Becos FX CompIQ Pro Yuna

The Becos FX CompIQ Pro Yuna is a soft-knee Blackmer VCA compressor pedal for guitar and bass, a studio-style design built around the same voltage-controlled amplifier architecture as the company's larger CompIQ Pro Stella. Where the Stella puts 13 controls on its surface, the Yuna makes do with 8, folding ratio and threshold into a single Comp control and moving several deeper settings onto internal DIP switches and jumpers¹.

Guitar Pedal X's Stefan Karlsson described it at launch as a pedal that "essentially delivers a slightly more streamlined take on the CompIQ Pro Stella," a soft-knee Blackmer VCA studio-style compressor that gives full coverage with fewer controls and easier dial-in¹. The name is Japanese-inspired: Yu-Na (優結 / ゆな / ユナ), meaning gentle, kind, superior, and binding or gluing².

A soft-knee VCA compressor for guitar and bass

A VCA (voltage-controlled amplifier) compressor works the way studio rack units do: a detector circuit reads the signal level and turns down a gain cell in proportion to how far the input exceeds a threshold. The Yuna uses a Blackmer VCA, the same high-performance gain cell family found across the Becos CompIQ line, including the Stella Pro MK2⁴¹. Its detector is a true RMS-level design, which reads average signal energy rather than instantaneous peaks, with reference levels at -10dBu, -20dBu (the default for instrument level) and -30dBu, set by jumper¹.

The knee is soft only. Soft-knee compression eases in gradually as the signal approaches the threshold rather than clamping at a single point, which tends to make the compression less audible as it works. Players who want hard-knee action as well would need to look at the Stella, which offers both³.

RockBoard's PedalPedia page describes the Yuna as delivering the essential compression and tone-shaping controls bassists and guitarists look for, with high-grade components that give professional sound and lively response without distortions or artifacts². Measured figures from the launch coverage back up the clean-sounding claim: output noise of -95dBV at 0dBV gain, THD of 0.1% at 1kHz with 0dBu in/out through the 6th harmonic (0.18% through the DITOS output), and a flat frequency response from 30Hz to 22KHz¹.

The controls and internal settings

The Yuna's eight surface controls are the working day-to-day set. The deeper configuration lives inside the enclosure¹.

The Comp control is the Yuna's main simplification. Instead of separate ratio and threshold knobs as on the Stella, one knob sweeps both together, which is what makes the pedal quicker to set. The trade-off is granularity: Guitar Pedal X's review of the related CompIQ Pro Mini noted that the streamlined Becos pedals are "less granular than Stella and Yuna" in the Mini's case, positioning the Yuna between the Mini and the full Stella in control depth⁵.

The internal Feed jumper chooses between feed-forward and feed-back topologies. Feed-forward reads the input signal to drive the gain cell, feed-back reads the compressed output; the two behave differently in attack character and maximum ratio¹.

Power and connections

The Yuna runs on a standard 9V internal battery or a 9-12V DC external supply, center negative, with the supply not included¹. Two things matter for pedalboard planning:

Current draw is under 45mA at 9V and under 55mA at 12V¹, modest enough for most isolated power supplies. Connections are a TS input (input impedance greater than 1.1MΩ, so it loads passive pickups lightly), a TS output, and, with the DITOS option, a transformer-balanced output, all at roughly 100Ω output impedance¹. The pedal sits in a genuine Hammond black-powdered aluminum enclosure measuring 61mm long, 102mm deep and 51mm high, weighing 220g, or 245g with the DITOS DI¹.

The DITOS output

DITOS is Becos FX's optional transformer-coupled balanced output, offered alongside the standard TS output on the CompIQ Pro Yuna². The pedal's output impedance is about 100Ω, and the DITOS path measures 0.18% THD against 0.1% for the VCA path¹. It adds a little weight: 220 gr. without the DITOS DI, 245 gr. with it¹. On the maker's pricing, the Pro Yuna lists at €229 without DITOS and €319 with DITOS, excluding VAT¹.

The Yuna's DITOS output is voiced for warm, vintage-style lows and clear, detailed highs². It is an add-on rather than standard equipment, which is reflected in the pricing: €229 without DITOS and €319 with it, excluding VAT, at the October 2025 launch¹; Guitar Pedal X listed the Yuna Pro at $359 in October 2026³.

A simplified CompIQ Pro Stella

The Yuna sits in a Becos FX compressor range that now spans several formats. The original CompIQ Pro Stella, launched in April 2019, was the company's flagship compressor for guitar and bass with rack-style controls⁶⁷. The Stella Pro MK2 of March 2024 refined it with selectable feed modes, four voicing options and the optional DITOS module⁸⁹. The dual-band CompIQ TWAIN and the mini-format pedals fill out the line.

Guitar Pedal X's verdict on the relationship was direct: "The new Yuna is slightly easier to use, and quicker to dial in - wile probably overall 95% the same as the Stella"¹. The same reviewer, writing in October 2026 after living with the pedal, summed it up as "so much easier to get to grips with and dial in!" than the Stella³.

What reviewers said

Published coverage of the Yuna itself is so far concentrated at Guitar Pedal X, whose Stefan Karlsson has reviewed the whole Becos compressor line. His launch piece framed the pedal as full coverage with fewer controls and easier dial-in than the Stella¹, and his October 2026 review repeated the ease-of-use verdict³.

The Stella the Yuna streamlines has its own review record, which gives a sense of what the shared circuit family sounds like. Bass Gear Magazine's review of the Stella Pro MK2 found it "offers more control than many studio units, and it can be overwhelming at first," while noting the manual is clear and time spent learning each control pays off⁹. The Yuna's reason for existing is precisely to soften that learning curve.

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