two 2213H for subwoofer?

[MatthiasA]

Hello!

my question - are two 2213H drivers from A 4312 Studio Monitors
suitable for a vented subwoofer?
how much liters would you prefer?
has anybody Thiel Small Parameters for calculation?

Greetings Matthias

[remusr]

Dual 2213H's should be great - sens is lower than a 15" by 3-5dB but they take alot of power, >200w on my system, and may be a bit faster than a 15. Impedance is a bit low, in the 6 ohm range so watch that if parallel them. Here are the Thiele-Small, you should be able to find the whole list in Tech Lib or search for it:

fs=25 cps
Qts=0.49
Qms=8.5
Qes=0.52
VAS=8.3 cf or 235 L
Eff=0.68 %
PE=75 watts
Xm=0.31" or 0.62" P-P
Dia=9.8 in
Sd=75.4 in2
Vd=23.3 in3
Re=4.4 ohm
Le=0.6 mH
BI=8.9 T-m
Mms=85 g
FluxDens=1.0 T

[GordonW]

2213H has same parameters as the 123A, to all significant degrees. Check out this thread for a design I came up for isobaric loaded 123As... you could always just cut the volume in half and the port area in half (keeping the same port length), and use only two drivers in a single clam-shell pair:

http://audioheritage.org/vbulletin/s...=123A+bandpass

If you wanted to run a standard vented enclosure for a subwoofer, I'd recommend at least 4 cubic feet PER 123A/2213H. Tune the box to somewhere in the low-20Hz range (ie, around 23-25 Hz or so)...

Regards,
Gordon.

[MatthiasA]

hello - thanks a lot for this information

i calculated with bass box pro
do you thinks its ok ?

greetings matthias



here with crossover ...
but why is the curve over 2khz?
what part values would you take?

[MatthiasA]

how much liters has the orginal 4312 monitor?
do anybody know the dimension of porttube?

greetings matthias

[Robh3606]

Hello Matthias

You have quite a peak there at 60hz. Don't know what your room dimensions are but many rooms have modes in the 50-70Hz region and dropping a sub in with a peak there????? Don't you have the ME120?? drivers???. What do you need bass fill below 50Hz or so?? Problem with that driver is for you to get extended bass out of it with a smooth peak free curve you need very large cabinets. There are better choices if you need smaller boxes. Watch the Xmax on the larger more extended tunings.

Rob