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manual abstract
please read these instructions completely. RAMSi SPEAKER SYSTEM WS-A80 GENERAL • This speaker system is a 2-way bass-reflex type speaker system incorporating a 20cm {8") woofer and a Twin Bessel horn tweeter having constant directivity. • It is designed to accept a continuous program input of 160W. This speaker system is ideally suited as a main speaker. The compact design assures full portability and easy installation. • The tweeter and woofer are eacn equipped with an auto-reset type thermal protector to protect them against excessive input levels. • The Twin Bessel horn is designed to minimize the reflection of sound from the open end of the horn an'd to provide a directivity of 60° (horizontal) by 60° (vertical}. This improvement in the constant directivity is effective in eliminating feedback. • The enclosure is a resin molded type and can be set in any desired position. The recessed handles and close-contour design prevent impact damage in transit, while the rigid, weather and temperature resistant cabinet insures long-term reliability. The enclosure features a stacking structure to enable secure stacking of speakers. • The front of the enclosure is covered with a punched metal grille to protect the woofer arid tweeter. • The speaker input jacks (phone plugs} can be replaced with XLR-type connectors. CAUTIONS FOR INSTALLATION • When installing the speaker on a wall or ceiling, it should be secured firmly using rigid anchor bolts to prevent it from coming off. • The speaker can be mounted vertically or horizontally. Select a suitable mounting position according to the place of installation. Please note that the direction of the RAMSA logo cannot be changed. • If the speaker is operated at high output levels, the floor, wall or ceiling may vibrate, which will impair the sound quality. Special care should be taken to prevent resonance and vibrations caused by the mounting angles. CAUTIONS FOR CONNECTION • Before connecting the speaker, be sure to turn off the amplifier power switch. • The input impedance of this speaker is 8 ohms. Check to make sure that the amplifier to be connected is designed to be used with speakers with a 4 to 8 ohms impedance rating. • The connecting cable used for the speaker and amplifier should be as large as possible in diameter to minimize the DC resistance. • When two or more speakers are to be used in the same room, be sure to match the polarity. The plus © and minus 0 push-terminal of each speaker are marked red and black, respectively. • Up to two speakers may be connected in parallel. CONNECTION OF SPEAKER CABLES There are two types of speaker input terminals which should be selected according to applications. (The three terminals are internally connected in parallel.) ' ' ■ ■ Use of push terminals NOTES: • The cable which fits in the hole of the push-terminal, should have a diameter not larger than 7/64" (2.6 mm). To ensure proper fit to the terminal, a cable diameter of less than 5/64” {2 mm) is recommended. • The sheath of the speaker cable should not be inserted into the terminal hole. • When the speaker cable is of a stranded type, the core conductor should be twisted before inserting it into the terminal hole. From amplifier output terminals. Depress the push-terminal and insert the speaker cable from the amplifier into the terminal hole. The plus (+) side is marked red and the minus (-) side marked black. Use of phone jacks NOTES: • Connect the speaker cable to a tip-sleeve (TS) phone plug, then connect it to either jack. • The other jack is then used when installing an additional speaker in parallel. i Installation of additional speakers Connect the speakers in parallel as shown below. The speaker uses a TS phone plugs as an input terminal. When connecting, make sure that the polarity of the TS phone plug matches the polarity of the amplifier output terminals (speaker terminal) as shown in the illustration. Plug cover Q (sleeve) Speaker cable © When two speakers are connected in parallel, the combined impedance becomes 4 ohms. In this case, the speakers should be connected to an amplifier which is designed to drive a load impedance of 4 ohms or less. NOTES: • When three or more speakers are connected in parallel, the combined impedance becomes 3 ohms or less which requires a special type of amplifier. Therefore, do not use more than two speakers for parallel connection. • If the combined impedance of the speakers is lower than the specified impedance on the amplifier to be used, the sound from the speakers may be distorted or the amplifier may be damaged. • When two speakers are used in parallel, make sure that the polarity of these speakers are the same. - 3 - USE OF XLR-TYPE CONNECTOR This speaker may be fitted with an XLR-type connector which is often used for professional applications. (D Remove the phone jack mounting plate and pull it forward. Disconnect the wiring. (D Solder the leads that were disconnected...