Carvin C2440 Overview, Channel EQ with Active Tone Circuits, Internal Signal Routing, Headroom

CARVIN ENGINEERING DATA C2440 24CH C3240 32 CH 4 BUSS MIXER OPERATING MANUAL

Congratulations on the purchase of your mixer. Your new 4 buss Concert Series mixer demonstrates CARVIN’s commitment to producing the highest quality and most sophisti- cated engineering in the audio industry today. The “C” series mixers are designed to be pro- fessional mixers for use in live performance sound reinforcement systems & studio appli- cations. Features include a full function 4 buss console with stereo out, mono out, and grouped phantom power. The high quality construction will provide years of performance in and out of the studio. Enjoy your new mixer.

OVERVIEW

The MIC/LINE input channels feature Balanced XLR and TRS 1/4” inputs with grouped phantom power for condenser mics. There are 3 bands of EQ with MID SHIFT and LOW CUT switches, 2 pre or post fader AUX sends and 4 accessable post fader AUX sends on each channel. The master section features 4 sub Groups faders, 2 Master Stereo faders, a Center fader for mono. Also featured in the master section are the 6 AUX send Masters and 4 stereo returns.

CHANNEL EQ WITH ACTIVE TONE CIRCUITS

The Concert Series incorporates 3 bands of EQ per channel. They offer smooth non inter- active tone curves so your adjustments will sound natural and yet be effective. The high (treble) and low (bass) “shelving” type controls cover the complete upper and bottom por- tions of the audio range. The LOWCUT switch provides instant elimination of unwanted low frequencies below 75 Hz. The MID EQ controls are a “band pass” type which peak at 2.5k Hz or 700 Hz (depending on the MIDSHIFT switch) for added presence to your mid range tones . Because CARVIN uses “active” tone circuits, you are able to boost or cut your tones without any signal loss to your sound.

RECEIVING INSPECTION—read before getting started

INSPECT YOUR MIXER FOR ANY DAMAGE which may have occurred during shipping. If any damage is found, please notify the shipping company and CARVIN immediately.

SAVE THE CARTON & ALL PACKING MATERIALS. In the event you have to re-ship your unit, always use the original carton and packing material. This will provide the best pos- sible protection during shipment. CARVIN and the shipping company are not liable for any damage caused by improper packing.

SAVE YOUR INVOICE. It will be required for warranty service if needed in the future. SHIPMENT SHORTAGE. If you find items missing, they may have been shipped sepa-

rately. Please allow several days for the rest of your order to arrive before inquiring. RECORD THE SERIAL NUMBER on the enclosed warranty card or below on this man-

ual for your records. Keep your portion of the card and return the portion with your name and comments to us.

INTERNAL SIGNAL ROUTING

A balanced mic or instrument plugs directly into the high quality Neutrik™ XLR con- nectors and is then routed into the differential circuits for excellent hum and noise can- cellation. As your signal continues within the console, a double-sided FR-4 (fire rated) printed circuit board carefully guards the circuit traces with a copper shield running over the traces. This reduces RF interference and crosstalk substantially. The printed circuit board has plated-through holes which means every component is soldered securely in three places (on the bottom, in the hole and on top). This offers unsurpassed compo- nent security while reducing circuit resistance for pure dynamic sound.

HEADROOM

Headroom is very important when designing a mixer—especially for recording. Lack of headroom will cause your sound to become distorted and muddy. This can happen when you turn the volume too high, the input signal is too hot or excess EQ is added. With most mix- ers, you have to reduce the input gain to fight headroom problems, but this just increases noise. That’s why we have taken great care in the “C” series to make sure that each gain stage is properly designed and balanced for more headroom along the entire audio path.

SWITCHING POWER SUPPLY

The Concert Series power supply offers unsurpassed rejection of noise and hum while providing precision voltage for all preamp stages. The internal switching power supply takes the 60 Hz AC line input and immediately converts it to 100kHz well outside of the audio range. The 100kHz AC is sent through a transformer and converted to precision DC voltages. Now you can go anywhere and never worry about inconsistent sound due to fluctuating voltages because your mixer automatically switches internally to use 120 or 240VAC. (120VAC & 240VAC compatible with the proper AC cable) CARVIN has spared no expense to achieve the best possible quality & performance.

For your records, you may wish to record the following information.

Serial No.________________________________ Invoice Date_______________

C2440 BLOCK DIAGRAM

CHANNELS INSERT

MIC		LO
		CUT
		MIC
		PRE
LINE	PAD
	line pad
	(-11dB)	GAIN

PFL

THREE BAND CHANNEL TONE

CONTROLS

MUTE

HI MID LOW

PRE - POST

LEFT

EFFECTS RETURNS

ONE AND TWO

RIGHT

LEFT

TAPE IN

RIGHT

		HEADPHONE
		AND METER
		SWITCHES
	PAN				HEADPHONE
				L - R
					LEVEL
			METERS
	AUX					HEADPHONE
LEVEL						OUTPUT
	3-5
		LEFT AND RIGHT BUSS			BAL OUT
	AUX
					Unbal OUT
	4-6	FADER	L-R & C			BAL OUT
					MONO
	AUX 1	PAN
					MONO	Unbal OUT
		GROUPS 1-4			FADER
	AUX 2			Unbal
		FADER
				OUT
			AUX 1 & 2
		LEVEL			BAL TRS
	AUX		AUX 3 - 6

LEVEL

RETURN

LEVEL

SOURCE

SWITCH TAPE OUT

LEFT

RIGHT

LEFT

AUX 3

AUX 4

RIGHT

C2440 SPECIFICATIONS:

Frequency Response:	Mic or Line Inputs: 20Hz-20KHz ±1dB
Total Harmonic Distortion: Less than .01%
Equivalent Input Noise:	150 ohm source: -112dBu
Output Noise:	less than -90dBu Master Line Out
	(all levels minimum)
Output Headroom:	+28dB XLR bal, +20dB 1/4” unbal
Maximum Gain:	Mic in to Master Line Out: 74dB
Crosstalk:	Adjacent ch’s: -60db at 1KHz
Common Mode Rejection: -80db at 1KHz
Phantom Power:	All XLR Mic in (channel groups of 8)
Channel EQ.:	3 band active,	LOW: 80Hz
±15dB
	MID: 2.5K or 700 Hz±15dB
	HI: 11.5KHz ±15dB
Mic Input:	Balanced XLR input
Line Input:	Balanced 1/4” Phone Jack
Power Consumption:	40VA
Size:	14”D x 30”W x 3.1”H

12340 World Trade Drive, San Diego, CA 92128

76-02440 798

(619)487-1600 (800) 854-2235 www.carvin.com