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Notes On Operation
1. Do not use headphones for long hours at high sound levels.
If the headphone 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.
3. 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 to the PHONES jack. If it is plugged or unplugged while the volume control is set too high, it could create noise and have hurt your ears.
2. 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-50.
4. Switch off power when connecting external equipment to PH-50.
Always switch off power to the PH-50 when connecting external equipment to it.
Names and Functions of the Controls and Jacks
Front Panel
5 5 5 5 5
2
5
3
PH-50
HEADPHONE AMP DISTRIBUTOR
1
0 10 0 10 0 10 0 10 0 10 0 10
PEAK
5 CAL
POWER
1
2
3
4
5
AUX IN
4
ST MONO PHONES
0
10
INPUT
7
1. Headphone output level control knob [PHONES 1 ~ 5]
For adjusting sound volume of the headphone plugged into PHONES jack 1 ~ 5.
6
5
5. Input master level control knob [INPUT]
Adjusts the input signal level of equipment connected to the rear panel balanced input connectors (XLR or PHONE) or the unbalanced input jacks. Standard input level is obtained when the knob is set to CAL.
2. AUX input level control knob [AUX IN]
This adjusts the input level of the external equipment connected to the rear panel AUX IN jacks. The signal, whose level is adjusted by this knob, is mixed with the signal whose level is adjusted by the INPUT knob and thus output from both the PHONES jack and CASCADE OUT jack.
6. Input image position selector switch [ST/MONO]
Image position, of input signals from equipment connected to the rear panel balanced input connectors (XLR or PHONE) or the unbalanced input jacks (RCA), is selected by this switch. If switched to ST, the input signal will be output from the PHONES output jack or the CASCADE OUT jack, in stereo if switched to ST, or in monaural if switched to MONO.
3. Peak LED [PEAK]
This will light when input is overloaded. Should this light frequently, turn down the INPUT knob.
7. Headphone jacks [PHONES 1 ~ 5]
Headphones are plugged in here. Sound volume for each are adjusted by the headphone output level control knob located above each jack.
4. Power switch [POWER]
This switches on/off power to this equipment (LED will light at ON). When switching on/off power to this equipment, turn down the level control knobs on this and also on the external equipment.
Rear Panel
1 2 CHANNEL IN 3
(-10dBV)
INPUT 5 L
(+4dBu/-10dBV)
4
R
8
XLR PHONE 2 T HOT 3 R COLD 1 S GND
9
L
R
L (-10dBV) R CASCADE OUT
L
(-10dBV)
R
INPUT
L/MONO AUX IN
R
(-10dBV)
+4dBu
-10dBV
13
12
11
10
11. AUX input jack [AUX IN] (RCA: -10dBV)
This is a spare input jack. For an external equipment of monaural output, it must be connected to L/MONO (the same signal will also be applied to R). Signals input here are adjusted in level by the AUX IN knob.
8. Channel input jacks [CHANNEL IN 1 ~ 5] (RCA: -10dBV)
These jacks are used to directly assign external signals (monaural) to each headphone output. Signal input to these jacks will not be affected by the INPUT knob.
9. Balanced input connector [INPUT] (XLR, PHONE: -10dBV/+4dBu)
The balanced line is connected here. Two types of connectors XLR-3-31 and PHONE - are provided. Input level is adjusted with the INPUT knob and the +4dBu/-10dBV switch is set to match the output level of the equipment connected here.
12. Unbalanced input jack [INPUT] (RCA: -10dBV)
Unbalanced outputs are connected here. In the same way as for balanced inputs, the input level is adjusted with the INPUT knob. When making a cascade connection, this is connected to CASCADE OUT of the other PH50.
10. Balanced input level selector switch [+4dBu/-10dBV]
When using the balanced input, this is switched to match the output level of the equipment that is connected. The input level can be selected for -10dBV or +4dBu.
13. Cascade output jack [CASCADE OUT] (RCA: -10dBV)
When using PH-50 in the cascade connection, this jack is connected to the unbalanced input jack of the next PH-50. This output can also be used for recording by applying it to the INPUT of a recorder.
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