Pass INT-60, Owner'S Manual

Page: 5 / 10

5
Output Connection
You can hook this amplifi er up to any normal loudspeaker without danger of damage.
Note, however that both the (+) Red output connection and the (-) Black output
connection are live There is no ground reference at the speaker terminals. The black
(-) speaker terminal must never be treated as ground.
This can be important when you are hooking up active sub-woofers to the output of
the amp – if you need a signal ground connection then use the white ground terminal
provided on the rear panel.
The white signal ground connection is not a safety ground. Safety ground is provided
only by the detachable power cord. Never defeat the safety purpose of the power
cord.
Operation:
In use the INT-60’s front panel controls and alphanumeric display are quite straight
forward, and intuitive. We encourage you to become familiar with their operation
prior to establishing any input connections with this unit.
After the all the inputs and outputs are connected and double checked, you can
now turn on the preamp by means of the power switch located next to the AC inlet.
The left most button on the front panel is Standby. Pressing this button toggles
between Standby and On.
The four Input Select switches select the active input, 1 through 4 directly.
The right most button on the front panel is Mute. Pressing this button toggles between
mute on and mute off. Mute on removes signal from the output of the preamp.
The electronic volume control allows 63 dB range and is driven by a micro-controller
that reads the optical encoder serving as a front panel volume control. In this manner
tracking of the volume of the two balanced channels is possible with accuracy
unavailable on any ordinary volume control, assuring precise level steps and high
common mode rejection in balanced circuits.
Note: The way the volume control is designed, you may need to be at step 20 or 30
before you can hear anything.
Don’t be afraid to turn the volume up to 40 or 50 etc. The volume control is an
attenuator so the higher up you use it the more of the original signal is used.
Wayne Colburn’s exceptional volume control in conjunction with the fl uorescent
display gives the user ability to replicate volume levels with absolute accuracy in steps
of 1 dB.
We recommend the use of the balanced output mode where possible. Balanced
input to power-amplifi ers will typically retain the character of the input mode,
but offers less distortion, less noise, more gain, and more voltage swing, without
compromising the sound.