OT

SERIAL NUMBER

MANUFACTURING DATE

 

 

 

 

 

 

 

 

R.

 

 

 

MONO PLUG

 

 

 

MONO PLUG

 

 

STEREO

 

RSONNEL.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PLUG

 

 

 

 

 

 

 

 

 

 

 

 

 

ME TYPE.

 

 

 

INSERT ONLY INTO THE

 

INSERT ALL THE WAY IN TO

 

 

 

 

 

 

 

TIP OUT TO EFFECTS DEVICE

USIBLE

 

 

 

"FIRST CLICK"

 

THE "SECOND CLICK"

 

RING RETURN FROM EFFECTS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CHANNEL INSERT OPTIONS

 

 

 

 

 

 

DIRECT OUT WITH

 

DIRECT OUT WITH

FOR USE AS AN

 

 

 

 

NO SIGNAL

 

SIGNAL

EFFECTS LOOP

 

 

 

 

INTERRUPTION

 

INTERRUPTION

(TIP= SEND,

 

 

 

 

TO MASTER

 

TO MASTER

RING = RETURN)

120VAC 50/60 HZ 60W

POWER 1A/250V SLO BLO

ON

OFF

FUSE INSIDE

CAUTION:TO REDUCE THE

RISK OF FIRE, REPLACE WITH THE

SAME TYPE FUSE AND RATING

LAYOUT

AND

FUNCTION

STEREO BALANCED OR UNBALANCED LINE INPUTS

14

13

12

11

10

9

8

7

6

5

4

3

2

1

(MONO)

L

R

 

MAIN/TAPE OUTPUTS

 

TAPE INPUTS

 

 

 

 

MIC PREAMP GAIN

 

 

CHANNEL INSERTS

 

L

R

 

L

R

1

 

2

4

3

2

1

 

L

L

 

G

AI

N

PHANTOM

G

AI

N

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

POWER

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

L

 

R

R

 

10dB

 

 

50dB

+48V

10dB

 

50dB

 

 

 

 

 

 

 

 

 

 

 

 

R

L

R

1

2

 

MAIN INSERTS

MIC PREAMP

MIC IN

 

 

 

OUTPUT

 

3.As a send-return insert for processing. Use a 1⁄4" TRS (stereo) plug “Y”-ed to two mono (TS) 1⁄4" plugs. The tip should be wired to send to the effect’s input, and the ring should be wired as the return from the effect back into the LM-3204. The sleeve is the common ground connection.

See the Insert Jack diagram at left. The same diagram is on the back panel of the LM-3204 for your wiring convenience. Bring your own flashlight.

MAIN/TAPE OUTPUTS

The Left and Right Main Outputs are each electronically balanced, line level outputs, capable of driving line levels of –10dBV or +4dBu equally well.

Each output jack is wired as a TRS (Tip- Ring-Sleeve) 1⁄4" phone jack. Like the balanced input jacks, the tip of the jack is wired to the “high” side of the input circuitry, the ring is wired to the “low” side, and the sleeve is the circuit ground connection.

Standard TS (Tip-Sleeve) 1⁄4" phone plugs

may be connected to the LM-3204 Main Outputs for connection to unbalanced equipment. The sleeve of the TS plug will automatically connect the low side of the jack to ground and unbalance the output.

There is no change in signal level when using an unbalanced (TS) cord instead of a balanced (TRS) cord.

The Main Outputs also appear as unbalanced outputs on the Tape L–R Out RCA jacks immediately to the right. (Also able to drive –10 to +4.)

MAIN INSERTS

The main left and right output circuits also have insert jacks available on the back panel. Like the channel inserts, these jacks allow you to tap the signal out of the circuit for processing in another piece of equipment and then return the processed audio back into the LM-3204. In this case, the entire main left-right mixing buses will be processed.

The main inserts occur just

after the bus summing amplifi-

ers and before the master Left

and Right faders. When “print-

ing” a mix, this would be the place to patch in a stereo compressor/limiter, EQ and/or aural exciter. If you’re using the LM-3204 for live sound, you may want to patch in a stereo graphic equalizer or anti-feedback processor here.

The main inserts are the same as the channel inserts in regard to send/return, direct, and direct with interrupt wiring. See the three ways to use

13