Instruction/ maintenance manual of the product X 20R Crest Audio
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Owner’ s Manual X-Series ™ Rack Mount Mix ers X 18R ™ / X 20R ™.
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1 Sav e the carton and packing mate - rials! Should you ever need t o ship the unit, use only the original factor y packi ng. For replacement packaging, cal l Crest Audio’ s Customer Ser vice Depar tment directly. 2 Read all documentation befor e operating your equipment.
Intended to aler t the user to the presence of uninsulated “dangerous voltage” within the product’ s enclosure that may be of sufficient magnitude to constitute a r isk of electr ic shock to persons.
Impor tant Safety Instructions W ARNING: When using electr ical products, basic cautions should alwa ys be follow ed, including the following: 1. Read these instr uctions. 2. K eep these instr uctions. 3. Heed all war nings. 4. F ollow all instructions.
Wichtige Sicherheitshinweise ACHTUNG: Beim Einsatz von Elektrogeräten müssen u.a. grundlegende V orsichtsmaßnahmen befolgt werden: 1. Lesen Sie sich diese Anweisungen durch. 2. Bew ahren Sie diese Anweisungen auf. 3. Beachten Sie alle Warnungen. 4.
Instructions Impor tantes De Securite A TTENTION: L ’utilisation de tout appareil électr ique doit être soumise aux precautions d’usage incluant: 1. Lire ces instr uctions. 2. Gardez ce manuel pour de futures références . 3. Prétez attention aux messages de précautions de ce manuel.
Instrucciones Impor tantes P ara Su Seguridad CUIDADO: Cuando use productos electrónicos, debe tomar precauciones básicas, incluyendo las siguientes: 1. Lea estas instr ucciones. 2. Guarde estas instr ucciones. 3. Haga caso de todos los consejos. 4.
4 1 2 3 Master Section P .32 Aux masters, groups, main outs, monitor section. Front panel controls and rear panel connectors. Stereo Input Channels P .
X 18R ™ / X 20R ™ Owner’ s Manual p. 10 X 18R/20R Block Diagram.
How T o Use This Manual Format T h is ma nu al us es a f orm at th a t i s i nt en de d t o b e e a sy to re ad , ye t t e c h n ic al en ou gh f o r t ho se w h o n ee d t o k no w a ll th e d et ai ls .
Mono Input Channel 1 X 18R ™ / X 20R ™ Owner’ s Manual Module Block Diagram Controls p. 12.
Fr ont Panel Features Mono Input channel features are identical for both the X 18R and the X 20R. The X 18R has 14 Mono inputs and the X 20R has 12 Mono inputs. Line Input (Mic Pad) With this switch in the UP position, the input preamp circuit is set up to accept a m ic -l e v el s i gn al .
Mono Input Channel 1 p. 14 X 18R ™ / X 20R ™ Owner’ s Manual Module Block Diagram Controls.
Front Panel Features Equalizer (EQ) M an y a ud i o s ig n a ls co m i ng in t o th e c o ns ol e r e qu ir e s o me de g r e e o f c o r r ec t i v e EQ in o r d er to be par t of a good-sounding mix. The X 18R & X 20R offer a ver y useful and great-sound - ing EQ section on each channel.
p. 16 Mono Input Channel 1 X 18R ™ / X 20R ™ Owner’ s Manual Module Block Diagram Controls.
AUX Send Features Six auxiliar y Sends are a vailable for creating individual output mixes. These can be used to drive effects processors, pro vide monitor mixes, create broadcast or alternate sound reinfor cement mix es, or for other special requir ements.
p. 18 Mono Input Channel 1 X 18R ™ / X 20R ™ Owner’ s Manual Module Controls Block Diagram.
Bus Assignment Featur es T he bu s a ss ig n me nt s e ct io n o ff e r s c on s id er ab l e f le x i bi li t y fo r cr ea ti n g w ha t e v en t ua ll y b ec om e s th e m a i n o ut p ut mi x . T w o s te r eo s u bg r ou p s ar e a v ai la b le f o r c r ea t i ng su b m ix es o r separate stereo mixes.
Mono Input Channel 1 X 18R ™ / X 20R ™ Owner’ s Manual Rear Panel Block Diagram Connectors p. 20.
Mono Input Channel 1 Rear Panel Features 48 V P hantom P o wer + 48 v ol t s DC is a pp l i ed eq u al l y (t hr u c ur r e n t- li m i ti ng r e s is to r s ) t o b o t h p in s 2 a nd 3 on the mic-input XLR connector .
Stereo Input Channel 1 p. 22 X 18R ™ / X 20R ™ Owner’ s Manual Module Block Diagram Controls.
Fr ont Panel Features The Stereo Input channel features are ver y similar to the Mono Input channels. The X 18R has 2 Stereo inputs, and the X 20R has and 4 Stereo inputs. On both models, the Stereo inputs are l oc a te d t o t he le f t o f t h e m as t e r section, and to the right of the Mono inputs.
Stereo Input Channel 1 p. 24 X 18R ™ / X 20R ™ Owner’ s Manual Module Block Diagram Controls.
Fr ont Panel Features Ster eo EQ The Stereo Input channel has two parallel EQ circuits that are controlled by the same set of knobs. High Fr equency — HF Boost / Cut 15 dB boost and cut. Shelving @ 12 kHz. High Mid— HM Fr equency Continuously sweepable between 400 Hz and 8 kHz.
Stereo Input Channel 2 X 18R ™ / X 20R ™ Owner’ s Manual Module Block Diagram Controls p. 26.
AUX Send Features Six auxiliar y sends are a vailable for creating individual output mixes. These can be used to drive effects processors, provide monitor mixes, create broadcast or alternate sound rein - for cement mixes, or for other special requir ements.
Stereo Input Channel 2 X 18R ™ / X 20R ™ Owner’ s Manual Module Block Diagram Controls p. 28.
Bus Assignment Features The bus assignment section offers considerable flexibility for creating what eventually becomes the main output mix. T w o stereo subgroups are available for creating submixes or separate stereo mix es.
Stereo Input Channel 2 X 18R ™ / X 20R ™ Owner’ s Manual Rear Panel Block Diagram p. 30.
Stereo Input Channel 2 Rear Panel Features +48 V On +48 volts DC is applied equally (thru current-limiting resistors) to pins 2 and 3 on both the L & R mic-input XLR connectors.
Master Section 3 X 18R ™ / X 20R ™ Owner’ s Manual Module Block Diagram Controls p. 32.
Master Section 3 Fr ont Panel Features The X 18R & X 20R ha ve a comprehensiv e output section, including meters, master level controls and a flexible group assignment section. Headphone Control Section In normal use , the headphones are used to monitor the Solo system.
Master Section 3 X 18R ™ / X 20R ™ Owner’ s Manual Module Controls Block Diagram p. 34.
Fr ont Panel Features 12 V Lamp Jack A T N C ja c k is a v ai la b l e f o r a tt a c hi ng a g oo s e- ne c k la mp . T he ce n te r c o n ne ct i o n i s 1 2 V olts DC and the outer connection is ground. A medium or high-intensity incandescent or LED 12V DC Littlite can be used.
Master Section 3 X 18R ™ / X 20R ™ Owner’ s Manual Module Block Diagram Controls p. 36.
Fr ont Panel Features AUX OUT 1-2 Lev el Control This is the master stereo output lev el control for the AUX 1/2 pair . Aux 1-2 AFL This button assigns the AUX 1/2 stereo pair to the solo system. Since it is AFL, the signal is monitored after the AUX insert and master lev el contr ol.
Master section 3 X 18R ™ / X 20R ™ Owner’ s Manual Module Block Diagram Controls p. 38.
Fr ont Panel Features GROUP Assignment Section T he X 1 8 R a nd X 20 R o f f er a fl ex i b le gr o u p a ss i g nm en t a rr a ng em e n t. E a ch of t he f ou r Gr oups can be directly assigned to Left, Right and Mono buses, in any combination.
Master Section 3 X 18R ™ / X 20R ™ Owner’ s Manual Block Diagram Controls p. 40.
Front Panel Featur es MONIT OR Output Section T he X 1 8 R a nd X 20 R o f f er a n e xt e n si v e m o n it or i n g s ys t e m w hi c h ca n b e us ed f or s e v er a l alternate mix and remote listening purposes. The main L/R & M mixes, the Groups, Auxes 1&2, the T ape IN, and the Solo system can all be routed to the Monitor outs.
Master Section 3 X 18R ™ / X 20R ™ Owner’ s Manual Block Diagram Controls Module p. 42.
Fr ont Panel Features MONIT OR Output Section SOURCE SELECT T he So u r ce se l e ct po rt io n o f t he M on it o r sy st e m al lo ws y ou t o a ss i g n t he p ri ma ry m ix buses to the Monitor outputs. NO TE: All buses are monitored pre-fader (post-inser t) NO TE: All selected sources are added (summed) together .
Master Section 3 X 18R ™ / X 20R ™ Owner’ s Manual p. 44 Block Diagram Controls Module.
Fr ont Panel Features Mono PK/SIG LED Green/Red - Flashes to indicate the Mono master level. Green during normal oper - ation and red to indicate ov erload either at the mix amp or at the fader . Left/Right PK/SIG LED Green/Red - Flashes to indicate the summed Left/Right master levels.
Master Section 3 X 18R ™ / X 20R ™ Owner’ s Manual Block Diagram- Groups Main Outputs Bus Inputs Block Diagram- Main Mix Buses p. 46.
Master Section 3 Rear Panel Features Left, Right and Mono Bus Inputs These three female XLRs are used to bring external signals directly into the Left, Right and Mono mix buses. Useful for linking multiple mix ers together or to introduce addi - tional signals into the main mix.
Master Section 3 X 18R ™ / X 20R ™ Owner’ s Manual Rear Panel Block Diagram p. 48.
Master Section 3 Rear Panel Features Aux Insert 1 Thru 6 This switching 1/4” TRS jack allows an external processor or EQ to be inser ted into the si gn al p ath of t he Au x ci r cui t. 1/3 Oct a v e EQ s or f ee db ac k su pp re ss or s ar e co mmo nl y used here if the Aux send is used for on stage monitors.
Master Section 3 X 18R ™ / X 20R ™ Owner’ s Manual A C Inlet Information And W arnings Solo Link Connectors Tie Mix ers T og ether Block Diagram- T ape Input Block Diagram- Alt And Monitor Output p.
Master Section 3 Rear Panel Features T ape (Line) In The Left and Right T ape inputs are available as both 1/4” TRS and RC A jacks. Both sets of inputs can be used simultaneously , (the signals will add together). The TRS jacks are balanced, +4 dBu inputs and the RC A jacks are unbalanced -10 dBV inputs.
Connector Pinouts Le vels And Info Connector Pinouts Main P anel p. 52 Specifications 4 X 18R ™ / X 20R ™ Owner’ s Manual.
Specifications 4 Specifications Fr equency Response +0/-1 dB 20Hz-20kHz ref 1 kHz (an y input to any output) THD an y output < 0.01% THD 20 Hz - 20kHz@ +15 dBu out Noise mic ein: better than –128.
User Notes 5 X 18R ™ / X 20R ™ Owner’ s Manual p. 54.
User Notes 5 p. 55.
X 18R ™ / X 20R ™ Owner’ s Manual V ersion 1.0 August 2008 Crest P/N 31700059 Crest Audio 5022 Hwy . 493 North Meridian, MS 39305 www .crestaudio.
An important point after buying a device Crest Audio X 20R (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Crest Audio X 20R yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Crest Audio X 20R - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Crest Audio X 20R you will learn all the available features of the product, as well as information on its operation. The information that you get Crest Audio X 20R will certainly help you make a decision on the purchase.
If you already are a holder of Crest Audio X 20R, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Crest Audio X 20R.
However, one of the most important roles played by the user manual is to help in solving problems with Crest Audio X 20R. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Crest Audio X 20R along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
