ACT-18X SUBWOOFER FEATURES AND USAGE
Numbers in this section refer to the numbered controls opposite
1)LEVEL CONTROL: Sets the volume of the subwoofer without influencing the volume of the satellites the satellites, or the full range outputs on the panel mounted XLR connectors.
2)PHASE SWITCH: Allows the user to reverse the direction of excursion at low frequencies. This is to help in getting the subwoofer to move in proper “PHASE” with the satellites, so that the sound in the crossover region from the satellite and subwoofer add instead of subtract.
3)POWER INDICATOR: The AC Mains Power rocker switch located on the lower left hand side of the amplifier turns on the AC mains power to the amp. A failure to light the Red rocker switch indicates lack of power and/or a blown AC mains fuse.
4)PROTECTION: This Red LED turns on when there is a fault condition in the system causing circuitry to engage in order to protect the amplifier and prevent it from damaging itself and/or the attached speaker(s). The most common cause of this is running the amplifier at or near its maximum output level for a very long time. This WILL CAUSE overheating. If protection is engaged because of overheat- ing, the best course of action is to turn down the level control on the amplifier for long enough
5)RIGHT & LEFT INPUTS: These XLR connectors accept a balanced input signal cable. The wiring conforms to the Audio Engineering Society standard where Pin 2 is (+) or hot; Pin 3 is
stereo image in using a single speaker to reproduce the bass from both channels.
XLR CONNECTIONS
6)RIGHT & LEFT
nal. Therefore you do not need to | When connecting a balanced signal ensure it is wired as | |||
system nearby your ACT subwoofer. Use this connector to “daisy chain” multiple systems together. | per AES (Audio Engineering Society) specifications. | |||
(See diagram on page 7 for details) |
|
| XLR | |
7) RIGHT & LEFT |
|
| ||
Hot (+) |
| Pin 2 | ||
fication for the full range or | Cold |
| Pin 3 | |
woofer. In other words, it is what is left of the music after the bass has been removed. It is that part of the music which the subwoofer |
| |||
does NOT reproduce. It should be sent to your active satellite speakers INSTEAD of the full range signal. When the very lowest bass | Ground |
| Pin 1 | |
frequencies are removed from the satellites, this will increase your dynamic range, (let you play it louder) lower your distortion, and |
|
|
|
|
improve the sound of the system relative to what you would hear with the full range signal sent to your high frequency satellites. (See |
| SHIELD | HOT | 2 |
diagram on page 6 for details) |
|
| ||
|
|
|
| |
8) EXTERNAL SPEAKER ON/OFF SWITCH: When using the powered |
|
|
|
|
this switch should be in the off position. IF IT IS NOT, THAT WILL REDUCE THE AVAILABLE POWER TO THE SINGLE | KEY | COLD |
| 1 |
When an external, | HOT |
| 3 | |
the volume control is all the way down (fully | COLD | SHIELD | 1 | |
| GROUND | |||
9) EXTERNAL SPEAKER OUTPUT: This |
|
|
|
|
18X amplifier. Either pins 1+ and 2+ can be used as the positive connection. Either pins 1- or 2- can be used as the Negative |
|
|
|
|
Connection. Only connect an |
|
|
| 2 |
ranty and may cause your amplifier to shutdown or fail. When adding subwoofers it is important that they have the same response |
|
|
| |
(magnitude and phase) or one will likely subtract its output from the other (instead of adding) at some point within the range of both. |
| COLD HOT 3 | ||
|
|
|
| |
10) ON/OFF SWITCH: Turns on the AC mains power and your |
|
| SHIELD | |
|
| COLD | ||
erly, the Power ON/OFF switch will light up. If it does not, unplug the AC cable from the wall and then check the AC mains fuse in your |
|
| ||
|
| HOT | ||
|
| |||
|
|
|
| |
replacement fuse blows in short order, seek service from a qualified technician. |
|
|
|
|
11)FUSE HOLDER: Houses a 12 Amp 3AB size glass
12)POWER CORD CONNECTOR: For attachment of the included IEC standard detachable power cord. Please replace this cord should it become chafed, cut, bent or damaged in such a way that the pro- tective insulation is compromised. TOUCHING LIVE EXPOSED WIRES ON THE POWER CORD CAN RESULT IN INJURY OR DEATH! Only replace the cable with the exact same type and size.
4