AMI Entertainment Rock-Star Lx, Инструкция по установке и эксплуатации

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Page 20
Connecting Speakers to an Audio Transformer
Determining which tap(s) of the Audio Transformer to
use may be accomplished two ways: impedance
matching, or distributing power.
In the case of impedance matching , calculate the
impedance load for each channel, and then connect
to the appropriate tap. To calculate the load
(assuming like-impedance speakers are connected in
parallel) divide the number of speakers into the Ohms
value of one speaker. For instance, if you have two 8-
Ohm speakers per channel, the impedance is 4
Ohms. (2 divided into 8 equals 4.) Once the
impedance is calculated, connect the extension
speakers to the tap that is equal to or lower in value
than the calculated impedance. In this case, you will
connect to the T7 tap. Note: When using impedance
matching, only one transformer tap may be used. If
you wish to use multiple taps, you must use the
power distributing method.
If distributing power , simply add the amount of
power consumed for each connected speaker and
make sure the total is 450 Watts or less. For
example, 3 MTX® speakers connected to T7 will
result in a power consumption of 450 Watts. If a 4
th
MTX speaker is connected to any other tap of that
channel, it will result in an overload because the
maximum amplifier power is already being used.
Connect speakers to a lower tap.
The chart below shows the number of speakers that
may be connected to a particular tap of the Audio
Distribution Transformer, along with the amount of
power each speaker may consume when connected
to that tap. It also indicates the minimum impedance
for each tap.
IMPORTANT:
The Amplifier will automatically limit if
there is an overload. If the red DDT LEDs on the front
of the amplifier are illuminated most of the time, then
an overload condition exists and must be corrected.
Turn down the gain controls on the front of the
amplifier, or limit the maximum volume in the
operator console, until the DDT LEDs are out or until
they just flash briefly with music peaks. Operating the
unit with the DDT LEDs fully lit may result in an
overheat condition, which may damage the amplifier
and/or the speakers.
*WARNING : Connecting more than the indicated
maximum number of speakers to a particular
transformer tap will result in an overload, which
will likely damage the amplifier and void its
warranty.
Number of Speakers / Power (Wrms) per Speaker per Tap*
Transformer
Tap
Spkr(s) connected
T1 to Tx
Allowable # of Peavey
®
PR or Other 8-Ohm
System @ Power
Consumed
Allowable # of
MTX
®
, Bose
®
or
Other 6-Ohm System
@ Power Consumed
Allowable # of Peavey
®
652S or Other 4-Ohm
System @ Power
Consumed
Minimum
Impedance
T7 1 to 4 @ 112W ea 1 to 3 @ 150W ea 1 to 2 @ 225W ea 2 Ohms
T6 1 to 8 @ 56W ea 1 to 6 @ 75W ea 1 to 4 @ 112W ea
1 Ohm
T5 1 to 16 @ 28W ea 1 to 12 @ 37W ea 1 to 8 @ 56W ea 0.5 Ohms
T4 1 to 32 @ 14W ea 1 to 24 @ 19W ea 1 to 16 @ 28W ea 0.25 Ohms
T3 1 to 64 @ 7W ea 1 to 48 @ 9W ea 1 to 32 @ 14W ea
0.13 Ohms
NOTE: Be sure the speakers you use match the power rating for the tap to which they are connected.
For instance, 8-Ohm speakers connected to T7 must be able to handle 112 watts.