Series resistor for horn driver
I'm using TD-2002 drivers in DIY speakers using an active crossover. They were connected directly to the horn amp, but I noticed that the horn seemed to "stick out" a little at times, especially when reproducing female vocals. I tried a small series resistor from the amp to the horn drivers, and with about 2.7 ohms that fixed the problem. I'm happy that the solution was so easy and inexpensive, but I would like to understand the theory. My guess is that I'm "tuning" the decay time (waterfall) of the horn drivers to better match the woofers in the crossover region.
What is the motivation or reasoning for this formula?
Quote:
Originally Posted by
Earl K
A (very) primitive formula that I use to index transducers ( according to their "dynamics potential" ) is ;
DPI = ( BL2 / Re ) / ( Sd / Mms ) x .5
where;
Sd is in sq inches
Mms is in grams
.5 is simply an arbitrary constant added into the formula to keep the derived numbers under 100
( for example ; a 2235H is @ 32 while a 2226 sits around 51 and a 2220H comes in at @ 88 )
What is the motivation or reasoning for this formula?
curious
Ruediger