SWR SM-500 Instrucciones De Funcionamiento página 12

Make sure the AC cord is plugged in all the way in both the amp and the wall socket. If your cord
ever becomes frayed or split, replace it immediately.
POWER AMP ASSIGN SWITCH
The position of the Power Amp Assign switch determines the SM-500's mode of operation (based
on the impedance of the cabinet or cabinets that you intend to use). If you want to run your ampli-
fier in Stereo mode, move the Power Amp Assign switch to the "Stereo" position. Operation in
Bridge mode is achieved by setting the switch to the "Bridge" position. (For Stereo and
Bridge/Mono mode connection information, see diagrams beginning on page XX.)
Minimum impedance in the Stereo mode is 4 ohms per side. This means that you can connect:
• One 4 ohm speaker enclosure per side
• Two 8 ohm speaker enclosures per side
Minimum impedance in the Bridge/Mono mode is 8 ohms. This means that you can connect:
• One 8 ohm speaker enclosure to the Bridge/Mono output
• Two 16 ohm speaker enclosures to the Bridge/Mono output
Damage to the SM-500's power amplifier section may occur if speaker enclosures are connected
to the speaker output section with impedances that total less than the minimum loads listed
above. The owner's manual that came with your speaker cabinet should state its total impedance.
On SWR speaker enclosures, the total impedance is generally indicated on the speaker's input
panel.
To figure out the total impedance of two or more cabinets of equal value hooked up in parallel, divide the impedance of
one cabinet by the number of cabinets:
Impedance of one cabinet / number of cabinets = total impedance
For an in-depth discussion of impedance/power rating issues, we recommend reading the article
"Plug & Play," which cane be found in the "Press" section at: swrsound.com
LEFT & RIGHT SPEAKER FUSES
The left and right speaker fuses are provided to protect your speakers in the unlikely event of a
power amp failure or incorrect connection procedures. Size and rating of the fuses are 3AG, 8
amp, fast-blo. Do not defeat the purpose of this feature by using a higher rated fuse.
The speaker fuses can open if there is a fault in the speaker cable or the speakers themselves.
Therefore, it is always wise to carry extra fuses at all times.
SPEAKER OUTPUT JACKS
Note: If you are using only one channel (in Stereo mode), use the left channel speaker output, as the thermal sen-
sor for the fan is located on the left heat sink.
When used in Stereo mode, the internal power amplifiers of the SM-500 will deliver 250 watts @
4 ohms and 150 watts into 8 ohms. Optimum performance will be achieved by using a total of 4
ohms per channel. Minimum speaker load in the stereo mode is 4 ohms per side.
When used in the Bridge mode, the SM-500 will deliver 250 watts into 16 ohms, 400 watts into 8
ohms. Please make sure the speakers you use in this mode can handle the power. Minimum load
in the "Bridge" mode is 8 ohms.
12 • SM-500