AC Inlet
The AC voltage selector and fuses are integrated into the IEC AC inlet socket. Looking at the “window”
one can read the voltage setting.
This pre-amplifier may be set to either a 230V or 115V “design centre”.
Please ensure that the pre-amplifier is set correctly before connecting to your AC power source.
The 230V design centrer will work over a range of 200 to 255V while the 115V design centre will work
over a range of 100 to 128V.
Fuses
A pair of five by twenty mm, 250V fuses are installed into the fuse drawer. The fuses may be replaced
by disconnecting the unit from the mains and then opening the drawer with a suitable tool. Use 1A
fuses for 230V and 2A fuses for 115V.
Ground terminal and switch
To aid system fine tuning, a chunky ground terminal is provided.
This terminal connects internally to the K-15’s audio signal zero volt reference.
When the ground switch is placed into the “lift” position, the signal zero voltage reference is somewhat
“decoupled” from the chassis ground path. Setting the switch onto “lift” may assist in ridding some
system combinations of “earth loops”.
Front panel description
Ruby power indicator
This indicator becomes illuminated when the power is on.
It takes a few seconds to reach full illumination level.
Power knob.
The power knob is designed to require some “initiative” to turn it. It is a 90 degree rotary switch. To
turn on, rotate 90 degrees clockwise. To switch off, rotate 90 degrees counter clockwise. There is no
“stand-by” mode. The pre-amp is either on or off.
Volume control
This control is designed to be advanced much further than is typical with most pre-amplifiers.
Starting at the 12 O'clock position is a good starting point unless you have high efficiency speakers in
which case the volume may be set to a lower setting.
The markings indicate the actual “throughput” gain with the maximum being +8dB(V).
Input selector
Use this to select the required input 1 thru 5. This is a full mechanical selector of the highest quality.
The “feel” of each control, volume and power is consequently different.
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Takumi K-15 EX Owner's guide
