FLEX 2-Channel Preamplifier (Stand-mountable, Series 4+)

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  • FLEX 2-Channel Preamplifier (Stand-mountable, Series 4+), preamp front
  • FLEX 2-Channel Preamplifier (Stand-mountable, Series 4+), preamp back
  • FLEX 2-Channel Preamplifier (Stand-mountable, Series 4+), preamp in bag
  • FLEX 2-Channel Preamplifier (Stand-mountable, Series 4+), tone control diagram
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The mad scientists at Acoustic Image are at it again. Never content to rest on their past successes, Rick Jones and company are constantly looking for new, better, more efficient ways to help acoustic instrumentalists be heard in the best voice possible. They've continually re-developed their innovative amplification systems over the past decade and a half, and each new version features new, smart features.

Their newest development is the convenient FLEX modular system. With two convenient components - a mic-stand mountable 2-channel preamp and a compact, 2x10 tri-amped powered speaker - that you can combine into a "combo" (or use independently), you have a powerful modular SYSTEM that can handle most any professional situation.

Includes our exclusive Gollihur Music tipsheet to get the most out of your purchaseThe heart of the system is the brand new FLEX Preamp. Building upon the time-tested design of the previous Acoustic Image combos and heads, it adds some new features and specifications that you're going to love - and it's a brand-new preamp-only design that you can conveniently mount on a mic stand, or sit on a tabletop, for easy access to the controls.

It has a host of inputs and outputs - with effects loops and separate line-outs for each channel, and a master DI output, as well as a new "pseudo-stereo" output for when you use stereo effects - you've got all the same flexibility as the original Clarus amp.

The FLEX preamp also includes some new features. The ¼" (instrument) and XLR (mic) inputs are now on separate jacks, rather than the combo jack - and they're independently buffered. So you can even plug in up to four different things (2 mics and 2 instruments) and get quality signal; you won't have as much control over blend, though, unless the instruments have their own output volume controls (like a keyboard, for instance.) And the EQ has been expanded from 3 bands to 4; carefully selected lo-mid and hi-mid controls provide a lot more control over your tone. All of the buttons on the face of the preamp now illuminate when they're active, so you never have to wonder whether the button is "on" or "off," even on a dark stage. And the built-in effects have been overhauled - the rarely used effects have been removed, leaving you the useful reverb, delay, and new "both" setting - as well as a new "rate" knob for more control over the settings of the effect.

All of this, packed into a small, lightweight (under 2.5 lbs) unit that can be mounted atop a standard mic stand right in front of you onstage.


  • Size: 2.5"H x 11/5"W x 5"D
  • Weight: 2.5 lbs
  • Inputs:
    • Microphone: 600 ohm balanced, 10db gain, 48v phantom Power
    • Instrument: 1 MegOhm impedance
  • DI Outputs: Balanced XLR, +4dB, Ground Lift, Pre/Post, 10dB pad
  • Effects Loops: Parallel with separate i/o jacks, per channel
  • EQ:
    • Low: Shelving, ±12dB at 50Hz
    • Lo Mid: ±12dB at 250 Hz
    • Hi Mid: ±12dB at 1200 Hz
    • Treble: Shelving, ±12dB at 8 kHz
  • Low Cut Filter: -12 dB/octave sweepable from 30-150 Hz
  • Phase Reverse: Switchable 180°
  • Optional Speaker Emulator (see manual)
  • Effects: 24 bit digital with 3 programs (Reverb, Delay, Reverb+Delay)
  • Outputs:
    • Proprietary Balanced signal/phantom power interface via RJ-45 (Cat5, 100 ft. maximum length)
    • 1/4" Unbalanced Outputs
  • Supplied Accessories:
    • Padded Gig Bag
    • 10 foot Cat5 Cable
    • Mic Stand Adapter
    • DC power Supply


14 Day Trial Period on Acoustic Image Clarus, Contra, Corus, Ten2 and FLEX amps!

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 or PayPal payment processing. Returns must be preauthorized; restocking fee applies if unit is not returned in new condition.

14-Day Trial Period

Your purchase of this Acoustic Image Amplification Equipment is covered by the exclusive Gollihur Music 14-day Trial Period, under the following terms:

You may contact us to return this item, for any reason (or no reason), within the first fourteen days of ownership. The timer starts on the day that you receive the item, not the order date.

Returns are subject to deductions as follows:

  1. Any shipping costs you paid are not refunded, and if the item shipped free, the costs we incurred to ship the item to you will be deducted from your refund or credit.
  2. All shipping costs you incur to return the item are your responsibility.
  3. A small fee is deducted from your refund to cover credit card/PayPal fees which are not refunded to us even if we refund your charge. Note that if you choose to accept a store credit instead of a refund, this deduction does not apply.

Items must be returned in 100% "as new" condition, with all original packaging, shipping materials, and accessories/manuals/bonus items. Deductions are assessed for missing or damaged items.

IMPORTANT: You must contact us for authorization BEFORE shipping the item back.

Product Manual

Need to figure out some of the more in-depth features of this product? Here's a copy of the manual, in PDF format, here.

You may wish to visit the manufacturer's website to see if a more recent version is available.



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Warranty Information

Acoustic Image's Warranty, Simply Stated

We stand behind our products with a full warranty of five years from the date of purchase. Speaker components are warranted for 180 days. Should a problem arise, please call us before returning your amplifier or enclosure. Naturally, our warranty does not cover products that have been damaged through misuse.

Bottom line, we don't say that ours is a "lifetime warranty" or even a "limited lifetime warranty". We do, however, commit to treat you the way we would like to be treated. For good.
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