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NEWS: FELiX has been nominated for the 31st TEC award for Outstanding Technical Achievement. Voting will take place online in December, 2015. Please stay tuned for how to cast your vote!


Studio Quality 2 Channel Instrument & Mic Preamplifier / DI / 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.

"Congrats on making a great box. I've been hoping for something of this caliber for years and years. It renders my pedal board of the last several years obsolete and useless. It's easy to use and sounds like I'd hoped. Bottom line - this is the best preamp I've ever used." - Bryan Sutton, six time winner of the IBMA's Guitarist of the Year.

“Man, FELiX sounds great! And it really helps because it eliminates another piece of gear for me. Now, I have everything I need in a single unit: the mic preamp for my acoustic bass, great EQ, and flexible I/O. It works great for my electric bass too. Home-run! Killer!" - John Patitucci - Chick Corea, Herbie Hancock, Wayne Shorter, Stan Getz, Wynton Marsalis, Joshua Redman.

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  • 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 / 670 - 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


    Review - SOS Magazine, October 2015 by Bob Thomas

    Review - Acoustic Guitar, November 2015 by Doug Young

    Review - Recording Magazine

    Review - Pro Sound News

    REMIC Microphones Blog / Ultimate Bass Sound!

    From Sweetwater Sound:

    FELiX is pure Grace for the Acoustic

    So I just plugged in my Jorge De Zofia A1F Cedar Top Flamenco with Carlos Juan Amplification VIP Vicente pickup using a cable from Gerald Rohm in to FELiX by Grace Design and all I can say is WOW just amazing and it sounds like my guitar louder, pure tone and clarity. No smearing of frequencies. I will also be using this with a DPA 4099G on my flamenco guitars. Best preamp I've ever used for nylon strings with a pickup. This is my tone. The clarity of what happens in this box is magic and pure, whatever your putting in (source) gets faithfully represented and not hyped, cut, squashed just preamplifid with clarity. It's really in my mind part of your instrument, not just some box on the pedal board or floor. I waited half a year to hear this and I'm so glad I did not go with some of the others out there. Blows away others I've used and I've used a few. Oh and I just ran FELiX to powered 10in Speaker. Can't wait to set this up on a pedal board and use FELiX with a QSC or Bose. Oh well back to "Just Playing" Thanks to TJ at Sweetwater for getting this out to me so quickly. Will gig with it this weekend.


    Detailed Control for Acoustic Musicians

    The Felix DI/EQ/ Balance box gives remarkable control over sculpting and blending sound. I’m using Felix to blend voice and acoustic string instruments (guitar, cittern, bouzouki). The parametric EQ control provides detailed control over the sound. Felix’s ability to blend two channels is most helpful. It means I can send one signal line to the sound board without any need for EQ or balance there. My gigs are mostly with an acoustic trio. I do some solo work too. Flexi helps me get and maintain the sound I want within the trio and when I’m doing a solo gig. I can set up Felix’s controls and not worry about the sound quality. No continuous tweaking the sound board at the gig. I use both vocal and instrument wireless units to feed signal to Felix. That works great and keeps the wiring on stage to a minimum. The signal is clean as can be with Felix. I’m delighted I made the investment in Felix. Well worth it. Felix has improved the quality and reliability of my sound far beyond the unit’s price tag. Highly recommend it to acoustic musicians seeking detailed control over their sound. Perfect for a solo performer. Works well within a group too.



    FELiX SKB case. Waterproof military-spec case with custom foam insert that fits FELiX perfectly. Includes an accessory pocket for cables, contraband, etc...

    $75.00 plus $12.00 S/H

    US Sales only. Please contact us for purchases outside US.

    FELiX soft case. Nice, padded cordura nylon case with shoulder strap and an outside zipped accessory pocket for cables, contraband, etc...

    $45.00 plus $8.00 S/H

    US Sales only. Please contact us for purchases outside US.