Source Audio ZIO Analog Bass Preamp + DI

Source Audio ZIO Analog Bass Preamp + DI
Product no: 9000-0122-0110

Service promise

Bax Music Warranty: This product comes with a 3-year warranty.

This product comes with a 3-year warranty.

General

Sculpt your bass sound in great detail with the Source Audio ZIO Analog Bass Preamp/DI and enjoy naturally overdriven sound packed out with ample punch and grit. This quality pedal works exceptionally well in combination with an amplifier but can just as easily serve as a standalone preamp/DI. Shaped with the help of high-quality Burr-Brown op-amps, the rich, dynamic output is backed up by more than enough headroom and is perfect for warm-and-punchy, vintage-style sound.

Clean Up Muddy Frequencies With The Focus Control

The fitted Bass and Focus controls help deepen your sound without muddying the lows. The Focus knob essentially functions like a high-pass filter for eliminating unwanted frequencies, while the Treble control does the opposite and boosts the high frequencies. Simply find the sweetspot and you're left with a supple attack and perfectly balanced sound.

Natural Drive Thanks to Grit and Scoop Switches

Source Audio has mounted a Grit switch so you can instantly turn on the magical effect of the 'breakup' that happens when a vintage amplifier is pushed to the edge to produce a natural overdrive. This not only gives your sound a dirty edge, but results in a fierier response. The ZIO also sets you up with a Scoop switch, which simulates the EQ curve of the 'Pultec trick' that studio engineers would pull off back in the '50s to boost the mid-range frequencies without muddying the sound. Here, it basically functions like a natural-sounding high-pass filter that you can flip on as needed.

Specifications

Product features

Adapter included	yes
Centre positive/negative	centre negative
Sustainable product	not specified
Guitar preamp functions	boost / gain / level, tone control, DI, ground lift
Mini pedal	no
True bypass	yes
Power supply plug	barrel 2.1 mm (inner diameter)
Type of distortion	overdrive
Variable voltage	no
Can be powered by battery	yes
Voltage	9 V
Equipped with tube	no

Weight and dimensions including packaging

Weight (incl. packaging)	515 gr
Dimensions (incl. packaging)	15,5 x 13,0 x 8,0 cm

Product specifications

bass preamp/DI box
extremely low noise
12V high-voltage rails, compatible with passive and active basses (runs on a standard 9V battery)
complete tone-shaping controls with high-pass Focus control
Grit and Scoop modes
XLR DI with ground lift function
true bypass
headphone output
brushed anodised aluminium housing
dimensions: 11.4 x 11.4 x 5.1cm
weight: 0.45 kg
included: 9V power supply

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Reviews from other countries

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Ilya July 18, 2026

Wrote the following about Source Audio ZIO Analog Bass Preamp + DI

It sounds really big and powerful. I've had several preamps in the past, this one is so far my favorite. It is very straightforward in it's configuration, it heats up the sound nicely and even my bandmates immediately praised how the bass tone became move massive and powerful without being over the top.
Also used it for recording in studio - went fine, sound engineer was quite happy :)

Ron Lekkerkerk January 24, 2025

Wrote the following about Source Audio ZIO Analog Bass Preamp + DI

Met de Source Audio ZIO bass preamp + DI splits ik het signaal van mijn bas naar mijn versterker op het podium en als DI, naar het mengpaneel in de kerk. Doordat ik het geluid nu kan vormen met de knoppen op de ZIO, is de geluidskwaliteit voor het mengpaneel stukken beter dan eerst met een universele DI.
Ik gebruik de ZIO in combinatie met een 5 snarige actieve bas en met een 4 snarige passieve bas. In beide gevallen functioneert de ZIO naar volle tevredenheid.