18 Sound 8NMB420 tapped horn

[GM]

Originally Posted by SOSx

Are there any mistakes In the design?

Don't know if it's a mistake per se, just normally the expansion of a simple pipe horn expands along its entire length, so would be something like this:

GM

Edit, just noticed the added inductance which you don't need. BTW, if you add inductance you should add its Dcr in the Rg field.

[TundraLTD]

Originally Posted by littlemike

Series inductors do work to flatten a response, I have measured a tapped horn with and without. The added series impedance "puts the brakes" on the resonant peaks in a tapped horn.

What type of signal are you using to test? (pink noise, sine sweep, etc.)

Are you using any active HP or LP filters during your tests?

[hm]

Hello,
may be your plot was the point,

you saw all my double horns with measurement,
and you saw they are all the "same", so my study
is simulated the same, so it will work.

How much watt makes a normal amp 50- 5kwatt (log volume control)
when you open it at 12 o´clock? --- it is only 10 W peak!
As i said in the disco i worked 89-92 all amps never open over 11 o´clock (5Wpeak)

For pro audio check out my PA studies, simply the same as my other double horns.

[littlemike]

Originally Posted by TundraLTD

What type of signal are you using to test? (pink noise, sine sweep, etc.)

Are you using any active HP or LP filters during your tests?

Swept sine signals with Room EQ Wizard or HolmImpulse

No filters, the electronics measure flat through the data I've presented.

Measured outdoors in a quasi-2PI environment - it was raining on and off that night, can't remember how we had this particular sub set up. No change in gain between sweeps, set at 2.00 volts into a 4-ohm resistance. The only thing I did between the sweeps was insert the inductor in series with the positive speaker lead.