Owner's Manual

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CAUTION

RISK OF ELECTRIC SHOCK

DO NOT OPEN

SAFETY INSTRUCTIONS (EUROPEAN)

The conductors in the AC power cord are colored in accordance with the following code.

GREEN & YELLOW—Earth BLUE—Neutral BROWN—Live

U.K. MAIN PLUG WARNING: A molded main plug that has been cut off from the cord is unsafe. NEVER

UNDER ANY CIRCUMSTANCES SHOULD YOU INSERT A DAMAGED OR CUT MAIN PLUG INTO A POWER SOCKET.

IMPORTANT! FOR YOUR PROTECTION, PLEASE READ THE FOLLOWING:

WATER AND MOISTURE: Appliance should not be used near water (near a bathtub, washbowl, kitchen

sink, laundry tub, in a wet basement, or near a swimming pool, etc). Care should be taken so that

objects do not fall and liquids are not spilled into the enclosure through openings.

POWER SOURCES: The appliance should be connected to a power supply only of the type described

in the operating instructions or as marked on the appliance.

GROUNDING OR POLARIZATION: Precautions should be taken so that the grounding or polariza-

tion means of an appliance is not defeated.

POWER CORD PROTECTION: Power supply cords should be routed so that they are not likely to

be walked on or pinched by items placed upon or against them, paying particular attention to cords

at plugs, convenience receptacles, and the point where they exit from the appliance.

SERVICING: The user should not attempt to service the appliance beyond that described in the

operating instructions. All other servicing should be referred to qualified service personnel.

FUSING: If your unit is equipped with a fuse receptacle, replace only with the same type fuse. Refer

to replacement text on the unit for correct fuse type.

REFER SERVICING TO QUALIFIED SERVICE PERSONNEL!

This symbol is intended to alert the user

to the presence of uninsulated “dangerous

voltage” within the product’s enclosure that

may be of sufficient magnitude to consti-

tute a risk of electric shock to persons.

This symbol is intended to alert the

user to the presence of important

operating and maintenance (servic-

ing) instructions in the literature

accompanying the appliance.

LIMITED WARRANTY

Your Carvin mixer is guaranteed against failure for 1 YEAR unless otherwise stated. Carvin will

service and supply all parts at no charge to the customer providing the unit is under warranty.

Shipping costs are the responsibility of the customer. CARVIN DOES NOT PAY FOR PARTS OR

SERVICING OTHER THAN OUR OWN. A COPY OF THE ORIGINAL INVOICE IS REQUIRED TO

VERIFY YOUR WARRANTY. Carvin assumes no responsibility for horn drivers or speakers dam-

aged by this unit. This warranty does not cover, and no liability is assumed, for damage due to:

natural disasters, accidents, abuse, loss of parts, lack of reasonable care, incorrect use, or failure

to follow instructions. This warranty is in lieu of all other warranties, expressed or implied. No

representative or person is authorized to represent or assume for Carvin any liability in connec-

tion with the sale or servicing of Carvin products.

CARVIN SHALL NOT BE LIABLE FOR INCIDEN-

TAL OR CONSEQUENTIAL DAMAGES.

SERVICE:

In the USA go to www.carvin.com/cs

Outside the USA, contact your dealer or go to http://www.carvinworld.com for your nearest

service center. Include a written description of the problem with serial number and date of pur-

chase.

MAINTAINING YOUR EQUIPMENT

Avoid spilling liquids or allowing any other foreign matter inside the unit. The panel of your

unit can be wiped from time to time with a dry or slightly damp cloth in order to remove

dust and bring back the new look.

As with all pro gear, avoid prolonged use in caustic

environments such as dust or salt air. When used in such an environment, be sure the

mixer is adequately protected by a cover.

C1644P REAR PANEL

CC11664444PP PPOOWWEERR AAMMPP SSPPEECCIIFFIICCAATTIIOONNSS::

RMS Continuous Power: 4Ω (20-20kHz, .1%THD) 300W/amp

8Ω (20-20kHz, .1%THD) 200W/amp

Frequency Response: ±0.5dB, 20Hz-20kHz

±1.5dB, 10Hz-40kHz

THD: (50% output) 0.03%

Output Noise: < -75dBu speaker out (all levels minimum)

Protection Circuits:

Soft Start, Short Circuit, No Load, SpeakerGuard , Thermal

Shut-Off, Protect and Clip Indicators, Distortion-free Peak

Limiters.

Maximum Gain: Mic in to Speaker Out: 74dB

Power Requirements: 120VAC 60Hz or optional 240VAC 50Hz model, 1200VA

Size: 24”W x 16”D x 9”H

Weight: 38 lbs.

CC11664444PP RREEAARR PPAANNEELL FFEEAATTUURREESS::

1 & 2. SPEAKER OUTPUTS

The 1/4” JACK (1.), and TWIST-LOK JACK (2.) of each amp are wired in parallel.

The minimum load for each amp is 4 OHMS

. Chaining together more than one speaker on an output is

fine as long as the total impedance is not below 4 ohms. If the speaker load is lower than 4 ohms, the

amp may go into one of the PROTECT modes. (Two 8 ohm speakers in parallel = 4 ohms) 12 Gauge TWIST-

LOK speaker cables are an industry standard for high power applicattions (pin 1+ is POS, pin 1- is NEG,

pins 2+ and 2- are not used). The 1/4” jacks are used for lower power applications. Use only 16 gauge

(or heavier) speaker cables, NOT shielded instrument cables. Turn power off before connecting speaker

cables.

3. AMP ROUTING switch will select between two internally routed configurations:

OUT postion: AMP1-LEFT, AMP2-RIGHT, AMP3-MONITOR1, AMP4-MONITOR2

IN position: 1 amp each, for Monitors 1 thru 4.

Speaker output levels are adjusted from the Left/Right faders or Monitor 1-4 controls. The front panel

GRAPHIC EQs function with the amps, depending on the front panel EQ1 and EQ2 switch settings.

4. AMP PATCH INSERT jacks offer full flexibility for mixer to amp signal routing. These jacks are T-R-S

(Tip-Ring-Sleeve). Tip is the power amp input. Ring is the signal sent from the mixer determined by the

AMP ROUTING switch. The limiters are post insert. Patching a compressor or equalizer between the

mixer and the amp can be done by using a stereo insert cable (like Carvin’s AP1). Connect the RING

signal to the INPUT of the external device, and the TIP signal from the OUTPUT of the device. Plugging

in a standard 1/4” cable (mono) into the AMP PATCH INSERT jacks allows any external signal to be sent

to the internal power amps.

***DO NOT USE A BALANCED CABLE***

For example, you may want to patch the GROUP outputs (1-4) into the power amps.

-Plug one end of each cable into the GROUP jacks on the top panel of the mixer.

-Plug the other ends of the cables into the AMP PATCH INSERT jacks.

The GROUP 1-4 faders will now control what is heard at the SPEAKER OUTPUTS.

C1644P FRONT PANEL INDICATORS:

5. AMP CLIP LEDs - The red CLIP LEDs will flash when the particular amp has reached it’s maximum

output. Occasional flashing caused by bass frquencies is OK. Consistent flashing caused by higher fre-

quencies may damage drivers due to excessive distortion. This will not damage the amp.

6. PROTECT LED - The yellow LED indicates the power amp system has gone into one of its protection

modes. There will be no output from the amps. If the amp output has been short circuited, or overloaded

by putting less than 4 ohms on the output the amp will go into protection. Check for shorted speaker

cables and speaker impedance, then reset the POWER switch (off-on). If the amp has overheated, lower

the volume and make sure the fan vents are not blocked. Wait for the fan to cool the amps. Normal oper-

ation will return in about 1-3 minutes.

C1644P 1200w Powered Mixer

C1644P FRONT PANEL

THREE BAND 

CHANNEL TONE 

CONTROLS

PAD

GAIN

MID

LOW

MIC

PRE

CHANNEL

FADER

LEFT

TAPE IN

RCA

PAN

RIGHT

CHANNELS

line pad

(-16dB)

PHONES

LEVEL

PHONES

OUTPUT

RIGHT

LEFT

EFFECTS RETURN

3L - 3R

HI

RETURN 3

LEVEL

L - R

METERS

INSERT

MIC

LINE

LO

CUT

MUTE

PFL

LEFT & RIGHT

BAL OUT

HEADPHONE 

AND METER

SWITCHES

L - R

LEFT

RIGHT

EFF 1

EFF 2

PFL

MON 1 - 4

LEVEL

LEFT

FADERS

GROUP 1

MUTE

TAPE OUT

GROUP 2

GROUP 3

GROUP 4

MON 3

MON 4

MON 1

MON 2

GROUPS 1 - 4

1 - 4

BAL TRS

SWITCH TO

GRAPHIC EQ

RIGHT

ƒ

REQ

LEFT

RIGHT

EFFECTS RETURN

4L - 4R

TAPE IN

RTN 4

LEVEL

SWITCH TO

GRAPHIC EQ

MON 1 & 2 ONLY

PFL

MONO

BAL OUT

RIGHT

LEFT

ASSIGN

EFF SNDS

1 & 2

DSP x 2

MON 1 - 4

TO

L & R

TO

MONS 1 - 3

FADERS

LEFT

RIGHT

EFF 1

EFF 2

PFL

GROUP 1

GROUP 2

GROUP 3

GROUP 4

MON 3

MON 4

MON 1

MON 2

SIGPEAK

STEREO

IN 1

IN 2

MON 1

MON 2

MON 3

MON 4

EFF 2

EFF 1

CARVIN ENGINEERING DATA C844, C1644(P), C2444, C3244 4-BUS MIXER OPERATING MANUAL

76-02444D 1008

C1644 BLOCK DIAGRAM

MONO

0 0 0

010

RTN 3 MON 2MON 1 MON 4RTN 4 MON 3

TAPE INRETURN MONITORS

010

MONO

L-R

+18

+12

PEAK

POWER

PFL

PHONES

EQ 1

LEFT /

MON 1

EQ 2

RIGHT /

MON 2

CONCERT SERIES

C1644

010

LEFT

RIGHT

LEFT

RIGHT

LEFT

RIGHT

LEFT

RIGHT

125 250 50063 1K 2K 4K 8K 16K

–12

+12

12-

12+

–12

+12

12-

12+

TAPE IN

TAPE OUT

MON 1

423

PHONES

EFF 1 3L 3R

RETURN

MONO

MON 2 MON 3

RTN 4

MON 4

EFF SW

EFF 2

GROUPS

METERS

1234LR

PFL PFL PFL PFL

1-2

3-4

MON

43218765

87654321

LINELINELINE LINELINELINELINE

86543217

1- 8

PHANTOM

POWER

MICMICMICMICMICMICMIC MIC

INSERT INSERT INSERT INSERT INSERT INSERT INSERT INSERT

121110916151413

161514131211109

9-16

PHANTOM

POWER

MIDMIDMIDMIDMIDMIDMIDMID

HIHIHIHIHIHIHIHI

FREQFREQ FREQFREQ FREQFREQ FREQFREQ

PFL

MUTE

3-4

1-2

L-R

100 5k

010

PANPA NPANPA NPA NPANPA NPAN

PEAK

SIG

PEAK

SIG

PEAK

SIG

PEAK

SIG

PEAK

SIG

PEAK

SIG

PEAK

SIG

PEAK

SIG

050

GAIN

LO CUT

LINE

PFL

MUTE

3-4

1-2

L-R

100 5k

010

050

GAIN

LO CUT

PFL

MUTE

3-4

1-2

L-R

100 5k

010

050

GAIN

LO CUT

PFL

MUTE

3-4

1-2

L-R

100 5k

010

050

GAIN

LO CUT

PFL

MUTE

3-4

1-2

L-R

100 5k

010

050

GAIN

LO CUT

PFL

MUTE

3-4

1-2

L-R

100 5k

010

050

GAIN

LO CUT

PFL

MUTE

3-4

1-2

L-R

100 5k

010

050

GAIN

LO CUT

LOW LOW LOW LOW LOW LOW LOW LOW

PFL

MUTE

3-4

1-2

L-R

100 5k

010

050

GAIN

LO CUT

LINELINELINE LINELINELINELINE

MICMICMICMICMICMICMIC MIC

INSERT INSERT INSERT INSERT INSERT INSERT INSERT INSERT

MIDMIDMIDMIDMIDMIDMIDMID

HIHIHIHIHIHIHIHI

FREQFREQ FREQFREQ FREQFREQ FREQFREQ

PFL

MUTE

3-4

1-2

L-R

100 5k

010

PANPA NPANPA NPA NPANPA NPAN

PEAK

SIG

PEAK

SIG

PEAK

SIG

PEAK

SIG

PEAK

SIG

PEAK

SIG

PEAK

SIG

PEAK

SIG

050

GAIN

LO CUT

LINE

PFL

MUTE

3-4

1-2

L-R

100 5k

010

050

GAIN

LO CUT

PFL

MUTE

3-4

1-2

L-R

100 5k

010

050

GAIN

LO CUT

PFL

MUTE

3-4

1-2

L-R

100 5k

010

050

GAIN

LO CUT

PFL

MUTE

3-4

1-2

L-R

100 5k

010

050

GAIN

LO CUT

PFL

MUTE

3-4

1-2

L-R

100 5k

010

050

GAIN

LO CUT

PFL

MUTE

3-4

1-2

L-R

100 5k

010

050

GAIN

LO CUT

LOW LOW LOW LOW LOW LOW LOW LOW

PFL

MUTE

3-4

1-2

L-R

100 5k

010

050

GAIN

LO CUT

PARAMETER

ECHO

REGEN

TIME

REVERB

DAMPING

DECAY

FLANGE

SPEED

DEPTH

CHORUS

REV LEVEL

DEPTH

SELECT

MUTE

OFF

1MON 2MON

OFF

1MON 3MON

24-BIT DUAL STEREO EFFECTS

SELECT PARAMETER

101

EFFECTS 2

TO MONITORSRETURN

EFFECTS 1

100

161514131211109

4444 4444

3333 3333

2222 2222

1111 1111

MON MON MON MON MON MON MON MON

EFFEFFEFFEFF EFFEFFEFFEFF

1111 1111

2222 2222

4444 4444

3333 3333

2222 2222

1111 1111

MON MON MON MON MON MON MON MON

EFFEFFEFFEFF EFFEFFEFFEFF

1111 1111

2222 2222

C1644

CONCERT 44 SERIES The

CC884444,, CC11664444((PP)),, CC22444444

and

CC33224444

feature 8 to 32 channels with true 4-

bus performance. The

CC11664444PP

adds four 300 watt power amplifiers built into our ROAD WARRIOR case. Never

before have so many features been packed into such a rugged, compact USA made mixer. The best feature of

the Concert 44 Series is the sound. Sound that is pure and quiet enough for digital recording studios. Everything

is logically laid out making the powerful features simple to use. The knobs have been located so that adjust-

ments can be made quick and easy with visible pointers showing you the status of your mix at a glance.

TRUE 4-BUS DESIGN The Concert 44 Series offers increased mixing flexibility over standard stereo con-

soles by letting you assign channels to one of the 4 sub groups or L/R. This allows you to mix the entire drum,

horn, choir, etc. into one sub group, which feeds the L/R faders. This is an easy way to control the volume of

grouped mics and inputs. If you don’t need subgrouping, you can depress the L/R channel button and the

channel goes directly into the L/R output like a standard stereo console. All 4 sub group outputs have bal-

anced outputs for long cable runs.

TWO EFFECT SENDS / TWO 24-BIT EFFECT PROCESSORS Two built-in 24-Bit effects, each offering

256 stereo effects, is a first in a 4-bus mixing console. Since there are two, you no longer have to choose between

that great vocal reverb with delay and that awesome guitar chorus - you can have both! Each processor offers

lush REVERBS, rich CHORUSES, thick textured FLANGING and pristine ECHOES with fully adjustable parame-

ters for damping, decay, depth, speed, time and regeneration. Both processors can be sent back into the moni-

tor mix so the performers can hear exactly what the audience is hearing.

FOUR MONITOR SENDS Every channel has 4 MONITOR sends with MASTER output level controls. Monitor

send jacks are balanced TRS.

3 BAND EQ/MID SWEEP The superb EQ system gives extended 15 dB boost and cut tone shaping. The

LOW frequency control builds bass starting with 20 Hz through 80 Hz for a solid non-flabby low-end. The exclu-

sive offset of the MID FREQ. control ends the confusion of selecting your mid frequency from 100 Hz to 5kHz.

The MID cut and boost control adjusts the gain to the perfect mid-dip or boost curve to enhance all instruments

and vocals. The 11.5k Hz HI treble control adds sparkle to your top-end without adding harshness. Both the

LOW and HI are “shelving”, which means they are effective from 20 Hz and up to 20k Hz. The LO CUT switch

eliminates stage rumble or other unwanted low frequencies that would normally rob power from your woofers.

TWO 9 BAND EQUALIZERS Precision equalizers provide 1 octave adjustments to tune in your overall sound

and control feedback. Unlike one stereo equalizer, two independent 9 bands offers total flexibility. With two

convenient buttons, you can assign either EQ to the R/L outputs or to the 1/2 monitor outputs. Center frequencies

are 63, 125, 250, 500, 1k, 2k, 4k, 8k & 16k Hz.

RECEIVING INSPECTION—read before getting started

INSPECT YOUR MIXER FOR DAMAGE which may have occurred during shipping. If 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 possible protection during

shipment. CARVIN and the shipping company are not liable for 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 separately. 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 manual for your

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

USA customers register online at: www.carvin.com/registration

All other countries register online at: www

.carvinworld.com/registration

CHANNEL FEATURES Every channel has a full balanced XLR and LINE (1/4”) preamp with an INSERT

jack for a compressor or EQ that also serves as a DIRECT OUT when plugged half way. The PAN con-

trol directs the channel into the L/R output or any of the 4 sub groups after depressing the appropriate

ASSIGN switches. A PFL (pre fader listen) switch allows you to hear the channel in the headphones

before the fader is turned up. A solid “on” condition of the PEAK LED indicates that the MUTE switch

has been activated which turns the channel off including all monitor and effect sends. When flashing

during use, the PEAK LED also lets you know when to adjust the channel’s GAIN control to prevent chan-

nel cliping. The SIGNAL LED lets you know that a signal is coming through the channel starting at –20

dBu. A silky smooth 60mm audio taper FADER delivers professional fade-outs. The PHANTOM power

switches provide power through the XLR connectors for use with condenser mics like the Carvin CM90E

in groups of 8 channels.

MASTER FEATURES Each of the 4 SUB GROUP faders can be switched to the R/L outputs or used

independently through their own balanced output jacks. Each of the sub group’s PFL switches allow you

to listen to the sub groups in your headphones before it is turned up. The R/L MAIN output faders are

independent for added flexibility over a single stereo fader. A MONO control sums both the R/L outputs

together (pre-graphic EQ) for a center, side fill or subwoofer output. The stereo HEADPHONE control

tracks the METER switches which allow you to look and listen from the L/R, MONO, MONITOR 1/2 and

3/4 outputs and channel PFL switches. The master section also features 2 EFFECT SENDS, 4 RETURNS

and RCA TAPE IN/OUT jacks. All 4 SUB GROUPS, 4 MONITORS, XLR L/R and MONO outputs are bal-

anced. A FOOT SWITCH jack turns both effects processors on or off remotely with the optional FS22

foot switch.

SWITCHING POWER SUPPLY Our exclusive 125k Hz switching power supply eliminates trans-

former noise. Like a laptop computer, go anywhere in the world and not worry about power because

you can run on any voltage from 90 to 250VAC. (

except C1644P

)

SUPERB SOUND State-of-the-art low impedance, low noise preamps are featured on every channel.

The balanced common mode rejection is better than 70 dB to eliminate cable noise. All main outputs are

balanced to guard against system noise. The near theoretical limit on distortion has been achieved with THD

below .01% to guarantee the purity of your sound, ensuring it will be dynamically open and transparent.

ENGINEERED TO LAST Hidden deep in the heart of these San Diego, CA made mixers is the SMT con-

struction that utilizes surface mounted components to prevent malfunctions caused by vibrations. Sealed

controls and switches guard against the outside elements while heavy-duty jacks provide a positive con-

nection to your cables. Fire retardant FR-4 military spec circuit cards feature double-sided copper to elim-

inate radio frequency interference. Precision 1% tolerance components guarantee your settings will be

accurate every time. The Concert 44 Series is built to strict standards.

For your records, you may wish to record the following: Serial No.________________________ InvoiceDate___________

Optional Accessories:

C844: CB800 Heavy padded bag FS22 foot switch for all models

C1644: CB1600 Heavy padded bag RW1644 Road Warrior™ case

C2444: CB2400 Heavy padded bag RW2444 Road Warrior™ case

C3244: RW3244 Road Warrior™ case

CONCERT 44 SPECIFICATIONS:

For C1644P power amp specifcations, see back page

Mic Input: Balanced XLR, Mic Imp. 150Ω

Line Input: Balanced 1/4” Jack Imp. 10k/20k bal.

Frequency Response: Mic or Line Inputs: 20Hz-20KHz ±0.5dB

Total Harmonic Distortion: Less than .01%

Equivalent Input Noise: 150 ohm source: -117dBu

Output Noise: less than -90dBu Master Line Out

Output Headroom: +28dB XLR bal, +20dB 1/4” unbal.

Maximum Gain: Mic in to Master Line Out: 74dB

Crosstalk: Adjacent channels: -60db at 1KHz

Common Mode Rejection: -75db at 1KHz

Phantom Power: All XLR Mic in (channel groups of 8)

Channel EQ.: 3 band active,LOW: 80Hz ±15dB

MID: 100Hz to 5kHz ±15dB

HI: 11.5KHz ±15dB

9 Band Graphic EQ.: ±12dB 63, 125, 250, 500, 1k, 2k, 4k, 16k

Mixers Only: 90 to 250VAC 50-60Hz, 20 to 50VA

Powered C1644P:

120VAC 60Hz or 240VAC 50Hz model,

1200VA

Size: C844: 14.25”D x 14.5”W x 3.25”H

C1644: 14.25”D x 22.25”W x 3.25”H

C1644P: 16”D x 24”W x 9”H

C2444: 14.25”D x 30”W x 3.25”H

C3244: 14.25”D x 38.1”W x 3.25”H

“OUT” position turns on front L/R speakers

Summary of content (4 pages)

PAGE 1
4 1 2 MIC LINE MIC LINE MIC LINE MIC LINE 1- 8 PHANTOM POWER MIC LINE MIC LINE MIC LINE MIC LINE 9-16 PHANTOM POWER INSERT MIC 16 LINE INSERT MIC 15 LINE INSERT MIC 14 LINE INSERT MIC 13 0 50 GAIN 0 INSERT 0 50 GAIN 0 12 0 50 GAIN 0 INSERT 0 50 GAIN 0 11 0 50 GAIN 0 INSERT 0 50 GAIN 0 10 0 50 GAIN 0 9 0 50 GAIN 0 INSERT LINE MIC LINE 10 10 -15 +15 0 5 5 1 10 3 10 1 MON -15 +15 0 0 EFF 100 5k MID 0 5 5 5 10 10 10 LOW 2 0 0 4
PAGE 2
LINE LINE LINE MIC LINE 5 10 10 LOW 0 2 5 5 0 -15 +15 5 5 5 5 5 10 10 LOW 0 2 0 4 0 -15 +15 5 5 1 10 3 10 1 MON 0 0 5 5 5 10 10 10 LOW 0 2 0 4 0 2 0 -15 +15 5 5 1 10 3 10 1 MON 0 0 5 EFF +12 +6 0 -6 -12 -24 HI 5 5 5 10 10 10 LOW 0 2 0 4 0 2 PAN MUTE PFL 1-2 3-4 L-R -15 +15 0 -15 +15 5 5 1 10 3 10 1 MON 0 0 5 L C 10 EFF 0 +12 +6 0 -6 -12 -24 1k LO CUT HI MID 100 5k 5 5 5 10 10 10 LOW 0 2 0
PAGE 3
SOUND CHECK In a live sound reinforcement system, the input signals to the mixer will come from the microphones and instruments. Each microphone or instrument must be connected to one of the mixing console inputs. It is preferred to have as many of the stage instruments as possible plugged into the mixer. This allows for the best overall control of the instruments as they are mixed together and then amplified by the system.
PAGE 4
INSERTS AND DIRECT OUTS 1/2 INSERT DIRECT OUT FULL INSERT FULL INSERT The insert jack is a Tip Ring Sleeve (TRS) 1/4” phone jack, where the tip is the send, the ring is the return and the sleeve is ground. When used as an insert point or in full INSERT mode, the channel is opened up to allow an external piece of equipment to be inserted into the channels signal path.