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Ibanez BTB686SC Terra Firma 6-String Electric Bass Flat Natural

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It's difficult to imagine increasing the amount of sustain the Ibanez BTB has to offer, but with the added mass and stability afforded by this unique single cutaway reworking, the BTB Terra Firma give... Click To Read More About This Product


Gear returned in mint condition. If you're looking for a virtually new instrument in possibly less-than-perfect packaging, this is a great value.
  • Includes 45-Day, No-Hassle Returns
  • Includes full manufacturer's warranty
Gear returned in great condition, with only minor signs of use, such as slight scuffs or pick marks. It looks and plays like new and may be considered an equivalent to display units found in retail stores.
  • Includes 45-Day, No-Hassle Returns
  • Includes full manufacturer's warranty
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It's difficult to imagine increasing the amount of sustain the Ibanez BTB has to offer, but with the added mass and stability afforded by this unique single cutaway reworking, the BTB Terra Firma gives you just that. Capitalizing on the shortened distance from the body to headstock, string vibration is optimized beyond anything Ibanez has ever achieved before.

Upper Horn
This extended Upper Horn creates constant contact with the Maple/Bubinga neck from the 12th to the 24th fret, providing maximum stability and increased sustain.

Contoured Neck Scoop
The back of the neck is sculpted for comfort and easy access to the very highest notes on the C string. The smooth, graceful contour allows the palm of the left hand to move quickly and easily as it transitions up the neck, into the underside of the bass's Ash body.

5pc BTB-6 Maple/Bubinga 35" Scale Thru-Neck
The Maple/Bubinga combination creates one of the strongest Thru-Necks available. The density of the Bubinga, combined with the strength of the Maple, increases stability and sustain through the entire body of the bass. The 35" scale provides a bit more tension for the low B and improves definition in the lower range.

Mono-Rail II bridge
The Mono-Rail bridge delivers the ultimate in string-to-string isolation, allowing each string to vibrate optimally without being affected by the others. The Terra Firma's string spacing is 17mm, offering more freedom on the fretboard and easy access for finger picking and slapping.

Bartolini BH1-6 Pickups
Balancing clarity with warmth is the hallmark of the Bartolini BH1-6 pickup. Coils with lower resonant frequency provide tighter bottom end and a fuller midrange. The dual-coil style configuration maximizes articulation and a long blade pole piece widens the magnetic field, providing balanced string-to-string pickup response.

EBQ-IIIS 3-Band EQ With Mid Frequency Switch
The active 3-band EQ features fully independent bass, treble and mid controls with a wide boost/cut range. The preamp system is equipped with a mid-frequency select switch, enabling you to instantly select 250Hz or 600Hz, the heart of the mid zone, for a more dynamic and ideal tone.


  • Neck type: BTB6 5pc Maple/Bubinga neck-thru
  • Body: Rosewood top/Ash wing body
  • Fretboard: Rosewood fretboard w/Abalone dot inlay
  • Fret: Medium frets
  • Number of frets: 24
  • Bridge: Mono-rail II bridge
  • Neck pu: Bartolini BH1 neck pu (Passive)
  • Bridge pu: Bartolini BH1 bridge pu (Passive)
  • Equaliser: EQB-IIIS 3-band eq w/Mid frequency switch
  • Nut: BLACK TUSQ XL nut
  • Hardware color: Cosmo black
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  • Customer Reviews

Review Snapshot

by PowerReviews
IbanezBTB686SC Terra Firma 6-String Electric Bass

(based on 3 reviews)

Ratings Distribution

  • 5 Stars



  • 4 Stars



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  • 2 Stars



  • 1 Stars



Reviewed by 3 customers

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(2 of 2 customers found this review helpful)


Ibanez wins with the Terra Firma

By Ron

from Soquel, Ca.

Comments about Ibanez BTB686SC Terra Firma 6-String Electric Bass:

I was pleasantly surprised to see one in stock at the San Jose Ca. store. I wasn't planning on purchasing as I was still paying off my Markbass rig, but after playing it for over an hour, I was sold. It was probably shipped with Elixers or some similar type coated string because they sounded brand new, unlike all the other basses that hang on GC walls. Anyone who shops GC knows that the basses have filthy strings and fairly bad action. The action on the Terra Firma wasn't too bad. I knew I'd be able to tweak to my taste at home. The bass sounds amazing. I love love love the mid selector switch. The 250hz select is sweet! Tone for days. I've gigged with it exclusively since I've purchased it. It's the best production bass I've ever played. I get compliments on it every gig. My only gripe is the battery connect seems very flimsy. Other than that, I am glad I made the purchase. No buyers remorse. I have a friend who bought one on my recommendation and is just as pleased as I.


Great sounding / playing instrument, but quality issues

By Craig

from Jacksonville, FL

About Me Experienced

Verified Buyer


  • Good Feel
  • Good Tone
  • Solid Electronics


  • Poor Quality Craftsmanship

Best Uses

    Comments about Ibanez BTB686SC Terra Firma 6-String Electric Bass:

    Unfortunately, Ibanez has discontinued this model. It has great playability, the expected "fast" neck that Ibanez is known for, and an extensive range of tones. However, the instrument I received should never have passed inspection at the factory. The Rosewood top had rough and uneven edges, which was a major cosmetic disappointment. I'm returning the instrument . Since there are no more of these new "in box",the only replacements are floor models from stores - which GC should not be trying to sell as new. I'll have to wait for the new model arriving in May with the Burl top (which is not as nice as the Rosewood).


    I absolutely love this bass.

    By DT

    from Norman, Oklahoma

    About Me Experienced

    Verified Buyer


    • Fun To Play
    • Good Feel
    • Good Pick Up
    • Good Tone
    • Solid Electronics


      Best Uses

      • Jamming
      • Practicing

      Comments about Ibanez BTB686SC Terra Firma 6-String Electric Bass:

      You get what you pay for. One of the best investments I've made.

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