MA246-MR - Audio Amplifier APART - Free user manual and instructions

USER MANUAL MA246-MR APART

APart introduces the MA246: an amplifier that brings a new dimension to 100 V zone mixing amplifiers. This 6-zone unit can be used stand-alone, or as the core of an expandable sound system.

Because the MA246 offers independent source selection for zones 1 and 2-6, it can be used as a multi-source zoning system. Zone 1 is a fully independent pre-amplified zone and allows the installer to use an external power amplifier to amplify it. It is especially useful for large areas that require many speakers, like factory production areas. This has the particular advantage that the installer can use the external amplifier to suit his power needs for that particular zone.

Zones 2 to 6 can be individually volume controlled using the integrated speaker volume controls. 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 multi-zone system.

MA246 has four balanced inputs on Euroblock. Microphone input 1 is optimized to be used with our MICPAT-6, a selective 6-zone paging microphone, designed especially for use with the MA246. This microphone is the master microphone. Maximum five of these microphones can be switched in parallel on this single input!

Microphone inputs 2 - 4 are designed to be used with our MICPAT-2 (2 zone groups) microphone or any other microphone depending on the application. On the MA246, you can preset 2 paging groups to be paged with mic 2 - 4.

Further the MA246 is equipped with 4 line inputs that can be selected via a rotary switch. As said before, Zone 1 can have a different line source selected compared to zones 2 - 6

There are 6 different priority levels on the MA246. When any priority has been activated, integrated 24VDC supply output (max 0.6A) can switch priority relays of loudspeaker attenuators or other devices.

In case of mains power failure, the MA246 can be powered via the 24V DC power input. If an external 24V UPS is connected to the unit, the amplifier will automatically switch to it.

Professional installers will also appreciate the possibility to use an external amplifier as a paging amp. Suppose zones 2 and 3 should not receive paging messages, meaning there should always be background music. In this situation, the installer can use an external amplifier for paging. When a paging call is sent out, zones 2 and 3 will stay connected to the internal amplifier and will continue to receive background music. The other zones will hear the paging message. The MA246 will disconnect these zones from the internal amp and will send the paging message to the external amp. When paging is finished, these zones will be switched back automatically to the internal amp.

When required, it is even possible to use a 2-channel amplifier (e.g. the PA2240BP) as external amplifier, with one channel assigned to power zone 1 of the MA246, while the second channel of the external amplifier is used to power paging messages.

MA246 is available with a built-in tuner (MA246R), with tuner and CD-player + memory stick and SD/MMC slot for audio, MP-3 and WMA playback (MA246MR).

TECHNICAL SPECIFICATIONS

GENERAL SPECS

Output power rating RMS:

Frequency response 100 volt out:

Total harmonic distortion :

Frequency response line output zone 1 :

Bass tone control zone 2-6:

Treble tone control zone 2-6:

Tone control mic/line 1-4:

240 watt

40 - 25 kHz +1/-3dB

<0,3% @ -6dB, 1kHz

20 - 30 kHz +1/-3dB

+8/- 8dB @ 100Hz

+8/-8dB @ 10kHz

from 100Hz / + 3dB 10kHz / - 6dB to

100Hz/-9dB, 10kHz/+4dB

S/N ratio (20Hz-20kHz)

amplifier in:

line in:

mic in:

95dB

80dB

65dB

Indicator LED's

zone paging :

muted by priority :

Limiter activity :

Signal 100% :

Signal -25dB :

Power on :

Protection active :

6 x yellow led

1 x red led

1 x red led

1 x yellow led

1 x green led

1 x green led

1 x red (also lights up during power on)

Zone controls : Individual volume and source selection for zone 1 line output

5 x 100 volt volume controls for zone 2-6

TECHNICAL SPECIFICATIONS

Source controls:

Music selector zone 2-6

Music selector zone 1

music level control zone 2-6

mic/line 2-4 volume control all zones

Master level control zone 2-6

Master level control zone 1

Chime level control (back panel)

Emergency level control (back panel)

Emergency Vox on/off/level control: setting inside the unit

Power supply:

230VAC/50-60Hz MAX 800 VA

Mains fuse rating:

T6,3AL250V (inside mains connector on back panel)

Emergency supply fuse:

T20AL250V (inside the unit)

Priority output fuse:

0,6A resettable autofocus

Dimensions: 430(w) × 88(h) × 360(d) - 2 HE, 19'' brackets included

Operating temperature and humidity: -10 to +45^ up to 90% RH non condensing

OUTPUTS

Zone 1: Line level output, balanced 0 dB on euroblock connector

Zone 2-6 : 100V outputs, zone 5 and 6 are limited to 70V compatible with 100V speakers. MAX240 watt total power in 100V (180 Watts max in 1 zone). Preselectable output levels: 5 steps + off + automatic bypass (priority). Minimum load impedance all zones summed: 41,66 ohms

Zone 2-6 outputs on euroblock connector, amplifier power can be supplied by internal or external amp (selectable with paging mode switch at the back panel)

Separate speaker out:

Rec out (MA246R/MR only):

Tuner out (MA246MR only):

Pre amp out zone 2-6:

Phantom power:

Pre amp out zone1:

50V/70V/100V and low impedance on euroblock 1V

300 mV

1V

18 VDC

1 V balanced on euroblock/100 ohm output impedance

2 V balanced on euroblock/100 ohm output impedance

24VDC, max 0,6A

2 tone chime activated by contact closure

INPUTS

MIC/LINE 1

Sensitivity mic/line:

Impedance:

S/N mic/line:

Phantom power:

Frequency response:

Muting activated by contact:

balanced input on euroblock

variable 3mV to 2V

600 ohm

65dB/>80dB

NA

80Hz - 15 kHz (+1/-3dB) speech eq

mutes inputs with lower priority by more than

40dB

MIC/LINE 2-4 balanced inputs on euroblock

Sensitivity mic/line:

Impedance:

S/N mic/line:

Phantom power:

Frequency response:

Muting activated by contact:

variable 1,5mV to 200mV

600 ohm

65dB/>80dB

18 VDC

80Hz - 15kHz (+1/-3dB) speech eq

>40dB ;priority according to priority table

EMERGENCY INPUT transformer coupled balanced input on euroblock

Sensitivity:

Impedance:

S/N:

Frequency response:

Muting:

1V

600 ohm

80dB

100Hz - 20 kHz (+1/-3dB)

Activated by contact or vox (selectable inside the unit)

Emergency has highest priority and mutes all other inputs by more than 40 dB. The signal is also present on the preamp out,

AUX 1 - 2 unbalanced stereo input on RCA

Sensitivity:

Impedance:

S/N:

Frequency response:

500mV

22 kilo ohm

80dB

40 - 25 kHz +1/-3dB, Signal is internally mixed to mono

AUX 3 - 4 unbalanced mono input on RCA

Sensitivity:

Impedance:

S/N:

Frequency response:

500mV

22 kilo ohm

80dB

40 - 25 kHz +1/-3dB

TUNER (MA246R/MR only)

Tuning range FM band:

Tuning range AM band:

Aerial terminal AM:

Aerial terminal FM:

Sensitivity FM:

S/N FM band:

Sensitivity AM:

Harmonic distortion FM band:

Frequency response FM band:

Number of presets:

87,5 - 108 MHz (100 kHz/50 kHz tuning step)

531 - 1602 kHz (9 kHz tuning step)

AM antenna spring lock terminal

75 ohm coax connector

1 V/75 ohm at 26 dB S/N

74 dB at 40 kHz deviation

40 V (26 dB S/N)

< 0,1% at preamp and tuner output

30 Hz - 15 kHz (+1/-3 dB) at preamp and tuner output

10 FM, 10 AM

CD/MP3/WMA (MA246MR only)

Frequency response:

Harmonic distortion:

20 Hz - 20 kHz (+0/-1 dB) at preamp output

< 0,01% at preamp output

Supported file types CD/CDR: PCM 16 bit/44,1 kHz, MP3 32 - 320 kbps, variable bit rate

Supported file types USB/CARD: MP3 32 - 320 kbps, variable bit rate, WMA

File system/capacity USB/CARD: FAT32 up to 32 gigabyte