The SA-DI1 passive direct box solves signal matching problems for guitarists, keyboardists, and sound engineers who need to connect high-impedance instruments to mixing consoles and PA systems. This compact steel DI box converts unbalanced instrument signals into balanced low-impedance XLR outputs that mixers can handle effectively.

The SA-DI1 transforms your guitar, bass, or keyboard signal into a balanced 600-ohm output that travels cleanly through long cable runs without noise or signal loss. The three-position attenuator switch (0dB, -20dB, -40dB) lets you match output levels precisely to your mixer's input requirements, preventing overload distortion from hot signals.

Built with solid steel construction measuring 4.75" x 3" x 1.75", this DI box features a 50K unbalanced instrument input, parallel link output for feeding your amp simultaneously, and balanced XLR output for the mixer. The switchable ground lift eliminates hum from ground loops, a common problem when connecting instruments to sound systems.

Perfect for live sound applications, church services, club gigs, and studio recording where you need to send instrument signals to the mixing board while maintaining your stage amp connection. Works equally well for DJ setups where you need to convert unbalanced mixer outputs to balanced signals for PA system connection.

Connect your instrument to the input jack, run XLR to your mixer, and optionally use the parallel output to feed your amplifier. All necessary connections use standard 1/4" and XLR cables (sold separately). Backed by Seismic Audio's one-year warranty and fast shipping.

Technical Specifications

Frequently Asked Questions

What's the difference between the three attenuator settings?

The 0dB setting passes your signal unchanged, -20dB reduces it by 20 decibels for moderately hot signals, and -40dB provides maximum attenuation for very strong outputs like active pickups or line-level sources. Start with 0dB and switch to higher attenuation if your mixer's input overloads or distorts.

Can I use my amp and send to the mixer at the same time?

Yes, the parallel output jack lets you connect to your amplifier while simultaneously sending signal to the mixer through the XLR output. This is standard practice for live performance where you want both your stage sound and the house PA system fed from your instrument.

What cables do I need to use this DI box?

You'll need a standard 1/4" instrument cable from your guitar or keyboard to the DI box input, and an XLR cable from the DI box to your mixer or PA system. If using the parallel output for your amp, you'll need an additional 1/4" cable.

When should I use the ground lift switch?

Engage the ground lift if you hear hum or buzz when the DI box is connected. This commonly occurs when your amplifier and the PA system have different ground potentials, creating a ground loop. The ground lift breaks this loop while maintaining signal integrity.

Will this work with active pickups and high-output instruments?

Yes, the SA-DI1 handles high-output sources through its attenuator switch. Active pickups, hot humbuckers, and line-level keyboards can all be accommodated by selecting the appropriate attenuation level (-20dB or -40dB) to prevent mixer input overload.

WARNING: This product can expose you to chemicals including Di(2-ethylhexyl)phthalate (DEHP), which is known to the State of California to cause cancer. For more information, go to: www.P65Warnings.ca.gov