the BiX single preamp and DI


Acoustic Instrument Preamp, EQ, DI and Boost

billy strings“Stoked to be using the Grace Design BiX. This thing sounds natural and full. It’s very responsive and catches all the little nuances that I love about my acoustic guitar.”

– Billy Strings

In a few short years, FELiX and AliX have become the preamps of choice for discerning touring and recording musicians. From Banjo to bass players, they enable performers to perfect their stage and studio sound beyond what was previously possible.

And now directly from this lineage comes BiX, which shares the exact same DNA of its bigger siblings, but with an intelligently streamlined feature set and a price that puts it in reach of any performer, whether on their way to the local coffee shop or the megadome.

Billy Strings
the BiX single preamp and DI
BiX instrument preamp angle shot

Controls are dead simple – input gain, high and low shelving EQ, and a 10dB variable boost circuit, with footswitches for mute and boost. I/O includes the instrument input, separate send and return insert jacks, an unbalanced line output, and a balanced ISO DI output on XLR. For enhanced EQ control, rear panel DIP switches select between two different transition frequencies for both High and Low controls. And BiX is pedalboard friendly, with a 9VDC power input and a compact, rugged low-profile chassis.

Sonically, BiX is a carbon copy of its bigger siblings, with crystal clear, ultra-quiet audio performance. A better than 30VDC internal operating voltage provides for incredible headroom. The highs are smooth and open, and the lows are deep and rock solid. The dynamics and tone of the instrument come alive with clarity and realism, which translates to creating a deeper bond between you and your instrument.

Gain Range
Line Output0dB to +37dB
DI Output, Level: Line-29dB to +8dB
Boost0dB to +12dB
THD+N 22Hz-22kHz BW
1kHz @ 0dB gain +10dBu out<0.002%
1kHz @ 20dB gain +10dBu out<0.002%
1kHz @ 36dB gain +10dBu out<0.005%
Intermodulation Distortion SMTPE/DIN 4:1 50Hz, 7kHz
@36dB gain +10dBu out< 0.008%
Frequency Response
Line output @ 20dB Gain -3dB10Hz – 185kHz
DI Output @10Hz – 40kHz
I/O Impedance
Instrument Input10MΩ / 1M Ω with TRS input cable, tip and ring shorted
Insert Input200Ω
Insert Ouput150Ω
Line Output150Ω
DI Output150Ω
Green Threshold-13dBu
Red Threshold+12dBu
Maximum Input Level
Instrument Input+22dBu
Insert Return (0dB Boost)+22dBu
Maximum Output Level – 100k Ohm load, 0.1% THD
Line Output+22dBu
DI Output (Mic)-7dBu
Insert Output+22dBu
Low Frequency (Low Range)100Hz
Low Frequency (High Range)200Hz
High Frequency (Low Range)2kHz
High Frequency (High Range)4kHz
Dynamic Range 22Hz – 22kHz BW
Minimum Gain, Line Out129dB
Minimum Gain, DI Out129dB
Minimum Gain, Line Out-107dBu
Minimum Gain, DI Out<-120dBu
Maximum Gain, Line Out-78dBu
Maximum Gain, DI Out-106dBu
Connector2.1mm Center Negative
Nominal Input Voltage9VDC
Nominal Input Current150mA
Input Voltage Range6VDC – 12VDC
Weight and Dimensions
1.2lbs (0.55kg)H2.5″ x W5.1″ x D4.5″ (H6.35cm x W13.0cm x D11.4cm)
  • 1/4″ high impedance input
  • Separate FX send and return
  • 1/4″ unbalanced line output
  • Balanced XLR DI transformer iso output
  • 10dB variable boost
  • Mute and Boost footswitches
  • High and Low shelving EQ
  • Selectable EQ transition frequencies
  • 9VDC operation
  • Over 30V internal operating voltage
  • Pedalboard friendly design
  • 5 year transferable warranty
  • Made in the USA

The Grace Design EON and STANDARD Warranties

We back up everything we make with either our unrivaled 20 year EON limited warranty, or the 5 year standard limited warranty. These represent the best coverage in the business and prove our commitment to the quality, serviceability and long term value of Grace Design products.

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