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Amplifiers & SpeakersCombo Amps

Acoustic Image TEN2 Series 4plus Combo Amplifier

         Manufactured by: Acoustic Image

Continental US - 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.

Bob and Mark were pleased to have the opportunity to put the prototype of the original Series III Ten2 through its paces, and we're happy to say that the newest Series 4PLUS model again raises the bar for Acoustic Image products. The Ten2 combo (and its matching extension cab) are the world’s smallest and lightest dual-tens - and the only ones to offer transparent 360-degree AI sound.

The newest model in the Acoustic Image line, the Ten2 Combo, offers significantly more midrange presence compared with other AI enclosures, without the typical “hump” served up by traditional cabs. This is, in part, thanks to a specially designed crossover which also corrects for phase differences between downfiring and frontfiring drivers.

In addition, they have added their new proprietary Room Coupling Control to help tame boomy acoustic settings. Thanks to its frequency range and frontfiring woofer, the Ten2 is well suited to bass, guitar, piano, and vocals—in fact, to any musical application calling for a more forward presentation of the time-honored AI sound.

The Ten2 combo incorporates a 650W Clarus 2-channel head, mounted into the cabinet using the Cabrio Docking System, which allows you to separate the head from the cabinet for independent use.

A cool built-in "kickstand" mechanism allows the cabinet to be tilted to better direct sound to the player’s listening position. For larger venues, the Ten2 EX (Series 4) extension cabinet is an ideal match.

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

LOTS more detail below!

Bob's first Acoustic Image combo (a Contra) arrived in 1999, and we've been hooked on their incredible amps ever since. Its design was innovative, it was eminently portable, and its sound was unmatched by any other amp on the market. And the smart folks at Acoustic Image didn't rest on their laurels, they continued to hone the design by responding to the needs of their users; over the years, they made them lighter, smaller, and more powerful. Not to mention better-sounding, quieter, and more feature-packed.

They've come a long way since the first series of amps, and we're very proud to have made the journey along with them -- as a valued "partner" (not just a "seller") for Acoustic Image.

So now, we have the next generation of amps. With the advent of the new "Flex" system (see related links, below), Rick Jones -- the bassist and engineer behind the design of these fabulous amps -- seized the opportunity to improve on the design of the Acoustic Image preamps. As of now, all of the two-channel Acoustic Image models -- Ten2, Coda, Corus, and Clarus -- incorporate the new "Flex" design preamp, which features a new four-band EQ, improved effects, and more (see below.) These new models are therefore designated as "Series 4PLUS."

The Ten2 amplifier is an all-in-one "combo" amp, meaning that it contains a preamplifier, power amplifier, and speaker system in one compact unit. 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/mic and amp to simply make my bass sound bigger.

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 -- on each channel -- a parallel effects loop, and a selectable low-cut (aka high pass) filter to help with feedback or “boominess” elimination (see explanation in features list below). Both channels have on/off access to the built-in digital effects. You also get a balanced direct out with ground lift, as well as pre/post setting, to allow connection to a mixing board for PA support, or for recording purposes. There's even a Phase Switch, which alters the phase by 180°, which can often help with acoustic feedback.

The front end also features the input options for either microphones (XLR) or instruments (¼"), and switchable 48v phantom power -- and a 10db gain switch (for low/high output mics) -- is available on the XLR input. Separate Input Level (gain) and Output Volume Controls allow for precise tonal vs. volume control, and a Master Mute Switch allows you to cut the output for silent tuning or for breaks.

The two-channel, Series 4PLUS Ten2 has two separate channels which can be used to blend two sources - two different pickups or mics (or a combination of the two), or two different instruments. The XLR and ¼" inputs are on separate jacks. Additionally, they are separately buffered, which means that you could effectively use both at once, on each channel. You would only have independent control if at least one of those sources had its own volume control (like a keyboard, or an instrument with an outboard active preamp) but it does open up the possibility of actually "mixing" up to four different sources.

The preamp features a new four-channel equalizer, as follows:
  • Low: Shelving, ±12dB at 50Hz
  • Lo Mid: ±12dB at 250 Hz
  • Hi Mid: ±12dB at 1200 Hz
  • Treble: Shelving, ±12dB at 8 kHz
The built-in Digital Effects can be assigned to either channel (or both/neither), and the amount of the effects in your mixed signal can be adjusted with the level knob. The rate setting is now configurable (!) and the effects include the following presets:
  • Reverb
  • Delay
  • Reverb PLUS Delay
One last new feature - 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 combos are not rock and roll amps — a small combo shouldn't be expected to compete with your 4x10 stack!

Yes, with that sort of power, this combo can get quite loud. But the wattage is there to ensure smooth, clean response. Bass frequencies 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.

The wattage is certainly handy to have when you have larger gigs, too. Lots of players gig Acoustic Image Clarus heads (which is identical to the preamp/power amp section of this combo) along with a more conventional and efficient speaker cabinet for larger gigs. And since the head "pops out" easily and quickly -- 30 seconds or less, no tools required -- you have that option available to you with this combo! I, myself, have taken the head out of the combo, for use with a larger speaker setup, on electric bass/classic rock gigs. It did an admirable job driving a pair of Euphonic Audio Wizzy 10 cabs -- it makes for a formidible, yet still very light and highly portable, rig.

The Speakers:

The design and performance of the Acoustic Image speaker array is quite revolutionary. The Ten2 is a hybrid of the classic downfiring woofer design, coupled with a more traditional front-facing woofer for more "in yer face" sound. Why have a down-firing (facing down into the floor) woofer? The lowest bass frequencies are omnidirectional. As we all know, our acoustic instruments do not radiate only in one direction — their sound moves about the room. The ten inch down-firing woofer in the Acoustic Image combos spreads that sound around naturally, as our ears might expect. There is still plenty of definition, it's just not as annoyingly directional as so many other amps can be. With other amps, you might walk across the front of the stage, and suddenly you walk into a small "zone" where THE BASS is SHOUTING at you. Not so with this amp.

But that's only one of the differences between it and other bass amps. These combos have a complement of drivers that results in a full range speaker cabinet. In addition to the 2 woofers, you'll find a 2.5 coaxial tweeter to cover the high frequencies. Plug your MP3 player in and be amazed at the result! Nice, tight bass, with balanced mids and highs; real, uncolored sound. As pure and clear as the sound in front of your instrument, no added "shading."

What you get is flat frequency response across the spectrum, extended, tight, well-controlled natural bass sound, and solid, omnidirectional output of your low end (so you can be heard, without monitors, all over the bandstand) — all in a package that's about foot and a half tall and only around 32 pounds in weight! In fact, the amp virtually disappears on stage leaving behind the natural sound of the bass - it's like having another double bass on stage along with you!

Other Fun Facts to Know and Share

The S4+ Ten2 is the newest version of the Acoustic Image 2x10 combo; it replaces all of the Series III and Series 4 (1 channel) Ten2 models, and features two identical input channels. All models include built-in digital effects. It includes the Cabrio Docking System, which allows you to remove the Clarus head from the combo and use each component separately!

These combo amps were a real breakthrough when first developed by Dr. Rick Jones, a bass player (check out his CD at right for firm cred) as well as founder, and President of Acoustic Image, and they continue to get better with each generation.

AI was on my personal Bass Radar in the late 90's, when I first saw some buzz about this new down-firing bass amp. My first Acoustic Image combo arrived in 1999, and I took it to the NAMM 2000 show in Los Angeles, to demonstrate K&K Sound upright bass pickups in their booth. At one point, Dieter from K&K saw this little wonder, and borrowed it, to see how his acoustic guitar pickups sounded through it.

It took me six hours to wrestle it back from him. The amp was that good. And now, after lots of improvements and updates over the years, it's even better.

What about electric bass?? We've played electric 5-string bass through the Ten2, and Bob even had it on a gig or two for his blues/rock band. It does an admirable job, and can cover gigs where a tight, clean tone is preferable. You can even play slap-n-pop bass through it (though I'm sure there are bass rigs better suited for that sound.) For a more aggressive bass, or your Def Leppard tribute band, you would certainly want a more traditional rig - but in a pinch, this amp can cover the gig. Also see my points about using the head separately, and the sidebar (below) about the head being the ultimate back up amp...

Is the Clarus the Ultimate Back-up Amplifier???
(The removable head in this combo amp is exactly the same, feature-wise, as the Clarus)

These days I actually gig electric bass more than upright (hey, the market dictates what pays, not taste, and I'm sure we both could name some artists that evidence that fact!), and I've been enjoying gigging with the Random Act of Blues this summer of 2011. Anyway, I was auditioning a new bass head that I didn't completely trust, so rather than lug my heavy rack case on this particularly hot day, I stuck a Clarus in one of our Gollihur Gig Bags just in case.

As it turned out, the guitarist's Marshall head died after the first song! I grabbed the Clarus as a temporary replacement; ok, it wasn't a Marshall but he plugged his pedalboard output into it, and it got him through the rest of the set. Thanks to this experience, it occurred to me that the Clarus may be the perfect "backup" amp! Think about it:
  • It is very compact and less than 5 lbs. -- so it's hardly any trouble to carry
  • It has plenty of power to cover bass guitar or URB requirements
  • The Clarus has effects on-board for guitar
  • The 2-channels have two separate channels with EQ, so along with reverb or delay, so it can act a little PA or keyboard head
  • With its high-pass filter and EQ controls, it can make a solid stage monitor amp
How cool is that?!?

  • Balanced, high fidelity sound, with a more in yer face result than the Contra or Coda
  • Cabrio Docking System allows you to separate the amp and speaker components for separate use!
  • 1/4" or XLR input; input impedances are 1 megohm or 600 ohms based on jack chosen, separately buffered
  • Effects Loops via 1/4" phone jacks for each channel
  • Balanced XLR Line Output with Ground Lift
  • PRE- or POST- switch for XLR output
  • Phantom power (switchable) on XLR inputs
  • Channel Input and master level controls
  • AC Power On/Off switch with LED Indicator
  • 650-Watt (@4 ohms) "Digital" Power Amplifier -- clean power!
  • External Speaker Output (Neutrik Speakon)
  • Two-way sealed (infinite baffle) speaker system
  • Headphone output
    • 10" Long-throw Low-frequency Woofer (down-firing)
    • 10" Long-throw Low-frequency Woofer (front-firing)
    • 2.5" coaxial tweeter (mounted in center position in relation to the front firing woofer) with off/two position attenuation switch
  • Phase correcting crossover
  • Exclusive three position (off-medium-high) Room Coupling ControlTM to help tame boomy acoustics
  • Detachable AC Input Connector with Built-in Fuse
  • Dual voltage operation (115v/230v, 50/60 Hz) via automatic switch (comes with USA Cable; to use in other countries, you can source an IEC-C13 AC Cable, also commonly used for computer power supplies.)

  • Molded polymer results in a stiff but light enclosure
  • Lightweight- 32 lbs! with Durable Molded Enclosure
  • 17 inches high, approx 15 inches by 13 inches (rounded)
  • Molded Carry Handles
  • Fitted slip cover with cable pocket and shoulder strap included

Includes Vinyl Cover

Included with all of the combo and extension speaker (EX) models is a lightweight "dust cover" with shoulder strap and accessory pocket. Made of lightweight vinyl, it covers the top and sides of the cabinet, with openings to allow access to the amplifier's integrated handles. It also comes with a carry strap which loops through the openings and the amp handles, allowing you to "shoulder" the amp. The cover is handy - it even has a small pocket for cables, tuners, and other small gigging accessories. But don't expect it to substitute for a case, as it offers only minimal "protection" from slight bumps and other minor hazards. If your gigging needs require something a little more protective, we have other options available separately. Check out the optional padded Mooradian case in the Related Products, below.

The photo at left shows it with the cover on and carry strap ready for transporting. A zippered pouch is provided to carry the power cable and other small items, shown in the photo to the right (without the carry strap). This light-duty cover will not shield the unit from rain, and it does not cover the bottom of the cabinet.
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.

Check Out the FAQ Resources That Apply to This Product:
   ACOUSTIC IMAGE COMBOS/SPEAKERS: What's the difference between the Contra, Coda, Corus and TEN²?
   AMPLIFIERS: Why Would I Want a 'Transparent' Sounding Amp?

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Some of our customers have told us what they think about this product.
Check out what they had to say!
Mark, Just want to let you know I recieved my Acoustic Image Ten2 amp on Friday. I am happy to say, that's my amp... I 'finally' have an amp that will work for me. I play upright and electric and played both on Sunday. Lots of good comments. Thank you for working with me on the purchase. It is not easy buying an amp without hearing it first and I appreciate the way you guys handle this purchase. Count me in as another happy bass player who shopped at your store.
John M (August 2012)
Hi Mark, the AI Ten2 arrived this pm, all good. I set up, plugged in my accordion with both standard analog mic and MIDI, bingo. I have one word based on my initial experience with this unit, ‘Sweeeeet’. Also really liked the ‘Tips from Mark’ sheet. Accordion is no Bass but it does have a bass, whatever :)

You can put me down as a believer, I am in awe…..my wife has already asked me to kindly stop talking about how incredible my new AI Ten2 is….. and believe me I have experience with several amps over the years so it’s not like I do not have references to compare with including my 17 year old PolyTone Elite.

Needless to say should the opportunity ever come up for recommending amps as far as I am concerned it will be AI and Gollihur Music as the place to go, end of story.
Christopher L (May 2016)