Hornresp

[woodo]

Hi
I tried modelling the attached TQWT but the output looks questionable compared to other sims I have seen leading me to think I've entered wrong areas at different parts of the line. Can the good folk spot where I may have gone wrong? Please let me know if this is a question for a different forum of course. I am uncertain of the inductance value of the Triangle T17FL2 driver which may be an issue but the value of .18 mH was on a french catalogue of T/S parameters for the unit. Seems low though.

[Booger weldz]

Woodoo, look at the Vas. Kinda large it seems.

Try a 600-650cm2 CSA Offset driver TL at a 55-65cm Length to driver and 120cm from there to exit?

[woodo]

thanks Booger, will have a look. the Vas of the driver is rated at 40L. it does seem high.

[Greebster]

This may help... DIY Audio Projects Forum • "Hazard" wide band speaker load

[woodo]

Thanks, same guy's speaker. Was interested in how to model the TQWT which I am having trouble getting a sensible output. I see a figure for the inductance though which I wasnt sure about.

[GM]

Originally Posted by woodo

Hi
I tried modelling the attached TQWT but the output looks questionable.....

Greets!

My HR inputs are close to yours except using the base specs and yes, without factoring in driver/vent delay [Chamber/Path] to the listening position [Lp], stuffing impact [Filling] makes for a pretty pathetic looking sim.

That said, this one is barely > Vas, so at minimum a bit small and more so if significant series resistance [Rg] and/or stuffing to smooth it out isn't factored in.

If seated ear height is much different than ~31", consider making the pipe based on yours and use the Wizard to try different net volumes [Vb].

For instance, a T/S max flat alignment is ~100.28 L/44.6 Hz Fb, so ~2.5x larger, tuned slightly lower and depending on the room's acoustics, could be tuned as low as ~0.707x Fs = ~41 Hz.

Some have pushed drivers [much] lower, but power response 'drops like a stone' [excursion increases 4x/octave], so 'caveat emptor' applies big time with a tiny Xmax driver.

GM

[woodo]

@GM and others. Thanks for your analysis. Will play further based on your recommendations.

[GM]

Originally Posted by woodo

I see a figure for the inductance though which I wasnt sure about.

I used 1.0, but this spec will probably be less, so has little impact on its HF response.

GM

[GM]

~T/S max flat sim based on my ~39" ear height.........

GM

[olsond3]

Where is the official download site for hornresp?