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Sensitivity (full output under clipping, 8 ohms load, 100 Hz):
Passive Input Jack: 38 millivolts
Active Input Jack: 60 millivolts
Power Amplifier (Effects Return Jack “in”): 5 volts
Input Impedance
Passive/Active Input: 800k Ohms
Active Input: 60k Ohms
Effects Return: 27k Ohms
Output Impedance
Effects Send: 100 Ohms
Tuner Send: 100 Ohms
XLR (Balanced) Out: 750 Ohms
Signal To Noise Ratio: –72 dB (<10 millivolts typical)
Equivalent Input Noise: 9 microvolts
Dimensions (depth includes handles and XLR pad): 19" W x 3.5" H x 12.125" D
Weight: 17 lbs.
350x • GETTING STARTED
Connecting Your Speaker Cabinets
The 350x is a mono amplifier, which makes things fairly simple. Locate the “Speaker Outputs” section on
the rear of the amp. You will notice that there are four different speaker output jacks, two 1/4" type and
two Speakon type jacks. The Speakon jacks are preferable if your speaker cabinet is equipped with
Speakons as well; however, you can use any of the four available jacks to connect your speaker(s) to the
350x.
Using One Speaker Cabinet
Using a speaker cable of 18 gauge or heavier (the heavier the cable, the lower the gauge), simply connect
any one of the 350x’s Speaker Output jacks to the input jacks of your speaker cabinet. If your cabinet is a
4 ohm enclosure, the 350x will deliver 350 watts into it. If your cabinet is an 8 ohm enclosure, it will deliv-
er 240 watts into it. Be sure to check the power handling capabilities of your speaker cabinet before con-
nection and operation.
Using Two Speaker Cabinets
Using a speaker cable of 18 gauge or heavier (the heavier the cable, the lower the gauge), simply connect
any of the 350x’s Speaker Output jacks to the input jacks of your two speaker cabinets. (You can use one
1/4" and one Speakon Output jack each if you wish; however, it is always best to use speaker cables with
similar type ends.) If the cabinets are the same impedance, the same amount of power will be sent to
each enclosure. If the cabinets are different impedances, more power will flow to the cabinet with the
lower impedance. Since the 350x is a mono amplifier and individual cabinet levels cannot be adjusted, it is
recommended that you use cabinets of the same impedance when using more than one cabinet. If you use
two 8 ohm cabinets—the two-cabinet setup recommended by SWR—the resulting “total” impedance will be
4 ohms, and the 350x will deliver 350 watts spread across both cabinets. Needless to say, in all cases,
be sure to check the power handling capabilities and impedance of your speaker cabinet(s) before connec-
tion and operation.
350x OWNER’S MANUAL • 3