The Behringer BM-15M Murf Box is an analog resonance filter pedal that adds movement to your signal through rhythmic filter sequencing. Behringer describes it as a resonance filter with "powerful filter sequencing which rhythmically animates your sound across 12 dynamic patterns," designed to bring motion, groove and life to your sound1. Guitar World called it "a box full of analog circuitry and rich harmonic saturation"2.
It is a recreation of Moog's Moogerfooger MF-105M MIDI MuRF, a discontinued filter pedal, launched by Behringer on 27 June 2025 at $12923. As of July 2025 it was in production and arriving in stores3.
What it does
The Murf Box is a filter sequencer rather than a simple wah or envelope filter. Instead of one filter sweeping in response to your picking, it runs a bank of resonant filters through selectable patterns, so the animation of your tone happens in rhythmic steps. Behringer's product page frames it as 12 dynamic patterns of filter sequencing1, while Guitar World describes it as adding movement to a guitar signal "via its warping filters, selectable patterns, and expressive modulation"2.
The controls, as reported by Guitar World2:
| Control | What it does |
|---|---|
| Envelope dial | Sets staccato or legato-style transitions between filters |
| Mix dial | Blends filtered and dry signal |
| Rate dial | Sets the speed of the pattern |
| Drive dial | Pushes the harmonics |
| Pattern dial | Selects the filter sequencing pattern |
| Output dial | Sets output level |
| Frequency mini-switch | Switches the Frequency between Bass and Mid modes |
| LFO mini-switch | Toggles the LFO feature on and off |
Gearnews also notes a tap/step input and a drive control for pushing the harmonics, alongside selectable preset patterns, MIDI sync, and a range of real-time controls3. An expression pedal can be paired with it for what Guitar World called "a more organic manipulation experience of what this thing can do"2, and Behringer's own page says an expression pedal lets you take more control over the ever-evolving sound1.
The enclosure follows the original: Guitar World notes the same wooden side panels and black interface as the source material2.
The MIDI MuRF it recreates
The BM-15M is Behringer's recreation of the Moog MF-105M MIDI MuRF3. Vintage Synth Explorer describes the original as "a filter sequencer, capable of creating animated filter effects across eight frequency bands," with applications ranging from morphing drones and stuttering lead lines to filtering drum patterns and space age sequences4.
The MIDI MuRF's headline feature was its MIDI In, which "allows perfect MIDI-clock synchronization with DAWs, drum machines, and other devices"4. Its other documented features, per Vintage Synth Explorer4:
- Envelope: rotary envelope control
- LFO: off/on switch
- Effects: drive
- Polyphony: monophonic
- Multitimbral: 1 part
The Murf Box carries the MIDI idea forward with MIDI sync and a USB-C connection, so you can interface with the latest gear3. Behringer's product page likewise lists USB/MIDI control as part of the pedal1.
What reviewers said
Guitar World called the BM-15M "weirdly wonderful" in its launch coverage2. In gearnews' budget effects roundup, Stefan Wyeth wrote:
"Overall, the Murf Box captures the magic of the MIDI MuRF, making it flexible enough for use on almost any instrument"3
That flexibility point is worth noting for bass players and synth players as well as guitarists: the pedal is not described as guitar-only, and the Bass/Mid Frequency switch suggests it is voiced for more than one register2.
Where it sits in Behringer's filter line
The Murf Box is one of several Behringer filter releases in this period. The company launched the B-Tron III Envelope Filter, a Mu-Tron III clone, at $69 in February 2025, and its Meatball envelope filter, a clone of the 1995 Lovetone Meatball, was announced as available in January 2026. The BM-15M sits alongside these as the pattern-sequencing option in the range, where the B-Tron III and Meatball are envelope followers that react to your playing dynamics.
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Questions
Does the Murf Box have MIDI?
Yes. The BM-15M has MIDI along with a USB-C connection, so it can interface with modern gear. It offers MIDI sync among its real-time control options, echoing the MIDI In of the original Moog MF-105M MIDI MuRF, which allowed MIDI-clock synchronization with DAWs, drum machines and other devices34.
Can I use an expression pedal with the Murf Box?
Yes. Behringer says an expression pedal lets you take more control over the ever-evolving sonic landscape, and Guitar World reported that pairing the Murf Box with an expression pedal offers a more organic way to manipulate what the pedal can do12.
How much does the Behringer Murf Box cost?
The BM-15M Murf Box is priced at $1292. Gearnews later listed it at $129.00, £114.00 and 137.00 euro5, so the US price has held at $129 since launch.
Does the Murf Box have USB-C?
Yes. Besides MIDI, the Murf Box has a USB-C connection, which lets you interface with the latest gear3. Behringer's product page also describes USB/MIDI control as part of the pedal's feature set1.
Can the Murf Box be controlled with CV?
The published sources do not describe a CV input. What they do describe is a tap/step input, which can step the filter patterns, along with a drive control for pushing the harmonics3.
Sources (5)
- BM-15M RESONANCE FILTER, Behringer
- Behringer's BM-15M Murf Box revives the Moog OOP MuRF, Guitar World, 2025-06-27
- The Best Budget Effects Pedals for Electronic Music Production, gearnews.com, 2025-07-02
- Moog MF-105M MIDI MuRF, Vintage Synth Explorer, 2026
- Behringer BM-14M: Analog Bucket Brigade Delay is Back in Stock, gearnews.com, 2026-07-01
