I cant choose between the two variants of the ND-90 for my boombox project.
I like the response of the 8ohm one much better than the 4 ohm one ( both are in a 4 liter box with a port tuned at 63hz). I know that this is just another sprite build, but given the fact that i am going to power them with a battery pack(21v 5s 70wh) -therefore i need that efficiency- I am concerned about the battery drain in conjunction with the baffle step circuit the sensitivity of both the drivers in going to drop really low (bsc for 4ohm is a 6ohm resistor parallel with 0.4mh inductor and a 8.2 mF cap, not sure why he uses a cap in a bsc/ 8ohm a 20ohm resistor with a 0.9mh inductor). The efficiency of the drivers drops a lot especially when placed in a box.
Which one would you choose for the bass the volume and the battery endurance?
p.s i am guessign the max wattage i would drive them would be like 5watts maybe 10 if i want to annoy everyone around.
I like the response of the 8ohm one much better than the 4 ohm one ( both are in a 4 liter box with a port tuned at 63hz). I know that this is just another sprite build, but given the fact that i am going to power them with a battery pack(21v 5s 70wh) -therefore i need that efficiency- I am concerned about the battery drain in conjunction with the baffle step circuit the sensitivity of both the drivers in going to drop really low (bsc for 4ohm is a 6ohm resistor parallel with 0.4mh inductor and a 8.2 mF cap, not sure why he uses a cap in a bsc/ 8ohm a 20ohm resistor with a 0.9mh inductor). The efficiency of the drivers drops a lot especially when placed in a box.
Which one would you choose for the bass the volume and the battery endurance?
p.s i am guessign the max wattage i would drive them would be like 5watts maybe 10 if i want to annoy everyone around.