Introduction
Thank you very much for purchasing the Fostex PH-100 headphone amplifier/distribu-
tor. The PH-100 can distribute the input signal accepted by any of three pairs of stereo
input connectors to 10 headphones whose level can be adjusted independently. It also
provides the 10-input, 10-output matrix box function which allows independent feed
for each headphone. The PH-100 is equipped with two stereo pairs of balanced inputs
(+4 dBu XLR-3-31 connectors and -10 dBV phone jacks), as well as a stereo pair of
unbalanced inputs ( -10 dBV RCA pin jacks). It also provides the AUX IN jacks which are
useful when using the PH-100 as a cue box.
In addition, you can cascade PH-100s, making more than 10 persons possible to monitor
the same stereo source.
Please read through this manual before using, and always keep it nearby.
Owner’s Manual
Model
PH-100
Headphone Amplifier / Distributor
<Contents>
Safety Instructions ....................................................................................................................2
Notes on Operation ...................................................................................................................3
Names and Functions
Front panel section ..............................................................................................................3
Rear panel section ............................................................................................................ ...4
Application Examples
Example - 1: Using the PH-100 as a cue box ...................................................................5
Example - 2: Using an individual talkback monitor facility .......................................5
Example - 3: Cascading PH-100 .......................................................................................6
Main Specification .....................................................................................................................7
Block diagram .......................................................................................................................7
3 7 2 2 2 8
10
0
HEADPHONE AMP DISTRIBUTOR
POWER
10
0
PH-100
5
5
AUX IN
INPUT
MONO
ST
10
0
5
10
0
5
10
0
5
10
0
5
10
0
5
10
0
5
10
0
5
10
0
5
10
0
5
10
0
5
PEAK
10
9
8
7
6
5
4
3
2
1
PHONES
CAL
