You might get away with a minimalist crossover at 2,500Hz if you choose the inductor to start a little lower, possibly 2kHz.

To high pass it, you might get away with a proper first order (either passive or active) above maybe 200Hz, although you could take it lower. Minimalist may require up to a couple more octaves.

The tweeter might respond to a minimalist crossover at, say 2,500Hz, but the power handling would be quite low.