Acoustic Image Introduces Clarus SL and SL-R Bass Head Models

Acoustic Image is reintroducing new and improved Series 4plus versions of its ultra-portable Clarus SL and Clarus SL-R models
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Acoustic Image today announced that, in response to customer demand, it is reintroducing new and improved Series 4plus versions of its ultra-portable Clarus SL and Clarus SL-R model single-channel amp heads incorporating AI’s industry-leading Flex pre-amp technology as well as more features and a full 600 watts of power into 4 ohms.

Designed, like all Acoustic Image products, to amplify any instrument, the full-range Clarus SL-R (with high quality reverb) and Clarus SL (no reverb) share the same tiny format as their predecessors (approximately 2X7X7 inches). At just over 2 1/2 lbs., each sets a new standard for portability, power and transparency.

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“Players have been telling us for years that there is a need for a small, powerful, one-channel, high fidelity head for gigging anywhere, but particularly on the road,” said Dr. Rick Jones, Acoustic Image Founder and Chief Designer. “The Clarus SL-R and Clarus SL—incorporating our widely-praised, proprietary Flex preamp technology—are a direct response to that need.”

Street prices are $549 for the Clarus SL and $649 for the Clarus SL-R. 

Features and specifications for the two models:


SystemFrequency Response30 Hz - 20 kHz, ±3 dBSignal to Noise Ratio>110 dB at direct outAC Power 100V to 240V, 50/60 Hz, automatically switchedSize2.1” H x 7.2” W x 7.4” DWeight2 lbs, 10 ozPreampInstrument Input1 Mohm or 10 Mohm, 1/4 inch jackDirect Out+4 dB, balanced, XLR connector, ground lift,
pre/post EQ selector, 10 dB padEffects LoopParallel typeLow Control Shelving type, ±12 dB at 30 HzLow Mid Control±12 dB at 250 HzHigh Mid Control±12 dB at 1200 HzHigh ControlShelving type, ±15 dB at 10 kHzLow Cut Filter-12 dB/oct sweepable from 30 to 180 HzEffects (SL-R only)Type24 bit digital with 3 programsProgramsReverb with variable decay time,
Delay/Reverb with variable delay time
Delay with variable delay time
All have variable wet/dry mixPower AmpTopologyClass D (PWM)Switching Frequency500 kHzOutput Power 8ohm300W rms continuous
350W rms music (40% duty cycle)
500W peak transientOutput Power 4ohm500W rms continuous
650W rms music (40% duty cycle)
1000W peak transientExternal Speaker Out Speakon type (pole 1), 2ohm min load

For more information: Acoustic Image

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Amplifying the upright bass is a problem that has generated many solutions over the years (see the Fender Bass), but back in 1997, Acoustic Image made an impact with its answer: lightweight, high-fidelity amplifiers and fresh cabinet designs that offered portability and serious low-end dispersion.