Thunderfunk Bass Amplifiers - Effects Loop; Speaker Output

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Effects Loop 1
This is a standard loop with low-impedance line level out and high-impedance line level back in.
The branch is after the Gain/Limiter, and Enhance controls, but before the EQ section and the
Timbre, Volume controls.
EffectsLoop2
This is also a standard loop with low-impedance line level out and high-impedance line level back
in. The branch is made after all the preamp features, including Gain/Limiting, Enhance, EQ, and
theVolumeandTimbrecontrols.Plugginga¼inchjackintotheEffectsSendofthisloopprovides
a 1-volt maximum line level signal out. This can be routed to your choice of effects unit, a mixing
console, another power amp/speaker system, etc. The preamp is still routed to the internal Power
Amp. (NOTE: Some external power amps require more than 1-volt to be driven to full power.)
Whenpluggingalinelevelreturnsignalviathe¼inchjackintotheEffectsReturnofthisloop,all
thepreampfeaturesaredisconnected.Onlythelinesignalfromtheinserted¼inchjackissent
to the Power Amp. You can use the return signal for the device at the Effects Send of this loop,
or bring a mono signal from a mixing console or another preamp to the Power Amp input of the
Thunderfunk.ThisiswhereyouwouldconnectthespecialXLRtoPhonejackcable,mentioned
in the Post EQ Balanced section of this manual, to connect or “daisy chain” several Thunderfunk
slave amps together, matching the setup with one set of preamp controls working all the Thun-
derfunk slave power amps.
Speaker Output
Thesetwo¼inchjacksarewiredinparalleltoaccepttraditionalspeakerconnectioncables.There
arealsoSpeakonConnectors(theTFB420hasone,whiletheTFB550hastwo)toacceptmodern
speakerconnections.Thetotalspeakersystemimpedancemaynotbelowerthan4Ohms.Doing
so will void the warranty. Your speaker system should be chosen for the characteristics of your
amplier,yourstyle,andyourapplication.Ifyouwillonlybeusingonecabinet,a4Ωmodelwill
drawthemostpowerfromyouramplier.Ifyouwillgenerallybeusingtwocabinets,theyshould
be8Ωmodelssotheircombinedimpedancewillbe4ohms.Cabinetswith10”speakerssound
different than cabinets with 15” speakers.
Bewareof2x10cabinetsthatareratedat4ohms.Theywilldrawmaximumpowerfromtheamp
andmaynotberatedforsomuchpower.Addingasecond2x10-4Ωcabinetwillloadtheampto
2ohms,andcouldpossiblyoverheattheampdependingonhowhardit‘sdriven.