• Account
  • View Shopping Cart

Menu Search View Shopping Cart Call Us

Acoustic Image Clarus 1R Series II w/ Reverb Amp Head - Used  From Acoustic Image

Uniquely musical, innovative and versatile, amplification for every instrument and voice!


Our product photos are the actual, specific serial number for sale!

This specific item was photographed by us here in Durham, North Carolina. We are a very small team dedicated to providing you the most accurate photos possible, through our obsessive focus - individually photographing nearly everything that comes through the door. Questions about what you see? Want more information, photos, or just a friendly conversation with someone that cares and who has actually had their hands on this exact item? Contact us now!

Buy Pre-owned from Sound Pure with Absolute Confidence

Sound Pure's dedication to pre-owned products is unprecedented in the industry. We are a small team of dedicated experts that buys, trades, and consigns. We are trusted by customers all over the world. Our curated collection, is thoroughly tested and inspected by some of the best in the business. Our inventory is constantly changing, ever-evolving, with some items sold before reaching the website. Looking for something specific? Have questions about this product's condition or history? Want more photos, or to simply chat with an expert who's had his hands on this actual piece? Contact us now.
Our Current Used/Vintage Collection »

Sound Pure's Consignment Program »

Luthier Certification for Used Instruments »

Acoustic Image Amps

"Gone, Baby, Gone"

This one is sold. Don't miss the next one. Some things never even make it to the site so stay up to date on our used collection.

We get in many oddities, rare and vintage products, most of which go fast. If you're on the hunt for something specific, something unique, or something priced right, let us notify you on our used collection before the items even hit the site.

Want to know if one lands?

Notify Me

Want to discuss what's coming?

What We Think

Condition: Used, Very Good

Manufacturer's Description from Acoustic Image

All Acoustic Image integrated amplifiers are based on a superb class-D power amp that delivers 300 Watts into 2 ohms (Clarus amps), 350 Watts into 2 ohms (Clarus SL amps) or 600 Watts into 4 ohms (Focus amps) and on a sophisticated, sensitive preamplifier. The features of the preamp and the power amp configuration define the specific amp model.

The power amp is a high-efficiency design that requires no external heat sinks or cooling fans and is capable of driving loads as low as 2 ohms (4 ohms for Focus amps). AC power and output speaker jacks are located on the rear of the enclosure. A standard, three-prong detachable AC power cord is used to provide power to the unit, while an AC voltage selection switch allows the unit to operate at 115V/60 Hz or 230V/50 Hz.

Depending on the model chosen, your preamp offers an instrument channel alone or instrument and microphone channels, with or without an 8-program digital reverb (the Clarus SL·R uses the same reverb with three program options). All of our preamps incorporate a four-band EQ per channel, high and low impedance instrument inputs (to optimize the sound of piezo-type pickups), an effects loop with return level control, and a selectable notch/high pass filter for feedback control and reduction of low frequency boominess--along with a direct out capability with ground lift and a master level control. The Clarus SL’s do not have the return level control, notch/high pass filter or the direct out ground lift.

Yours is a high fidelity amplifier with full-range frequency response and low distortion and noise that will accurately amplify your sound. Onboard EQ is sufficient to overcome room acoustics and subtly shape the sound of your instrument. However, you should note that our amps are not designed to play at tonal extremes or with a distorted output. To achieve these, use an external effects box.

Acoustic Image Amps

About Manufacturer

Although Acoustic Image is a relatively young company, it is owned and operated by people with decades of experience in the professional music and sound industry. They're engineers (and, like their customers they're also musicians) who insist upon superior sound quality and reliable performance from our audio equipment. Acoustic Image was founded because they were never satisfied with the products available for the working musician. If you play guitar or bass, violin, keyboard, a woodwind or even a brass instrument, or you are a vocalist, they've got a sound reinforcement product designed with you in mind. Great product designs go far beyond having the right knobs in the right places. Acoustic Image’s company charter is to design and build unique, innovative, and functional audio products... there is nothing "me too" about what they do. In essence, they have merged advanced acoustic design and switching amplifier technology to create incredibly compact, ultra-lightweight products offering highly accurate sound for serious musicians. Ultimately, their pledge to you is for quality... to build a well-constructed reliable audio product that serves you well night after night, year after year. And, quite frankly, they believe the best way to do that is to design and manufacture each and every Acoustic Image product in the U.S.A. Their Technology Applying "musical thinking outside the box", they have taken a different approach to the technology of musical instrument amplification in order to improve the performance and portability of combo amps for the working musician. So, what's so unique about their products? There are three key differences: 1) The use of downfiring low frequency drivers 2) The use of switching power amplifiers and switching power supplies instead of the traditional linear designs 3) The use of unique enclosure shapes to improve portability and sonic performance Each of these differences provides an improvement in the performance of their products. Here's how: The downfiring woofer makes a small driver sound bigger and allows a smaller enclosure for a given driver size. Omnidirectional output produces a more natural and more transparent sound, and means you are more easily heard on the bandstand. The switching (Class D) amplifier design is smaller and more efficient than traditional linear amps. It has less weight because there are no heatsinks or cooling fans and it has a unique "warm" sound (unlike traditional solid state amps) because its output stage is radically different from traditional amps. The switching power supply eliminates large bulky power transformers with a resulting dramatic decrease in weight. With their unique enclosure shapes, form follows function. A cylinder is an inherently stiffer enclosure. And no resonances in the enclosure walls means less coloration in the sound. Also, the stiffer enclosure allows the walls to be thinner and lighter in weight. Add to that the use of acoustically inert polymer materials and the cabinet becomes ultra light. We don't use these new technologies to “be different.” They use them because they make their products better. It all adds up to a more portable, better sounding products. Because of their small size and high sound quality, they virtually disappear on stage, leaving the sound of the instrument being amplified, only louder.


Serial Number: 4B0104


Frequency Response 20 Hz - 20 kHz, ±0.5 dB

Distortion <0.5%, full output, <0.1%, typical

Hum and Noise -85 dB or better

AC Power 115V/60 Hz or 230V/50 Hz, switchable

Size 10x9x2.5 inches (Clarus/Focus)

7.3x7.5x2.2 inches (Clarus SL/SL-R)

Weight 5 lbs (Clarus), 4 lbs (Focus), 40 oz (SL)


(Mic and Instrument Channels-as appropriate to model)

Mic Input 600 ohm balanced, XLR connector

Phantom Power 38 volts, on/off switch

Instrument Inputs Low impedance (1 MΩ),

High Impedance (10 MΩ), separately buffered

Direct Out +4 dB, balanced, XLR connector, ground lift

Effects Loop Parallel type with return level control

Bass Control Shelving type, ±15 dB at 60 Hz

Mid Control ±15 dB at 650 Hz

Treble Control Shelving type, ±15 dB at 10 kHz

Brite Control ±15 dB at 9 kHz

Notch Filter >-18 dB sweepable from 30 to 700 Hz

High Pass Filter -12 dB/octave sweepable from 30 to 700 Hz


(Clarus/Focus 1R/2R, Clarus SL·R only)

Type Digital with 8 presets and level control

Reverb Presets 2 Hall (Concert Hall, Arena), 3 Room (Club,

Chamber, Garage), 2 Plate (Plate, Vocal) and

1 Spring. Clarus SL-R has Concert Hall, Club,

and Spring only


(All Models)

Topology Class D (PWM)

Switching Frequency 280 kHz, 200 kHz for Focus models

Output Power >200 W @ 4Ω, >300 W @ 2Ω (Clarus)

>250 W @ 4Ω, >350 W @ 2Ω (Clarus SL)

>350 W @ 8Ω, >600 W @ 4Ω (Focus)

Minimum Load 2Ω (Clarus and SL), 4Ω (Focus)

Output Connectors Neutrik Speakon-type (pole 1)


Gigbag with shoulder strap, 6 foot Speakon to 1/4 inch cable, power cable