Carvin C2448 Group PFL Switches Group Assignment Switches, Comp 1-4 Group Compressors, Source

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24. GROUP PFL SWITCHES					25. GROUP ASSIGNMENT SWITCHES
These PFL switches allow the operator to monitor the entire					These switches send the sub-group mix to the main L/R faders.
GROUP mix. If distortion is heard or if the PFL level is near					For mono mixing, assign to both L/R.
PEAK on the Master L/R METERS, lower the channel faders					26. COMP 1-4 GROUP COMPRESSORS
assigned to that group. Also check the channel PEAK LEDs.
					/ LEDs
					Each of the 4 sub groups features a compressor, which will
					reduce the output when it gets above the level you set with
17	40	41	38 39 46			the COMP control. Set at “0” there is no effect.
						As you turn UP the COMP knob, the lower the
						maximum level. The compressor circuit is
						pre-fader, so you can set the COMP once and
					44	still adjust the group fader as needed. The LED
						will indicate when the compressor is working.
						27. COMP LINK SWITCHES
					45	These switches link the COMP controls for
						stereo pairs of equal setting. The COMP1 or
					42	COMP3 control becomes the master for the
					43	pair. Link 1-2 or 3-4.
					36	28. MASTER L/R FADERS
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						These faders adjust the level of the main stereo
					34	output created by all channels and groups
						assigned to L/R faders. Output appears at the
					37	L/R balanced XLR connectors (#44).
						29. MONO/SUB CONTROL
						A mono output is created from the L/R master
						faders (post) for center, subwoofers, or side
					33	fill speakers. The output is at the MONO/SUB
						XLR connector (#45).
					18	30. REC OUT/USB CONTROL
						This control sets the level sent to REC OUT
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						L-R RCA jacks and to the rear USB port. The
					19, 20, 21
	19	20	21		31	signal source is the main L-R mix (pre-fader).
						31. HEADPHONE AND METER
					30	SOURCE
						The stereo PHONES control sets the level
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						of the PHONES jack (#42). The PFL, L/R,
					29	MONO, MON 1-MON 6, USB IN, and REC OUT
					27	USB switches allow for monitoring of these
					26	sources through the headphones and the L/R
						LED meters (#33).
					24	32. PFL RED LED
						Indicates that the headphone & meters are
						monitoring only the channels or groups
						where the PFL is switched on.
						33. L/R LED VU METERS
						This group of 10 LED’s offer 6 dB increment
						resolution that give the operator a visual indica-
		23	25	28		tion of the mixer’s output levels, selectable by
						the METER SOURCE or PFL switches (#31).

34.DUAL PRECISION 9 BAND GRAPHIC EQs are one octave filters at 60,125, 250, 500, 1k, 2k, 4k, 8k & 16k Hz centers that offer ±12dB adjustment to help eliminate feedback & enhance tone for the main or monitor mix.

35.EQ SWITCH 1 & 2

These switches swap the 9 band EQ’s from the standard L/R main outputs “OUT” to the MON 1 & MON 2 outputs “IN” respectively.

36. USB POWER PORTS

Use these ports to supply +5V USB power to run accessories like LED lighting or to charge MP3 players. Connect audio outputs to RETURNS 3 or 4, or to channel inputs.

37.POWER BLUE LED Verifies the mixer is on.

38.EFFECTS 1 & 2 OUTPUT JACKS

1/4” outputs drive external effects. Connect your effects processor’s inputs to these jacks.

39.RETURNS 3 & 4 L-R INPUT JACKS

Returns a stereo signal from an external effect. Connect your effects processors’ stereo outputs to these jacks. If only one jack is used, the mono signal will go to both L/R .

40.MONITOR 1-6 XLR OUTPUT CONNECTORS

The C48 Series provides balanced XLR outputs. Connect your monitor power amps to these connectors.

41.GROUP 1-4 OUTPUT JACKS

The C48 Series provides 4 balanced 1/4” outputs. Connect your 4-track recorder or side fill power amps to these jacks.

42. HEADPHONE JACK

1/4” stereo jack for headphone or control room output.

43.REC OUT L-R RCA JACKS

RCA jacks for connecting to a recorder input.

44.LEFT & RIGHT XLR OUTPUT CONNECTORS

This set of balanced XLR connectors are for connecting the main L/R output to power amps or recording gear.

45.MONO/SUB XLR OUTPUT CONNECTOR

A balanced XLR output is featured for side fills or subwoof- ers.

46.REAR USB CONNECTOR

This rear USB connector will transmit audio to and from a computer for recording with compatible software and driv- ers. Output signal is the pre-fader L-R stereo mix sent via the REC OUT USB LEVEL. Input from a computer comes into the RETURN 4 bus, controlled at the RTN4/USB control.

CONCERT 48 SERIES BLOCK DIAGRAM 3