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tuner outputs on the rearpanel and also of the headphone 

jack on the right sidepanel. If you are using a stage amp, use 

this control as your master level. Correct input gain settings for 

your sources, with the signal LED showing mostly green, should 

not be adjusted to alter your stage amp level. Rather, use this 

control to make master level changes.
If you are using the side panel headphone jack with the MUTE 

switch activated, remember that headphone level adjustments 

will also affect stage amp level, which could lead to a big nasty 

sound on stage when un-muting Felix 2 outputs. Simply make 

a note of your stage amp level before making adjustments to 

this control while headphone monitoring.

Mix

This control adjusts the mix (or blend) between CH1 and 

CH2. Before using this control, it’s important to verify if the 

preamp is set to MIX or A/B mode. This setting is toggled via 

the side panel DIP switch #6. With the switch in MIX mode (the 

downward position), this control will operate normally as a 

simple mixer. With this knob turned fully counter-clockwise, 

the outputs (set to MIX) will be sending 100% CH1. With the 

knob turned fully clockwise, the outputs will be sending 100% 

CH2. With the knob centered at 12 o’clock, the outputs with be 

sending a 50/50 blend of CH1 and CH2. 

If the preamp is set to A/B mode via the left side panel DIP 

switch #6, then this control will have no effect.  

 

Remember, if you intend to blend CH1 and CH2, you must 

set the DI output(s) or Amp output to ‘mix’ mode via the 

pushbutton toggle switches on the rearpanel and make 

sure your Insert Send jack internal jumper setting (J19) is 

configured to send MIX.  

9.6  FOOTSWITCH CONTROLS

Blend – A/B

This is the far left foot switch on Mr. Felix 2. If the unit is set to 

blend mode via DIP switch # 6, then this switch will do nothing, 

and both adjacent LEDs will be permanently illuminated. If the 

unit is set to A/B mode, then this switch will be used to toggle 

between CH1 and CH2, with the accompanying amber LEDs 

lighting and extinguishing accordingly. This toggle mode is 

exclusive, so if you have CH1 selected, CH2 will be muted and 

vice versa.

Boost

You guessed it. This switch activates the Boost circuit, at the 

level you set with the upper row ‘boost’ knob. For those about 

to rock, hit this switch first. The LED will light up GREEN for go. 

Mute / Tune

This switch mutes all Felix 2 outputs (ISO 1, ISO 2 and AMP) 

except the tuner and headphone outputs. This enables you 

to quickly and easily cut your signal to tune or unplug your 

instrument without having to have the sound person mute 

your channel. When MUTE / tune is active, the adjacent LED 

illuminates RED.

9.7  SIDE PANEL CONTROLS

Felix 2 has a lot going on, more than we could fit on the rear 

and top panels alone. So there are a number of features to be 

familiar with on the side panel.

CH1&2 Phase Reverse

These two pushbutton toggle switches reverse the polarity of 

each channel’s audio signal. To reverse the polarity of either 

channel, simply push the toggle in, to return to no polarity 

reverse, push the toggle again to return it to it’s outer position.

48V Phantom Power

This activates 48V phantom power for the CH1 microphone 

preamplifier. Phantom power is sent out on pins 2 and 3 of the 

XLR connector.

DIP Switches

This is a bank of 6 DIP switches, used to activate various modes 

or settings. Switches 1 & 2 select between CH1 & CH2’s HPF or 

notch setting. Switches 3 & 4 select between CH1 & CH2’s mid 

EQ’s frequency range, LO or HI. Switch 5 activates 12V power on 

the instrument inputs. Switch 6 selects between blend or A/B 

mode.
DIP switches are hard to adjust, which is good because they 

probably won’t get inadvertently changed, but bad when you 

actually want to change them. Use the edge of a fingernail, a 

guitar pic or a toothpick. Whatever you chose, take care not to 

dig into the plastic too hard. You’ll get the hang of it.

Headphone Jack

This is a standard 1/8” mini headphone jack, suitable for most 

types of headphones. It is stereo, and follows whatever signal is 

present at the AMP output. The level control for this is the Amp 

/ phones knob on the right side of the top panel. This output 

is always active, even if the top panel MUTE / tune switch is 

activated. This way you can play or practice privately with 

your headphones on while your stage outputs remain muted. 

Bandmates will be relieved, sound-people will be happy. 

Kumbaya.

Variable Phase Control

NOTE: This control is not activated from the factory - an 

internal jumper must be set to turn it on.

This is a new control for FELiX 2 which allows for variable phase 

adjustment of the CH2 signal to correct phase shift that might 

occur when blending a microphone in CH1 and a pickup in 

CH2. Depending on the distance to the sound source, the mic 

signal might be naturally delayed compared to a pickup signal. 

The further away the microphone, the greater its time delay can 

be.

Summary of Contents for FELiX2

Page 1: ...1 2 Channel Instrument Preamplifier EQ DI Owner s Manual Rev A Grace Design 4689 Ute Highway Lyons CO 80503 303 823 8100 info gracedesign com www gracedesign com ...

Page 2: ...n Indoor use only Ordinary Protection This equipment should not be exposed to dripping or splashing Avoid placing objects filled with liquids such as vases or glasses on this equipment Class II Equipment double insulated type Electrical rating 100 240V 50 60Hz 10W Mains supply voltage fluctuations are not to exceed 10 of the nominal supply voltage Pollution Degree 2 Installation Over voltage Categ...

Page 3: ...nels hi and low shelving and full parametric midrange LOW and HIGH shelving controls each have 2 range corner frequency settings via internal jumpers Mid frequency control has two ranges 70 880Hz 670 8kHz 20Hz 1kHz sweepable HPF on both channels can also be set as high Q notch filter A B footswitch for multiple instrument configurations or soloing different pickups Mute tune footswitch mutes all o...

Page 4: ...filter CH1 2 4 Low frequency shelving cut and boost CH1 2 5 Parametric Midrange cut and boost CH1 2 6 Parametric Midrange frequency select CH1 2 7 Parametric Midrange Q factor CH1 2 8 High frequency shelving cut and boost CH1 2 9 Boost level 10 Mix control 11 A B footswitch 12 BOOST footswitch 13 Amp Tuner Headphone output level 14 MUTE TUNE footswitch ...

Page 5: ...switch protector 3 CH1 48V phantom power 4 CH1 phase reverse 5 CH2 phase reverse 6 DIP switch controls 7 1 8 mini headphone jack 8 CH2 variable phase control 8 Connections 8 1 1 4 INSTRUMENTINPUTS CH1 CH2 INPUT 1 This input is for connecting any instrument pickup electret mic or line source to CH1 The connector is a standard TRS 1 4 jack wired tip signal sleeve ground The ring is used only for 12V...

Page 6: ...ing with external effects that have much lower headroom than the Felix 2 The factory setting is 6dB Configuration of internal jumpers is described in detail on page 12 8 5 AMPOUT This output is for sending an unbalanced non transformer isolated output to a stage amp or anywhere else you may need an additional unbalanced signal This output has a level control which is situated on the right side bot...

Page 7: ... activate it with the side panel 48V switch Always remember to turn 48V power ON after connecting your microphone and OFF before disconnecting your microphone Use the top panel CH1 signal clip indicator to properly set the mic level The LED will light green with signal present then will begin to flash red when the channel is 12dB before clipping Occasional red flashes are ok but if the LED is most...

Page 8: ... sounds best If you are using Felix 2 to toggle between two different instruments you probably won t need to mess with their polarity Phase relationships can be very complicated and discrepancies can result in highly accentuated or de accentuated bass response of a blended signal Or it can sound hollowed out and thin or just downright weird Again the rule of thumb here is whatever sounds right is ...

Page 9: ...able ranges the over all range of the mid controls is very wide which enables targeting of specific sonic areas of a multitude of instrument or pickup types GAIN Hz 20 1k 20k MID EQ 0dB 12dB 12dB Q Q factor determines the sharpness of the bandwidth of the frequency being adjusted A higher Q factor setting turning the Q knob further clockwise creates a sharper bandwidth and thus a more targeted sur...

Page 10: ...witch mutes all Felix 2 outputs ISO 1 ISO 2 and AMP except the tuner and headphone outputs This enables you to quickly and easily cut your signal to tune or unplug your instrument without having to have the sound person mute your channel When MUTE tune is active the adjacent LED illuminates RED 9 7 SIDEPANELCONTROLS Felix 2 has a lot going on more than we could fit on the rear and top panels alone...

Page 11: ...there is phase shift between the two sources you should hear them come into phase They will sound more focused and sturdy Adjust this control while listening under headphones or IEMs which allows you to isolate the effect of the control from the direct sound of the instrument This contol may make a huge improvement or it may be barely noticeable Result can vary based on a wide array of variables i...

Page 12: ...dB and HI 17 62dB This is set to LOW at factory J6 and J7 Configures 12V power which can be applied to either channel s tip ring or set to off Set these according to how your microphone instrument is wired This jumper is set to OFF at the factory with the jumper simply pressed down on one pin J15 configures DI output mode when the preamp is in A B mode and DI source switch is set to MIX DUAL ISO m...

Page 13: ... 6dB 16dB INSERT PADS CH1 MIX J19 INSERT SEND CH1 J18 INSERT RET STEREO MONO J2 LOW GAIN HIGH GAIN CH 1 INST GAIN J15 J15 EXCLUSIVE J15 DUAL ISO OUT MODE J25 J3 J26 J13 J11 J31 CH1 LF 125Hz CH1 LF 250Hz PHASE CONTROL ON PHASE CONTROL OFF CH2 LF 125Hz CH2 LF 250Hz CH1 HF 1kHz CH1 HF 2kHz CH2 HF 1kHz CH2 HF 2kHz CH1 BOOST ENABLE CH1 BOOST OFF LOW GAIN HIGH GAIN CH 1 PREAMP GAIN J32 ...

Page 14: ...to FX input standard 1 4 cable Two TS plugs from stereo FX outputs to one TRS plug to return standard Y insert cable Jumper Settings J19 MIX J18 ST Insert operation with FELiX in MIX mode Insert operation with FELiX in A B mode comp out input reverb out input CH1 FX out TS TS tip TRS TS TS tip ring send return comp out input reverb out input global FX TS TS tip TS TS tip return send comp out input...

Page 15: ...struments with pickups or internal mics plug into Ch1 or Ch2 inputs instrument mic vocal mic plugged into mic input 1 external effects routed through the inserts can be configured as follows dual mono different FX for eachg channel mono FX send stereo FX return stereo FX send stereo FX return stage amp fed by amp out monitor mixer recorder workstation yadda fed by DI 2 output Sourced by mix or Ch2...

Page 16: ... CH 2 HPF NOTCH CH2 SIG CLIP INDICATOR FREQ SEL SEL GROUND LIFT INSERT RETURNS TIP RING TIP CH 1 INPUT IMPEDANCE CH 1 12V MIC POWER TIP RING OFF VIA JUMPER CH 2 12V MIC POWER TIP RING OFF VIA JUMPER 12V ON OFF CH 1 LO HI RANGE CH 2 LO HI RANGE TOGGLE MODE INSTERT SENDS ISO2 MIC LINE LEVEL ISO1 MIC LINE LEVEL SIDE PANEL DIP SWITCH TIP RETURN CH 1 RING RETURN CH 2 REAR PANEL TOGGLE SWITCH SIDE PANEL...

Page 17: ...s 150Ω Amp Tuner HeadphoneandInsertOutputs 150Ω SIGNAL PEAKLEDMETER Greenthreshold 10dBu Redthreshold 10dBu MAXIMUMINPUTLEVEL CH1MIC lowgainmode 4dBu CH1MIC highgainmode 1dBu CH1Inst LowGain 18dBu HighGain 4dBu CH2Inst 20 5dBu MAXIMUMOUTPUTLEVEL 100kOhmload 0 1 THD DIOutputs Line 20dBu Mic 6dBu Amp Tuner HeadphoneandInsertOutputs 22dBu HighPassFilter NotchFilter HighPassFilter 20Hz 1kHz 12dB octav...

Page 18: ...e workmanship without charge provided the customer has appropriate proof of purchase and that the product has its original factory serial number In order for Grace Design to provide efficient and timely warranty service it is important that you mail the completed warranty registration card enclosed with all of our products within 10 days of the original date of purchase You may also register your ...

Page 19: ...19 17 ManualRevisions Revision Page Change Date Initials A all Initial release 03 05 2021 edg ...

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