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Model PH-100
Names and Functions
Front Panel section
1. [PHONES] level controls [1 through 10]
Each control adjusts the output level of the
corresponding [PHONES] jack (1 through 10) on the
front or rear panel.
7. [PHONES] jacks (1 through 10)
Connect headphones. There are also headphone
jacks on the rear panel so you can use whichever
you like.
6. [INPUT (ST, MONO)] select switch
Selects whether monitoring a signal from the
[INPUT] jacks (balanced or unbalanced) in stereo or
mono.
5. [INPUT] level control
Controls the input level of the [INPUT] jacks
(balanced or unbalanced) on the rear panel.
4. [POWER] switch/indicator
The switch turns on or off the power. The indicator
lights up when the power is on.
When turn on or off the power, set the level
controls of the PH-100 and connected device(s) to
the minimum positions.
3. [AUX IN] level control
Adjusts the input level of a stereo signal from the
[AUX IN] jacks on the rear panel. The signal adjusted
by this control is mixed with the stereo signal from
the [INPUT] jacks which is level-controlled by the
[INPUT] level control, and fed to both the [PHONES]
and [CASCADE OUT] jacks.
2. [PEAK] indicator
Represents overload of the input signal.
If the indicator frequently lights up, turn down the
[INPUT] and / or [AUX IN] level controls so that the
indicator does not light up.
<Note>
Each headphone jack on the front panel take pri-
ority to the corresponding (same number's) head-
phone jack on the rear panel.
You cannot use both front and rear jacks with the
same number simultaneously. If you connect head-
phones to both front and rear jacks with the same
number, you can only use the headphones con-
nected to the front jack.
Notes on Operation
• Do not use headphones for long hours at high sound levels.
If the headphones is used under such condition, it could
injure your hearing. Also, be careful not to rapidly raise
the output control when using the headphone. Please use
good sense to protect your hearing.
• Switch off power when connecting external equipment to PH-
100.
Always switch off power to the PH-100 when connecting
external equipment to it.
• Retard the sound volume control when the headphone plug
is connected or disconnected from the jack.
Always turn down the sound volume control before the
headphone is plugged or unplugged while the volume
control is set too high, it could create noise and have hurt
your ears.
• Turn down all sound volume controls before switch on power.
Be sure to fully turn off all sound volume controls when
switching on/off power to the PH-100.
3
The input signal is fed to the [PHONES]
and [CASCADE OUT] jacks in stereo.
The input signal is fed to the [PHONES]
and [CASCADE OUT] jacks in mono (L+R).
ST
MONO
10
0
10
0
5
5
AUX IN
INPUT
MONO
ST
PEAK
CAL
<Note>
At the CAL position,
you can get the nomi-
nal input level (+4 dBu
or -10 dBV). CAL po-
sition shows the
nominal position."
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
109
8
7
6
5
4
3
2
1
PHONES
CAL
1
2
3
4
5
67