D:\My Stuff\BRANDS\Klark Teknik\DN1248 Mic Splitter
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1. DN1248 OPERATORS MANUAL Version 2 Klark Teknik Group Klark Teknik Building Walter Nash Road Kidderminster Worcestershire DY 11 7HJ England Tel 44 0 1562 741515 Fax 44 0 1562 745371 Email pro audio group compuserve com Website www klarkteknik com KLARE TEHNI KLARK TERNIR GROUP Walter Nash Road Kidderminster Worcestershire DY 11 7HJ England Tel 44 0 1562 741515 Fax 44 0 1562 745371 Company Registration No 2414018 KLARK 3 00 DDA MBAS SIGNAL PROCESSING BY DEFINITION BETTER BY DESIGN DESIGNED FOR A PURE PERFORMANCE DECLARATION OF CONFORMITY We Klark Teknik Group UK Pic of Klark Teknik Building Walter Nash Road Kidderminster Worcestershire DY11 7HJ Declare that a sample of the following product Product Type Number Product Description Nominal Voltage s Current Freq DN1248 115V AC 130mA 50 60Hz 230V AC 260mA to which this declaration refers is in conformity with the following directives and or standards Directive s Test Standard s Generic Standard Using EN55103 Limits and Methods EN50081 1 Class B Conducted Emissions Pavi EN55103 CLass B Radiated Emissions Pavi EN55103 Fast Transient Bursts at 2Kv EN61000 4 4 Static Discharge at 4Kv EN61000 4 2 Electrical Stress Test EN60204 Date 10th December 1999 Authority Technical Director Klark Teknik Group UK Plc Attentio2. o Rb cc Wa e A A O G NSd jdeoop pnw sonep siy z GC w r SVUS1SJISJUI NJP y SSNDO Jou ADUJ SD1ASP siul 1 O L NSd SUOIIIDUOS O A DUIMOJJOJ SU ol JOSIqns s UONDIS JO seny DOJ AU JO S od UHA SSIAWOS SDIASP SIUL en o A3INIOISNVAL gt ofS Y INO iu 87 LNG Rear Panel Blanking Plate and User Multipole Connections The rear panel has a removable blanking plate which 1s designed for users to fit their choice of multipole connectors The circuit board for each for the twelve channels has a row of spring leaf terminals along its rear edge to allow users to terminate cables from the mutipole connectors The top cover should be removed from the unit to gain access to the blanking plate and the circuit board terminals Please ensure that all screws are retained and used to re attach the cover and blanking plate Any warranty claims resulting from damage to the unit will be void if all of the screws are not used to re secure both the cover and the blanking plate The input and all four outputs are brought out to the circuit board terminals to make a connection insert a small flat bladed screwdriver into the upper rectangular slot and using a levering motion move the screwdriver away from the circuit board this action will open the contacts in the lower opening in the connector so that the bare ends ofa wire can be inserted Moving the screwdriver In the other direction will close the contacts which will then
3. hold the wire securely Any warranty claims will be void ifthe damage has been caused by excessive force to these multipole connectors lt 1s recommended that screened twisted pair cable is used to make the connections between the individual circuit boards and the multipole connectors Insert flat bladed screw driver Me here to open multipole Cold xiRpin3s M L Hot XLR pin 2 L Ground XLR pin 1 Cold xtrpins N L Hot XLR pin 2 I Ground XLR pin 1 l Cold XLR pin3 I Hot XLR pin 2 l Ground XLR pin 1 L Cold XLR pin 3 L Hot XLR pin 2 lt i Ground XLR pin 1 L Cold XLR pin 3 St l Hot XLR pin 2 I Ground XLR pin 1 Mic Channel PHANTOM GAIN agv L p gt OUT 1 p PAD gt ELECTRONIC INPUT 1548 gt MIC AMP py oso E gt OUT 2 TRANSFORMER ke OUT 3 CLIP LO ur TRANSFORMER 1 OF 12 ONLY SHOWN ses Se kJ JT OO O3 s 99 O Q15 L Ca O Oz SOLO SECTION O sic PHONES SOLO OUTPUT The mic input is based around the same circuitry as used m the Midas Heritage live sound console and features exceptionally low noise and distortion combined with a generous level of headroom The mic preamp gain may be adjusted by using the 15dB pad and 30dB boost switches either singly or in combination With neither selected the signal path is unity gain The gain range Is adequate to accommodat
4. provide isolated feeds from the group outputs ofthe FOH live sound console mu mos Mss m s moss os EN DL It es EDO Eu Em EO EZ zm EZ EO m EZ m EX m m mm m mm KU E eeeeeeeeee e eeeeeeeeee dmmoj mi ee ee ee ee EO 8 he kuii frt loa le o A Ee I iS 900000000000 MOUK 12 Appendices Architect s and Engineer s Specification The Mic Splitter shall provide 12 discrete audio channels in a standard 3U 19 rack mount chassis Each channel shall have a microphone preamplifier two transformer isolated outputs and two electronically balanced outputs with two paralleled connectors Both transformer isolated outputs and one electronically balanced output will be mounted on the front panel the remaining electronically balanced output will be mounted on the back panel Each channel shall also provide separate 30dB boost and 15 dB pad switches switchable 48V phantom power an earth lift function and a soloing facility The Mic Splitter shall have a headphone amp to allow the monitoring of soloed audio channels The headphone amplifier shall have a 1 4 inch jack socket for the headphones a rotary level control for the headphones output and a seven segment LED bargraph for monitoring the soloed signal level Each Mic Splitter shall meet or exceed the following performance specifications Electronically Balanced Outputs Distortion lt
5. should be switched off for any channel being used with a dynamic microphone or passive DI box though no problems should arise if the phantom power is inadvertently left switched on providing the sources are wired for balanced operation and connected using conventionally wired balanced cables Under no circumstances should phantom power be applied to any unbalanced input source PHONES LEVEL PHONES Use the solo facility to check the level of each input individually and set the gaim and pad buttons to achieve the highest possible signal level without the clip LED illuminating Leave sufficient headroom to allow for unplanned increases in level during performance Both the transformer balanced and electronically balanced outputs offer exceptional audio quality combined with excellent line driving capability However the transformer outputs may be preferred in situations where absolute electrical isolation must be maintained such as running feeds to mobile studios or outside broadcast facilities In theory the electronically balanced outputs remove any opportunity for the audio transformers to colour the sound but in practice the sonic quality of the two types of outputs 1s very similar OLT 2 TRANSFORMER OUT 1 ELECTRONIC O O OUT 3 TRANSFORMER Out 3 Transformer balanced XLR output Out 2 Transformer balanced XLR output OUT 2 TRANSFORMER O OUT 1 ELECTRONIC INPUT Out 1 Electronically b
6. 0 01 1kHz a 4dBu Frequency response 0 0 5dB 20Hz to 20 kHz Transformer Balanced Outputs Distortion lt 0 01 1kHz a 4dBu Frequency response 0 1 0dB 20Hz to 20kHz The audio connections for each of the twelve audio channels shall be via 3 pin XLR style connectors one female connector for the input and four male connectors for the outputs The unit shall be capable of operating from a 90 to 250V 50 to 60Hz AC power source The unit should have the option of dual redundant power supplies The Mic Splitter shall be the Klark Teknik model DN 1248 and no alternative option 1s available 13 Specifications Inputs Input impedance CMRR Equivalent input noise Connectors S1gnal present level S1gnal clip level Outputs Electronically balanced Source impedance Min Load Max level Connectors Transformer balanced amp isolated Source impedance Min Load Max level Connectors Performance Electronically balanced Frequency response Distortion Transformer balanced amp isolated Frequency response Distortion Power Requirements 90 to 250V a c 50 60Hz lt 75VA 3 pin IEC connector Dimensions Width Height Depth Weights Nett Shipping gt 2kQ gt 100dB a 100Hz to 10kHz lt 100dBu unity gain 3 pin male XLR gt 25dBu gt 21dBu 500 6000 21dBu 1kHz 3 pin female XLR 700 6000 3dB level loss into 20002 18dBu 1kHz 3 pin female XLR 0 0 5dB 2
7. 0Hz to 20kHz lt 0 01 IkHz 4dB 0 3 0dB 20Hz to 20kHz lt 0 05 IkHz 4dB 483 mm 19 inches 132 mm 5 2 inches 300 mm 12 inches 7 4 kg 8 4 kg 14 Klark Teknik reserve the right to alter these specifications without prior notice Schematic Drawings DN1248 Mic Splitter Headphones Mic Splitter Channel Schematic 1 Mic Splitter Channel Schematic 2 Mic Splitter Channel Schematic 3 HIS ell and ABQWNN JUSWn230 1 neeg voo1 fl voord vil S va s227 2 J q 1314AVWW JHL siu EHE A3L1xX 01240 ee 2 Azal d 0 3NDHAJOVAJH Ayr AND Emi vado I 5100 5 12esvd 2 SV T i sia MEUS I Sat Sr gra veal beier AND A AND A E 8 ld en AND LNAS AAJ DIS 8 197 HOJ apL2 eo 12 Sya 00 oor 001 3 Tam ap jZ 023 219 AND A aps I a z EHE SESSIN lea 8 I II gp6 Z gene ape apo N AND aP J WODA YIH J A ALVIIGNI SG31 Sta ALI SIW AND Sid T 3022 za 0 1722 ap aa j 2 a Mar IA sl AJNDHAUVAH sed 21 ny 2 I glij ova es GND A ugo e y 197 aoz 9 la 8 Iw AJe ea3j Ja J 2 AGe2no22 e ano 3 g Asanoaa 2 ed J Aizal e J Sla e qvyO1 AS 3SV3A4INI OL WNO IL d S J r la GND T AN AN 2 J g Sl la p ja TOPSN UND UND uoo BE d IT eo OND A Asenoz2 al Asenozz 2 e OND UND AG2 022 g Asceno22 e Aizal W IN e EHE 6 lal I e sim 0137 cu nl J 12 HOSJ 102 J zea ke su GND J oxexa UJU VIH Ir 9S
8. Ost amp 30v3H er 9S J Ost UTA VIH er 9S 0x u30ya3H pr uSADd Ny J 0x2 Ya y 3H OND A er OND OND xi el 0837 1837 OJ 8 9 p e TANVd Avid UND nD NI OWS J 0x aadyvaH or TANVd ayaa OND OL LONO DIOS I 0xE udaya vec R48 20k vec 1 2 3 l R49 20k ek BC856B e 1 1 R50 R54 10k 220R a 2 2 SOLOLED CLIP V GND P18V lci7 _i cis BAS32 4093B 52n2 5100n C40 3 100u SOLO CLR ji GND GND GND 100 100p 8 Ja 2 U2B di pbsan aup 7 GND MIS cm EP ee ao LIT R52 470R 4 HEADER 5x2 1 e 1 _c22 GND caj R51 Pen un 5 100u 10k Vac e GND M1 8V C14 dn aR 1 1 CONNECTS TO o Sa SWITCH PCB P18v 220R 220R 23 VCC P18V e R 3 me o l c43 HEADER 6x0 1 aby D n DN 1 BC856B 2 R53 GND 10k GND 2 V RI 5 GND 2k2 mf Lc7 3k3 nf 470p EAN J4 PLA NC3MBH Beem DND FMMT5087 FMMT5087 R20 2k2 mf KTMO2 SCH J7 O Ah be HEADER 3x0 1 V REAR PANEL FGD GRID XI TEK THE MAYFIELD 1 e 2 1 2 ul A D1 D2 l BAS32 passe 4NE5532 1 1 1 D5 D6 R24 e e 10k cas BAS32 BAS32 KT MIC SPLI TTER CHANNEL SCHEMATIC Si ze Document Number REV L00n V V c KTMI 2 SCH 2 GND MI 8V GND GND MI 8V 7 of 3 Le 3 Do te October 28 1999 Sheet JJ IZI OG I 5 o I 6 y Ti tte 5532 R63 47R 470u e a Q9 FMMT591 V
9. RS FGND 63M 5k 1 3 FL4 V DS306 1n GND 1 3 470u e V FGND cd l 2 KTZA 1 1 2 R56 1k 2 R100 47R 1 2 l ces R100A NF p47n Us IlI eL 1 2 lt U3B gt Y V R99 47R GND GND 1 2 EAS 1 R58 Te 1k l AZEZAZE 2 8 1 Ge Se ces R98 47R e d L 1 2 HESE GEN e 1 F as D15 1 rhe F MMT 491 2 BAS32 e 3 V V FL3 1 2 2 U7A 1 2 ces GND GND DS306 1n REE tor l 1 12 1 2 1 3 1 ES REA SER lt ulA gt iu NE 2 2 2 e VR4 63M 5k 1 3 n R91 GND GND 20k pisv Y e 1 DI 4 2 BAS32 FLE C38 DS306 1n 21 1 2 1 3 1 RIE VIER LAB 470u 2 lt FGD gt GRID XI TEK THE MAYFI ELD USK NPS BT UK KT MIC SPLI TTER CHANNEL SCHEMATIC Si ze Document Number REV C KTMO2 SCH e Date October 14 1999 Sheet 2 of 3 C 7 e o 41 f a C3 00p P18v P18v P18v e K Q12 1 1 Pa FMMT 491 D1 3 2 uu 2 BAS32 FLS DS306 1n KIN gt 1 3 ZAJ 8 Laj 1 DO E A j j C j SO j A HOS 2SWLA a ASQAUNN FUSWNIOG AZ IS 3 ILVWN3JHIS T3NNVH3 ALL ITIAS DIN LA 2 12 LL An 141 SAN ASN aqa IJAVW 3HL A31 IX 0 Lat A8v das cal Ms du rNdS EMS AYLIN3 WOLLDE 0x2gx9 Na par 1317 daA rNdS IMS anos a WNON PNAIS SAS
10. ach Solo button has an integral status LED and features a dual mode of operation When pressed briefly the solo function will latchon electronically whereas 1f the button is pressed and held the solo 1s active only for as long as the button is held down A channel which has electronically latched can be cleared by briefly pressing in the same manner The electronic latching function allows multiple channels to be switched onto the Solo bus The Solo bus external linking facility allows solo d channels to be monitored using the headphone amp on any of the connected units Note The Solo bus bargraph on each connected unit only displays the signal level for that unit which has the advantage of making it easier to isolate level or connection problems Multiple units are connected Solo Out to Solo In as shown left Applications In a live recording situation the DN1248 may be used either to split the stage mic signals at source or to take feeds from the group outputs of a live sound console It is also able to accommodate feeds from backline preamp outputs active instruments keyboards and so on Because there are four outputs per channel it is possible to interpose the unit between an instrument and its backline amplification while still providing up to three feeds for mixing monitoring or recording A number of examples are illustrated below Example I Shows an outside broadcast application where the DN 1248 supplies feeds to bot
11. alanced XLR output Input Balanced XLR for microphone level signals Out 4 See rear panel Note If either of the transformer balanced outputs 2 and 3 is shorted out the signal level on the other output may be adversely affected The electronically balanced outputs 1 and 4 will remain unaffected gt afe d Signal Present LED Green An input signal in excess of 25dBu will cause the signal present LED to illuminate Signal Clip LED Red An input signal in excess of 21dBu will cause the signal Clip LED to illuminate The Clip LED 1lluminates approximately 0 5dB below the actual clip level Solo Pressing the electronically latching Solo button permits any channel to be monitored 1n isolation via the headphone socket on the front of the unit Each Solo button has an integral status LED and features a dual mode of operation When pressed briefly the solo function will latch on electronically whereas if the button 1s pressed and held the solo is active only for as long as the button 1s held down Pressing the button again will exit solo mode Multiple channels may be solo d When multiple units are linked the solo system permits phones monitoring from any of the linked units 48V Applies 48 voltphantom powerto the channel s microphone input 30dB Switches in 30dB of mic pre amp gain 15dB Switches in a 15dB attenuator pad Note that both switches may be used together when a gain of 15dB is required L
12. cupies 3U of rack space Avoid mounting the unit directly above or below power amplifiers or power supplies that radiate excessive magnetic fields or heat Ensure that the ventilation apertures on either side of the unit are not blocked or obstructed This unit must be earthed If ground loop problems are encountered the ground lift switches on the microphone inputs may be used It is also permissible to disconnect the cable screen at one end or other of the output cables though the signal input cable screen must be connected at both ends to ensure the phantom powering operates correctly The mains fuse should be rated TO 5L250V Outputs and 4 are electronically balanced on conventionally wired XLRs pin 1 screen pin 2 hot and pin 3 return with a nominal operating level of 4dBu and a maximum output capability of 21dBu Transformer coupled outputs 2 and 3 have a maximum signal capability of 18dB For unbalanced use pin 3 of any output XLR may be grounded at the destination end of the cable The source impedance of the electronically balanced outputs is 5002 while the transformer balanced outputs have a source impedance of 7002 Both are designed to feed a minimum load of 60002 Basic Operation Connect all capacitor microphones and DI boxes to the DN 1248 before applying phantom power Ensure that the ZOO US sound system level is turned down at this stage to prevent AMA switch on thumps or acoustic feedback The phantom power
13. e most microphones keyboards DI boxes backline preamp outputs and active guitar basses Passive guitars require a high impedance load and should be connected via a suitable active DI box such as the Klark Teknik LBB100 or DN 1414 Headphone Amp Illuminated Logo The DN 1248 has no mains power switch When power Is connected the logo at the front right of the panel will 1lluminate Phones Level Sets the level of the headphone output used for Solo monitoring Meter Seven segment LED meter monitors the level of any soloed signal in the range 40 Sig to OdB The metering may be used in conjunction with the input gain switches and the solo buttons to optimise the input gain settings Phones Standard quarter inch TRS jack to accept conventionally wired stereo headphones Any soloed channel or channels will appear atthe headphone output under control ofthe Phones Volume control DNI 248 va ri Bet e e e e e iun is a L oe ee o I pie ew eww e e e e E e E E E e E E em IN E AAA a E Ge ce su L e e o D L 00 O e ee e e DN 248 0000000 LA e e a e e LAN My PHONES LEVEL o E 659 15 21 O 27 sic PHONES DN1248 MICROPHONE SPLITTER E RLARR 3 11 Solo Bus Operation Pressing the electronically latching Solo button permits any channel to be monitored In isolation via the headphone socket on the front of the unit E
14. h the FOH live sound console and a monitor console as well as to two outside broadcast recording trucks Normally the transformer balanced outputs 2 and 3 would be used to feed the OB trucks OO E Ri NOS A EE AN Sek ote ee te p TE v din R EEE oi RENNEN ENT 7 eet Rx Seng SC ege FT see wii Ee de grasan 8 wein 3 6 7 8 10 1 12 ee E KEN 1 v Y mit uw wna a En mi mn EZ zn El z mn Em mn zm Me xu z mz m z m En ee t ETKA gt gt gt gt gt gt gt gt e eeeeeeeeee gt 6 6 gt 6 gt SER ER IK KK KK KK IKK gt EN D 00 OOOPOOOOOOO APA Example 2 Shows a simple live recording situation where the stage mic feeds are split to serve the FOH live sound console a monitor console and an on site recording console It 1s recommended that one of the transformer balanced outputs 1s used to feed the recording console especially 1f the grounding scheme 1s outside the control ofthe PA operator REEL UU Ee SOS are sc ef AA gt tta im jaj maa go SEN Lj AA E ge a LUNON kn Y SARE EEE EE Eee ee Pe OOOO SSO O5 OS AAA ab Ah Ab Ab ab ab ab ae o0 GO PPEPPEPPEELEEI O OOOEOEGOOEOGEOOOO UT si sek SNO EEE Jean Cual seksa mmm p FATI 3 Add Example 3 Shows a live recording application where the DN 1248 is used to
15. ift Isolates the input signal ground Note Switching in the ground lift disables phantom power operation The Lift switch has an integral red status LED nN O mO MD VW O 2222335 2 SFR o 472 28 a O O n2 535370 Sse ESO O S E o pe O O e H lt E a O O do S 5 ne a Sek oo E E 8 2 Zo gt 39 E 2658308 S Z S o o 3 x a go orgs Yn n E Sos oe E O x 5 E Faucets DS e o e Sun BO 0 2 Y 0 OE vi O O OO N LU Dim gt Qu Sn gt 3 So ce o E Su oi 5 3 2 25 N e Gro S E o o S v oe 233838850 2 2 S gt IS e 5 ga cas L JO S S o 3 i a 38 gE Os Zoo EK a Y E GG a H ong BE o EES ERE as G on a Bo S VE Ga 08 Mote oe a SE NS 3 238 23 5 oo ou SS O Go 83 a OA AESDAERS so 1INNOS43d 11495 OL ONIDIA JS 93439 3QISNI SLAYd TIIVIDIAA3S AISN ON JUGIANNHI Y IN URANO Svd IN HIelv 39 ISNIA 3ONVI 1ddV SIHL AOSCIS 0 1 3SNI INOW OOHO 39 anos Dale and Y1 V UISOJXA Svd IN NOI IN LIV IES FSIS EGOS EERE DEAE YAO9 ZHO9 0S DV y AOD ACHEN ION OGXOOHS 31815n4 NN dvd 1391438 NOLIN LIV AOVC 00L 3SOdX3 LON OA XOOHS TYI UO 918419313 dO ASIA HL 39N038 OL rasnd 40 ANTWA ANY 3dAL SINS HLIM JOVIdIAU JSYNOA AldANS 291 JO ASIA IHL JONAJA OL NOLLNYD ONINIVA Jald JO ASIA IONGI O NOIINWD O uolipiedo palisepun asnbo Apu IDUJ S9U818J18JUI DUIPN DUI pSAISOSDI SOUSIP OU AUD g
16. ltage range required for satisfactory operation of the unit Before connecting this unit to the mains supply ensure the fuse fitted is the correct type and rating is as indicated on the rear panel adjacent to the fuse holder Safety Warning This unit is fitted with 3 pin power socket For safety reasons the earth lead should not be disconnected Signal ground is referenced internally to chassis via a resistor capacitor network which provides earth loop immunity To prevent shock or fire hazard do not expose the unit to rain or moisture To avoid electrical shock do not remove covers Refer servicing to qualified personnel only Attention Cables This product should only be used with high quality screened twisted pair audio cables terminated with metal bodied 3 pin XLR connectors The cable should be connected to pin 1 Any other cable type or configuration for the audio signals may result In degraded performance due to electromagnetic interference Electric Fields Should this product be used in an electromagnetic field that 1s amplitude modulated by an audio frequency signal 20Hz to 20kHz the signal to noise ratio may be degraded Degradation of up to 60dB at a frequency corresponding to the modulation signal may be experienced under extreme conditions 3 V m 90 modulation After You Have Unpacked The Unit Save all the packing materials they will prove valuable should 1t become necessary to transport or ship this produc
17. n Where applicable the attention of the specifier purchaser installer or user is drawn to special limitations of use which must be observed when these products are taken into service to maintain compliance with the above directives Details of these special measures and limitations to use are available on request and are available in product manuals A Subsidiary of Telex communications Inc Contents Thank you for using a Klark Teknik product After you have unpacked Introduction Installation and Connection Basic operation Rear panel blanking plate and user mutliple connector Mic channel Headphone amp Applications Appendices Specifications Schematics Page 1 Page 2 Page 3 Page 4 Page 5 Page 8 Page 9 Page 10 Page 12 Page 13 Page 14 Thank You For Using This Klark Teknik Product To obtaim maximum performance from this precision electronic product please study these instructions carefully Installation and operating the mic splitter 1s not complicated but the flexibility provided by its operating features merits familiarisation with its controls and connections This unit has been prepared to comply with the power supply requirements that exist in your location Precautions Do not install this unit in a location subjected to excessive heat dust or mechanical vibration Voltage Selection and Power Connection Connection 1s made by means of an IEC standard power socket The rear panel text indicates the vo
18. t Please inspect this unit carefully for any signs of damage incurred during transportation It has undergone stringent quality control inspection and tests prior to packing and left the factory in perfect condition If however the unit shows any signs of damage notify the transportation company without delay Only you the consignee may institute a claim against the carrier for damage during transportation If necessary contact your supplier or as a last resort your Klark Teknik importing agent who will fully co operate under such circumstances o eeeeee oeeeeeeoeeeePelP MM 4 Y oeeeeeeeeeeuvebelaso BLARK TT Introduction The DN 1248 active microphone splitter brings the legendary sound and reliability of Klark Teknik to this application for the first time Housed in a rugged 3U rack enclosure the DN1248 offers a cost and space effective method of providing up to forty eight outputs from twelve sources Key Features e Midas Heritage Mic pre amp e Inter unit linkable headphone bus with individual and multiple solo feature e 15dB pad 30dB boost earth lift and phantom power switches on all channels e Internal power supply with factory option of backup PSU e Five year international factory warranty The Klark Teknik DN1248 is an extremely high performance 12 channel active mic splitter housed 1n a 3U rack mounting case with an integral switch mode power supply
19. that can automatically adapt to mains voltages in the range 100 to 240 Volts 50 to 60Hz A dual PSU is available as a factory fitted option Applications include splitting on stage mic and DI box feeds to service monitor and FOH consoles as well as to facilitate the multitrack recording or broadcasting of live events Each microphone input feeds a superbly specified mic preamp based on the circuitry used in the acclaimed MIDAS Heritage live sound console There are four balanced outputs per channel two transformer isolated and two electronically balanced All the audio connections are on balanced XLRs wired pin 2 hot featuring gold plated connectors The mic input and three of the four outputs two transformer and one electronically balanced are mounted on the front panel for easy access The remaining output electronically balanced 1s located on the rear panel Signal Present and Clip LEDs are provided for each channel and a solo system allows any channel or combination of channels to be monitored via the integral headphone amplifier Two gain switches 30dB and 15dB may be used individually or in combination to optimise the preamplifier gain Standard 48 volt phantom powering 1s individually switchable on each channel Each mic input is also fitted with a ground lift switch WARNING 48V phantom disabled if ground lift switch selected Installation And Connection The Klark Teknik DN 1248 is designed for standard 19 rack mounting and oc
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