I'm probably a bit late responding to this, but hope it can still help.
To simulate an actual aperiodic box in WinISD, use a sealed enclosure and set leakage to Ql = 3 or so. I've found it to be a reasonable value and easily attainable by tweaking a DIY resistive vent. I've done it via impedance measurements. Here's how I did it many years back.
aperiodic vent
It won't have the extension such as you posted above, but should sound more 'hi-fi'. OTOH, if building to your above simulations, some stuffing material in a tubular reflex port could help tame any perceived booming.
That little 6x6 JBL waveguide is pretty nice. I ran a pair with BMS 4540ND. IIRC, 3kHz was about as low as it got before losing pattern control.
Glad to see you're still running the TD15M - so am I, since 2012, heck of a midbass!
To simulate an actual aperiodic box in WinISD, use a sealed enclosure and set leakage to Ql = 3 or so. I've found it to be a reasonable value and easily attainable by tweaking a DIY resistive vent. I've done it via impedance measurements. Here's how I did it many years back.
aperiodic vent
It won't have the extension such as you posted above, but should sound more 'hi-fi'. OTOH, if building to your above simulations, some stuffing material in a tubular reflex port could help tame any perceived booming.
That little 6x6 JBL waveguide is pretty nice. I ran a pair with BMS 4540ND. IIRC, 3kHz was about as low as it got before losing pattern control.
Glad to see you're still running the TD15M - so am I, since 2012, heck of a midbass!
