20
THE AMPLIFIERS
The input signals are fed to special power op-amps which are made to work with
high supply voltages.
To match different headphone characteristics the overall gain may be altered
with the aid of jumpers.
(See page 22/23
“
Jumper Settings
”
for details).
GAIN ADAPTION
For details see page 22/23
“
Jumper Setting
”
The gain setting serves to adapt the amplifier in a perfect way between the
source and the headphones. On one hand it may lower unwanted noise, on the
other hand the travel of the volume control may be optimized.
Around the input circuitry the gain may be set to -6 / 0 / +6 dB.
Ex works the unit is set to +6 dB, which may be sufficient for most applications.
When high sensitivity headphones are used, the jumpers may be set to 0 or
-6 dB gain to reduce gain.
The jumpers near the power op-amps allow a gain of +12 dB instead of 0 dB
which may be senseful for low efficiency headphones.
Because these jumpers will render the feedback gain, they will also cause a
higher noise level!
Ex works the jumpers are set to +6 dB gain!
DISPOSAL
Disposal of Old
E
lectrical &
E
lectronic
E
quipment - WEEE Regulation
(Applicable in the European Union and other European countries with separate collection systems)
This symbol on the product or on its packaging indicates that this product shall not be treated as
household waste. Instead, it shall be handed over to the applicable collection point for the recycling of
electrical and electronic equipment.
By ensuring this product is disposed of correctly, you will help prevent
potential negative consequences for the environment and human health,
which could otherwise be caused by inappropriate waste handling of this
product. The recycling of materials will help to conserve natural resources.
For more detailed information about recycling of this product, please contact
your local Civic Office, your household waste disposal service or the shop
where you purchased the product.
Operation PHONE-AMP G103 Mk II
Содержание PHONE-AMP G103-MK II S
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