150 4500Hz
51dB
68dB
14dBEIA
500
85g 3oz
0dB=1mv/10µ bar
0dB=1V/µ bar
PRA 448S
PS-448/448S
PRA 448 PRA 448S
PRA 448S
PRA 448 PRA 448S
+
+
PRA-448 PRA-448S
N.C.
N.O.
C
PRA-448/448S
dB
10
-10
-20
20 50 100 200 500 1000 2000 5000 10000 20000 Hz
0
2
90mm
http superlux tw
-
1
