Apart MA246MR Handleiding
Lees hieronder de 📖 handleiding in het Nederlandse voor Apart MA246MR (20 pagina's) in de categorie Receiver. Deze handleiding was nuttig voor 48 personen en werd door 2 gebruikers gemiddeld met 4.5 sterren beoordeeld
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The MA246 sets a new standard as a professional 6 zone PA mixing amplier/preamplier for
commercial and industrial applications, either as a standalone unit or as the central device in an
expandable, simple but clever paging system. The amplier 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.
The emergency/telephone input has the highest priority and is activated by switch or vox circuitry. Its
signal goes directly to the main amplier, bypassing any level control accessible at the front of the
unit, and an attenuator next to the input sets its level. Microphone input 1 has the second priority level,
followed by the mic 2, 3 and 4 and nally the line signals (music).
Zones 2 to 6 can be individually volume controlled using the integrated speaker volume controls.
Please note that zones number 5 and 6 are 70 volt outputs, these are compatible with 100 volt
speakers, but by nature, these outputs will have a slightly reduced output level, meant for the ‘quiet’
zones in a multizone system. For even more exibility, zone 1 is an independent zone, with a separate
line level output, which turns the MA246 into a true 2 zone mixing amp with integrated preamp. During
paging, the corresponding integrated volume control will be automatically bypassed. When any priority
has been activated, integrated 24VDC supply output (max 0.6A) can activate priority relays of loud-
speaker attenuators or other devices. Even an emergency 24 VDC supply input is present on the unit.
The supply will automatically keep the amplier powered when mains power is interrupted.
Mic input 1 is optimized to be used with our MICPAT-6, a selective paging station 6 zone microphone.
This mic is the master mic. Maximum 5 of these mics can be switched in parallel on this single input !
Mic input 2 - 4 are designed to be used with our MICPAT-2 (2 zone groups) microphone or any other
microphone denpending on the application. On the MA246 unit you can preset 2 paging groups to be
paged with mic 2 – 4. Please note that it is not possible to connect multiple MICPAT-2 mics on the same
input.
That’s not all. If you are a professional installer, you will appreciate the possibility to use an external
amplier as paging amp. Why ? Suppose zones 2 and 3 should not receive paging messages, meaning
there should always be background music. Then you can use an external amp for all paging tasks.
MA246 does all the switching and thinking for you. The internal amp will be used for background music.
When a paging message is sent to other zones than zone 2 and 3, zone 2 and 3 will stay connected to
the internal amplier and will continue to enjoy the music. All other zones will hear the paging message:
the MA246 will disconnect these zones from the internal amp and will send the paging signal to the ex-
ternal amp. The external amp will feed the signal to the selected zones via the MA246. When paging is
nished, the zones will automatically be switched back to the internal amp. We will show an example of
such application in this manual. We will use a 2 channel PA2240BP amp and a MA246 in an application
that would normally use at least twice as much units to do all the switching and signal routing.
A unique new switching circuit design has been applied to ensure trouble-free switching during many
years.
Removable 19” brackets are shipped along with your amplier.
The MA246 complies with the CE standards.
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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. Zone 3 paging led: this led lights up when zone 3 is being paged.
7. Zone 3 level control: this control is used to preset the zone 3 level in relation to the other zones.
8. Zone 4 paging led: this led lights up when zone 4 is being paged.
9. Zone 4 level control: this control is used to preset the zone 4 level in relation to the other zones.
10. Zone 5 paging led: this led lights up when zone 5 is being paged.
11. Zone 5 level control: this control is used to preset the zone 5 level in relation to the other zones.
12. Zone 6 paging led: this led lights up when zone 6 is being paged.
13. Zone 6 level control: this control is used to preset the zone 6 level in relation to the other zones.
14. Level indicators/clip-limit: The protect led lights up during startup during a few seconds, or when an
error occurs, such as overheating or overload. The lower green LED will light to indicate that power
is present. The signal led indicates that a strong signal is sent to the power amp. To work within
normal conditions the volume indicator should be kept under 0dB (100%). At -2,5dB a limiter will be
activated. This red LED indicates that the “auto gain circuit” keeps the level below clipping. This is
NOT a clip indicator, but an indication of the “automatic gain control”. Set your max levels so that
the limiter led never lights up !
15. Zone 2 – 6 music selector: selects the line level input for zones 2 - 6.
16. Music bass tone control
17. Music treble tone control
18. Music level control: turn this level knob to adjust the music level relative to the microphone signals.
19. Music muted by priority led: this red led lights up when the music is muted by any priority signal or
priority contact. When this led lights up, there is 24 VDC/0.6A available on the rear connector.
20. Mic/Line 2 level control: turn this knob to adjust the mic/line 2 level relative to other signals.
21. Mic/Line 3 level control: turn this knob to adjust the mic/line 3 level relative to other signals.
22. Mic/Line 4 level control: turn this knob to adjust the mic/line 4 level relative to other signals.
23. Master level control: turn this knob to set the global level in zones 2 – 6.
24. Power switch : switch mains power on and off. This switch turns off the amplier when connected to
the mains AC supply. Please note that this switch does not switch the amp off when operating from
a 24 VDC emergency power supply.
Product specificaties
| Merk: | Apart |
| Categorie: | Receiver |
| Model: | MA246MR |
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