Mounting Diagram
Wiring Diagram
Recommended Connections
The 209 is a nominal 8-ohm impedance loudspeaker with a
10-watt input capability. However, it is also available with
transformer, the 209-4T, and with transformer and grille, the
209-4TWB.
The 209-4T utilizes a 4-watt, 25/70.7/100-volt universal line
matching transformer with power taps ranging from 0.5 to 4
watts as indicated in the table below. The transformer is
mounted to the frame and the primary winding is accessible
for the user to select any of the power taps indicated in the
table below.
All wattages marked for the various taps refer to the load on
the amplifier, with the insertion loss of the transformer being
less than 2 dB.
Recommended Enclosures and Baffles
209-8A and 209-4T are designed to fit on standard 8-inch
ceiling speaker baffles. Additionally, the 209 series
loudspeakers will accommodate the use of any standard back
enclosure with a diameter of 8.6 inches or greater and a depth
of at least 3.5 inches.
Larger back volumes will increase the lowfrequency output.
The frequency response of a 209 in a typical 0.25-cubic-foot
and 1.8-cubic-foot back enclosure are shownon page 4.
Mounting
The 209 may be front- or rear-mounted against either surface
of its mounting flange and requires a 18.4 cm (7.25 in.)
diameter cutout and a 19.5 cm (7.68 in.) bolt circle. Normal
fasteners up to 5 mm (0.20 in.) will fit through the eight holes
in the frame. The 209 is designed for mounting on standard
ceiling speaker baffles.
T
4
-
9
0
2
V
5
2
V
0
7
V
0
0
1
W
0
.
4
n
w
o
r
B
w
o
ll
e
Y
n
e
e
r
G
W
0
.
2
d
e
R
n
e
e
r
G
e
u
l
B
W
0
.
1
e
g
n
a
r
O
e
u
l
B
t
e
l
o
i
V
W
5
0
.
w
o
ll
e
Y
t
e
l
o
i
V
A
/
N
n
o
m
m
o
C
k
c
a
l
B
k
c
a
l
B
k
c
a
l
B
s
m
h
O
8
e
t
i
h
W
e
t
i
h
W
e
t
i
h
W
n
o
m
m
o
C
k
c
a
l
B
k
c
a
l
B
k
c
a
l
B
Dimensions
Polar Response in 1.8 ft
3
Sealed box 4 volt RMS of 1/3 octave
Band Limited Noise in Anechoic Environment, 20 feet on Axis.
