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Aguilar Tone Hammer Preamp / Direct Box Bass Pedal  

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This preamp/direct box is so strong and powerful it could only be called the "Tone Hammer"! Based on the respected OBP-3 preamp, the Tone Hammer features fully sweepable midrange frequencies in additi... Read More

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This preamp/direct box is so strong and powerful it could only be called the "Tone Hammer"! Based on the respected OBP-3 preamp, the Tone Hammer features fully sweepable midrange frequencies in addition to bass and treble controls. With the Tone Hammer's pristine D.I. you are set for the studio or the stage.

To give this tone-shaping unit the ultimate flexibility Aguilar are introducing their proprietary Adaptive Gain Shaping circuitry (AGS). AGS allows the player to kick in an additional gain structure and EQ with the "stomp" of a button. You can now go from modern slap sounds to vintage or overdriven. Its 18V operation gives the Tone Hammer plenty of headroom to reproduce the most dynamic playing style. Separate Gain and Master controls allow you to dial in just the right gain structure for any instrument.

The Tone Hammer is the essential preamp/direct box for every bassist's tool box.

  • Pre/Post DI
  • Unbalanced output can drive a power amp
  • AGS circuitry
  • Cut and boost of treble, mid and bass frequencies
  • Fully sweepable midrange frequencies
  • Powered by two 9V batteries, phantom power or optional universal power supply
  • Ground lift switch
  • Heavy-duty steel construction
  • Inputs: One 1/4" jack
  • Outputs: One 1/4" jack, One XLR (nominal output - 14dBu balanced)
  • :
  • Bass +/- 18dB @ 40Hz
  • Mid +/- 17dB @ 180Hz to 1kHz
  • Treble +/- 18dB @ 4kHz
  • :
  • Ground lift switch
  • Pre/Post DI switch
  • Engage switch
  • AGS switch
Aguilar Amplification's DB series of electronics are covered under warranty to the original owner for a period of ten years from the date of purchase against defects in materials and workmanship. AG series electronics, GS series speaker cabinets, and S series speaker cabinets are covered by the warranty for a period of 3 years. Tubes are covered by the warranty for a period of six months.

The warranty period starts from the date of purchase from an authorized Aguilar dealer. Your sales slip or purchase invoice is necessary for warranty service.

Before sending your unit to Aguilar for repair, you must receive a return authorization number from us. Contact us via phone, fax, or email (techsupport@aguilaramp.com) with a description of the problem. We will then issue to you a return authorization number.

You are responsible for all shipping charges. You must ship the unit to us freight prepaid. We will return the unit to you freight collect. If the unit is being sent from outside the United States you will also be responsible for customs brokerage, if applicable. Please check with your freight forwarder for assistance.

Aguilar Amplification LLC is not responsible for shipping damage, either to or from our service center. Claims must be filed with the carrier.

The only company authorized to perform work under this warranty is Aguilar Amplification LLC of New York, NY.

Pro Coverage gives you added warranty protection for your new gear. Stepping in where the manufacturer's "normal wear and tear" coverage ends, our Pro Coverage program offers you upgraded coverage if your product ever fails Read More.

Pro Coverage includes
  • Accidental damage protection (new gear only)
  • Expedited repair
  • Free shipping (for returns or repairs)
  • 100% coverage for commercial use
  • Extended return period
  • Extended price protection
  • No lemon guarantee
  • Free transfer of coverage to a new owner
  • Repair costs covered for up to three years from date of purchase
  • Repair authorization-toll-free by phone or via the web
  • Customer Reviews

Review Snapshot

by PowerReviews
AguilarTone Hammer Preamp / Direct Box Bass Pedal

(based on 1 review)

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Reviewed by 1 customer

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(2 of 4 customers found this review helpful)


Great tone shaping, starts to lose focus after time, no true bypass (still recommend)


from Virginia/DC/Maryland area

Comments about Aguilar Tone Hammer Preamp / Direct Box Bass Pedal:

Like the title says, the tone shaping options work very well, in a variety of settings. Cuts through, warm sound, articulate, adds good punch and body. However, people should know that as long as it is plugged into the chain and powered, it will bleed into your clean sound even when the pedal is off. So, I've been holding off on using it regularly until I get a master-bypass unit to solve this issue. Additionally, while the pedal sounds great for the first hour or so, it starts to "tire out" after that, and becomes too saturated for my taste. I still have found it useful though, and will even more so as soon I can get the bypass (so that I can utilize it as an alternate tonal channel). Oh, and it might just be me, but I have yet to find any good uses for the AGS, which basically comes out as sounding like a super-saturated distortion except at extremely low levels of gain (I'm talking like 7- to 8-o'clock maximum). I play through a Markbass Big Bang with Markbass cabs, and use primarily a Ken Smith EG, so I purchased the pedal as an additional tonal/timbre option that I could switch to and from as needed, rather than to improve the timbre overall (it's not an "always on" for me). This is what makes the lack of true bypass such a problem for me, but not enough of a problem that I would return or sell the pedal rather than find a fix.

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