User manual PYRAMID PM-4800 SFX

[. . . ] The indicator will also be illuminated when the amplifier has abnormal problems, such as overload or excessive heat. 8. Left and Right Output Level Controls Lets you adjust the sound levels for each channel. In the mono bridged mode (PA1000X/PA1800X), only the left gain control will adjust the output level. REAR PANEL - PA600X e q 3 9 REAR PANEL - PM-4800 SFX / PA1000X / PA1800X r e w q 9 t REAR PANEL - PA600X / PM-4800 SFX / PA1000X / PA1800X 9. Voltage Switch 0 The amplifier has selectable input voltage from 110V/60Hz which is the standard in USA and CANADA. You can also switch the input voltage to 220V/50Hz for EUROPEAN operation. Please make sure the switch is in the proper position before operating, otherwise severe damage will result not cover by the warranty. [. . . ] 400W) which allow the electrical hook up of other units. 11. Speaker Terminals Permits hook up of two stereo pair of speakers via the wire terminals. You can choose either Channel A , Channel B, or use both at the same time. Speaker impedance can range from 4 to 16 Ohms. 12. Fan Cooling (PM-4800 SFX/PA1000X/PA1800X) Cooling system is automatically activated whenever amplifier is turned on. This forced air cooling system rapidly exhausts interior heat, reducing operating temperature and aiding performance. 13. Input Jacks Let you connect a variety of audio input sources via the balanced 6. 35mm phone jack or unbalanced RCA inputs. 14. Stereo/Mono Switch (PA1000X/PA1800X) Lets you select bridged mono input mode in combination with a mono signal source plugged into the LEFT input channel, or conventional stereo operation with a stereo input signal. 15. Mono Bridged Output (PA1000X/PA1800X) Connect the speaker's positive (+) to the amplifier's LEFT/RED (+) terminal and negative (-) to the amplifeir's RIGHT/RED (+) terminal. 4 INSTALLATION GUIDELINES Connecting the GND (GROUND) screw terminal Connecting a mixer or preamplifier may cause excessive noise or hum in the amplifier output. To prevent this, connect one end of a low-capacitance shield wire to the amplifier's ground screw (on the rear panel). Then connect the other end of this wire to the ground terminal on the mixer or preamplifier enclosure. Stereo or Mono Inputs (PA1000X/PA1800X) The PA1000X and PA1800X can be operated in Stereo or Mono mode, depending on the input source. If the input signal is mono, connect the source via the LEFT input only (also marked "MONO" on the back of amplifier). Then slide the STEREO/MONO selector switch to MONO and the signal will be routed through both channels. MONO SIGNAL SOURCE EQ OR MIXER STEREO/MONO SWITCH IN "MONO" POSITION LOW CAPACITANCE SHIELD WIRE Speaker connections GROUND SCREW Input connections These amplifiers accept a board range of input sources, including Compact Disc (CD) players; Cassette, Reelto-Reel or other tape players; Radio Tuners; Equalizers; Signal Processors. Connecting a CD or tape player, or tuner In a normal installation, one would use the RCA JACKS for connecting a CD player, tape player or tuner. You can connect 4 Ohm, 8 Ohm, or 16 Ohm speakers to Channel A and/or Channel B of the amplifier. If you connect two pairs of speakers, be sure to follow these guidelines: · Speakers which are connected to the same channel are part of a pair, and must be of the same impedance. · Speakers connected to different channels are NOT part of a pair, and can be of different impedances. To get the best performance with the leaset sound distortion, always adjust the output level gain so the meter's level indication does not continuously exceed to the extreme right. CAUTION: It is possible to overdrive the amplifier by setting output level gain too high, which may cause damage or failure. Using headphones To listen privately, or to monitor sound sources, connect a pair of low impedance stereo headphones (not supplied) with 6. 35mm plug into the PHONES jack on the amplifier front panel. Follow these recommendations: Do not listen at extremely high volume levels. Extended, high-volume listening can lead to permanent hearing loss. Always start with the volume control set to a LOW level BEFORE you put the headphones on. Then gradually increase the volume as necessary. About the internal clip circuitry Special clip circuitry incorporated into your amplifier's design protects the amplifier and speaker system from being damaged from overdriving power. Under normal conditions, the amplifier's clip indicator will flicker as the output power momentarily exceeds the level as set by the output level gain selector. However, under excessive output conditions, the clip indicator lights remain on continuously, altering you that the special clip circuitry has become active. When this occurs, you should simply reduce the output power level by rotating the Master Volume control counterclockwise. Connecting to standard AC power After making all other connections, set the POWER switch to OFF position. Then connect the power cord to a standard AC outlet. Mounting the amplifier This amplifier is designed to accept standard rack mounting installations. [. . . ] Then connect the power cord to a standard AC outlet. Mounting the amplifier This amplifier is designed to accept standard rack mounting installations. Two slots on each end of the front panel make it suitable for such an installation. Tightly secure four mounting screws (not supplied) through these four slots and into your standard electronics equipment rack. 6 Using the A/B Speaker Selector Switch You can listen to speakers on set A or set B individually or simultaneously. Simply push in or out the desired speaker set to make your selection. CAUTION: If the impedance of your speakers is 4 OHMS, do not use both the speaker A and speaker B terminal at the same time as the net impedance may be low enough to damage your amplifier. Replacing a fuse This amplifier requires a fuse with the proper rating for protection from power surges and short circuits. [. . . ]