Fishman says:

The ToneDEQ Preamp EQ is a complete performance solution for the acoustic musician. With a high-quality preamp, dual effects section, tone controls, a compressor, level booster and a balanced D.I. — it’s got everything you need in one box.

Pure Analog Circuitry
Its analog signal path goes from end to end — from preamp to output — to give acoustic musicians a richer tonal quality. Even the digital effects are mixed in parallel so they don’t affect the purity of your acoustic instrument.

Fully Balanced Stage D.I.
Flexible outputs include a 1/4″ amplifier output and XLR D.I. output for the lowest noise possible. Plus the D.I. features automatic ground-lifting and selectable pre/post EQ settings.

Discrete Class-A Preamp
With Fishman, you get quality discrete class-A signal conditioning created by the leader in instrument preamp design. The high-impedance input is a must when using a passive instrument pickup.

Advanced 4-Band EQ
Legendary 4-band equalizer design provides superior tone control for any acoustic instrument. The variable low-cut filter controls sub-bass effects produced by some passive pickups.