APART MA247 series, Manual

Page: 5 / 24

Important information
0LF/LQHOHYHOFRQWUROWXUQWKLVNQREWRDGMXVWWKHPLFOLQHOHYHOUHODWLYHWRRWKHUVLJQDOV
0LF/LQHOHYHOFRQWUROWXUQWKLVNQREWRDGMXVWWKHPLFOLQHOHYHOUHODWLYHWRRWKHUVLJQDOV
0LF/LQHOHYHOFRQWUROWXUQWKLVNQREWRDGMXVWWKHPLFOLQHOHYHOUHODWLYHWRRWKHUVLJQDOV
0DVWHUOHYHOFRQWUROWXUQWKLVNQREWRVHWWKHJOREDOPL[OHYHOLQ]RQHV²7KLVFRQWUROZLOOEH
bypassed when the emergency input is activated.
3RZHUVZLWFKVZLWFKPDLQVSRZHURQDQGRII7KLVVZLWFKWXUQVRIIWKHDPSOLILHUZKHQFRQQHFWHGWRWKH
mains AC supply. Please note that this switch does not switch the amplifier off when operating from a
9'&HPHUJHQF\SRZHUVXSSO\
‡=RQHOHYHOFRQWUROVDUHXVHGWRSUHVHWOHYHOVLQGLIIHUHQW]RQHVUHODWLYHWRWKHPDVWHUOHYHODQGWR
VZLWFKRIIFHUWDLQ]RQHVWHPSRUDULO\=RQHDQGRXWSXWVDUHYROWRXWSXWVWKHVHDUHIXOO\
FRPSDWLEOHZLWKYROWVSHDNHUVEXWZLOOSURGXFHDPD[LPXPRXWSXWOHYHODERXWG%ORZHUWKDQ
QRUPDOYROWOLQHV8VHWKHVHRXWSXWVLQWKHPRVWVLOHQW]RQHV:KHQXVLQJDQH[WHUQDOSDJLQJ
DPSOLILHUDOOVSHDNHURXWSXWVIURPWKHVHOHFWHG]RQHVDUHVZLWFKHGWRPD[LPXPYROXPHYROW
GXULQJSDJLQJ,QRWKHUZRUGVWKH]RQHYROXPHFRQWUROVIURP]RQHDUHE\SDVVHGGXULQJSDJLQJ
‡$PD[LPXPRIZDWWVVSHDNHUORDGLVDOORZHGSHU]RQHZLWKDWRWDOPD[LPXPRIZDWWVIRUDOO
]RQHVZKHQXVLQJWKHLQWHUQDO0$SRZHUDPSOLILHURQO\'RQRWRYHUORDGWKHDPSOLILHU
If the amplifier is overloaded, it will result in overheating. Check your total speaker load with an
LPSHGDQFHRUZDWWPHWHUEHIRUHRSHUDWLQJWKHDPSOLILHU0LQLPXPWRWDOVSHDNHULPSHGDQFHDOO]RQHV
FRPELQHGLVFDOFXODWHGOLNHWKLV9[9: RKPV3OHDVHQRWHWKDWLPSHGDQFH
FDQ127EHPHDVXUHGZLWKDQRUPDOPXOWLPHWHU\RXQHHGDVSHFLDOLPSHGDQFHPHWHURUYROWOLQH
wattmeter for this purpose. If you need more speakers and/or more power, then you should use an
H[WHUQDOSRZHUDPSOLILHU7KH0$KDVDQLQGHSHQGHQWSUHDPSOLILHUFLUFXLWIRU]RQHDQGD
FRPELQHGSUHRXWDPSLQFRQQHFWRUIRUDOORWKHU]RQHVDOORZLQJ\RXWRLQFUHDVHWKHWRWDORXWSXWSRZHU
without the need of a supplementary preamplifier.
‡3OHDVHQRWHWKDWLQVRPHFDVHVWKHPXVLFOHYHOLQQRQSDJHDEOH]RQHVFDQVOLJKWO\YDU\GXULQJSDJLQJ
When you use an external paging amplifier, the internal power amplifier will ‘see’ fewer speakers at its
output, because these speakers are switched to the external amplifier’s output during paging. This can
result in music levels varying, depending on the speaker load variation. This is not a malfunction. This
effect will increase depending on the speaker load variation. You can avoid such situations by powering
WKHVHQVLWLYH]RQHVZLWKDQH[WHUQDODPSOLILHUFRQQHFWHGWR]RQHOLQHOHYHORXWSXW