4- vs. 8-Ohm woofers for this design

[presscot]

I’m planning for a new project of 2.5 ways triple woofers floor-standing loudspeakers. I wonder whether I should use 4 or 8 Ohms driver for mid & woofers.

There’re two options I could figure out:

I) Using 8 Ohms drivers
Speaker A will be 8 Ohms
Speaker B will be 4 Ohms, formed by two 8 Ohms connected together in parallel

II) Using 4 Ohms drivers
Speaker A will be 4 Ohms
Speaker B will be 8 Ohms, formed by two 4 Ohms connected together in series

 

[jayme]

How about

III)
Speaker A at 8 ohms
Speaker B is two 4 ohm speakers in series for 8 ohms nominal

 

[eriksquires]

Try simulating with Xsim or virtuix

 

[presscot]

How about

III)
Speaker A at 8 ohms
Speaker B is two 4 ohm speakers in series for 8 ohms nominal

Sorry, I’d prefer them to be identical for all drivers.

 

[Moondog55]

Alternatively you parallel 2 * 4R drivers and cascade them to the third 4R driver though a large inductor. Size the large inductor around the baffle step frequency and a nice easy 6R load for the amplifier. Keep the DCR of the inductor as low as you can