Operation Manual Public Address Amplifier MA-206U/212U/224U
PUBLIC ADDRESS AMPLIFIER Welcome A personal welcome to you from the management and employees of Inter-M All of the co-workers here at Inter-M are dedicated to providing excellent products with inherently good value, and we are delighted you have purchased one of our products. We sincerely trust this product will provide years of satisfactory service, but if anything is not to your complete satisfaction, we will endeavor to make things right.
PUBLIC ADDRESS AMPLIFIER Contents Unpacking .......................................................................................................................................2 Installation Environment....................................................................................................................................2 Important Safety Instructions.............................................................................................................2 Features.......................
PUBLIC ADDRESS AMPLIFIER Unpacking Although your MA-206U/212U/224U is neither complicated nor difficult to operate, we recommend you take a few minutes to read this brief manual and familiarize yourself with the important information regarding product features, setup and operation. As with most electronic devices, we strongly recommend you retain the original packaging. In the unlikely event the product must be returned for servicing, the original packaging (or reasonable equivalent) is required.
PUBLIC ADDRESS AMPLIFIER Features - A PUBLIC ADDRESS AMPLIFIER WITH RATED OUTPUT OF 60W/120W/240W TAKE UP THE DIGITAL AMPLIFIER CIRCUIT WITH HIGH EFFICIENCY OF THE RATED POWER 60W/120W/240W, HIGH RELIABILITY, LOW WEIGHT AND LOW TEMPERATURE. - SUPPLY POWER BY SMPS TAKE UP SMPS (SWITCHING MODE POWER SUPPLY) FOR LOW ELECTRIC POWER AND LOW WEIGHT. - VARIOUS INPUT CONTROL FUNCTION CONTROL THE EACH INPUT CHANNEL LEVEL USING THE SOUND CONTROL VOLUME OF INPUT 1~6.
PUBLIC ADDRESS AMPLIFIER Front Panel 13 12 11 1 10 2 3 9 4 5 6 7 8 1. INPUT 1~6 VOLUME These knobs provide continuous control of the volume of INPUT 1~6. ※ Volumes of USB-MP3 and AUX can be adjusted through input 6 Volume. 2. INPUT SIGNAL LED The SIGNAL LED is lighting by input signal of each channel. 3. MASTER VOLUME This knob provides continuous control of the overall volume of amplifier's output signal. 4.
PUBLIC ADDRESS AMPLIFIER 9. SPEAKER SELECTOR / LED These switches are used to select output to any combination of up to five individual speakers. 10. OUTPUT LEVEL INDICATOR This indicates the main output signal level relative to the rated power output which is marked as 0dB. 11. POWER INDICATOR When the power switch is ON, the indicator will be it. 12. USB-MP3 MODULE 1 2 3 4 5 6 1) USB INPUT TERMINAL It is a terminal connecting USB memory.
PUBLIC ADDRESS AMPLIFIER 3) ■(STOP) BUTTON It is used when stopping during plays. 4) ▶▶/II (PLAY or PAUSE) BUTTON Push it to play and push again to pause. 5) I◀◀,▶▶I(PREVIOUS, NEXT) BUTTON If it is pushed shortly, it skips one song. If it is pushed for 2 seconds, it performs rewind or fast forward. 6) MODE BUTTON If it is pushed shortly, following play modes will be set play one song repeat one song play all repeat all random play ※ If it is pushed for 2 seconds, folder will be moved in orders 13.
PUBLIC ADDRESS AMPLIFIER Rear Panel 13 12 11 10 TEL IN TEL IN VOL MUTE 1 2 3 4 5 67 8 9 1. AC POWER INLET Connect this product to an appropriate AC power source using the supplied Universal AC Power Cord. 2. EXT CHIME TERMINAL When these two terminals are shorted, the four-tone chime circuitry is activated. 3. EXT MUTE TERMINAL When these two terminal are shorted, the output signal is blocked and the protection indicator on the front panel is turned on. 4.
PUBLIC ADDRESS AMPLIFIER 6. TEL IN VOLUME It is a volume which controls the volume of TEL IN. Adjust the volume for your preference. 7. TEL IN MUTE VOLUME This is able to control the mute level of all other input signal except AMP IN when the signal is inputted from the TEL IN terminal. 8.
PUBLIC ADDRESS AMPLIFIER Connecting Speakers Before connecting speakers to your MA-206U/212U/224U unit, be sure to disconnect the AC power cable. Make certain that the total impedance is not less than the rated impedance indicated. For 4Ω low impedance speakers, connect in parallel, with the positive (+) connectors to the 4Ω terminal and the negative (-) connectors to the COM terminal. For high impedance systems, connect with matching transformer as the following Figure.
PUBLIC ADDRESS AMPLIFIER Applications 10 MA-206U/212U/224U
PUBLIC ADDRESS AMPLIFIER Block Diagram MA-206U/212U/224U 11
PUBLIC ADDRESS AMPLIFIER Specifications Rated Output (RMS) MA-206U MA-212U MA-224U 60W 120W 240W Frequency Response (SP OUT/1W output) 80Hz - 15kHz Total Harmonic Distortion (T.H.D @ Rated output, 1kHz) Less than 0.5% Signal to Noise Ratio (S/N @ Rated output) Better than 78dB Graphic Equalizer (100Hz,330Hz,1kHz,3.
PUBLIC ADDRESS AMPLIFIER 328 * Dimensions 88 420 MA-206U/212U/224U 3 13
PUBLIC ADDRESS AMPLIFIER Service Procedures Take steps to insure the problem is not related to operator error or other products within the system. Information provided in the troubleshooting portion of this manual may help with this process. Once it is certain that the problem is related to the product contact your warranty provider as described in the warranty section of this manual. Schematic A Schematic is available by contacting your warranty provider.
PUBLIC ADDRESS POWER AMPLIFIER MA-224 3
NOTE 2 CD-6208
CD-6208 3
Inter-M, Ltd. (Korea) began operations in 1983. Since then, Inter-M has grown to become one of the largest manufacturers of professional audio and commercial sound electronics equipment in the world. Inter-M has gained worldwide recognition for its own branded products, as well as private label manufacturing of electronics sold under other names (OEM).
