MANUAL MA246/R/MR INFO@APART-AUDIO.
Main features The MA246 sets a new standard as a professional 6 zone PA mixing amplifier/preamplifier for commercial and industrial applications, either as a standalone unit or as the central device in an expandable, simple but clever paging system. The amplifier is equipped with 4 balanced mic/line inputs, each with adjustable gain and tone controls and up to 4 line level inputs and an emergency input. The MA246 has a six level priority system.
Front panel 1 2 3 15 16 17 4 5 6 18 19 20 7 8 21 9 10 11 12 13 14 22 23 24 1. Zone 1 output level: this level control sets the output level to the zone 1 preamp output. 2. Zone 1 paging led: this led lights up when zone 1 is being paged. 3. Zone 1 music selector: selects the line level input for zone 1. 4. Zone 2 paging led: this led lights up when zone 2 is being paged. 5. Zone 2 level control: this control is used to preset the zone 2 level in relation to the other zones. 6.
Important information Zone 2 - 6 level controls are used to preset levels in different zones relative to each other and to switch off certain zones temporarily. Zone 5 and 6 outputs are 70 volts speaker line level outputs, these are fully compatible with 100 volt speakers but will produce a maximum output level about 3 dB lower than normal 100 volt lines. Use these outputs in the most silent zones.
Rear panel 2 1 18 4 3 6 5 7 8 9 10 11 12 19 20 21 22 23 24 25 26 27 28 13 14 29 30 15 31 16 32 33 17 1.Loudspeaker output connector zone 6 : zone 6 is a 70 volt speaker line output compatible with 100 volt speaker lines. Com = speaker ground, 70 V = speaker plus connection. If this zone is selected for paging, it will become a normal 100 volt line. Use this output for your ‘silent’ zones. 2.
8. Emergency input level : this is the only level control on the emergency input. The emergency signal bypasses all possible level controls in the MA246 unit. 9. Chime level: turn this knob to activate the two tone chime. The chime is activated by the priority switches from mic/line 1 – 4. Please note that the emergency input switch or vox circuitry does not activate the chime. 10.
21. Direct speaker outputs : This is the direct amplifier output, available in 100V, 70V and low impedance. For normal operation, leave the 100V wire bridge between ‘22’ and ‘23’ in place. The wire bridge connects the internal amp’s output to the integrated volume control and speaker switching circuitry. 22. External paging amp in: connect the 100V output from an external 500 Watt max paging amp here. This is usefull in situations where you want to separate certain zones from each other, e.g.
Microphone connections Status dipswitches: set to * when using a microphone with a push button(s) connected to the paging contact(s). Set to mix when you want the speech to be mixed with the music: this is usefull for mics without pushbuttons or switches. Phantom power: set to on if your microphone needs phantom power (such as condenser mics). Voltage supplied is 18 VDC. Signal input: balanced input on euroblock. This connector accepts balanced and unbalanced mic/line signals.
Priority levels Paging switch connector: for selecting paging in zone 1 or zone 2 group. MIC1 will always override the zone group preselection. Paging group 1: connect GND to PG1 using a switch. Do not apply external voltages to these contacts. Paging group 2: connect GND to PG2 using a switch. Do not apply external voltages to these contacts. Note: MICPAT-2 is equipped with 2 switches for paging 2 zone groups and can be connected to the euroblock connector.
Speaker ZONE connections Zone 1 amplifier connection (e.g. 480 watts in zone 1): Connect the signal output zone 1 (balanced, on euroblock) to the external amplifier’s signal input, e.g. our PA2240BP in bridge mode, providing 480 watts into 100 volt. Zone 1 has independent line source selection and volume control. The benefit of the 70 volt and 100 volt output zones : The 70 volt outputs from zone 5 and 6 are fully compatible with 100 volt speakers.
240watts power amp: In this configuration, zone1 selected sources will always be amplified by the PA2240BP channel 2 amplifier. Zone 2-6 selected music sources will be amplified by the MA246 internal power amplifier. During paging, the zones that must hear the paging messages are automatically disconnected from the MA246 internal amplifier and will be switched to the PA2240BP channel 1 amplifier. The internal MA246 power amplifier will continue to play the music in the non-paged zones.
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MA246R 3 15 Difference in MA246R front panel controls: Music selector 3 and 15 have 3 aux source inputs + internal tuner (MA246 has 4 aux source inputs). On the left side of the front panel you will find a digital tuner. Operation of the tuner will be explained later. 26 34 Difference in MA246R rear panel layout: Aux 4 mono input (26) has been replaced by a rec out output bus. Antenna connector (34) for AM wire antenna and FM antenna coax connector.
MA246MR 3 15 Music selector 3 and 15 have 2 aux source inputs + internal tuner and CD/MP3 section (MA246 has 4 aux source inputs). On the left side of the front panel you will find a digital tuner and the CD/MP3 player. Operation of the tuner and CD/MP3 player will be explained later. 26 34 Difference in MA246MR rear panel layout: Aux 3 & 4 mono input (26) have been replaced by a rec out and tuner output bus. Antenna connector (34) for AM wire antenna and FM antenna coax connector.
Tuner operation 1 7 2 3 4 5 6 8 9 10 11 12 1. Display section: shows various tuner parameters such as frequency band (FM or AM), selected frequency and preset number. The tuner has 10 AM and 10 FM preset memory locations. 2. FM/AM selector: press to switch between FM or AM band. 3. Scan down: press shortly to scroll one step down in the frequency band (9 kHz AM, 50 or 100 kHz FM). Press for about a second to search for the next radio station down the frequency band. 4.
CD/MP3 operation 1 9 10 11 2 3 4 5 6 7 8 12 13 14 15 16 17 1. Display section: shows various parameters such as track number, folder number (if present), elepased track time, CD mode, MP3 mode… 2. CD slot: insert the CD carefully in this CD slot. Do not apply force, you might damage the loading mechanism. If the unit refuses to accept a CD, press the stop/eject button repeatedly to reset the loading mechanism. 3.
step. Select another folder/track and press shuffle to confirm the program step. When you press shuffle twice, the selected track will be played twice… After programming all steps, press play to start playing the program. In order to clear the program, press program or stop to clear the program steps. Programs can not be stored or recalled. 14. Mute button: press once to mute the CD/MP3, press again to unmute. 15. Play/pauze: press to start playback, press again to pauze playback. 16.
Technical Specifications SPECS MA246 ‐ MA246R ‐ MA246MR GENERAL SPECS !utput power ra+ng RMS Frequency response 100 volt out Total harmonic distor+on Frequency response line output zone 1 Bass tone control zone 2‐6 Treble tone control zone 2‐6 Tone control mic/line 1‐4 S/N ra+o (20Hz‐20kHz) Indicator leds Zone controls Source controls Power supply Mains fuse ra+ng Emergency supply fuse Priority output fuse Weight net MA246 ‐ MA246R ‐ MA246MR Shipping weight MA246 ‐ MA246R ‐ MA246MR Dimensions Shipping di
EMERGENCY INPUT transformer coupled balanced input on euroblock Sensi&vity Impedance S/N Frequency response Mu&ng AUX 1 ‐ 2 unbalanced stereo input on RCA Sensi&vity Impedance S/N Frequency response AUX 3 ‐ 4 unbalanced mono input on RCA Sensi&vity Impedance S/N Frequency response 1V 600 ohm >80dB 100Hz ‐ 20 kHz (+1/‐3dB) Ac&vated by contact or vox (selectable inside the unit) Emergency has highest priority and mutes all other inputs by more than 40 dB.
Safety Instructions • Please check the carton box for any kind of damage on reception of the goods. In case of a damaged carton, please contact your dealer before opening the carton. • !!!! Danger !!!! Exposure to extremely high noise levels may cause a permanent hearing loss. Individuals vary considerably to noise induced hearing loss but nearly everyone will lose some hearing if exposed to sufficiently intense noise for a sufficient amount of time.