View User`s Manual [US] - Acoustic Amplification
Contents
1. mu _ co A L aas esc LES D JE Q gt Ek we JE 2 a E lt gt os ek o lt acoustic FCC Statements 1 Caution Changes or modifications to this unit not expressly approved by the party responsible for compliance could void the user s authority to operate the equipment 2 Note This equipment has been tested and found to comply with the limits for a Class B digital device pursuant to Part 15 of the FCC Rules These limits are designed to provide reasonable protection against harmful interference in a residential installation This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instructions may cause harmful interference to radio communications However there is no guarantee that interference will not occur in a particular installation If this equipment does cause harmful interference to radio or television reception which can be determined by turning the equipment off and on the user is encouraged to try to correct the interference by one or more of the following measures Reorient or relocate the receiving antenna Increase the separation between the equipment and receiver Connect the equipment into an outlet on a circuit different from that to which the receiver is connected Consult the dealer or an experienced radio TV technician for help All trade2. ing Immer is creates a shi th th A CHORUS ON OFF SWITCH B CHORUS RATE CONTRO 6 REVERB ill speed up the rate of the Chorus effect IS W ive soundwaves ience of reflect imulates the natural amb IS S th A REVERB ON OFF SWITCH B REVERB LEVEL CONTROL 7 AUX IN this 1 8 ify the amount of reverb present in your signal the level control will intens Increasing MP3 player or any other stereo source so you can play in a CD ill allow you to plug just the output volume of the dev jack w 3 conductor Aux input Ice along To control the volume of this input ad 8 HEADPHONE this 1 8 will disconnect the internal speaker t 9 When used in headphones ing inate with a soft amber color when the amp is turned on and ready to play jack is for plugg conductor 3 illum itch w 9 POWER this rocker sw com www AcousticAmplification acoustic acoustic G0 UE Fe SET GROUND E ur SERIAL NO Fe e UL us LISTED No User Serviceable Parts REAR PANEL 1 POWER A AC LINE IN this plug accept a standard CLASS 1 IEC grounded cable included to provide AC power to the amplifier B VOLTAGE SELECTOR used to select the input voltage level to 110 115V or 220 230V Voltage standards vary by country This switch is preset at the factory Setting the power supply voltage switch to the incorrect input vol
3. any parts Unplug cables by gripping plugs firmly Do not pull on cables Physical shocks caused by dropping or bumping can result in serious damage CLEANING Clean with a dry soft cloth slightly damp cloth may be used to remove stubborn grime and dirt Never use cleaners such as alcohol or thinner ELECTRICAL INTERFERENCE The A20 contains electronic circuitry that may cause interference if placed too close to radio or television receivers If this occurs move the A20 further away from the affected equipment SERVICE AND MODIFICATION There are no user serviceable parts in the A20 Do not attempt to open the A20 or make any change to circuits or parts This will void the warranty www AcousticAmplification com acoustic dd 1 VOLUME 1 ur FEEDBACK ea LOW LEVEL FREQUENCY CHORUS REVERB oe O o 0 Oo 5 s CHORUS e REVERB ON OFF ON OFF s acoustic 2 F 3 FRONT PANEL 1 INPUTS combination 14 2 conductor instrument cable or XLR 3 4 conductor microphone 2 VOLUME CONTROLS these adjust the overall loudness of the corresponding input If your acoustic instrument has a preamp you should set the Volume control on your instrument at about half volume You can then adjust the amplifier volume to your normal playing level and still have room to increase or decrease your volume as needed from the instrument 3 EQUALIZATION A LOW FREQUENCY set to
4. boost 15 dB or cut 15 dB frequencies at 100Hz Controls the lowest fundamental frequencies to enhance the warmth and deep full tones of your acoustic instrument or vocals B MIDRANGE FREQUENCY set to boost 15 dB or cut 15 dB frequencies at 800Hz Allows you to control the definition and voice of your acoustic instrument or vocals C HIGH FREQUENCY set to boost 15 dB or cut 15 dB frequencies at 7kHz Increasing this will enhance the clarity and brightness of your acoustic instrument or vocals 4 FEEDBACK ELIMINATION A FEEDBACK ELIMINATION LEVEL this adjusts the amount of feedback filtering Be sure to set this control to off if you are not experiencing any feedback issues B FEEDBACK ELIMINATION FREQUENCY this adjusts the frequency of the feedback filtering To control Feedback do the following 1 Set the Level control to 12 o clock setting or higher 2 Turn the Frequency knob moving from left to right to search for the frequency at which the feedback is to be suppressed A If in the lower register start at 0 position B Sweep to the right if the frequency is in the higher register C When the feedback is eliminated reduce the Level control until the feedback returns then adjust slightly upward until it is gone www AcousticAmplification com E en E a Gd 4 LAS C D Ze gt N INSTRUMENT AMP 3 CHORUS ical tonal effect MUS
5. de bruit ont defini les expositions tolerees aux niveaux de bruits DURE EN HEURES PAR JOUR 8 INIVEAU SONORE CONTINU EN dB 90 Selonles autorites toute exposition dans les limites citees ci dessus peuvent provoquer certaines pertes d audition Des bouchons ou protections dans l appareil auditif ou sur l oreille doivent etre portes lors de l utilisation de ce systeme d amplification afin de prevenir le risque de perte permanente de l audition Dans le cas d expositions superieures aux limites precitees il est recommande afin de se premunir contre les expositions aux pressions acoustiques elevees potentiellement dangeureuses aux personnes exposees aux equipements capables de delivrer de telles puissances tels ce systeme d amplification en fonctionnement de proteger l appareil auditif 12 14 15 16 LVA 18 13 14 15 16 17 18 Unplug this apparatus during lightning storms or when unused for long periods of time Refer all servicing to qualified service personnel Servicing is required when the apparatus has been damaged in any way such as power supply cord or plug is damaged liquid has been spilled or objects have fallen into the apparatus the apparatus has been exposed to rain or moisture does not operate normally or has been dropped Refer all servicing to a qualified service professional Servicing is required when the apparatus does not operate normally or has been damaged in any way including damage
6. STRUCTIONS IN THE LITERATURE ACCOMPANYING THE UNIT CE SYMBOLE APOUR BUT D AVERTIR L UTILISATEUR DE LA PRESENCE D INSTRUCTIONS D UTILISATION ET DE MAINTENANCE DANS LES DOCUMENTS FOURNIS AVEC CE PRODUIT APPARATUS SHALL NOT BE EXPOSED TO DRIPPING OR SPLASHING AND THAT NO OBJECTS FILLED WITH LIQUIDS SUCH AS VASES SHALL BE PLACED ON THE APPARATUS AFIN DE REDUIRE LES RISQUE D INCENDIE ET DE DECHARGE ELECTRIQUE NE PAS EXPOSER CET APPAREIL ALA PLUIE OU A L HUMIDITE www AcousticAmplification com acoustic WHAT SETS THE A20 APART Your new Acoustic A20 amplifier is designed to sound great with any acoustic instrument or vocals We put a lot of thought and effort into selecting exactly the right components and designing a product that will be easy to adjust so you can quickly find the voice of your instrument and project it beyond your personal performance space Here a few of the features that we put into the A20 to make you sound your best 20 watt output perfect for solo performance rehearsal and more Two inputs each with combo XLR 1 4 jacks for use with instruments or vocal microphones 1x 8 co ax speaker featuring a polypropylene cone with a rubber surround for extended frequency response combined with a tweeter for chime like high end clarity Shelf ported cabinet design for extended bass response 3 Band EQ for great tonal control Digital chorus with adjustable rate Digital reverb with adjustable level Var
7. caution when moving the cart apparatus combination to avoid injury from tip over 1 Lisez ces instructions 2 Conservez ces instructions 3 Respectez tous les avertissements 4 Suivez toutes les instructions 5 N utilisez pas cet appareil pr s de l eau 6 Nettoyez avec un chiffon sec 7 Ne bloquez pas les ouvertures de ventilation Installez les conform ment aux instructions du fabricant 8 Ne l installez pas pr s de sources de chaleur telles que des radiateurs des ouvertures des po les ou d autres appareils incluant les amplificateurs produisant de la chaleur 9 Ne contournez pas le dispositif de s curit de la fiche polaris e ou masse Une fiche polaris e poss de deux lames dont une plus large que l autre Une fiche de terre a deux lames et une troisi me broche de masse La lame large ou la troisi me broche sont fournies pour votre s curit Si la fiche fournie ne rentre pas dans votre prise consultez un lectricien pour le remplacement de la prise obsol te 10 Prot gez le cordon d alimentation pour qu il ne soit pas pi tin ou pinc en particulier au niveau des fiches des prises de courant et du point de sortie de l appareil 11 Utilisez uniquement les fixations accessoires sp cifi s par le fabricant 12 Utilisez uniquement avec le chariot le stand le tr pied le support de table sp cifi s par le fabricant ou vendus avec l appareil Lorsque vous utilisez un chariot soyez prudent e lorsque
8. i control feedback elimination Full feature direct output with ground lift pre post EQ and level No matter what your style of playing or choice of acoustic instrument you will find that your new amp will capture and project the very best of your musical voice www AcousticAmplification com USER S MANUAL 20 WATT ACOUSTIC INSTRUMENT AMP SPECIFICATIONS i Power 20W RMS Equalizer Low l5dB 100Hz Med 15dB 800Hz High 15dB 7kHz Channels 1 Inputs 2 Digital Reverb Digital Chorus Feedback Elimination Filter Speaker 8 Co ax Studio Monitor Style Dimensions 14 4 H x 13 0 W x 15 8 D Weight 21 5 Ibs TAKING CARE OF YOUR NEW AMPLIFIER LOCATION To avoid deformation discoloration or more serious damage do not expose the unit to direct sunlight high temperature sources or excessive humidity POWER SUPPLY Turn the power switch off when the A20 is not in use The AC cable should be unplugged from the AC outlet if the A20 will not be used for an extended period of time Avoid plugging the AC cable into an AC outlet that is also powering high consumption appliances such as electric heaters or televisions Avoid using multi plug adapters since these can reduce sound quality cause operation errors and result in possible damage To avoid damage turn off the A20 power switch and all related devices prior to connecting or disconnecting cables HANDLING AND TRANSPORT Never apply excessive force to
9. marks and registered trademarks mentioned herein are recognized as the property of their respective holders 1403 10095 www AcousticAmplification com IMPORTANT SAFETY INSTRUCTIONS IMPORTANTES INSTRUCTIONS DE SECURITE USER S MANUAL 20 WATT ACOUSTIC INSTRUMENT AMP 1 Read these instructions 2 Keep these instructions 3 Heed all warnings 4 Follow all instructions 5 Do not use this apparatus near water 6 Clean only with dry cloth 7 Do not block any ventilation openings Install in accordance with the manufacturer s instructions 8 Do not install near any heat sources such as radiators heat registers stoves or other apparatus including amplifiers that produce heat 9 Do not defeat the safety purpose of the polarized or grounding type plug A polarized plug has two blades with one wider than the other A grounding type plug has two blades and a third grounding prong The wide blade or the third prong are provided for your safety If the provided plug does not fit into your outlet consult an electrician for replacement of the obsolete outlet 10 Protect the power cord from being walked on or pinched particularly at plugs convenience receptacles and the point where they exit from the apparatus 11 Only use the attachments accessories specified by the manufacturer 12 Use only with the cart stand tripod bracket or table specified by the manufacturer or sold with the apparatus When a cart is used use
10. nctionne pas normalement ou s il est tomb ATTENTION Pour r duire le risque d incendie ou de choc electrique ne pas exposer l appareil la pluie ou l humidit Quand La prise MAINS au coupler est utilis pour la source d alimentation lectrique Il est conseill de garder cette prise facilement accessible Borne de terre de protection L appareil doit tre connect un connecteur AC principale avec un raccordement la terre de protection RISK OF ELECTRIC SHOCK DO NOT OPEN CAUTION TO REDUCE THE RISK OF ELECTRIC SHOCK DO NOT REMOVE CHASSIS NO USER SERVICEABLE PARTS INSIDE REFER SERVICING TO QUALIFIED SERVICE PERSONNEL ATTENTION RISQUE DE CHOC ELECTRIQUE NE PAS OUVRIR ATTENTION AFIN DE LIMITER LE RISQUE DE CHOC ELECTRIQUE NE PAS ENLEVER LE CHASSIS NE CONTIENT PAS DE PIECES POUVANT ETRE REPAREE PAR L UTILISATEUR CONFIER LE SERVICE APRES VENTE AUX REPARATEURS AGREES THIS SYMBOL IS INTENDED TO ALERT THE USER TO THE PRESENCE OF NON INSULATED DANGEROUS VOLTAGE WITHIN THE PRODUCT S ENCLOSURE THAT MAY BE OF SUFFICIENT MAGNITUDE TO CONSTITUTE A RISK OF ELECTRIC SHOCK TO PERSONS CE SYMBOLE APOUR BUT D AVERTIR L UTILISATEUR DE LA PRESENCE DE VOLTAGE DANGEREUX NON ISOLE A L INTERIEUR DE CE PRODUIT QUI PEUT ETRE DE PUISSANCE SUFFISAMMENT IMPORTANTE POUR PROVOQUER UN CHOC ELECTRIQUE AUX PERSONNES THIS SYMBOL IS INTENDED TO ALERT THE USER TO THE PRESENCE OF IMPORTANT OPERATING AND MAINTENANCE SERVICING IN
11. tage could damage the power supply and possibly other parts of your equipment 2 DIRECT OUTPUT A PRE POST EQ SWITCH this switch determines if your direct output signal will be effected by the front panel equalization settings In the PRE setting the direct signal is not effected by the front panel settings in POST setting the direct signal is effected by the EQ settings B DIRECT OUTPUT LEVEL this adjusts the overall level of the direct output C DIRECT OUTPUT connect a standard XLR balanced cable from this jack to provide a line level signal to your PA system powered speaker or other powered output device D GROUND LIFT this switch disconnects pin 1 on the XLR jack which is connected to the shield in the cable and acts as the ground point of the circuit reducing ground related noise 3 EFFECTS LOOP these 14 unbalanced send and returns allow you to run external effects between the preamp and the power amp resulting in clearer effects signal and cleaner levels line level vs instrument level Connect the Send to your effect devices input and the output from your device to the Return
12. to the power cord or plug damage due to liquids spilled or objects dropped inside the unit dropping the unit or anything else that interrupts normal use of the unit WARNING To reduce the risk of fire or electric shock do not expose this apparatus to rain or moisture When the MAINS plug or an appliance coupler is used as the disconnect device the disconnect device shall remain readily operable Protective Ground Terminal The apparatus shall be connected to an AC main socket with a protective earth ground connection D branchez cet appareil pendant les orages ou lorsqu il n est pas utilis pendant de longues p riodes de temps Confiez toute r paration un personnel qualifi Une r paration est n cessaire lorsque l appareil a t endommag de quelque fa on que ce soit comme par exemple si le cordon d alimentation ou la fiche sont endommag s du liquide a t renvers ou des objets sont tomb s dans l appareil si l appareil a t expos la pluie ou l humidit s il ne fonctionne pas normalement ou s il est tomb Pour toutes interventions techniques s adresser un technicien qualifi L intervention technique est n cessaire lorsque l appareil a t endommag de n importe quelle fa on comme par exemple si le cordon secteur ou sa fiche sont d t rior s si du liquide acoul ou si des objets sont tomb s l int rieur de l apparei1 si l appareil a t expos la pluie ou l humidit s il ne fo
13. vous d placez le chariot l appareil pour viter des blessures dues au renversement DANGER Exposure to extremely high noise levels may cause permanent hearing loss Individuals vary considerably to noise induced hearing loss but most will lose some hearing if exposed to intense noise for a sufficient period of time The U S Government s Occupational Safety and Health Administration OSHA has specified the following permissible noise level exposures DURATION PER DAY HOURS SOUND LEVEL dB 103 According to OSHA any exposure in the above permissible limits could result in some hearing loss Ear plugs or protectors in the ear canal or over the ears must be worn when operating this amplification system in order to prevent a permanent hearing loss If exposure in excess of the limits as put forth above to insure against potentially harmful exposure to high sound pressure levels it is recommended that all persons exposed to equipment capable of inducing high sound pressure levels such as this amplification system be protected by hearing protectors while this unit is in operation DANGER L exposition a des niveaux eleves de bruit peut provoquer une perte permanente de l audition Chaque organisme humain reagit differemment quant a la perte de l audition mais quasiment tout le monde subit une diminution de l acuite auditive lors d une exposition suffisamment longue au bruit intense Les autorites competentes en reglementation
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