Yorkville ap 1020 owners manual

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IMPOR TANT SAFETY INSTR UCTIONS safety-4v2.eps A ug 26/05 CA UTION : TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NO T REMO VE CO VER (OR BA CK). NO USER SER VICEABLE PA RTS INSIDE . REFER SER VICING TO QU ALIFIED SER VICE PERSONNEL. INSTR UCTIONS PER TA INING TO A RISK OF FIRE, ELECTRIC SHOCK , OR INJUR Y TO PERSON S Read Instructions The Owner s Manualshould be read and understood bef ore operation of y our unit. Please , sa ve these inst ruc- tions for future ref erence . Pa ck aging Keep the bo x and pac kaging mater ials , in case the unit needs to be retur ned f or ser vice . Warning When using electr ic products , basic precautions should alw ays be f ollo wed, including the follow ing: Po wer Sour ce s Your unit should be connected to a po wer source only of the voltage specified in the owners manual or as ma rked on the unit . This unit has a polar ized plug. Do not use with an e xtension cord or receptacle unless the plug can be fully inser ted. Precautions should be tak en so that the grounding scheme on the unit is not def eated. Hazar ds Do not place this product on an unstab le car t, stand, tr ipod, brac ket or table. The product ma y fall, causing ser ious personal injur y and ser ious damage to the product. Use only with car t, stand, tr ipod, bra cke t, or table recommended by the manuf acturer or sold with the product. Follo w the manuf acturer s instr uctions when installing the product and use mounting accessor ies recommended by the manuf acturer . The apparatus should not be e xposed to dr ipping or splashing w ater ; no objects filled with liquids should be placed on the apparatus . Terminals mar ked with the lightning bolt are hazardous liv e; the exter nal wir ing connected to these ter minals require installation by an instr ucted person or the use of ready made leads or cords . No nak ed flame sources , such as lighted candle s, should be placed on the apparatus . Po wer Cor d The AC supply cord should be routed so that it is unlik ely that it will be damaged. If the AC supply cord is damaged DO NO T OPERA TE THE UNIT . ServiceThe unit should be ser viced only by qualified ser vice personnel. A VIS: AFIN DE REDUIRE LES RISQUE DE CHOC ELECTRIQUE,NENLEVEZ P AS LE COUVER T (OU LE P ANNEA U ARRIERE) NE CONTIENT AU CUNE PIECE REP ARABLE PA R LUTILISA TEUR. CONSU LT EZ UN TECHNICIEN QU ALIFIE POUR LENTRETIENT INSTR UCTIONS RELA TIVES AU RISQUE DE FEU , CHOC ÉLECTRIQUE, OU BLESSURES AU X PERSONNES Veuillez Lire le Manue l Il contient des inf ormations qui de vraient êtres compr ises avant lop ération de v otre appareil . Conser vez S.V.P. ces instr uctions pour consultations ul térieure s. Emballag e Conse rvez la boite au cas ou lappareil de vait être retour ner pour réparation. Attention: Lors de lutilisation de produits électr ique , assurez-v ous dadh érer à des pr écautions de bases incluant celle qui suiv ent: AlimentationLappareil ne doit être branch é quà une source dalimentation correspondant au voltage sp écifié dans le manuel ou tel qu indiqu é sur lappareil . Cet appareil est équip é dune pr ise dalimentation polar isée. Ne pas utiliser cet appareil avec un cordon de raccordement à moins quil soit possib le dinsérer compl ètement les trois lames . Des précautions doiv ent êtres pr ises afin deviter que le syst ème de mise à la terre de lappareil ne soit désengag é. RisqueNe pas placer cet appareil sur un char iot, un suppor t, un tr épied ou une table instab les. Lappareil pourrait tomber et blesser quelqu un ou subir des dommages impor tants . Utiliser seulement un chariot, un suppor t, un tr épied ou une tab le recommand és par le f abr icant ou v endus avec le produit. Suivre les instr uctions du f abr icant pour installer lappareil et utiliser les accessoires recommand és par le f abr icant. Il con vient de ne pas placer sur lappareil de sources de flammes nues , telles que des bougies allum ées. Lappeil ne doit pas être e xpos é à des égouttements deau ou des éclaboussures et qu aucun objet rempli de liquide tel que des v ases ne doit être plac é sur lappareil. Les dispositifs marqu és dune symbole déclair sont des par ties dangereuses au toucher et que les câblages extérieurs connect és à ces dispositifs de connection extérieure doiv ent être eff ectiv és par un opérateur formé ou en utilisant des cordons déjà prépar és. Cor don dAlimentatio n Évitez dendommager le cordon dalimentation . NUTILISEZ P AS LAPPAREIL si le cordon dalimentation est endommag é. ServiceConsultez un technicien qualifi é pour lentretien de v otre appareil.

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 Introduction Your new Yorkville AP1020 power amplifier has been designed and built to provide years of trouble free performance. The AP1020 starts with the field-proven reliability of our Audiopro amplifiers and customer requested features like switchable limiters and a Mono/Stereo/Bridge switch. Weve made the AP1020 power configurable, (see Power Configuration), which makes it one of the most versatile amp in its class. The AP1020 weighs a comfortable, but solid, 39 pounds; it fits into two rack spaces and reproduces music with over 1200 Watts of headroom. It will drive reactive phase shifted loads with no difficulty - even though it is fully protected from accidental short circuits. Our design goal was to create an amplifier, which would do exactly what an amplifier should do: reproduce music with great power, complete reliability, and uncompromising signal fidelity. We think you will agree that the Yorkville AP1020 does exactly that. We hope this manual will provide answers to any questions you may have about the features, controls, and characteristics of this amplifier. Inputs Balanced InputsEither XLR or two circuit Ring, Tip, Sleeve stereo ¼-inch PHONE cords may be used. Each channels XLR input is internally par - alleled with its phone input: The Tip of the Channel A Phone input is connected to pin 2 of its XLR input, the Ring is con - nected to pin 3, and the Sleeve is connected to pin 1. Pin 2 is in phase, pin 3 is 180 degrees out of phase, and pin 1 is ground. We recommend using balanced lines for the best hum-free per - formance, particularly when chaining multiple amplifiers. Unbalanced InputsOrdinary single circuit standard 1/4 inch phone plugs may be used to connect unbalanced signals. Important Note: Such plugs effectively connect the ring terminal to sleeve ground, so they work correctly. However, if you use a stereo ¼-inch phone plug on an unbalanced line, you must short the ring ter - minal to the sleeve terminal, otherwise the sensitivity will be 6 dB lower than is specified! (The same applies to the XLR input; to connect an unbalanced source via the XLR input, you must connect the signal to pin 2 and ground both pin 1 and pin 3). Remote ReferencingYou can approach balanced performance with unbalanced sources by utilizing the remote reference feature of the AP1020 Connect a balanced cable to the AP1020 just as you would if you were run - ning a balanced line. At the other end, connect pin 3 and pin 1 together, (or connect ring to sleeve if you are using a phone plug cable), and plug this modified end into your unbalanced piece of equipment. This connection enables the AP1020s input to look down the cable directly at the output jack of the unbalanced equip - ment. Any hum voltage generated across the cables impedance will be attenuated by the common mode rejection of the AP1020. Driving Multiple AP1020sIn large installations it is often desirable to operate many amplifi - ers in tandem. Since each channels XLR input is internally paral - leled with its phone input, you may use the remaining input jack as an output to the next amplifier. Obviously you will need both XLR-to-XLR and phone-to-phone patch cords if you are going to tandem more than two amplifiers. Note: These patch cords must be balanced whether the input signal is balanced or unbalanced! Ground SwitchSwitching the ground switch on the rear panel will disconnect chassis ground from circuit ground. Safety ( earth ) ground is still connected to the chassis. We do not rec - ommend lifting the ground strap unless you are experiencing problems with ground loop hum in multiple amplifier setups where lifting the ground straps of all but one amplifier cures the hum problem. CAUTION: Sometimes hum problems are an indication of improper AC wiring somewhere else in your system. Dont just doctor the symptom by lifting grounds. Fix the cause by making sure that the proper electrical wiring safety regula - tions have been adhered to. ModesThe AP1020 can be configured for dual-Mono , Stereo, or Bridged Mono operation via this rear panel Mode switch. The following is a description of each mode: Mono Mode- Channels A and B inputs are paralleled - Each gain control adjusts the signal level for its respective channel - Output signals are of equal phase . - Two loads are driven. - Loads are connected between the black and red post on each channel.