Can you use 2x 4th order BP boxes to imitate a 6th order BP ?

[SpeakerBob]

Box measured in vehicle with an 125Hz highpass (Couldn't measure without a highpass unless I ripped out lots of wires and swapped about a lot )

 

[SpeakerBob]

80Hz highpass on amp combined with 125Hz lowpass on headunit.

 

[Brian Steele]

Knocked up a quick test box.

How did you do that measurement? Is that a close-miked measurement?

 

[SpeakerBob]

Here's a measurement of my mains without any highpass for Sreten.

Although they measure down to 40Hz trust me that they will not play at proper volumes at 40Hz.

 

[SpeakerBob]

How did you do that measurement? Is that a close-miked measurement?

1m groundplane

 

[SpeakerBob]

Mains and sub, 80Hz high pass and 80Hz lowpass on sub.

80Hz highpass on mains.

I'm pretty pleased with this project so will be building a pair of boxes for the car, and putting some time into tuning it all up properly.

 

[SpeakerBob]

more detailed plot of bottom end.