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Amplifiers & SpeakersAmplifier Heads

Acoustic Image Series 4PLUS CLARUS SL-2 - 2-channel instrument amplifier

         Manufactured by: Acoustic Image


Continental US - larger items may carry a partial shipping charge to AK, HI and PR
All shoppers outside the US State of New Jersey pay NO SALES TAX on any purchases at Gollihur Music. (NJ Residents pay NJ State Sales Tax of 6.875%.) International customers, please visit our "How to Order" Policies page for information concerning VAT and Customs Charges that may be assessed by your country and/or delivery services.
  $749.00  

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(Note that larger items may carry a partial shipping charge to AK, HI and PR.)
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FLAT RATE WORLDWIDE SHIPPING!14 Day Trial Period on Series 4 Acoustic Image amps and speaker cabinets

New owners have a fourteen day trial period during which they may return the amp in new condition -- NO QUESTIONS ASKED! -- for a full refund, minus our outgoing shipping cost and a small transaction fee to cover credit card processing. Returns must be preauthorized; a restocking fee applies if the unit is not returned in new condition.


Acoustic Image is at it again! Building on the success of the Clarus and Clarus SL, now they have the most compact, two-channel amplifier head yet!

The Clarus amp has been a longtime favorite among bassists, jazz and acoustic guitarists, and many other musicians for many years. The Clarus SL was just reissued to great success a couple years ago; it put the pristine sound and clean power of the Clarus amps into a smaller, one-channel model.

Never a company to quit while they're ahead, now AI has given us the Clarus SL-2 - a TWO-Channel version of the diminuitive (yet deceptively powerful) Clarus SL amp. Perfect if you want to mix two pickups, two mics, or a combination of the two. The "smart" inputs automatically sense the type of connector you've plugged in, and corrects to the appropriate preamp circuit for either mic or high-impedance pickup. It even has 48v phantom and a 10dB boost for microphones.

At under 2.5 pounds, this amp is incredibly portable. Yet, it's ridiculously powerful; it uses the same power section as the larger Clarus, and therefore has up to 650w of clean, uncolored power. It's rated at 4 and 8 ohms, but will safely and effectively handle a 2 ohm load.

All of the Clarus SL amplifier heads can be matched with most any speaker cabinet, for use with a huge variety of instruments. The clean, transparent sound is exceptional for bringing out the best in acoustic instruments like upright or acoustic-electric bass, acoustic or jazz-box guitar, violin, mandolin, cello, harp, ukulele, and more. Unlike the amps of the (not so distant) past, you don't need a roadie to help you move it, either - this 650w preamp/amplifier is under 2.5 lbs, and fits easily into a small padded carry bag (included) that you carry with one hand.

The Clarus head uses the same preamp components as the other AI gear, and features the newest, quietest, most reliable power amp yet.

Couple this amazing head with an Acoustic Image "EX" or UpShot extension speaker, or with a bass or guitar speaker from another manufacturer. It even sounds great powering a passive PA speaker, like a JBL or Mackie wedge! It provides full-range, uncolored sound for the most realistic reproduction of your acoustic instrument. (Though it works great with keyboards, too!)

I use Acoustic Image gear for almost all of my URB and EUB gigs... what wins me over is -- when teamed with a good pickup or mic -- the amp tends to simply make my bass sound acoustically bigger, rather than giving it a separate electric voice.

— Bob

How can I use this amp?

The Clarus amplifier is an amplifier "head", meaning that it contains a preamplifier and power amplifier; to get sound, you'll need to connect it to a speaker cabinet. We've broken down our description below into sections so that you can understand the various parts of the whole.

The Preamp:

A key ingredient in Acoustic Image gear is the very careful design of the electronics. They have always been engineered to deliver the natural sound of your instrument, no artificial flavorings or colors. Please answer this question... do you want to hear your instrument or the amp??

Me, too. My specifications for an ideal sound is for a pickup and amp to simply make my bass sound bigger than the bass can sound on its own. Don't add or take anything away -- MY bass, only LOUDER.

Besides the amazing transparent sound, useful features have been designed into the Acoustic Image preamps to provide the most flexibility for various playing situations. For instance, you get a selectable low-cut (aka high pass) filter on each channel, to help with feedback or “boominess” elimination (see explanation in features list below). You also get a balanced direct out with ground lift and 10 dB pad, as well as pre/post setting, to allow connection to a mixing board for PA support, or for recording purposes.

Separate Level (Gain) and EQ Controls allow for precise tonal and blend control of separate inputs, and a Master Mute Switch allows you to cut the output for silent tuning or for breaks.

The preamp features the new, FLEX-Style four-channel equalizer, as follows:
  • Low: Shelving, ±12dB at 30Hz
  • Lo Mid: ±12dB at 250 Hz
  • Hi Mid: ±12dB at 1200 Hz
  • Treble: Shelving, ±15dB at 10 kHz
One last handy feature on the Series 4PLUS amps - illuminated on/off buttons for the front panel controls to indicate whether the button is on (lit) or off (unlit). This is really helpful on a dark stage!

The Power Amplifier:

More Power!! (please insert your own Tim Allen Home Improvement TV show grunts) Yes, it can put out up to 650 watts (at 4 ohms). That said, the Clarus heads are not rock and roll amps — it's clean power, and can get LOUD (depending on the speaker) but it's not designed for creating distorted or overdriven effects (though you could certainly accomplish these sounds with effects pedals or processors).

With so much wattage, this head can get quite loud. But the wattage is there to ensure smooth, clean response. Bass frequencies, in particular, take a great deal more energy to produce that high frequencies, and the somewhat percussive nature of upright bass can be very demanding. The "extra" energy (commonly called "headroom") is available to cleanly handle those peaks and percussive plucks, so you don't get that "squashed" sort of attack many bass amps often deliver when they hit the wall.

Other Fun Facts to Know and Share

The S4 Clarus SL2 is the newest version of the Acoustic Image Clarus Head, and is equipped with two discrete channels that can each properly handle a mic or pickup.

Each channel has a low cut filter, which is a variable frequency type that inserts a 12 dB per octave rolloff at frequencies between 30 and 180 Hz, depending on the position of the control. The low cut filter is used to reduce the bass output in cases where room location or instrument/pickup combination results in “boomy” sound. Experiment with the position of the control to give you the sound you like best.

Sure, we mostly sell the Clarus amps to bassists, because that's what we do here at Gollihur Music. But AI Clarus amps are full-range, and therefore also very popular with jazz box and acoustic guitarists, mandolin players, violinists, cellists... the list goes on.

Features:
  • 1/4" TRS inputs; mono cable is optimal for high-impedance pickup, TRS uses impedance and gain structure for mics (and phantom power)
  • Low Cut Filter (per channel): -12 dB/octave sweepable from 30-180 Hz
  • Balanced XLR DI Output with Ground Lift
  • PRE- or POST- switch for XLR output
  • AC Power On/Off switch with LED Indicator
  • 650-Watt (@4 ohms) "Digital" Power Amplifier -- (650w @4 ohms, 350w @8 ohms - 2 ohms minimum load)
  • 2 External Speaker Outputs (Neutrik Speakon)
  • Detachable AC Input Connector with Built-in Fuse
  • Automatic Voltage Switching for universal AC Mains Operation (comes with USA Cable; to use in other countries, you can source an IEC-C13 AC Cable, also commonly used for computer power supplies.)

Physical:
  • Lightweight- less than 2.5 lbs!
  • Durable Powder-coated Aluminum Enclosure
  • 7.4 x 7.2 x 2.1
  • Padded Carry Bag included
  • FIVE YEAR(plus) WARRANTY



Not 100% Sure? New owners have a fourteen-day trial period during which they may return the amp, in like new condition, for a full refund less actual shipping cost.



This item is made in USA! Click for more 'Made in America' items!


Is this product returnable? Click here for our return policy.
Is there a Factory Warranty? Click here to find Warranty Information for all of our manufacturers.
International customer? Click here for important information about ordering from outside the USA, and what to expect concerning taxes, VAT, delivery times, and more.


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