EBS OctaBass Studio Edition

“This is the best tracking octaver I've ever come across - it's great to know the lows will be there for you”.

- Tony Levin, bass legend
on the OctaBass Studio Edition

General Specs  Demos & Samples  Reviews Photos


Discontinued edition. For the latest version click here >>



Track the note you play

The pedal recognizes two or three-note chords and trigger the lowest note. Control the level of the original tone and mix in the octave effect. Choose between High, Mid or Low Range - which relates to the character of the sound of the sub-note.

Useful hints

Sub-notes are perhaps most effective when playing on the higher frets, and could add a nice touch just slightly blended into the original tone, especially on a solo on bass or guitar. The OctaBass works really good together with distortion as well, but remember to keep the OctaBass before the drive in the signal chain, so it get’s as clean as possible tone to trigger. If you are after a synth-bass type of sound, a great way to achieve that is to run an OctaBass, combined with an EBS BassIQ envelope filter, and use the ‘Down’mode on the IQ. That makes the impression of hitting a key on a keyboard, and adds that sub-bass as well as synth sound to the tone.

The original EBS effect!

The OctaBass was the very first stompbox effect from EBS. This classic effect was introduced in 1992, and based on an onboard effect featured in the legacy EBS Taurus combo. It has become 'classic' after being a trusted companion to legendary bassists like Tony Levin, Roger Glover, Tal Wilkenfeld & many many more...

The Studio Edition comes with optimized signal path, new design, new signal relay switching technique, protection against overvoltage use up to 18V and the possibility to power the pedal with anything from 9-12V DC.


Ps. Tricks that apply to all analog octave pedals to maximize performance:

  • Octave effects are most commonly used to fatten notes played higher up on the fretboard for fastest possible tracking.
  • If you experience any glitches (or loses the subnote shortly after you play a note) anywhere on the fretboard, learn where these spots are and play the same note on a different position on the fretboard and tracking should be fine. Analog octave effects all suffers from that, although the spots can appear on different positions depending on the model and instrument you use.
  • For cleanest possible tracking; put octave effects first in the chain of pedals.
  • To further improve tracking, passive instruments or passive mode on an active bass can sometimes improve tracking.
  • Other tricks that can be useful if you experience tracking issues with an octave effect is to roll of the highs with the tone control; to roll off the bridge pickup on a Jazz bass when using octave effect; and to play a little softer than usual to avoid that the strings hit frets or pickups in a way that produce unwanted overtones that can mess with the tracking.  
  • On the other hand, analog octave filters are fun to play with and usually sounds fatter than any digital octave effect.


  • Nominal Input Level -8 dBv

  • Input Impedance 700 kohms

  • Dry Bandwidth +0 / -2 dB 20 - 20k Hz

  • Dry Level min / max -oo / 0 dB

  • Dry Noise Level -96 dBv

  • Octaver Bandwidth +0 / -3 dB 10 - 110 Hz

  • Octaver Level Gain min / max -oo / 12 dB min

  • Octaver Filter Slope 18 dB/oct. Low pass

  • Low Pass Triggering Threshold -70 dBv @200 Hz

  • Dimensions (L x W x H) 2.8 x 4.5 x 1.4” (70 x 115 x 35 mm)

  • Weight 400g (0.88 lb.)

  • Bypass True Bypass

  • Power Requirements 9-12 V DC Regulated, 30 mA max

    * EBS Recommend the use of the EBS AD-9+ DC adapter.
    The adapter can supply up to twenty pedals at the same time.

 Demos & Samples 


REVIEW from Bonedo(in German)


"Für Bassisten, die einen relativ subtilen Oktaver suchen, der den Basssound voluminöser und dicker macht, ist der EBS Octabass Studio Edition sicherlich eine gute Wahl." 4,5 out of 5

Read the whole review (external link) >>

REVIEW iGuitar Magazine, issue 36, 2015


“The (Octabass’) high setting adds upper midrange and top end accenting, giving the octave effect grit and presence whereas the lower setting creates a more sub-bass style bottom end that leaves space between the two octaves. The mid setting is just that, melding both signals smoothly”. 

Read the whole review including a down to the core video test here: http://edition.pagesuite-professional.co.uk/launch.aspx?eid=4ff5b8c0-6035-4edc-ba81-01ec6b929760&pnum=198





Preserve the low range

Suitable for live and studio use

Triple Mode Octave Divider

High, Mid and Low Ranges

Controls for Normal and Octave volume

True Bypass Signal Relay Switching

Protected against over voltage up to 18V

Powered by 9 to 12V DC

Optional (not included):
EBS AD-9+ Power Supply

Download the manual >>




'Hall Of Fame
- more than 1000 units sold'

at Thomann.com online shop.