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EQ-550Natural Sound Stereo Graphic Equalizer

10 Bands of ± 12 dB EQ per Channel

10-Band Frequency Spectrum Analizer

Built-in Pink Noise Generator

Electret Condenser Microphone Supplied

Thank you for selecting the YAMAHA EQ-550 Stereo Graphic Equalizer.

CONTENTS

Safety Instructions ......................................... 1Caution .......................................................... 2Connections .................................................. 7Front Panel Parts and Functions ................... 8Operations ................................................... 10Specifications .............................................. 11Troubleshooting ........................................... 12

IMPORTANT

Please record the serial number of this unit in the spacebelow.

Model:

Serial No.:

The serial number is located on the rear of the main unit.Retain this Owner’s Manual in a safe place for futurereference.

OWNER’S MANUAL

• Explanation of Graphical Symbols

The lightning flash with arrowheadsymbol, within an equilateral triangle, isintended to alert you to the presence ofuninsulated “dangerous voltage” withinthe product’s enclosure that may be ofsufficient magnitude to constitute a risk ofelectric shock to persons.

The exclamation point within anequilateral triangle is intended to alert youto the presence of important operatingand maintenance (servicing) instructionsin the literature accompanying theappliance.

WARNINGTO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK,DO NOT EXPOSE THIS APPLIANCE TO RAIN ORMOISTURE.

CAUTION

CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT REMOVECOVER (OR BACK). NO USER-SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.

RISK OF ELECTRIC SHOCKDO NOT OPEN

SAFETY INSTRUCTIONS1 Read Instructions – All the safety and operating instructions

should be read before the product is operated.

2 Retain Instructions – The safety and operating instructionsshould be retained for future reference.

3 Heed Warnings – All warnings on the product and in theoperating instructions should be adhered to.

4 Follow Instructions – All operating and use instructionsshould be followed.

5 Cleaning – Unplug this product from the wall outlet beforecleaning. Do not use liquid cleaners or aerosol cleaners.Use a damp cloth for cleaning.

6 Attachments – Do not use attachments not recommendedby the product manufacturer as they may cause hazards.

7 Water and Moisture – The product should not be used nearwater – for example, near a bathtub, washbowl, kitchensink, laundry tub, in a wet basement, or near a swimmingpool, etc.

8 Accessories – Do not place this product on an unstablecart, stand, tripod, bracket, or table. The product may fall,causing serious injury to a child or adult, and seriousdamage to the product. Use only with a cart, stand, tripod,bracket, or table recommended by the manufacturer, or soldwith the product. Any mounting of the product should followthe manufacturer’s instructions, and should use a mountingaccessory recommended by the manufacturer.

9 A product and cart combination should bemoved with care. Quick stops, excessiveforce, and uneven surfaces may cause theproduct and cart combination to overturn.

10 Ventilation – Slots and openings in thecabinet are provided for ventilation and to ensure reliableoperation of the product and to protect it from overheating,and these openings must not be blocked or covered. Theopenings should never be blocked by placing the product ona bed, sofa, rug, or other similar surface. This productshould not be placed in a built-in installation such as abookcase or rack unless proper ventilation is provided orthe manufacturer’s instructions have been adhered to.

11 Power Sources – This product should be operated only fromthe type of power source indicated on the marking label. Ifyou are not sure of the type of power supply to your home,consult your product dealer or local power company. Forproducts intended to operate from battery power, or othersources, refer to the operating instructions.

12 Grounding or Polarization – This product may be equippedwith a polarized alternating current line plug (a plug havingone blade wider than the other). This plug will fit into thepower outlet only one way. This is a safety feature. If you areunable to insert the plug fully into the outlet, try reversingthe plug. If the plug should still fail to fit, contact yourelectrician to replace your obsolete outlet. Do not defeat thesafety purpose of the polarized plug.

13 Power-Cord Protection – Power-supply cords should berouted so that they are not likely to be walked on or pinchedby items placed upon or against them, paying particularattention to cords at plugs, convenience receptacles, andthe point where they exit from the product.

14 Lightning – For added protection for this product during alightning storm, or when it is left unattended and unused forlong periods of time, unplug it from the wall outlet anddisconnect the antenna or cable system. This will preventdamage to the product due to lightning and power-linesurges.

15 Power Lines – An outside antenna system should not belocated in the vicinity of overhead power lines or otherelectric light or power circuits, or where it can fall into suchpower lines or circuits. When installing an outside antennasystem, extreme care should be taken to keep fromtouching such power lines or circuits as contact with themmight be fatal.

16 Overloading – Do not overload wall outlets, extension cords,or integral convenience receptacles as this can result in arisk of fire or electric shock.

17 Object and Liquid Entry – Never push objects of any kindinto this product through openings as they may touchdangerous voltage points or short-out parts that could resultin a fire or electric shock. Never spill liquid of any kind onthe product.

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18 Servicing – Do not attempt to service this product yourselfas opening or removing covers may expose you todangerous voltage or other hazards. Refer all servicing toqualified service personnel.

19 Damage Requiring Service – Unplug this product from thewall outlet and refer servicing to qualified service personnelunder the following conditions:

a) When the power-supply cord or plug is damaged,

b) If liquid has been spilled, or objects have fallen into theproduct,

c) If the product has been exposed to rain or water,

d) If the product does not operate normally by following theoperating instructions, adjust only those controls that arecovered by the operating instructions as an improperadjustment of other controls may result in dangerous andwill often require extensive work by a qualified technicianto restore the product to its normal operation.

e) If the product has been dropped or damaged in any way,and

f) When the product exhibits a distinct change inperformance – this indicates a need for service.

20 Replacement Parts – When replacement parts are required,be sure the service technician has used replacement partsspecified by the manufacturer or have the samecharacteristics as the original part. Unauthorizedsubstitutions may result in fire, electric shock, or otherhazards.

21 Safety Check – Upon completion of any service or repairs tothis product, ask the service technician to perform safetychecks to determine that the product is in proper operatingcondition.

22 Wall or Ceiling Mounting – The unit should be mounted to awall or ceiling only as recommended by the manufacturer.

23 Heat – The product should be situated away from heatsources such as radiators, heat registers, stoves, or otherproducts (including amplifiers) that produce heat.

YAMAHA ELECTRONICS CORPORATION, USA 6660 ORANGETHORPE AVE., BUENA PARK, CALIF. 90620, U.S.A.YAMAHA CANADA MUSIC LTD. 135 MILNER AVE., SCARBOROUGH, ONTARIO M1S 3R1, CANADAYAMAHA ELECTRONIK EUROPA G.m.b.H. SIEMENSSTR. 22-34, 25462 RELLINGEN BEI HAMBURG, F.R. OF GERMANYYAMAHA ELECTRONIQUE FRANCE S.A. RUE AMBROISE CROIZAT BP70 CROISSY-BEAUBOURG 77312 MARNE-LA-VALLEE CEDEX02, FRANCEYAMAHA ELECTRONICS (UK) LTD. YAMAHA HOUSE, 200 RICKMANSWORTH ROAD WATFORD, HERTS WD1 7JS, ENGLANDYAMAHA SCANDINAVIA A.B. J A WETTERGRENS GATA 1, BOX 30053, 400 43 VÄSTRA FRÖLUNDA, SWEDENYAMAHA MUSIC AUSTRALIA PTY, LTD. 17-33 MARKET ST., SOUTH MELBOURNE, 3205 VIC., AUSTRALIA VJ82570-2 BWWBL,b Printed in Japan