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Community WET Series II - Operation and Installation Manual - Page 15
Know Your Amplifier
Not all amplifiers can safely drive loads below 4 ohms. Very low impedance loads may cause the amplifier to
overheat which may lead to device failure. Even if the amplifier is quite stable driving a low impedance load,
the cable loss will be greater, the damping factor is reduced, and if the amplifier were to fail, a larger portion of
the sound system would be taken off-line.
C-TIP: Keeping the loads at 4 ohms or higher will lengthen the life of your amplifier(s), while improving
the reliability and overall sound quality of your sound system.
Below is a table that gives a quick look at the effect of wire size on line loss. These numbers assume that the
amplifier is producing a constant 48 Volts at its output terminals, which is equivalent to 288 watts into 8Ω or
576 watts into 4Ω:
Size Length Load Z Loss in dB
#10 AWG 100’ 8 Ω -0.42 dB
#10 AWG 200’ 8 Ω -0.83 dB
#10 AWG 100’ 4 Ω -0.83 dB
#10 AWG 200’ 4 Ω -1.58 dB
#12 AWG 100’ 8 Ω -0.66 dB
#12 AWG 200’ 8 Ω -1.28 dB
#12 AWG 100’ 4 Ω -1.28 dB
#12 AWG 200’ 4 Ω -2.39 dB
#14 AWG 100’ 8 Ω -1.03 dB
#14 AWG 200’ 8 Ω -1.95 dB
#14 AWG 100’ 4 Ω -1.95 dB
#14 AWG 200’ 4 Ω -3.55 dB
- WET Series II 1
- 333 East Fifth Street 2
- Chester, PA 19013-4511 USA 2
- Table of Contents 4
- FIND THE LATEST ONLINE 5
- COMMUNITY WET SERIES II 6
- Important Safety Information 8
- Unpacking and Inspection 9
- Physical Features 11
- NO. FEATURE DESCRIPTION 12
- GENERAL DESCRIPTION 13
- HIGH-PASS FILTERS 13
- Unequal Impedances 14
- Know Your Amplifier 15
- Using Power Taps 16
- 70.7V and 100V Systems 18
- SELECTING AMPLIFIERS 19
- AUTOFORMERS 20
- WET SERIES II APPLICATIONS 20
- Installing with Yokes 21
- Safety First! 22
- Rigging Guidelines 22
- 2. Safety Factor 23
- 3. Safety Cable 23
- 4. Threaded Fasteners 24
- 6. Liability 24
- SSY25KIT Yoke Bracket 28
- Figure 9 - SSY25KIT Assembly 29
- Replacement Parts 31
- TROUBLESHOOTING GUIDE 32
- Compact WET II Models 33
- WET II Subwoofer Models 35
- SUMMING THINGS UP 36
- Obtaining Warranty Service 37
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