Harman Kardon SIXTY Owners Manual - Page 6

MAINTENANCE SUGGESTIONS Once your system is set-up and performing to your satisfaction, a few simple maintenance routines are suggested for long term satisfaction. The surfaces of your loudspeaker are designed to keep looking like new with a minimum of maintenance. Gloss surfaces are of aircraft grade and will maintain their appearance indefinitely. Clean these surfaces with a soft cloth and a glass cleaner. NEVER use abrasive or corrosive cleaners such as powders or bathroom cleaners as these may mar the surface. Hard to remove stains such as adhesives or uncured paint can be removed with a little mild solvent such as turpentine and gentle rubbing with a soft cloth. NEVER use strong solvents like acetone as these can dull the finish. Cloth surfaces are also resistant to abuse. However they can be permanently stained by liquids such as coffee, paint, food and some liquid cleaners. Do not place containers which can leak on top of the speakers. Shiny spots may develop on the cloth during shipment. These are easily removed by brushing briskly with a clean stiff brush. Occasional vacuuming will remove any dust that might accumulate. In general, avoid placing the speakers close to sources of high heat. Continuous sunshine will bleach the cloth surfaces and excessive dampness will damage the wood components. The terminals and connecting strips are gold plated and should never tarnish. However, unless the connectors used on the ends of your wire are also gold plated, they will require periodic cleaning to prevent signal degradation. POWER HANDLING There are no accepted industry standards for determining loudspeaker power handling. No standard could readily account for all the complexities music presents. The power handling of your loudspeaker depends as much on the accompanying equipment and the type of music you listen to, as it does on the components of the speaker system. For instance, a 25 watt amplifier driven beyond its rated output is capable of causing damage to a speaker that would be comfortable at-that listening level with a 200 watt amplifier. Any speaker, even in a well balanced system, has a finite power limit. Speakers give audible indications when they are approaching those limits. A speaker close to its power limit will sound distorted, strained and harsh. When your speakers begin to sound like that, TURN THE VOLUME DOWN to avoid damage. Failure to do so constitutes abuse and will result in damage that will not be covered by your warranty. If you wish, "in-line" fuses can be purchased to protect the speaker from the most violent abuses. However, fuses are not foolproof and can degrade the signal. NEVER, EVER even think about touching the dome of the alloy tweeter. It is FRAGILE and easily dented. This unit depends on the integrity of its shape for its superb performance. Any alteration to that shape will result in a degradation of its fidelity. The speaker is tall and heavy. Be certain that pets and children cannot knock it over. Serious personal injury can result. The damage to the speaker will be the least of your concerns in such cases. Should there appear to be a malfunction, please look through the checklist below before phoning your dealer or bringing your speaker to him. No/Weak Sound: System not powered, check all fuses, circuit breakers etc. Partial short circuit, check connections. Dull Sound: For NORMAL wiring check that connecting strips are firmly attached. If bi-wiring / bi-amping check the connections to the tweeter / midrange. Lack of Bass: Check Polarity. For NORMAL wiring check that connecting strips are firmly attached. If bi-wiring / bi-amping check the connections to the woofers. If the above checklist fails to reveal the problem, contact your dealer. He will help you get the speaker sounding right and arrange repairs if necessary. ADVICE & WARNINGS