EBS MicroBass 3. Pro-level tone, wherever you play.

The MicroBass 3 is a premium 2-channel analog preamp that lets you take control of your sound—no matter the backline. Built on the legendary EBS HD360 and Fafner II amp platforms, it’s engineered in Sweden with top-tier components and designed for maximum reliability.

Versatile by Design:

Clean and Drive channels—run in series or parallel

Dual XLR outputs for simultaneous pre/post EQ or stereo FX return

Works seamlessly with any power amp at pro mixing console level

High 10 MΩ input handles passive, active, or piezo pickups

All-in-One Powerhouse:

Built-in tuner for fast adjustments

Onboard compressor from EBS amp heritage

Stereo FX loop support

Tour-ready build with studio-grade performance

The MicroBass 3 gives you consistent tone and complete control—on stage, in the studio, or anywhere in between.

Features

• Preamp: 100% analog professional preamp
• Channels: Dual channels – Clean and Drive
• Channel Configuration: Run in parallel or series
• Blend Control: Blend control for the drive
• Balanced XLR Output: Dual Balanced XLR-out (pre & post EQ or Stereo)
• Effects Loop: Effects loop (mono or stereo)
• Filters: Character and Bright filters (clean channel)
• Drive Engines: HI or LO gain drive engines
• Drive Type: Thin or Deep type (drive channel)
• Additional Outputs: Tuner, Aux-input, Headphones out
• Input Impedance: 10 Mohms input impedance (main input)
• Power Supply: 9V DC, 450 mA required (power supply included)

Specs

Clean Channel

Input Impedance:

• Parallel mode 1.5 Mohms, 44 pF
• Serial mode 10 Mohms, 22 pF

Gain:: Gain Range min/max -∞ / +30 dB; Gain Peak LED +10 dBv

Frequency Response::+0 / -3 dB 20 – 20,000 Hz

Character:: Filter Type Shelving High/Low Pass; Gain: Lo +6 dB @ 80 Hz, Mid -2 dB @ 900 Hz, Hi +3 dB @ 7.5 kHz

Bright:: Filter Type Shelving; Gain: +10 dB @ 10 kHz

Filter Section:

• Bass Filter: Type 12 dB/oct. Shelving, Gain Range +/- 18 dB @ 60 Hz;
• Middle Filter: Type Bandpass Filter, Frequency Range 50 – 5,000 Hz, Q – Boost 0.5 – 1.3, Q – Cut 0.5 – >5, Gain Range +/- 12-15 dB;
• Treble Filter: Type Shelving, Gain Range +/- 18 dB @ 8 kHz

Comp/Limit:: Comp Gain 0 dB, Attenuation max 24 dB, Compression Ratio max 3:1, Attack (80%) typ <10 ms, Release (80%) typ 100 ms

Drive Channel:

Input Impedance:: 1.8 Mohms, 22 pF

Drive:: Gain Range 40 dB

Engines:

• Lo: Type 2nd harmonics soft;
• Hi: Type Symmetrical 2-stage with +18 dB gain

Drive type: Thin/Normal/Deep Pre Drive EQ

Filter Section:

• Tone Filter: Type 6 dB/oct. Low Pass,
• Frequency Range 700 – 20k Hz;
• Middle Filter: Type Bandpass Filter, Frequency Range 100 – 4,500 Hz, Q 1.2, Gain Range +/- 15 dB

Effects Loop: Loop Signal Level nominal -10 dBv, Gain Unity (1:1), Output Impedance <100 ohms, Input Impedance >200 kohms, 22 pF Phones Out: Recommended Impedance 32 – 200 ohms

Aux Input: Input Impedance 20 kohms, Nominal Level -10 dBv

Output: Output Impedance <1 kohms, Signal Level nominal 0 dBv

Balanced Outputs: Output Level nominal -20 dBv, XLR Connections 1-GND, 2-Hot, 3-Cold, Options Pre/Post EQ, L/R Ch. in stereo mode

Auxiliary Info: Power Requirements Idle 450mA @ 9V, Max 750mA @ 9V (with headphones at max output level)

Dimensions (WxDxH): max 168 x 124 x 53 mm / 6.6″ x 4.9″ x 2.1″

Weight: 660 g (1.5 lbs.)