Grace Design FELiX 2 Channel Mic Preamp Black  From Grace

The FELiX is an incredible 2 channel preamp, with EQ, blending and configurable DI output sources!

Grace Design


Retail:  $1,095.00

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Manufacturer's Description from Grace

Studio Quality 2 Channel Instrument & Mic Preamplifier / Blender / EQ

Felix is our new, studio quality 2 channel blending acoustic instrument and mic preamp, designed for working musicians, engineers, sound companies or venues looking for the highest quality solution for amplifying stringed instruments. Felix is built into a roadworthy (beer-resistant) floor unit chassis of anodized aluminum and steel, portable enough to leave the rack at home but bring studio quality to the stage. With the same stunning audio performance and legendary reliability as Grace Design’s pro audio range, Felix brings open, musical and nuanced preamplification to any performance situation.

A powerful eq section allows simple and intuitive tone shaping for even the most unruly of instruments. Each channel’s variable high pass filter cuts 12dB per octave from 20Hz to 1kHz, and can also be set as a notch filter for chasing down problem feedback or rumble areas. Parametric mid range controls cover from 70Hz all the way to 8KHz. While fixed low and high controls are carefully voiced for musical shading of bass and treble.

Controls are simple and clearly marked on a bright panel, making them easy to read and tweak on a dark stage. Footswitch functions include a mute / tune switch for muting all outputs except the dedicated tuner out, a boost switch which activates a variable boost circuit, and finally, an A/B mode switch for when Felix is in A/B mode (which simply toggles between the two different channels).

Felix brings the kitchen sink approach to I/O. Inputs include a 48V XLR mic input and two instrument inputs. Two independent transformer isolated DI outputs can be sourced from either the mix or the individual channel. This allows you to send the front of house a mix or each channel independently. A dedicated, level controlled amplifier output can be sourced from the mix or channel 2. A dedicated tuner output stays active when all the other outputs are muted. A side panel mounted 1/8” mini jack headphone amplifier is there for practicing, private noodling during boring soundchecks, or scrutinizing dubious eq decisions. A TRS insert is included for adding effects, and finally, a remote footswitch jack is included if Felix is going to spend his life in a rack or up off the floor.

Guitar, bass, fiddle, mandolin, cello, dare we say banjo, that weird 3 string gourd thing - Felix is your instrument’s new best friend. Flexible, reliable, a good listener and eager to make you sound better, he is also your new best friend.

Designed and built by family and friends in sunny Lyons, CO, USA.


  • Open, musical and detailed instrument and mic preamplification for discerning artists and engineers
  • 2 channel audio path with blend output control
  • m101 style transimpedance microphone preamplifier, no electrolytic capacitors in the signal path
  • Ultra precision 0.5% thin film resistors are used in the signal path
  • Careful power supply design and grounding yield an ultra-quiet signal path and professional level headroom and line driving ability
  • Fully ground isolated DI outputs with high quality, low distortion, fully shielded transformers
  • Super rugged 1/4” connectors with heavy duty metal bushings
  • Powerful, independent EQ on both channels – hi and low shelving and full parametric midrange
  • Mid frequency control has two ranges 70-880Hz / 6670 - 8kHz
  • 20Hz-1kHz sweepable HPF on both channels, can also be set as notch filter
  • A / B footswitch for multiple instrument configurations or soloing different pickups
  • Mute/ tune footswitch mutes all outputs except dedicated tuner out
  • Boost footswitch for variable 10dB level boost (global)
  • DI outputs sources are configurable - Ch1 (mix or Ch1) Ch2 (mix or Ch2)
  • Dedicated level controlled stage amp output (configurable as blend or Ch2)
  • Dedicated tuner out, remains hot when unit is muted
  • Side panel switches for 48V, phase, mid Hz range select, HPF/notch select, 12V and A/B mode select
  • 12V mic input power available on Ch2
  • Phase reverse switch for each channel
  • 3 input impedance settings on each channel – Ch1 10K, 1MEG, 10MEG / Ch2 332K, 1MEG, 20MEG accommodating a wide range of pickup types
  • Aux footswitch jack for accessing switch functions if Felix is mounted in a rack tray or on top of an amp
  • Mic stand flange mount screw holes holes for putting Felix on a mic stand
  • 1/8” headphone jack, active when Felix is muted
  • Global TRS effects insert jack
  • Universal 100-240 AC power supply with standard IEC cable – no wall wart - take Felix anywhere in the world!
  • Full 5 year transferable warranty / built for long, happy life on the road
  • Designed and built by family and friends in Lyons, CO, USA
Grace Design

About Manufacturer

Audio engineer/designer Michael Grace originally began building single order custom audio products for a small, devout following of recording engineers and artists is 1990. Before long, the word had spread about Michael's custom microphone preamplifier designs, which were said to outperform anything else that was commercially available. Based on an increasing demand for his mic preamp design, in 1994 Grace Design was founded and began production of the original 801 mic preamp. Not only did the 801 provide a new level of audio performance and functionality, it helped to establish outboard microphone preamplifiers and direct-to-tape recording as a new standard in professional audio production. Over the years, Grace Design has maintained a steady, methodical pace to developing new products and technologies. Our product line has evolved into a definitive collection of microphone preamplifier configurations and other unique professional audio products. While the professional audio industry is inundated with products seemingly designed for obsolescence, we pride ourselves on providing audio professionals with the finest tools imaginable. Located in Boulder, Colorado, Grace Design continues its mission into the new millennium. As our company grows, we continually strive to improve our production methods to make sure theya re exact, efficient and environmentally sound. Their employees are treated like family and they strive to improve our production mehods to make sure they are exact, efficient and environmentally sound. Our employees are treated like our family and we strive to maintain our business relationships as friendships. And above all, we remain driven by the original passion that founded the company- the love of music.


GAIN RANGE (Input to DI Output)

CH1 Mic input 21-62dB

CH1 Instument input Low Gain: 3-44dB

High Gain: 21-62dB

CH2 Instument input -1.5-36.5dB

Boost 0-9dB

THD+N 1kHz, 22Hz-22kHz BW (MIC Input to DI Output)

@ 20dB Gain +10dBu out <0.0045%

@ 40dB Gain +10dBu out <0.0050%

@ 60dB Gain +10dBu out <0.010%


@ 40dB Gain +10dBu out  <0.05%


50Ω source<-128dB

CMRR @60dB Gain





Mic input @ 40dB Gain -3dB20Hz – 65kHz

Inst input @ 20dB Gain -3dB20Hz – 65kHz


CH1 MIC Input 8.1kΩ

CH1 Inst Input HI: 10MegΩ

MED: 1MegΩ

LOW: 10kΩ

CH2 Inst Input HI: 20MegΩ

MED: 1MegΩ

LOW: 332kΩ

Insert Input10kΩ

DI Outputs150Ω

Amp, Tuner, Headphone and Insert Outputs150Ω


Green threshold-10dBu

Red threshold+10dBu



CH1 InstLow Gain: +21dBu

High Gain: 0dBu

CH2 Inst+20.5dBu

MAXIMUM OUTPUT LEVEL - 100k Ohm load, 0.1% THD

DI OutputsLine: +20dBu

Mic: -6dBu

Amp, Tuner, Headphone and Insert Outputs+22dBu

High Pass Filter / Notch Filter

High Pass Filter20Hz – 1kHz @ -12dB/octave

Notch Filter 20Hz – 1kHz, >-35dB, Q>1.0


Gain+/- 12dB

Low Frequency Low Range: 125Hz Shelving

High Range: 250Hz Shelving

Mid Frequency Low Range: 70Hz – 880Hz

High Range: 670Hz – 8kHz

Mid Frequency Q0.5 – 5

High Frequency 2kHz Shelving


CH1 MIC Input (50 ohms) to DI Output<-88dBu

CH1 Inst Input to DI Output<-88dBu

CH2 Inst Input to DI Output<-98dBu


MUTE (TIP)Momentary – Normally Open – Switch to GND < 10Ω

BOOST / TOGGLE (RING)Momentary – Normally Open – Switch to GND < 10Ω


100-240VAC 50/60Hz10 Watts Max


3.2lbsH3.0” x W9.5” x D5.5”

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