REAR PANEL
(LEFT to RIGHT, top and bottom row)
GROUND
Banana Plug connection to CHASSIS Ground and/or CIRCUIT Ground is provided. Need for
connection is unlikely, but can be useful in eliminating or finding source of hum, should hum
exist.
POWER SUPPLY INLET
For connect to either of the REQUISITE OUTBOARD POWER SUPPLIES, models OPS-2 (Solid-
State Supply) or RTS-4 (All Tube Supply). When not connected to a power supply, be sure to
use the screw on cover. The cover will protect the pins from accidental damage. Also, avoid
contact with the pins, as power supply caps can store voltage and possibly discharge when
touched.
AUDIO OUTPUTS
Transformer balanced outputs. Channel-1 top, Channel-2 bottom.
Pin-1 no connection, Pin 2 positive going phase, Pin-3 negative going phase.
LIMITER LINK
Top for Channel-1, Bottom for Channel-2. Both become linked to each other when PK REDUC-
TION mode switch is set to LINK.
TUBE CHANNEL
Protective housing for tubes and opto attenuator. When installing your L2M, be sure sufficient
air space is provided to prevent excessive heat build-up from the tubes.
TUBE PLACEMENT and FUNCTION (left to right)
• 6AQ5A or 6005 (2ea) - Supplies voltage to the Electro-Luminescent Panel (T4C) Ch-1 & Ch-2
• 12AX7 (2ea) - Control Voltage Amplifier (Limiter)
• T4C (2ea) - Optolux Electro-Optical Attenuator
• 12BH7A or 12AU7 (2ea) - AUDIO Cathode Follower for M/S circuit
• 12BH7A or 12AU7 (2ea) - AUDIO Cathode Follower/output driver
• 12AX7 (2ea) - AUDIO Input gain stage
AUDIO INPUTS
Transformer balanced inputs. Channel-1 top, Channel-2 bottom.
Pin-1 no connection, Pin 2 positive going phase, Pin-3 negative going phase.
T H E L 2 M M K I I I M / S V E R S I O N
R e q u i s i t e A u d i o E n g i n e e r i n g
L 2 M M k I I I
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