What ported design would you use for this driver? JL 13tw5-3

[NSTALN 10+ year member]

I'm curious what you folks would design for a ported alignment...JL doesn't suggest one. I was thinking 1.5cf tuned around 28hz-30hz.

13TW5-3

Free Air Resonance (Fs): 27.52 Hz

Mechanical "Q" (Qms): 11.230

Electrical "Q" (Qes): 0.511

Total Speaker "Q" (Qts): 0.489

Equivalent Compliance (Vas): 59.47 litres

One-way, Linear Excursion (Xmax): 9.7 mm

Efficiency (1W/1m)**: 85.87 dB SPL

Effective Piston Area (Sd): 98.256 in2

Nominal Impedance: 3 ohm

Power Handling (continuous): 600W


Thanks!

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[n2audio 5,000+ posts]

The ideal ported box for a sealed box sub is always giant and tuned really low. (Ideal model: ~4cf 20fb)
Looking at it in WinISD -- Tuning lower than 35 doesn't gain you much with a box that small. It gives you slightly more output at 30 and lower (rolloff is already steep, so it's low either way), but noticeably less output at 45-50. Plus, the size of the port will become an issue if you're trying to keep the box small.

 

[NSTALN 10+ year member]

The ideal ported box for a sealed box sub is always giant and tuned really low. (Ideal model: ~4cf 20fb)
Looking at it in WinISD -- Tuning lower than 35 doesn't gain you much with a box that small. It gives you slightly more output at 30 and lower (rolloff is already steep, so it's low either way), but noticeably less output at 45-50. Plus, the size of the port will become an issue if you're trying to keep the box small.

Thank you for your input.

 

[THATpurpleKUSH 5,000+ posts]

I'd go more like 2-2.25cf for a little more output.

Keep tuning above fs or it will be excursion limited and power handling will be sacrificed.