Ibanez produced the TS9B Tube Screamer Bass Overdrive as a bass-specific variant of the classic TS9 Tube Screamer circuit, positioned to give bassists access to the overdrive character associated with the Tube Screamer platform while preserving low-end presence and feel.

The TS9B provided five controls — Drive, Mix, Bass, Treble, and Level — giving the player independent adjustment of overdrive amount, the blend of clean and effected signal, low and high frequency response, and overall output. The inclusion of a Mix control allowed the original dry bass signal to be retained underneath the driven tone, a practical consideration for maintaining fundamental weight. According to the original product copy, the control range spanned from light harmonic saturation through to vintage fuzz textures.

Owners requiring adjustment, repair, or component-level service on the TS9B should consult a qualified guitar or electronics technician familiar with effects pedal circuitry.