
It is recommended that a
stiff supply of AC power be
used because the amplifier
places high current demands
on the AC line. The more power that is available on the line, the louder the amplifier will play and the more peak output power will be available for cleaner, punchier bass. A suspected problem of “poor bass perfor- mance” is often caused by a weak AC supply to the amplifier.
The M•2600 has an
The majority of AC outlets encountered in homes and clubs (in the U.S.) are served by a 240VAC
In order to minimize ground loops, the safety grounds for all the outlets should be connected to a common (“star”) grounding point, and the distance between the outlets and the common grounding point should be as short as possible.
If lighting is used in a show, it is preferable to power the lights from one leg of the service, and power the audio equipment from the other leg. This will help minimize noise from the lights coupling into the audio (particularly if SCRs are used).
When setting up for a show, oftentimes you are plugging into an AC power distribution system you know nothing about. You may even be faced with
HIGH VOLTAGE POWER LINE
| 120V |
| |
PRIMARY | 240V | SECONDARY | |
WINDING | WINDING | ||
| |||
| 120V |
|
Use a
If you want to roll your own, refer to the “Connectors” section in Appendix B.
OUTPUT WIRINGUse heavy gauge, CLASS 1, stranded wire for connecting speakers to the M•2600 amplifier’s SPEAKER OUTPUT terminals. As the distance between the amplifier and the speakers increases, the thickness of the wire should also increase. Speaker wire has resis- tance, and when electricity passes through a resistor, power is lost. The thicker the wire, the less resistance it offers and the more power actually gets to the speakers.
The wire thickness is rated in gauges. Use the chart below to determine the correct gauge of wire to use according to the distance between the speakers and the amplifier, and the impedance of the load the amplifier is driving. This ensures that the power lost across the speaker wire is less than 0.5 dB.
| Load | Gauge of |
Wire Length | Impedance | Wire |
Up to 25 ft. | 2Ω | 14 gauge |
| 4Ω | 14 gauge |
| 8Ω | 14 gauge |
Up to 40 ft. | 2Ω | 12 gauge |
| 4Ω | 12 gauge |
| 8Ω | 14 gauge |
Up to 60 ft. | 2Ω | 10 gauge |
| 4Ω | 12 gauge |
| 8Ω | 14 gauge |
Up to 100 ft. | 2Ω | 8 gauge |
| 4Ω | 10 gauge |
| 8Ω | 14 gauge |
Up to 150 ft. | 2Ω | 6 gauge |
| 4Ω | 8 gauge |
| 8Ω | 12 gauge |
Up to 250 ft. | 2Ω | 4 gauge |
| 4Ω | 6 gauge |
| 8Ω | 10 gauge |
|
|
|
TRANSFORMER | EARTH |
240V | GROUND |
(NEUTRAL) |
30