6
- Compact disc, DAT, MP3, DVD Audio... It is recommended to plug them to a stereo LINE input
(14), which have RCA connectors. All these inputs can hold line signals with a level of 0dBV (1V).
- Turntables CAN NOT be directly connected to this unit, because none of the SAM312's inputs has
a RIAA preamplifier.
- MIX connection to other mixing units (15): Your SAM312 allows direct access to the main mixing
"bus". This input is specially useful to interconnect two SAM312 units, or to plug another mixer, thus
increasing the maximum effective number of inputs and mixable channels. Input sensitivity is selectable by
internal jumper between 0dBV (factory adjustment) and –10dBV. See configuration diagram.
5. OUTPUTS
- The SAM312 provides with two main outputs OUT L/R (18, 19) and OUT (21), The type of
connector is the only difference between them: XLR3 connectors for OUT L/R (electronically balanced
output) and RCA for OUT output.
XLR 3 pin assignment to signal corresponds to:
Live or direct signal
>
Pin 2
Cold or inverted signal
>
Pin 3
Ground/Earth
>
Pin
1
The balancing circuit simulates a transformer so, if you want to use OUT L/R in non balanced mode,
you must shorcircuit the pin 3 to pin 1. If you do not do this, the output signal will not have the right level
and quality.
You should be careful when manipulating the OUTPUT VOL (7) of every output of this unit and
avoid having the "clip" indicators from the connected power amplifier lit up permanently; instead, make
them light up ONLY following the low frequencies from time to time, in the worst situation.
- The SAM312 has 2 record outputs which use RCA type connectors. The only difference between
them is that REC 1 (16) is not effected by the tone control / L+R and REC 2 (17) is.
- L+R switch (20): This back panel switch can turn the signal from the REC 2, OUT L/R and OUT
into mono.
- Headphones: For best operation, they must be high impedance ones (200 to 600
Ω
). Plug them to
the headphones output (10), located on the front control panel, by means of a standard stereo 1/4" jack
connector. Center ring is right, tip is left and back ring is ground.
- SAM312 Incorporates a REMOTE MUTE (22) feature that mutes all inputs of the unit when a
remote contact is closed (factory adjustment) or open (internally selectable by jumper). See configuration
diagram. Remote MUTE feature has been designed for the connection with fire detection systems or any
other security system. It affects all inputs channels. Internally configurable NO / NC (Normally open /
Normally closed).
