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Skoda - Auto - skoda-karoq-2017-110444
Skoda - Auto - skoda-karoq-2017-brukerhandbok-110449
Cars & Automotive Accessories - Kenwood - C929
Toys & Accessories - Lego - DUPLO Town - AROUND THE WORLD - 10805
Skoda - Auto - skoda-karoq-2017-savininko-vadovas-110446
Skoda - Auto - skoda-karoq-2017-manual-del-propietario-110438
Skoda - Auto - skoda-karoq-2017-110460
Skoda - Auto - skoda-karoq-2017-navod-k-obsluze-110433
Skoda - Auto - skoda-karoq-2017-omistajan-kasikirja-110439
Skoda - Auto - skoda-karoq-2017-110457
VCRs & Accessories - Hitachi Electronics - VTM171A
Skoda - Auto - skoda-karoq-2017-110431
Skoda - Auto - skoda-karoq-2017-kullan-m-k-lavuzu-110458
1981-1995--Chrysler--Lebaron--4 Cylinders C 2.2L FI Turbo SOHC--31006701
1981-1995--Chrysler--Lebaron--4 Cylinders J 2.5L MFI Turbo SOHC--31034803
Skoda - Auto - skoda-karoq-2017-110441
Skoda - Auto - skoda-karoq-2017-prirocnik-za-lastnika-110456
1981-1995--Chrysler--Lebaron--4 Cylinders J 2.5L MFI Turbo SOHC--31006702
Skoda - Auto - skoda-karoq-2017-instrukcja-obslugi-110450
Pool Equipment - Haywood-Pool - Super Pump~All Super Pump Models
Skoda - Auto - skoda-karoq-2017-uzivatelska-prirucka-110455
Barossa - Motorcycle - Barossa__Barossa_PYTHON_100cc_parts_5d8a7f921c3648a62136367
Skoda - Auto - skoda-karoq-2017-110453
Barossa - Motorcycle - Barossa_PYTHON_100cc_parts
Skoda - Auto - skoda-karoq-2017-ipasnieka-rokasgramata-110447
Skoda - Auto - skoda-karoq-2017-omaniku-kasiraamat-110436
Skoda - Auto - skoda-karoq-2017-manuel-du-proprietaire-110440
Sewing Machine - Singer - 14T968DC %7C PROFESSIONAL 5
Skoda - Auto - skoda-karoq-2017-manuale-del-proprietario-110445
Skoda - Auto - skoda-karoq-2017-agarmanual-110454
1981-1995--Chrysler--Lebaron--4 Cylinders D 2.6L 2BL SOHC--31218102
1981-1995--Chrysler--Lebaron--4 Cylinders B 2.2L 2BL SOHC--31218101
1981-1995--Chrysler--Lebaron--4 Cylinders D 2.2L TBI SOHC--31095601
Skoda - Auto - skoda-karoq-2017-handleiding-110448
Skoda - Auto - skoda-karoq-2017-110459
Furniture & Storage - Blue Rhino - GAD1375SP
Skoda - Auto - skoda-karoq-2017-kezelesi-utmutato-110443
Skoda - Auto - skoda-karoq-2017-manualul-de-utilizare-110452
Barossa - Motorcycle - Barossa__Barossa_PYTHON_100cc_parts
Skoda - Auto - skoda-karoq-2017-110432
Skoda - Auto - skoda-karoq-2017-instruktionsbog-110435
Speakers & Audio Accessories - Dual - Dual - SX652 ~ SX692
Grills & Accessories - Blue Rhino - Blue Rhino WAD996SP
Skoda - Auto - skoda-karoq-2017-vodic-za-korisnike-110442
Cars & Automotive Accessories - Kenwood - DPX-510
Printers & Accessories - Xerox - WorkCentre Pro C2128~C2636~C3545
1981-1995--Chrysler--Lebaron--4 Cylinders D 2.2L TBI SOHC--31034802
Sewing Machine - Brother - Brother BAS-511
Skoda - Auto - skoda-karoq-2017-owner-s-manual-110437
Cars & Automotive Accessories - Ford - F-150 2001
Video Cameras, Camcorders, & Accessories - Canon - ZR900 Camcorder
Speaker Systems - JBL - Xtreme
Ducati - Motorcycle - Ducati_M620_ie_Parts_2002
Cameras & Accessories - Nikon - Nikon COOLPIX S203
Skoda - Auto - skoda-karoq-2017-manual-do-proprietario-110451
Printers & Accessories - Epson - Stylus Pro 9000
Sewing Machine - Brother - Brother DB2-B798
DJ Equipment - Kramer AV - VM-4HDT
Power Tools & Accessories - STIHL - STIHL Trimmer FS 40, FS 50
Printers & Accessories - Epson - WorkForce 40
Summary of Content
Utility Amplifier GA6A Model Installation and Use Manual © 2004 Bogen Communications, Inc. All rights reserved. Specifications subject to change without notice. 54-5757-03D 1503 NOTICE: Every effort was made to ensure that the information in this guide was complete and accurate at the time of printing. However, information is subject to change. WARNING: To reduce the risk of Fire or Electric Shock, Do Not Expose this apparatus to rain or moisture. Apparatus shall not be exposed to dripping or splashing and no objects filled with liquids, such as vases shall be placed on the apparatus. WARNING: Only connect unit to AC mains outlet providing protective earthing connection. NOTE: Mains plug is used as disconnect device from the mains and shall remain readily accessible and operable. CAUTION: These servicing instructions are for use by qualified service personnel only. To reduce the risk of electric shock, do not perform any servicing other than that contained in the operating instructions unless you are qualified to do so. CAUTION: DO NOT INSTALL OR PLACE THIS UNIT IN A BOOKCASE, BUILT-IN CABINET, OR IN ANOTHER CONFINED SPACE. ENSURE THE UNIT IS WELL VENTILATED. TO PREVENT THE RISK OF SHOCK OR FIRE HAZARD DUE TO OVERHEATING, ENSURE THAT CURTAINS AND ANY OTHER MATERIALS DO NOT OBSTRUCT THE VENTILATION VENTS. Always follow these basic safety precautions when installing and using the unit: IMPORTANT SAFETY INSTRUCTIONS 1. 2. 3. 4. 5. 6. 7. 8. Read these instructions. Keep these instructions. Heed all warnings. Follow all instructions. Do not use this apparatus near water. Clean unit with dry cloth. Do not block any ventilation openings. Install in accordance with the manufacturer's instructions. 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 attachments/accessories specified by the manufacturer. 12. Unplug this apparatus during lightning storms or when not used for long periods of time. 13. 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. CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN CAUTION: TO PREVENT THE RISK OF ELECTRIC SHOCK, DO NOT REMOVE ANY FRONT/BACK COVERS OR PANELS. NO USER-SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED PERSONNEL. The lightning flash with arrowhead symbol, within an equilateral triangle, is intended to alert the user to the presence of uninsulated "dangerous voltage" within the product's enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons. The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance (servicing) instructions. Description The GA6A is a rugged six-watt, dual-input audio amplifier with a wide variety of smaller applications including background music, relaying communication from one room to another, or sound reinforcement. The GA6A delivers rated power at not more than 1% total harmonic distortion from 75-15,000 Hz into transformer-coupled or direct low-impedance loads. Inputs for a low-impedance balanced dynamic microphone and an auxiliary audio source (tuner, CD player, etc.) can be mixed. Individual front-panel controls regulate the level of each input. Connections for 8-ohm and 25V or 70V speaker lines are provided on the rear panel output terminal strip. A 3-position switch is supplied to provide 9 dB of treble boost or cut at 10,000 Hz or flat response. Package Contents (1) GA6A (1) Installation and Use Manual Accessories WMT1A Matching Transformer • Hi-Z, 10k-ohm primary impedance • Lo-Z, 600-ohm secondary impedance, balanced with center tap • Matches high-to-low impedance or low-to-high impedance • Adapts line level signals to microphone inputs 3 Panel Descriptions Utility Amplifier Front Panel 1. MIC Control - Regulates the level of microphone output to speakers. 2. AUX Control - Regulates the level of the AUX source to speakers. 3. Power Switch - Controls AC power to the amplifier. Illuminates when ON. Utility Amplifier Rear Panel 1. Speaker Output Barrier Strip - Output terminal strip provides for 8-ohm, 25V, and 70V speaker outputs. 2. Shorting Link - Used when 25V or 70V speakers are to be connected to the GA6A. Must be removed if 8-ohm speakers are to be connected to the GA6A. 3. Microphone Terminal - Input terminal strip for a balanced low-impedance dynamic microphone. 4. AC Line Cord - 120V ~, 60 Hz, 0.15A line cord terminated in a three-prong plug. 5. Treble Control Switch - A 3-position switch that controls the application of 9 dB of treble boost or cut at 10,000 Hz or flat response. 6. AUX Input - High-impedance AUX RCA jack input. 4 Connections 70V & 25V Speaker Systems Connect the 25V or 70V speaker loads to the corresponding terminals (25V or 70V) and the common terminal. Make sure that the total wattage of all the connected speakers is less than 6 watts. Note: Do not use both the 25V and 70V terminals at the same time. Use only one type of speaker (25V or 70V) for all speakers connected to the GA6A. Note: If using multiple speakers, check for proper phasing. See Section on Phasing. Link The shorting link must be in place when using 25V or 70V speakers. 8Ω Speaker Systems Low-impedance 8-ohm speakers can be connected to the GA6A. When using multiple speakers, the installer must make sure that the total speaker load is not less than 8 ohms. Higher than 8 ohm impedances are safe to connect to the GA6A, but the GA6A will not deliver its full output power to these higher impedance loads. Connect the 8-ohm speaker load to the GND and 8-ohm terminals and remove the shorting link. 25V and 70V outputs will not work in this configuration. Note: If using multiple speakers, check for proper phasing. See Section on Phasing. 5 Connections Phasing As the voltage on a speaker changes from plus to minus, the speaker cone moves from pushing out to pulling in. If you reverse the polarity, the speaker responds in the opposite manner. If a speaker is pushing out and an adjacent speaker is pulling in, some of the pressure caused by the speaker pushing out will be absorbed by the speaker pulling in. These two speakers are operating out of phase. Microphone Input Connect a low-impedance dynamic microphone (these microphones connect using 3 wires and do not require a power source) to the microphone terminals as shown. Note: Condenser microphones will not work with the GA6A because the GA6A does not supply phantom power, which is required for these microphones to operate. Use two-conductor shielded cable for a balanced input and connect the shield to the ground terminal. Auxiliary Input Use a shielded RCA cable to connect to the high-impedance AUX input. The center of the connector is hot and the outside is ground. Power and Grounding The AC line cord should be plugged into a three-wire, grounded outlet providing 120V ~ , 60 Hz. It is important to ground the unit. 6 +� � +� � +� � Out-of-phase speaker connection. _ _ _ The important thing is to wire all the same polarity (+ or -) connections together. This will ensure that the speakers in the system all work in unison. All paging speaker connections have a polarity indicator. It may be a color code, plus (+) and minus (-) symbols, or a red dot. _ In a paging system, all the speakers should be in phase so that they all push out at the same time. Out of phase speakers operate perfectly well and will not cause any harm to a paging system, but will tend to diminish the bass response in the area around the out of phase speaker. +� � Operation Power The AC line cord should be plugged into a three-wire, grounded outlet providing 120V ~, 60 Hz. The power switch illuminates when unit is switched ON. MIC Control Controls the amount of MIC signal heard at the output. Clockwise increases the signal. AUX Control Controls the amount of AUX signal heard at the output. Clockwise increases the signal. Treble Control Switch Provides a stepped increase or decrease in high frequency (above 10 kHz) heard at the output. The “Cut” position can help reduce high frequency feedback. The “Flat” position provides no modification to high frequency response. The “Boost” position provides more clarity and intelligibility to speech. Overload Protection The amplifier output is protected against overload and shorted speaker lines by a thermostat enclosed in the power transformer. If the breaker opens, the amplifier will have no output. Set the Power switch to OFF and wait a reasonable time for the breaker to reset. If the breaker trips again, have the trouble investigated by a qualified technician. 7 Specifications Power Output: 6 watts RMS Frequency Response: 30 Hz to 12 kHz +0 dB, -3 dB Total Harmonic Distortion: 1% @ rated output Power Bandwidth: 75 Hz to 15 kHz Inputs: Lo-Z MIC, balanced or unbalanced; AUX Sensitivity: MIC 0.3 mV; AUX 0.2 V MIC Dynamic Range: 46 dB Hum and Noise: MIC -50 dB; AUX -64 dB below rated output Output Impedance/Voltage: 8 ohms; 25V & 70V line Tone Control: 9 dB treble boost at 10 kHz, 9 dB treble cut at 10 kHz Protection: Internal Thermostat Controls: MIC, AUX, illuminated POWER switch Terminations: Outputs and Microphone — terminal strip Auxiliary — RCA-type phono plug Power Consumption: 16W, 120V ~, 60 Hz Dimensions: 8-1/2" W x 2-3/4" H x 6" D Shipping Weight: 6 lb. Limited Warranty; Exclusion of Certain Damages The Bogen GA6A Utility Amplifier is warranted to be free from defects in material and workmanship for two (2) years from the date of sale to the original purchaser. Any part of the product covered by this warranty that, with normal installation and use, becomes defective (as confirmed by Bogen upon inspection) during the applicable warranty period, will be repaired or replaced by Bogen, at Bogenʼs option, provided the product is shipped insured and prepaid to: Bogen Factory Service Department, 4570 Shelby Air Drive, Suite 11, Memphis TN 38118, USA. Repaired or replacement product will be returned to you freight prepaid. This warranty does not extend to any of our products that have been subjected to abuse, misuse, improper storage, neglect, accident, improper installation or have been modified or repaired or altered in any manner whatsoever, or where the serial number or date code has been removed or defaced. THE FOREGOING LIMITED WARRANTY IS BOGENʼS SOLE AND EXCLUSIVE WARRANTY AND THE PURCHASERʼS SOLE AND EXCLUSIVE REMEDY. BOGEN MAKES NO OTHER WARRANTIES OF ANY KIND, EITHER EXPRESS OR IMPLIED, AND ALL IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE ARE HEREBY DISCLAIMED AND EXCLUDED TO THE MAXIMUM EXTENT ALLOWABLE BY LAW. Bogen's liability arising out of the manufacture, sale or supplying of products or their use or disposition, whether based upon warranty, contract, tort or otherwise, shall be limited to the price of the product. IN NO EVENT SHALL BOGEN BE LIABLE FOR SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, LOSS OF PROFITS, LOSS OF DATA OR LOSS OF USE DAMAGES) ARISING OUT OF THE MANUFACTURE, SALE OR SUPPLYING OF PRODUCTS, EVEN IF BOGEN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES OR LOSSES. Some States do not allow the exclusion or limitation of 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. Products that are out of warranty will also be repaired by the Bogen Factory Service Department – same address as above or call 201-934-8500. The parts and labor involved in these repairs are warranted for 90 days when repaired by the Bogen Factory Service Department. All shipping charges in addition to parts and labor charges will be at the owner's expense. All returns require a Return Authorization number. For most efficient warranty or repair service, please include a description of the failure. 11/2014 www.bogen.com