Mᴼᴺᴱ Masterone






265,00  + VAT

In stock


The Masterone is the first Frap Tools module designed to be connected exclusively with non-Eurorack equipment.

It features four separate output sections with different Neutrik connectors and adjustable gain levels to suit the most common live and studio situations (and even some uncommon ones).

With no inputs and just large-format outputs, it pushes even further the concept behind the M module: being a Eurorack system’s gateway to the outside world.

Key Features

Two XLR connectors (left and right) provide a balanced output with the expected 6 dB extra gain. In many cases, they can allow bypassing a DI box.

These outputs are very similar in concepts to the ones on the M module, but with large ¼” jack connectors. It is possible to patch standard TS cables and use them as unbalanced outputs, or use TRS cables to interface them with balanced equipment (the ground is routed to both the ring and the sleeve, for a better performance than regular unbalanced outputs).

If the two stereo outputs are too hot, a set of switches can attenuate them. The Line/Mic switch on the XLR outputs attenuates them by ~30 dB, while the Line/Inst switch on the TRS outputs attenuates them by ~15 dB.

The Headphones section allows you to monitor the Master output with an independent volume knob and, at the same time, take advantage of the PFL function on the Channels and the Groups. Rotate the PFL crossfader towards the blue section to blend the PFL modules with the Master sum and check if everything is okay before launching the next scene.

Should you need an extra monitor on stage, or run the whole system through a vintage amp in the studio for parallel processing, the auxiliary monophonic outputs is the answer. It provides the sum of both channels in a handy, pseudo-balanced output with a dedicated fader: attenuate the line level by 15 dB, or amplify it by 6 dB.

A detailed VU Meter monitors the signal amplitude from -40 to +15 dB with peak memory on the upper LEDs.

Master Family Comparison

VU meter

2×12 LED

2×5 LED

VU meter peak memory

Pseudo-balanced outputs

¼" TRS

3.5 mm TRS

Balanced output

Stereo/Dual mono

Headphones output

¼" TRS

3.5 mm TRS

Aux input

3.5 mm TRS with PFL

Pseudo-balanced mono output

¼" TRS with fader

PFL circuit

Crossfader latching


Pseudo-balanced output level



Balanced output level


Fader knob

⌀ 20 mm

⌀ 20 mm






12 HP


38 mm

Current draw

80 mA @ +12 V

80 mA @ -12 V

110 mA @ +12 V With headphones at high level (250 Ω)

105 mA @ -12 V With headphones at high level (250 Ω)

Recommended warmup time

30 min

¼" TRS output impedance

≥ 35 Ω (unbalanced)

≥ 70 Ω (pseudo-balanced)

XLR output impedance

≥ 220 Ω (line level)

≥ 440 Ω (mic level)

Maximum output level before clipping

≥ 17 dBu

Output gain scale referred to group output

5 dB

Headphones gain scale referred to group output

7 dB

Frequency response

0.01 to 40 KHz

Harmonic distortion

< 0.3 %

More details on the Manualone.


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