Altec Lansing 3300A User's Manual
Contents
1. CRUST NI te sega ee AS Component Easting s s care scare CER E QUE a 24 Pune i Topical gies eui wma ROT o e mere Se Figure 2 Typicaloutput su ass sani asians Cleese Baw EUR ee PATENS 8 Figure 8 Tyjacdlinsert 2 2 2 49 OR T ie e 4 Figzro 4 Inpatehanneloonirolg s ra 2x4 eus 2 4 Wales Rie E Via WIS DN cs 4 Figure Output section conirolB pissi ros Hee 6 Figure 6 Rear panel input connectors ac DHS ES HERD Salat 7S Figure 7 Rear panel output connectors ea EAE EIS EAS E S Oe stare 9 Rer Danes etm cmm hmmm REIR Ri EX ENTM ES 10 Figure B SA o NUM Flow spore PETS NEU Tim Xt too Row2. he source of this signal is via the individual AUX 1 and send level controls on each input channel Effects RETURN AUX AUX 2 The effects RETURN level control determines the amount of externally generated effects signals in the main mix This signal is mixed into the left and right stereo sub channels via the AUX 1 AUX 2 PAN control s PAN Control AUX 1 AUX 2 The effects PAN control AUX 1 AUX 2 directs the signal coming from the effects ALTEC LANSING CORPORATION a Mark IV Company Operating Instructions for the Altec Lansing 3300A Series Mixing Consoles RETURN level control s into the left and or right sub channels The control works in an identical way to the input channel PAN control Master Section Controls The master section controls affect the subgroup main and monitor output levels The use of subgroups can be shown by this example If the input channel PAN controls set fully clockwise for all the vo cals then the SUB fader has been assigned as a vocal sub master If the SUB fader is raised or lowered the vocal level in the mix can be set while preserving the input channel balance set among the vocalists 5A SUB L Left Submaster Controls the volume of the left stereo output channel It is also used as a subgroup master 5B SUB R Right Suomaster Controls the vol me of the right stereo or t channel is also dasasubgroup
3. me D AERTS E WAY AngdHl xnv Hina 3u xn inani 34n SIGNAL FLOW DIAGRAM 19 ALTEC LANSING CORPORATION a Mark IV Company Operating Instructions for the Altec Lansing 3300A Series Mixing Consoles Notes 14 ALTEC LANSING CORPORATION Mark IV Company
4. integral peak light located in the upper right hand corner of each meter shows when the output is above the 14 dB level and the headroom is being rapidly exhausted and distortion is imminent The meters read either left right stereo or main monitor level If any of the PFL switches are depressed the right meter will monitor the PFL bus signal PEL LED is provided on the meter bridge to acknowledge the condition LAMP Connector A BNC type socket is provided at the top of the mixer panel to accommodate Littelite gooseneck lamp to allow operation of the board in low light conditions These lamps are available in different lengths from professional sound dealers and attaches without tools The LAMP connector can accommodate either normal or high intensity lamps 11 POWER Switch The power switch is used to burn the main ac power on and of 12 POWER Indicator This LED green is illuminated when the main ac power is on 18 PHANTOM Power Indicator This LED red indicates when phantom power is present the microphone inputs 14 PFL Indicator This LED amber indicates when the PFL circuit is activated and shows that the right meter is reading the PFL bus signa level 43 Rear Pane Input Connectors Refer to Figure 6 The 3300A series mixer can accept program material covering a dynamic range of over 100 dB of the line inputs can safely accept signal levels up to 20 dB
5. TAPE RECORD 1 SUB L OUTPUT stereo phone jack is used for both output from the input channel and for the return to the input channel from an external processing device Be sure that the device that is to be patched in has line level unbalanced inputs and outputs The signal at the insert jack can drive loads of 2000 ohms or greater and the external pro cessing device should have a low output internal impedance 100 ohms or less Refer to Section 3 8 of this manual and Figure 3 for proper connections nominal input signal is a level of 4 dBu the maximum level is 20 dBu Rear Panel Output Connec tions Refer to Figure 7 In the 3300A series mixers the SUB L SUB R MAIN and MONITOR 2 SUB R OUTPUT outputs servo balanced and made through chassis mount male 3 pin XLR type connectors to a maximum level of 24 dBu 12 3 Vrms All other output connections are line level unbalanced and made through standard inch phone jacks except for RECORD OUT 1 2 3 SUB L Ouipui This left sub group output is derived by sum ming all of the points channels and external sssigned to the left subgroup bus A PAN trol rotated fully counterclock wise to the L position will assign that signal only to the left bus SUB R This output is the right subgroup equivalent of the SUB L output MAIN Ouiput The MAIN output is the summed mix of ALTEC LANSIN
6. 20 kHz 1 3 dB 4 dBu 6000 VU Matens All melors cre calibrated for 0 VU 4 dBu output Harmonic Distarfion 2 illuminated meters LEFT MAIN RIGHT MONITORTT lass than 0 05 20 Hz 20 kHz 4 dBu in 6000 Lees than 0 10 20 Hz 20 kHz 24 dBu in 6000 Chip Indicators Input Channel 16 dBu 4 dB before clipping Noise VU Meters 14 dBu 10 dB before clipping A weighted 1500 Channel TRIM minimum 131 dBV Equivalent Input Noise lamp Connecior 12 Voc 375 mA maximum B7 Residual Noize 81 dBV SUB OUT Master fader nominal ell Input faders minimum Phantom Power 78 dBV SUB OUT Mosler fader and all Input faders nominal 48 Vde on electronically balanced micraphone inputs 6 8k source iones 77 AUX SEND Master foder nominal all AUX sends minimum 77 dBV AUX SEND Master fader and all AUX sands nominal Power Requirements 115 V er 230 V 50 60 Hz Voliage Gain 3 dB Power ConsumpGon 50 W 78 dB CH IN SUB amp MON OUT 86 dB CH IN MAIN OUT Console Dimensions 330BA 19 x6 63 x 17 5 483 145 445mm 52 dB IM CH INSERT 33164 29 x 6 25 x 20 75 737 x 159 527mm 88 dB CH IN AUX OUT CH fodar 33242 39 x 6 25 x 20 75 9913 157 527mm 20 dB AUX RETURN SUB OUT amp MON OUT 10 dB AUX IN AUX OUT Console 27 Ibs 12 3 kgs 10 dB MON IN te MON OUT 33164 40 Ibs 18 2 kgs 33244 53 Ibs 24 kga Input Ch
7. Figure 2 for typical output connections 3 3 Insert Connections Signal processing equipment may easily be inserted in the signal path by using the 44 inch phone TRS in sert connectors The external device must have line level unbalanced in puts and outputs The output signal from the mixing console is on the Tip and the input signal is on the Ring The Sleeve is ground Refer to Figure 3 a typical insert connection 4 OPERATION 4 1 Input Channel Controls Refer to Figure 4 The input channel is the beginning of the signal amplification chain of the mixer Each input channel will accept one signal so rce which may be equalized have effects added and sent to ihe monitor and main system for the audience to hear Each input has a low impedance microphone in put the 3 pin XLR connector and high impedance microphone or iine input 14 inch phone jack The line input will accepi signals from an instrument high impedance micro phone tape CD player keyboard or electronic drums or almost any other audio source Always make sure that the channel fader see Figure 4 EXTERNAL EFFECTS PROCESSOR Figure 3 Typical insert connection and or master faders see Ficure are down before plugging or unplug ging input sources 1 TRIM Control This control adjusts the gain of the input amplifier to accommodale the wide variation signal strength presented to the mixer by the endless variety o
8. changes in the main or house mix AUX Sends The AUX 1 send control sets the level of that signal in the AUX 1 mix and is post fader which means that it is affected by the gain setting of the fader The AUX 1 send may also be used as a mono send for recording The AUX 2 send control sets the level of that input signal in the AUX 2 mix and is switchable PRE or POST fader In the PRE position it serves as another MONITOR OUT and in the POST position another EFFECTS OUT PAN Control Short for pan oramic potentiometer this con trol allows the channel s input signal to be placed within the stereo image by assigning more or less of the signal to the left or right subgroup controls Turn ing the panpot to the left of center moves the apparent source toward the left channel Turning the panpot to the right of center moves the apparent source toward the right channel Centering the contro makes the apparent source centered be tween the channels If all inputs are panned center the result is mone Some users pan all the instru ments to one side and the vocals to the other and use the sub 8 group controls balance them PFL PFL pre fsder listen allows the opersior to preview any pre fader signal individually or in combination ihrough the headphone output To activate the PFL simply depress the ap propriate switches The status indicator will light indicating which pre fader signals are be in
9. mic input invites the introduction of high noise levels which could produce lower quality sound or an incorrect Lest measurement High Z Line Inpui standard phone jack is used for balanced or unbalanced line level signals Examples of these signals include most electronic keyboards drum machines and synthesizers tape 1 BALANCED LOW Z MIC INPUT Jperating Instructions for the Altec Lansing 3300A Series Mixing Consoles 8 CHANNEL INSERT 7 RETURNS INSERT L AND R 2 HIGH Z LINE INPUT decks CD players etc All input channel controls including the variable TRIM control affect the LINE input Maximum input level before preamp clipping is 24 dBu 12 3 Vrms If a sufficient signal level is not possible with the TRIM control at its furthest clockwise position the input signal must then be treated as a mic level signal and connected to the microphone input If necessary use an appropriate balancing transformer or a direct box with the microphone XLR input AUX RETURN AUX 1 and AUX 2 The AUX RETUEN jack s feed signals to the subgroup buses The signal is controlled by the RETURN and PAN front panel controls 4 AUX IN AUX 1 and AUX 2 The AUX IN jack s will put signals directly into the respec tive AUX bus Crosstalk and buffering protection provided by the input cire aig and the signal level is controlled by the external source MON IN The
10. ss ccs cos dia Karua DATEN ign andl wore 5 4 a iy mm Ed ris mU REA SOR HEROES sacle 4 4 1 Input Channel Controls ses se ees eee tee Es WE UR VES CX Wid 5240 4 49 Outeut Section Controls sea neres rbi We Hie RES ues 6 4S Roser Panel Input Connectors ou ses sesa ces cemer sacre RR mem SOS 5 20 KE Us EU 7 4 4 Rear Panel Output Connectors Qm RM NEM e WW COT aly 9 gp EE EIE m M cc ees ase 5 MOVEABLE REAR PANEL ON THE 3308A MIXER 9 wURUV AVIS RI 6 WBIIEONLABELB rig is ae 555856 31 7 SYSTEM SPECIFICATIONS 5 52 SX WGW xad em Xe tow 12 SERVICE INFORMNITON ees pa sew tmm tmm mmm gt hm Mum ve E Dr eis ES 16 Bi Ore tite verenna 22 272 lt D Rr E 16 8 3 Technical Assistance 16 8 4
11. G CORPORATION a Mark IV Company 5 Operating Instructions for the Altec Lansing 3300A Series Mixing CAUTION S DISCONNECT MANS BEFORE VOLTAGE SELECT 2rDucE 0 44 58 2507 ASSEMBLED TAIWAN Figure 8 Rear panel switches the left and right subgroup outputs Since the 33004 series are true subgroup mixers all signals that appear in the main mix must come through the subgroup channels MONITOR Output The MONITOR output signal is the sum of all the input channel monitor sends and the external monitor input signal AUX SEND AUX 1 and AUX 2 The AUX SEND out put signal is the sum of all of the input channel AUX sends PRE or POST fader plus any signal coming through the AUX IN input TAPE RECORD These output signals are the sum of all the input channels and efiects with their position in the L R stereo mix The TAPE RECORD 4 5 1 2 SEND 1 2 VOLTAGE SELECT SWITCH Consoles 1 PHANTOM POWER SWITCH 100 120 VAC 50 60 Hz 40 WATTS output is via RCA jacks fixed at 10 dBV for easy interfacing and compatibility with semi pro and hi fi tape decks Rear Panel Switches Refer to Figure 8 PHANTOM POWER Switch This switch turns the phantom power supply on and off The phantom power supply provides power for condenser type micro phones through the microphone cable When switched on it provides 48 volts de at pins 2 and 3 on al
12. LANSING sound of exper 3300A Mixing Consoles Operating Instructions amp ALTEC LANSING CORPORATION Box 26105 Oklahoma City OK 73126 0105 USA Tel 405 324 5311 FAX 405 224 8981 Operating Insiructions for the Altec Lansing 3300A Series Mixing Consoles TABLE OF CONTENTS I ELECTRICAL nyesa tips TA LA OT GU C TCI HORN TCU E A RORIS Ss faves 255 das 8 1 1 120 Vac 50 60 Hz Power Conneclioneg morem mim Kiser re kerna um ele ELE Bon gra 3 1 2 100 220 240 Vac 50 60 Hz Power Connections 8 2 INSTALLATION redu rs ES mu I IU 02 A ES 2 1 Rack oe ess m saw SHY siete Fogle Re Gite 22 Ventilation 2e WS SESE SOLE SUEDE Quelle NOM Siete S SIGNAL CONNECTIONS ies wee WU 18 RUP 3 9 1 Input Connections io se i Sra ki Lax ecn niv 2o RUNG Niele aon Nee MA 8 8 2 Output Connections iu SWS Ru WLS SE 3 8 Insert Connections ss
13. MON IN jack will put signals directly onto ihe monitor bus Crosstalk and buffering protection are pro vided by the input circuit and the signal level is controlled by the external source TAPE RETURN These RUA jacks allow a tape deck or CD player to be directly connected to the mixer The input is ed into the left and right sub groups and its level is controlled by the L and R front panel controls These jacis can ako be used as other AUX returns ALTEC LANSING CORPORATION a Mark IV Company 100 110 VAC 50 60 40 WATTS 4 MONITOR OUTPUT 5 MAIN OUTPUT INSERT L and R SUB L and SUB R space saving 3 conductor stereo phone jack is used for both output from SUB L and SUB respectively and for the return to the mixer s master section from an external processing device Be sure that the device that is to be patched in has line level unbalanced inputs and outputs The signal at the insert jack can drive loads of 2000 ohms or greater and the external processing device should have a low output internal impedance 100 ohms or less Refer to Section 3 3 of this manual and Figure 3 for proper connections A nominal input signal is a level of 4 dBu the maximum level is 20 dBu Input Channel INSERTs A space saving 3 conductor Figure 7 Hear panel output connectors 4 4 5 AUX SENDS Operating Instructions for the Altec Lansing 3300A Series Mixing Consoles 6
14. SIGNAL CONNECTIONS 3 1 Input Connections Balanced microphone inputs may bi made to the 3 pin ALR type con nector Balanced line inputs may bi made to the Vi inc phone TRS connector For single ended inputs strap the low input pin 3 o1 XLR or Ring on Vi inch phone ground Otherwise the electronically balanced input siage will see 6 dl less input signal level than with balanced input Refer to Figure 1 fo typical input connections UNBALANCE AD Not recommended for runs over 100 UNBALANCED z OUTPUT Y Not recommended for runs over 6 feei gt HOT 4 EN T E Figure 2 Typical output connections ALTEC LANSING CORPORATION Mark IV Company Operating Instructions for the Aliec Lansing 3300A Series Mixing Consoles TRIM CONTROL EQ CONTROLS MONITOR SEND AUX SENDS PAN CONTROL PFL CHANNEL PEAK LED CHANNEL FADER 3 2 Output Connections The main outputs of the mixing con sole electronically servo balaneed Balanced output connec tions may be made to the male 3 pin XLR type connectors For single ended outputs strap the low output 3 on XLE or Ring Ya inch phone to ground Otherwise the electronically servo balanced output stage will produce 6 dB less output signal level than with a balanced output connection Unbalanced connections may be made to the other inch phone TRS connectors Refer to
15. T MAIN PFL LED 11 5516 POWER STEREO MIXER SWITCH 14 PFL LED 15 POWER LED 9 TO TAPE MONITOR RETURNS SENDS 2 EFFECTS SENDS EFFECTS S 1 RETURNS Pi 27 EFFECTS PANS ares 3C MAIN 50 MONITOR Figure 5 Output section controls 4 2 4 freedom from clipping distortion If the fader must run wide open to get enough level turn up the TRIM control judiciously or increase the level setting of the left anc right subgroup controls Conversely if the fader must be pulled way back to get the right level the TRIM control or stereo subgroup should be adjusted Adjust the TRIM contro if the PEAK LED lights otherwise ad just the stereo subgroups optimum performance the channel FADERS should be run close to the 0 mark Output Section Controls Refer to Figure 5 TO MON Send AUX 1 AUX 2 The TO MON level control determines the amount o exier nally generated effects signals in the monitor mix With the use of this control the performers can hear the added effects in their monitors Effects SEND AUX1 AUX 2 The effects SEND contro sets the level of the signal appearing at the effects send output jack s going to any type of outboard effects device s such as a digital reverb flanger compressor limiter
16. annel Equolizafon 15 88 maximum boost or cul HiGH 10 kHz Shelving MID 300 Hz 5 kHz Peaking LOW 100 Hz Shelving Input Channel Control lo Z input 40 dB 12 dB 52 dB Altec Lansing continually sirives to improve products and performance Thor there Hi Z input dB 11 88 27 dB specificalions are subject lo change without 50 6000 mics 72 dBu 0 20mV 52 dBu 1 95mV 32 dBu 19 5mV XLR 3 termin For Use with Input Terminals Nominal Sensitivity Hi Z 27 dB CELTE ua an CH 1 22 dBu 61 6mN 2 dBu 6 20 dBu 7 757 INSERT Phone Jozi iam 47 dBu 3 4 mV 27480 34 6 7 dBu Jaci AUX IN MON IN 6000 tines 6 Bu 388 4 dBu 1229 26880 15 5V Phone loci T 1 Does paeem wewei xmas NOTES 1 Sensifivity is lowest level thai will produce a SUB output of 4 dBu 1 23 the nominal outpul level when the unil is sel lo maximum oll faders end level contrals ore in maximum posfifion 2 XLR 3 type conneclos are balanced CH Phone Jocks ore balanced T R 5 GND Other Phone Jacks and RCA Pin Jacks ore unbalanced Insert Phone are unbalanced T OUT R IN 5 GND 3 3308A 8 ch 33162 16 ch 33244 24 ch Actual Source For Use with Level Output Terminals Connector in Mise Imp
17. ce NEPOS EVES KOE MUR 18 Transformer Primary Winne DiBgra y saccis 2e ten mote me eoim 16 Mixing Console Wiring Diagram 222 17 Input ehsa ACA TENNCS EOS NUNC RURDW 18 Bub Board 2 2 nis auo emt Sits SUES eels See 3924 19 Mam Board Schematic oue xd CEN erg Du I4 X Ca pub itp Sate Monitor Board Sehemabi pss ck os cers BIDS EX da Pas WS Pu dax ew WA HON 22 Relay Board Schematic i Bu rem NOR bcm MA SIUE EINE EH SOS nen 22 Power Supply Board Schematic MEMOS E 633 0 Be aj 22 Dipolar Board Sehonmati cece ou eue eee Re px uar Romam eren Nie NR ona EX Koen 23 2 ALTEC LANSING CORPORATION a Mark IV Company Operating Instructions for Aliec Lansing 3300A Series Mixing Consoles i ELECTRICAL 1 1 115 Vac 50 60 Hz Operation The mixing console is provided with the v
18. edance Nominal Nominal before Clip o TEAT aaam Eme MONTOR pean TIC AUX SEND 1 2 oo ohne 4 dBu 1 23 20480 7 75 Phone Jack E CH INSERT 1 lines 2 dBu 8166 20 dBu 7 75 Phone Jack SUB INSERT 1 3 2 480 61 mV 20 d8u 7 75 Phone Jock TR TAPE RECORD X 08 Grom __ ___ 1 TDPT 1 Stree 1000 NOTES 1 XLR 3 type connectors are balanced CH Phone Jack are balanced R 5 GND Other Phone Jacks and RCA Pin Jocks ore unbolanced Phone Jocks unbolanced T OUT R IM 5 GND 2 330BA 8 ch 33164 16 ch IIMA 24 ch 12 ALTEC LANSING CORPORATION a Mark IV Company Operating Instructions for the Altec Lansing 3300 Series Mixing Consoles pee indlna THOM HILHA Vad HOLT NOH indind KAPEL Hol KEPD I lnalnp ng HE LHASN 4 One rg AN LN LN N x 2 0 AHH 038218 VODEE H OK OL E XM HOLIWOW DI HiB Xnw BOLT NOW HO Vd ON LEN GALT JaNNYHS I
19. f signal sources The TRIM control allows the amplification of each individual input source o be optimized Correct of the TRIM control results in best signal to noise ratio hiss the greatest dynamic range and the freedom from overload dis tortion To set the TRIM control correctly first set the channel fader minimum and cepress the channel PFL switch Make sure the source mic instrument that is plugged into the channel is used ai its nominal performance level Increase the TRIM level until the level of the PFL meter reaches 0 VU Gradually bring the channel fader up to the desired listening level This insures that nominal level is maintained throughout the input channel If the level is too low in the TRIM s gain circuit hiss will occur If the level is too hich in the TRIM circuit overload dis tortion will occur Keeping channel faders at nominal leve with proper setting of the control will keep the system sounding its best anc 5 quietest UN 4 ALTEC LANSING CORPORATION a Mark IV Company Operating Instructions for the Altec Lansing 3300A Series Mixing Consoles 2 EQ Controls Equalization can be more simply described as so phisticated tone control The EQ circuits used in the 53004 series have a substantial amount of sound shaping capability This wide range can be bonus when dealing with widely varying instrument signals poor acou
20. fuse Inc 5 MOVEABLE REAR PANEL ON THE 3308A MIXER One example of the versatility of the 3308A mixer is that it can be either rack mounted in a standard 19 inch equipment rack or mounted in a table top accommodate a rack mount installation the 3308A is supplied with its connector panel placed on its bottom This prevents the input output connectors from using up valuable vertical rack space ALTEC LANSING CORPORATION a Mark IV Company BLANK PANEL Figure 9 3308A moveable rear panel The connector panel may be moved to the rear of the mixer to accommodate a table top installation Refer to Figure 9 move connector panel to the rear When moving this panel to the rear care should be taken not to pinch any cables between the two panels 4 REAR CONNECTOR PANEL SCREW 6 LABELS In order to labe each channel without marring the surface of the mixer removable stick on labels are available from any office supply outlet Labels that are recommended are Presaply Removable Labels by Dennison part number 48 540 n dimensions are 94 1 Operating Insiructions for the Altec Lansing 3300A Series Mixing Consoles 7 SYSTEM SPECIFICATIONS Testing Conditions 120 Vrms 60 Hz line maintained Crosstalk Adjacent channel inputs 65 dB hpicol at 1 kHz Frequency Response Input output 60 dB typical 1 kHz 20 Hz
21. g monitored When the PFL circuit is engaged by depressing a PFL switch both the right meter and the headphone circuit will monitor ihe audio level of the selected channel s In the norma position all PFL switches off ihe right meter monitors the METER switched bus and the headphone circuit monitors the output of the SUB L and SUB R outputs audio level of the headphone jack is controlled by the Channei PEAK LED The channel PEAK LED monitors the input channel circuit for clipping or overload both before and after the section If it lights the signal is bordering on distortion This will be heard in the output as a harsh blaring sound on volume peaks This might be caused by excessive boost in the channel equalization controls ora TRIM control setting that is too high for the input signal Generally readjusting the TRIM control will cure this undesired condition Channel Fader The slide fader contro s the output level of the channel as it is fed to the subgroups The control should be normally set around the 0 mark nominal level At this point the signal level is high enough to keep noise from creeping in and low enough to insure plenty of headroom and ALTEC LANSING CORPORATION a Mark IV Company 5 Operating Instructions for the Altec Lansing 3300 Series Mixing Consoles f VU METERS RIGHT MONITOR PFL ly POWER LEF
22. l of the microphone input connectors Pin 1 the shield conductor provides the ground return path This will power standard condenser microphones When switched on or off the voltage will slowly ramp up or down it takes a few seconds to reach full level This prevents unwanted transients from reaching the microphone inputs When the switch is en gaged a red LED will light on the meter bridge to confirm its operation VOLTAGE SELECT Switch The 3300A series are capa e of operation at 115 or 230 Vac 50 or 60 Hz To safely accomplish a voltage change follow ihese steps 1 Turn the mixer off and completely disconnect the ac power cord 2 If the unit is used for 115 Vac 100 120 Vac opera tion be sure a 0 4 amp Slo Blo fuse is installed in the fuse holder on the connector panel If the unit is used for 230 Vac 220 240 Vac operation be sure 025 amp 10 ALTEC LANSING CORPORATION a Mark IV Company Operating Instructions for the Altec Lansing 3300A Series Mixing Consoles 5x20 supplied fuse is installed in the fuse holder 3 Change the chassis mounted switch on the connector panel to the correct corresponding voltage 4 Plug the power cord in the desired ac line and resume normal operation CAUTION Before attempting to move this switch the mixer must be turned off and the power cord disconnected Slo Blo is a registered trademark of Littel
23. master 5C MAIN Master The MAIN monaural output is the summed mix of the left and right stereo outputs The MAIN master controls the volume of the output 5D MON Monitor Master Controls the volume of the monitor output signal The monitor output is a mix of the individual channel monitor sends TAPE Land TAPE R These controls adjust the level of the tape left and tape right returns PHONES Headphone Level The PHONES gain control sets the level at the headphone jack 10 front panel on the 3324A and the 3316A top panel on the 3308A signal selected by depressing a PFL switch will be monitored through the head phone jack Without any of the PFL switches depressed the headphone circuit monitors the left and right subgroup outputs in stereo METER Assignment Switch push push switch is provided to allow the user to select the points in the circuit which are monitored by the VU meters When switch is depressed the indication will be the audio level at the MAIN and MONitor outputs the other depressed position signal level at the SUB Left and SUB Right outputs will be shown VU Meters Two B scale ana log VU meters with integral peak lights are used to indicate signal level at selected points in ihe circuit see meter assign ment switch and PFL switches The meter scale indicates a range from 20 dB to 4 dB with 0 VU 4 dBu a stand ard industry
24. oliage select switch in the 115 Vac position Its power supply design allows it to be powered from 100 Vac to 120 Vac lines in this switch posi tion 1 2 230 Vac 50 60 Hz Operation The mixing console may be powered by line voltages from 220 Vac to 240 Vac by switching the voltage select switch to the 230 Vac position How ever the ac line fuse changed Refer to Table I for proper fuse value WARNING Verify that the voltage select switch is in the desired position and ihe proper fuse is in place for the intended ac line voltage BALANCED 4 LINE EVEL Figure 1 Typical input connections must be BEFORE applying power to the mixing console 2 INSTALLATION 2 1 Hack Mounting The mixer may be placed ina standard 19 inch equipment rack It requires 17 5 inches of vertical space 10 standard EIA vertical rack spaces For more information on rack mount installation refer to Section 5 and Figure 9 of this manual 2 2 Ventilation The 3300A series mixing consoles should not be used in areas where the ambient temperature exceeds 60 C 140 F SER BALANCED HI Z BALANCED LINE INPUT DUTPUT HI Z UNBALANCED LINE INPUT UNBALANCED QUTPUT Not recommended for runs over 6 feet T Table I Fuse Selection Chart AC LINE AC LINE VOLTAGE FUSE 100 V 120 V 00 mA 250 V 8 and 16 ch 100 V 120 V 500 mA 250 V 24 ch only 220 V 240 V 250 mA 250 V 3
25. stics or other problems The EQ should be used sparingly however for the best results Too liberal use of the EQ can cause phasing problems add noise and use up a lot of ampli fier power HIGH EQ The high EQ cireuit is a shelving filter at 10 kHz with a 15 dB range It controls the treble content of the input signal Turning the control counterclockwise decreases the amount of treble clockwise increases it 2B MID EQ The mid EQ cir cuit is a peaking type filter with a 15 dB range It controls the midrange con tent of the input signal Turning the control coun terclockwise decreases the amount of midrange clock wise increases it 2C MID Frequency The mid frequency circuit controls the frequency range from 300 Hz to 5 kHz of the MID EQ control By vary ing the FREQUENCY dif ferent tonal perspectives can be created The sweep able frequency gives much more control flexibility 2D LOW EQ The low EQ cir cuit is a shelving type filter at 100 Hz with a 15 dB range It controls the bass content of the input signal Turning the control coun terclockwise decreases the amount of bass clockwise increases it MONITOR Send The monitor send control sets the level of that input signal in the monitor mix It is independent of all input channel controls except the TRIM control It is not affected by the channel EQ controls or slide fader Thus it is independent of and not affected by
26. u See specifications for details All line inputs are made through standard inch phone jacks except for TAPE inputs Several of the inputs that directly access the mix buses can be used to stack mixers together without using up an input channel The stacking group includes the AUX 1 AUX 2 and MONITOR inputs The AUX return inputs may also be used as stacking inputs For stereo subgroup stacking set the AUX 1 PAN control to L and the AUX 2 PAN control to Rand use AUX 1 and 2 RETURNS for left and right stacking respectively 1 Balanced Low Z Mic Input A female 3 pin XLR type connector is used for balanced low impedance microphones The MIC INPUT is actively ALTEC LANSING CORPORATION a Mark IV Company 1 3 AUX RETURNS 5 CAUTION WOLTAGE SELECT CAUTI ON To Atoud dia ee Hz 4 AUX IN 6 TAPE AR 2 AUX SEND 1 RECORD IHSE 5 MONITOR MAIN ASSEMBLED IN TATWAM igure 6 Rear panel input connectors balanced active balancing allows elimination of the input transformer along with its limitations while maintaining the RF and hum rejection of a good transformer coupled input It is important during operation or testing of the mixer that all faders remain fully down when ever the mic input is not pro perly terminated with a micro phone or an equivalent 150 ohm source n open
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