Description
Slap harder, dig in on a fill, or roll off your thumb technique – the LMB-3 keeps your signal from spiking out of control while quietly reinforcing the frequencies that make your bass cut through a mix. This isn’t a generic compressor ported over from guitar; Boss engineered the limiter and enhancer circuits specifically around electric bass behavior, so the clarity boost lands where low end actually needs it.
This unit is open box mint – previously opened for inspection or display, showing no signs of use, and functioning exactly like new.
Why bassists reach for it:
- Threshold and ratio knobs give you hands-on control over your instrument’s dynamic range, so hot notes stay in check without squashing your tone
- Dedicated enhancer circuit adds presence and definition, helping your low end stay audible on stage and in the mix
- Runs on a 9V battery or optional AC adaptor – simple, reliable power for any rig
- Backed by Boss’s five-year warranty
Specs at a glance:
- Nominal Input/Output Level: -20 dBu
- Input Impedance: 1 M ohms / Output Impedance: 1 k ohms
- Recommended Load Impedance: 10 k ohms or greater
- Residual Noise Level: -86 dBu (IHF-A, Typ.)
- Current Draw: 17 mA (DC 9V)
- Size: 73mm (W) x 129mm (D) x 59mm (H) / Weight: 430g including battery
- Includes a 9V dry battery; AC Adaptor (PSA-Series) sold separately
Whether you’re locking in a pocket-heavy groove or need a safety net for an aggressive slap style, the LMB-3 quietly does its job so your bass tone stays even, present, and gig-ready.









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