Rolls RP252 User's Manual
Contents
1. OPERATION CONT Raising the Signal Out of a Mix Since reducing dynamic range can increase the average signal level and meter readings a single track can be brought up out of a mix by boosting its level slightly and applying compression Set the Threshold for 4 dB to 6 dB of compression Preventing Sound System Overload Limiting Applications where an abolute maximum signal level must be set to avoid distor tion or speaker damage set the RP252 for Limiting Limiting has been defined as a signal to compression ratio of 10 1 or more Start with the Ratio at infinity 1 use a fast Attack and set the Threshold at 15 dB of compression or just a few dB below the clipping point of the sound system At low levels the RP252 won t do anything but at higher levels the peaks will be limited to the Threshold point Often it is recommended the compressor limiter be inserted just before the power amp some systems even have a separate compressor limiter on each output of the crossover INTRODUCTION Thank you for choosing the ROLLS RP252 Compressor Limiter Gate We recom mend you take a moment and read through this manual as it provides information that will assist you in using your unit t2. k a ree TPO a eee 23 da le _ NIVHO Jas ngl EEN ea ouve 001 yyly ni moge A A001 1ada or i WI x VISNE ax van Bid cate josh tld Sh E E sez GX va w F Hdo zio sez 1 12 zI N evivNi an Siini HEANOHG 9zLu i j sete zua PRA 3 N x eae wuans nL ni err mol zzy yor wy MP Pea LY erie ozlu Mey Lely zea 7 sel 0 aLi 8 T 6L La a At ert a 8 LyNI amn zene a eg ma e e Pee Lia C TOHSSYHL e BuO ges 9 soit 482r er Toro odda A evnt La Z019 x a yv age dl al cos sen ven Na sor ds Fell e me Ye eal vl ose WN Le eu da e E ese 3 yO 2 My T iw a tat Posem zu AS o Ge an 20 E mera o a T wit wy SS ere ges aN wey io lames on E wey Lely oI ies eu 134408 Solo Ploaz AP x001 E Ni gt n zely gaa 6019 ezi R pu SHUA ses A ml i es Fic o WIHL IMALNO EH SL 001d J Ex j M e Nag I ed Soe TW Ma T ld soo X L x v 1 INOHd Sf SS ely oLLO A sgo avo N a 2 Gd Obit VeMS Pate ur ee 9X Ladd Oi ai lady ra O ce 92 2 DOGFET S E O y CD gt o 0 Z O 00 ere 5 5 A O O FT O c OWL O O SC bE OOS EX BD D 2 Z T nm rT A oa ay E O x lt Q 9 Teog r OLY gt Jo gt O O Z OQ s 0w 709 o UIT LN NAS gt cCOHe OMPFPAE C X E oF OGG O coL MS 01 z ovac c LISO i tif oE D og2ero o ANS A a gt Dd av lt lt 7 1 we OWNS 1 vv O Oe 0 E O SeSCae lags cC 5 Peded X O gt C gt Ou D g DU 25 OOD PH m y r N N N mom yt yt O m
3. LLa Old e Z92du LVO HALIM HOSSIHANOO TOEG LITA ONET ieS szigva 91n _ sva sin eziva vin ES szl9va SIN eae Mi y sie iii NOLLWHOdHOO STIOH fae A Anao Hoaas ate SET T od zT LN Z ES D ER Izy RR Leo A E FT 2 Ted an z I af yor a n kJ a Ob J fw 2 bois O Aleo if T con di j gen SS SyS K eyed ae ARANEA frie cory RRL Ne Pa pe za Y X i o salu eae e5 Pp a LOOPNI za Na SX a e He sx sx ver eo a pis KI gt V we a 0S ZIZO rae yz yz Ss gt a LOOPNI a _ o 000 09 444 4 e La ara A esca ISA 2 9H 6SI8 A ESIH 1518 R LSZNI A Lyo LHO iy si ooze A Ove Sin e oiou estu val 2S1u OSIY quo fan ae A E e ogy OL N 1ada ESCH we q IS va lt a 9 At ens oT fe ind yo Wee anor _ 008 09S g vi v i 3NOHa z j pert 5 zit OLLVE At aims i ooi 001 bbzu i wah DUO X 9d Sd R En dNowoauais A ed X019 Oa Lady Oy idda 1s y MEUS i r Xd A 88S Joi VIMS ae P or he er oy ere fen ou S ha nN 8020 q pee lt pa yor Je ged ell e z1 Ge lt en Ni Raal ATHAN 00S Zd ie At A E o9sr z BIZY JIS CIOHSSYHL OY l 3 ral at al a t 5G YN gt y E eS y ez He rem Meyn z0zu DO9E WT pzz k E vOGENZ esem z E WOVE Y 100 Lea T guk 001 our 60 wry 4 y n i Hook YN 80 l L WN My Aa 08 ZO 020 4 01ZH g ved 01 de j i X004 T mateo ah m MO0Ld ze 202 sozo T TA 1 A x Wit 3NOHd Rabon avo a ida Ne AA ao e020 miT a eu vit NOH MOL GELH OL priy anos Ls mit NOH
4. For very large inputs the gain can decrease considerably Therefore as signals get larger the gain reduc tion will increase depending where the Threshold Ratio and Output Level are set GATING Gating is used to cut noise or hiss when there is no signal or when the signal is below a certain threshold Sometimes such as with drums the gate is used to stop all sound except when the drum is played to remove background noise DESCRIPTION FRONT PANEL NOTE Descriptions are identical for both Channels One and Two yes o Ly RES A E GATE RP252 TH RESHOLD Sets the ul al which the RP252 T active When the signal level is below the threshold point the signal is unprocessed When the signal level is above the threshold point there may be compression limiting RATIO This sets the ratio of input signal to signal compression Called signal to compression ratio at 1 1 the signal is left unprocessed and at infinity 1 no matter how much the input increases the output will not be above the threshold this is called limiting ATTACK Adjusts how fast the control circuits respond to the dynamics of the input If this is set longer it will take more time for gain reduction to occur so rapidly rising inputs will go through for a short period of time RELEASE Adjusts how long before the control circuits return to a steady state A short release time can make sound be choppy and gated A long release time can make music
5. A O D O fa Q mo OSODOCO0 gt NX 060g0uwX lt c DL a EW Cc ra Soc xO DDP O Y pu gt gt OOOGOE Y 5 07 SSS T D S 050 uE B Doa L op OL Y O vo0D30 Do v O E D VO c50 a O D O amp O Dd 72 Os DOoO0E C gt Cc rb 2 g cog34 2385 E Oo do E SLE y O O c O CcDm ON y U nn a qo gt Z oo 9O 57 oS Oc OL eae A eS Og DEEZ OTS O 9 cce E N oO O O 2 D O 5 0 O of eS Cl O A OOSS5 M7 LEa OFODE a CD 5 9 OQa Re amp Lu E DOT an mec Z Qe S 00353 DOL 3e ffs geteceweeH gt oo OZE G65 G85 25 3928 88 588559 U35 55 uta PaxOlsssagse ao EL Q CODE i So ESO ALfOHDS r gt 20000AaS NE gt EREICODOON
6. LIMITED WARRANTY This product is warranted to the original consumer purchaser to be free from defects in materials and workmanship under normal installation use and service for a period of one 1 year from the date of purchase as shown on the purchaser s receipt The obligation of Rolls Corporation under this warranty shall be limited to repair or replacement at our option during the warranty period of any part which proves defective in material or workmanship under normal installation use and service provided the product is returned to Rolls Corporation TRANSPORTATION CHARGES PRE PAID Products returned to us or to an authorized Service Center must be accompanied by a copy of the purchase receipt In the absence of such purchase receipt the warranty period shall be one 1 year from the date of manufacture This warranty shall be invalid if the product is damaged as a result of deface ment misuse abuse neglect accident destruction or alteration of the serial number improper electrical voltages or currents repair alteration or maintenance by any person or party other than our own service facility or an authorized Service Center or any use violative of instructions furnished by us This one year warranty is in lieu of all expressed warranties obligations or liabilities ANY IMPLIED WARRANTIES OBLIGATIONS OR LIABILITIES INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF MER CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
7. SHALL BE LIMITED IN DURATION TO THE ONE YEAR DURATION OF THIS WRITTEN LIMITED WARRANTY Some states do not allow limitations on how long an implied warranty lasts so the above limitation may not apply to you IN NO EVENT SHALL WE BE LIABLE FOR ANY SPECIAL INCIDENTAL OR CONSEQUENTIAL DAMAGES FOR BREACH OF THIS OR ANY OTHER WARRANTY EXPRESSED OR IMPLIED WHATSOEVER Some states do not allow the exclusion or limitation of special incidental or consequential damages so the above limitation or exclusion may not apply to you This warranty gives you specific legal rights and you may also have other rights which vary from state to state L XY I ROLLS I A 4 ROLLS CORPORATION SALT LAKE CITY UTAH 11 01 L I ROLLS q p y RP252 Compressor Limiter Gate GAIN REDUCTION CHANNEL Active MTM a 1 0090 1 2 4 6 8 10 12 18 24 38 a ele 12 IRATIC 18 J 24 STEREO LO Y A y lt Q E P S 10 dB 20 30 dB off slow __fast LEVEL GATETHRESH GATE REL 40 dB 10 2 1 com 10 mS 1 5 Sec 5 THRESHOLD RATIO ATTACK RELEASE o 0 o PWR COMPRESSOR LIMITER GATE E l i 30 dB off iow fast R P 2 5 2 O eS GATE THRESH GATE REL ae OWNERS MANUAL SCHEMATIC TABLE OF CONTENTS L JO LIUS L00z 4690390 Y4 0 eq Jai Teine Cao i Z S 62d 82d Zed 92d sed vea Eza zza LZA Oza 6La 81a zta 91q e1a ae aia ein 210
8. T INPUT or lc shock or lo not remo rviceable parts vicing to INPUT ds mono or TRS 1 4 phone connectors or e XLR nae from your line level audio source OUTPUT Use mono or TRS 1 4 phone connectors or balanced XLR to connect to the line inputs on the next device i e mixer recording device amplifier etc SIDE CHAIN The side chain ins outs are 1 4 unbalanced jacks used for control ling the gain reduction circuits with an external signal This is for special effects such as ducking INST LINE SWITCH This switch changes the RP252 dynamic range by 20 GB In for instrument level out for line level signals OPERATION Smoothing Out Electric Bass Bass lines often are inconsistent in level and lack the sustain needed to give a solid bottom end Set the Threshold so that peaks cause 10 dB to 12 dB of compression Use more for increased sustain and for more percussive attacks on the trainsients Fattening Kick Drums and Compressing Other Drum Sounds Weak flabby kick drums often have too much boom and not enough slap Tighen them up by increasing the Attack time and setting the threshold for 15 dB of compression on the peak of the kick Because the RP252 takes time to react this will emphasize the slap at the beginning of the note and reduce the boominess of its body The RP252 also works well for tightening snare drums and tom toms and can be used with drum machines to effectively alter the chara
9. cter of any elec tronic drum sound Variations in Mic Levels In musical applications paging systems churches speaking events etc as the distance between the microphone and the speaker or the vocalist changes signal levels change To keep the level near constant set the threshold and ratio so an average of 6 8 dB of compression is established
10. o it s fullest potential The RP252 provides clear sonic quality and performance for the working musi cian DJ studio operator or anyone needing a friendly Compressor Limiter Gate The RP252 incorporates soft knee compression and a 100 dB log averaging detector for amazing accuracy and smooth performance The input connectors on the rear are designed to be used with 10 dB to 4 dB signal levels UNDERSTANDING COMPRESSION The primary purpose of a compressor is to reduce and control the dynamic range of a program from gentle narrowing of overall levels to limiting of peaks to squashing all dynamics Control is the main idea Another major use for compressors is to add punch to sloppy sounds A compres sor can do this by making the level of an instrument or a sound more consistent or by reducing the volume of the more sustained sections of a note which com paratively accentuates the leading edge Attack Sustain of instruments especially guitars and bass can be achieved by raising the volume of low level trailing edges of a note which gives solid presence to the instrument It also makes the note by note volume more even All this is done by changing the gain in response to the signal When the input is low in level the compressor gain remains fixed usually at 0 dB unity gain or greater When the input increases above the threshold set by the compressor the gain begins to decrease i e the amount of gain reduction increases
11. seem to rise and fall as a wave It is recommended to start with a long Release time then shorten it if necessary OUTPUT LEVEL Sets the output level to help compensate for compression losses If the Threshold is set low more output level may be needed because gain reduction starts at a low level GATE THRESHOLD Included in the RP252 is a noise gate circuit which is accessed with the two gate controls The Gate Threshold sets the point at which the gate opens to let the sound through Below this level the entire signal is shut off When the GATE LED is off there is enough level to operate the gate GATE RELEASE As before this adjusts how long until the gate closes or stops sound after the signal has fallen below the threshold ACTIVE SWITCH Pressing this switch inward activates the compressor STEREO SWITCH This switch joins the control circuits of the two channels so they operate together When processing a stereo signal this helps maintain a more natural sound because both sides are processed exactly the same GAIN REDUCTION LEDs These 10 LEDs display in dB how much the signal is being compressed i e how much gain reduction GATE LED When this is lit no signal passes through the processing circuits and the sound is muted DESCRIPTION CONT REAR PANEL NOTE Descriptions are identical for both Channels One and Two ROLLS MODEL RP252 NING To reduce the L J SERIAL NUMBER e SIDE CHAIN OUTPUT INPUT SIDE CHAIN OUTPU
Download Pdf Manuals
Related Search