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w
,
!
NORMAL INPUTS
l
..
::,
IL
..
::,
0
BAL IN-1
a:
J201
w
N~
::::i ••
c(
::,
Cl
IU BAL IN-2
li:
J202
~~
...
.
BAL IN-3
J203
»-
BAL IN-4
J204
-'
~
UNBAL
IN/OUT-1
UNBAL
IN/OUT-2
UNBAL
IN/OUT-3
UNBAL
IN/OUT-4
11 I I
4
INPUT MODULE JACK (J506)
,---7
(D
LEVEL-I
ALTEC-2221
~PUT
CA~
SPECIAL
INPUT/OUTPUT
,--
1
I
'-
J214
--
J215
J216
1h
,
LEFT DRIVER MODULE JACK (J505)
i-----
~-----rl~
I
I
3(~
__
__,.(I~
I •
~~
7
lTOB
MODEL 2275
POWER
AMPLIFIERS
-~
75WATT/16OR BOHM
OUTPUTS
I
6,~
J414
.._
I
I
I
I
I --) )
111 I I
I
<(-16
>-7)!-o
....
I
7,~
I
J415
.._
~
HF
I
~
I
~
t
~
--
>
>
1111 I I
T
«~!
>-7)!---<>,
- ,
·y-j
ii
i
i i i
;~((-1~
>-7)Lo
·~~
~
I
L
MF
I
LF
N/C
ALT!:C-2251
I
10
J,,s
Bl-AMP/TRI-AM~
11
DRIVER CARD
-
------
12
'11
110
Ys
RIGHT DRIVER MODULE JACK (J504)
,------
7
S203
S103
S101
S201
S202
(- t
T
8
..........
y
...,..t
21)1) ....
21 ____
.....
L
N/C
N/C
N/C
N/C
I
I
12
J 11
I
10
I
9
ALTEC-22~~
I
_ -.j;_
,J;_
-.j;_ ..J_.;
2-CHANNEL
DRIVER CAR~
12
11
10
9
Figure 20. Biampllfied Configuration with Far, Middle, and Near-Throw Horns
....
-=-
One balanced input for a bi-
amplified system having far,
middle and near-throw horns.
Crossover frequency is 800 Hz.
One HF channel feeds one
power
amplifier
module
to
drive far-throw
horn
(203B).
Two additional
HF channels
each feed one power amplifier
module to drive middle-throw
(803B) and near-throw (1003B)
horns. LF channel feeds one
pair of parallel power amplifier
modules.
Note
that
mid·
frequency driver amplifier cir-
cuit is available for a HF fre-
quency range application
by
patching J213 and J214.
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