precision devices pd 1550
i am planing to use this driver 40hz-200hz at bass reflex enclosure.
people say that low qts drivers are meant for horn loading but the
datasheet says it will work for bass reflex too.
i don`t mind using some eq to make it flat.
is there any other flow except that?
i believe the cone control will be awesome because of the very high bl.
is there a reason i shouldn`t use it that i can`t see?
how many litters and tuning would you recommend?
The Qts is too low for good performance in a vented box.
Fs 31 Hz
Xmax 8 mm
Revc 6.4 Ohms
Vd 7x10-4 m3
Pmx 600 Watts
Cms 215 µM/N
Vas 242 Litres
Mms 123.4 grams
Sd 890 sq cm
BL 26.34 T/m
But if you want to try it, build a 140L box and tune it to 40hz.
well, PD1550 is cheap right now because of new model
with EQ its probably a fantastic woofer
but that takes power
the new model does have higher Qts
but hifi, I guess the 18" PD186 could be a better choice, and still affordable
and btw, I think EQ is best done with closed designs
its more difficult to 'predict' the actual sound :D
If you haven't bought drivers yet, I can recommend the neo-15 from PD: The PDN-15BR40. Very nice soundig driver for BR.
Fs 35.678 Hz
L1 0.820 mH
L2 1.851 mH
Res 79.625 Ohms
RMSE-load 1.945 Ohms
RMSE-free 0.430 Ohms
Vas 224.800 Litres
Mms 90.949 grams
Sd 855.35 Sq Cm
Cms 218.797 µM/N
R2 5.017 Ohms
Xmax 10.5 mm
Re 5.106 Ohms
The PD-186 is also a good (and bigger) driver for BR.
pd 186 looks very good.
i couldn`t find price for pdn15br40
I reckon all the PD neo woofers are more less obsolete by now
the PD 186 may have been obsolete as well
could be there have been a 'demand' for it
among the PD woofers, the PD186 has pretty good Xmax
probably why its at the lower end of the SPL efficiency scale
which btw often gives better low end efficiency
strange upsidedown logic ;)
A variable output impedance amplifier would enable you to increase Qes (and thus Qts) to be more usable.
Download winISD Pro and play with the Added Series Resistance to get it right.
it seems that pd1550 is doing well at 110L 40hz.
it needs only 3db boost 40-70hz (40hz is fine for me) and with the room placement
maybe no eq at all and can give 118db at 1m.
i think i will give it a try because pd 186 results to very big box.
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