# Fishman Loudbox Micro (PRO-LBT-400) 40W acoustic combo amp

Pefectly fitting for its name, the Loudbox Micro packs 40 watts of clean acoustic power into a lunchbox-sized acoustic combo that weighs under 10 pounds! You get all the tonal benefit of Fishman’s legendary preamp and tone control design in a tiny amp that's great for practice, suitable for stage monitoring, and excellent for DI output to a PA.

A sealed cabinet design paired with a bi-amplified driver configuration generates rich, full tone from your instrument. It features both a dedicated microphone channel plus an instrument channel so that you can separately control two inputs.

Use the high-quality digital reverb and chorus on the instrument channel to create space and textures while reverb is there for the ready on the microphone channel. Loudbox Micro also includes an aux input, a balanced XLR D.I. output, and a headphone jack when you want to play quietly.

With Loudbox Micro, aspiring acoustic musicians are finally able to experience the dynamics and quality sound of more expensive Loudbox models in an easy to use amp that’s inspiring to practice and record with.

  
  

### Features

-   40 Watts with Master Volume
-   Two channels:
    1.  Instrument Channel
        -   1/4” input for active or passive pickups
        -   Feedback-fighting Phase switch
        -   3-band EQ: low, mid, high tone controls
        -   Reverb level
        -   Dual-function Chorus
    2.  Mic Channel
        -   XLR input for dynamic microphones
        -   2-band EQ with low and high tone controls
        -   Reverb level
-   Digital Reverb & Chorus
-   1/8” Auxiliary Input
-   Balanced XLR D.I. Output
-   3.5mm Headphone Output

### Specs

Model Number

PRO-LBT-400

Power

40W, Bi-Amplified

Channels

Two: Instrument & Microphone

Drivers

5.25 inch Poly Cone Woofer, 0.8 inch Soft Dome Tweeter

Effects

Reverb and Dual-Function Chorus

Aux Inputs

3.5mm Input

Outputs

Balanced XLR D.I. Output, 3.5mm Headphone Output

Input Impedance

Instrument 10 MΩ  
Microphone 2 kΩ  
Aux Input (stereo) 10 kΩ

Dimensions

8.1” D x 10.4” W x 9.5” H (206mm D x 264mm W x 242mm H)

Weight

9.1lbs (4.1kg)

  
  

Includes [Fishman Limited Lifetime Warranty](https://www.fishman.com/warranty/)

## Details

- **Price:** 289.95 USD
- **Vendor:** Fishman Transducers, Inc.
- **Tags:** Amplifiers, Combo Amps, Discount eligible, Fishman Amplifiers, Gear & Accessories, Practice Amps, Shop by Brand Amplifiers

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 289.95 USD | In stock |

## Images

- Fishman Loudbox Micro (PRO-LBT-400) 40W acoustic combo amp - Electric Violin Shop
- Fishman Loudbox Micro (PRO-LBT-400) 40W acoustic combo amp - Electric Violin Shop
- Fishman Loudbox Micro (PRO-LBT-400) 40W acoustic combo amp - Electric Violin Shop
- Fishman Loudbox Micro (PRO-LBT-400) 40W acoustic combo amp - Electric Violin Shop
- Fishman Loudbox Micro (PRO-LBT-400) 40W acoustic combo amp - Electric Violin Shop
- Fishman Loudbox Micro (PRO-LBT-400) 40W acoustic combo amp - Electric Violin Shop
- Fishman Loudbox Micro (PRO-LBT-400) 40W acoustic combo amp - Electric Violin Shop

---

> Source: [Electric Violin Shop](https://electricviolinshop.com/products/fishman-loudbox-micro-acoustic-instrument-amplifier)
> Updated: 2026-07-09