AMI NGX MINI 2 - Extension Speaker Operation; Selecting Speaker Power

NGX Mini 2 Jukebox 15 22022623 Rev B
Table 1-1 – Extension Speaker Worksheet
Sheet 1
Extension Speakers Connected to Amplifier Channel + and – terminals
Place the quantity of speakers in the blank under Qty and multiply the quantity times the power consumption. Place
your results in the blank under Total.
Qty Total
CH 1 CH 2 CH 1 CH 2
Two 8-ohm speakers in series:
(30 watts to each speaker)
______ ______ at 60 watts per series = ______ ______ watts
Two 4-ohm speakers in series:
(60 watts to each speaker)
______ ______ at 120 watts per series = ______ ______ watts
8-ohm speakers: ______ ______ at 120 watts each = ______ ______ watts
4-ohm speakers: ______ ______ at 240 watts each = ______ ______ watts
Total Load, sum Total columns for CH1 and CH2 ______ ______ watts
Amplifier Overload Check
Check that the amplifier is not overloaded by performing the following steps:
1. Make sure that the extension speakers are connected to the amplifier terminals properly (Channel1 + – and
Channel 2 + –).
2. If the red OVERLOAD LED is always lit, the amplifier is overloaded and will shut down. You must perform
Step 3.
3. Do this step only if the OVERLOAD LED came on as described in Step 2.
• Find the source of the overload (shorted speaker wires, shorted speaker, too many speakers
connected).
• After you fix the short, disconnect a few speakers to reduce the wattage. Repeat Step 2.
• If no overload is detected, reconnect the disconnected speakers (ensure you do not have too many
speakers, use Table 1-1). Repeat step 2.