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7

representation of how your EQ settings are working.

8.9  100-240VAC POWER INPUT

Felix is powered by a universal AC power supply. This means 

that no matter where your musical wanderings take you, you 

can plug Felix in to the wall and it will work. And it also means 

one less wall wart you’ll own in your life. All units are shipped 

with a standard AC cable suitable for the country where it is 

going. This is a standard, off-the-shelf IEC power cable, so in the 

event you misplace the one that came with your Felix, you can 

just borrow one from the soundperson or the bass player and 

go. 

9  Operation

9.1  WHERE TO PUT FELIX?

Great question. We recommend you put him wherever you 

want. He will look very pretty when you first pull him out of his 

box, but trust us, he is built to stand up to just about any kind 

of stage shenanigans you might encounter. All the pots have 

metal shafts and are well mounted to the top panel. All the 1/4” 

jacks have heavy duty metal bushings. The top panel is 1/4” 

extruded aluminum, and the bottom chassis is appropriately 

heavy duty. As you may have surmised by now, the main 

inspiration for this product was to have studio-grade audio 

hardware, properly ruggedized to live on the stage floor or 

mounted to a pedal board.
Also, we have included mounting holes on the underside for 

a standard mic stand mounting flange (which can be found 

at most larger music gear retailers). This allows Felix to be 

mounted directly to the top of a mic stand. If you do chose 

to keep Felix up off the floor, you can still access the BOOST/

TOGGLE and MUTE/ TUNE footswitch features by connecting an 

external footswitch to the ‘fs’ jack on the rearpanel.
Now that you have picked a place for Felix to reside, it’s time to 

make some sound.

9.2  USING THE XLR MIC INPUT CH1

Before connecting a microphone to Felix, make sure the Ch1 

gain knob is turned all the way down and the side panel 48V 

phantom power switch is set to off (pushed out). Then connect 

your microphone and if 48V is needed, simply 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.
Gain range for this input is adjustable b18dB and 

+60dB via the top panel Ch1 GAIN control knob. 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. This means 

that occasional red flashes are ok, but if the LED is mostly red, 

well then, you better turn it down.

9.3  INSTRUMENT / LINE INPUTS

These are the inputs you will use for connecting your 

instrument(s) to Felix. There is a wide array of different pickup 

types in the world: active electronics in an electric bass, passive 

under bridge plate transducers, contact mics, soundhole 

magnetics, etc.. We wanted to make sure Felix brought out 

the best in all of them and accordingly, there are some useful 

features that can help make that happen.
Because we designed Felix to play well with a wide array of 

mics and pickups on a wide array of instruments, the gain 

control sweep required is more than this single potentiometer 

can provide. Accordingly, there is an internal jumper which 

activates  an 18dB pad on the Ch1 line input. The Ch1 

microphone XLR mic input is not affected by this pad. This 

pad jumper is set to ‘ON’ from the factory, which mostly 

matches the gains of Ch1 and Ch2. If you are using a source 

that requires more gain (e.g. a low output pickup on a delicate 

acoustic instrument), you may need to open up Felix and set 

this jumper in the ‘ON’ position. Or likewise, if the source you 

are using is overloading this channel, you will probably need 

to set the pad back to its ‘OFF’ position. This is easy to do! We 

specifically designed Felix’s chassis to make it easy to access 

internal jumpers. Please refer to the jumper diagram and access 

procedure on p. 12&13. See, aren’t you glad you’re reading this 

manual? Us too.

WARNING: make sure to disconnect the power mains before 

removing the Felix top panel to make jumper adjustments.

Using a Dual Source Instrument with a Single TRS Cable

The Ch2 input can accommodate two different signals from 

a dual source pickup system on a single TRS 1/4” cable. The 

connector is a standard TRS 1/4” jack and is wired:
• 

Tip signal to Ch2 input, 

• 

Ring signal normaled to Ch1 input, 

• 

Sleeve to ground. 

This feature makes using a dual source pickup system very 

convenient. Assuming your instrument is properly wired with 

a TRS output jack, you can simply use a standard TRS cable to 

connect both sources to Felix, then EQ and blend each signal 

accordingly. The sonic results of this kind of acoustic pickup 

system can be very excellent.

Input Impedance Selection

Both instrument inputs have 3 different impedance settings:
 

Ch1: med - 1MΩ / hi -10MΩ / low – 10kΩ  

 

Ch2: med - 1MΩ / hi -20MΩ / low – 332kΩ

In general, most passive pickups will want to connect to a 

higher impedance setting, while active pickups probably a 

lower. Passive pickups generally will have more sensitivity to 

input impedance, but there are no hard and fast rules. Check 

Содержание Felix

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

Страница 2: ...ion 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 I Equipment grounded 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 Category II for transient overvoltages Maximum R...

Страница 3: ...ings 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 and headphone output Boost f...

Страница 4: ...ED indicator Ch1 2 3 High Pass Filter notch Notch 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 global 10 Mix control 11 A B footswitch 12 BOOST footswitch 13 Amp Tuner Headphone output level 14 MUTE TUNE...

Страница 5: ...e mic level select 9 External Footswitch input 10 Amp Output 11 Tuner Output 12 Effects Insert 13 Amp Source Select switch 14 Ch1 input mic line switch 15 Ch1 mic input 16 Ch2 line input 17 Ch1 line input 18 Ch1 2 input impedance select 7 SidePanelControlsandFeatures 48V ch2 ch1 A B LO LO I O HI HI MODE 12V MID2 MID1 CH2 CH1 6 1 5 4 3 2 6 1 5 4 3 2 1 2 3 4 5 6 1 Dip Switch location diagram 2 Ch1 4...

Страница 6: ...SEE WIRING DIAGRAM page 11 8 4 AMP OUT 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 the added benefit of a level control which is situated on the right side bottom row of controls on the top panel This output is muted when the MUTE tune footswitch is activated Amp out can be sou...

Страница 7: ...ing This means that occasional red flashes are ok but if the LED is mostly red well then you better turn it down 9 3 INSTRUMENT LINE INPUTS These are the inputs you will use for connecting your instrument s to Felix There is a wide array of different pickup types in the world active electronics in an electric bass passive under bridge plate transducers contact mics soundhole magnetics etc We wante...

Страница 8: ... the very least it s good for you to know how to operate these controls and hear them in use with your instruments 9 4 FILTERING AND EQ One of the truly defining features of our pal Felix is the very powerful fully independent EQ filter controls on each channel Each channel has identical controls so the descriptions in this section apply to both Ch1 and Ch2 If you haven t used EQ s or filters much...

Страница 9: ...bove the 2kHz is boosted or cut Simply put this is a treble control If you think your banjo may be too bright turn this knob counterclockwise If you think your guitar needs a little more bite turn this knob clockwise If you re not sure then get down there and start turning it one way or the other until it sounds better GAIN Hz 20 2 0k 20k 12k HIGH SHELF EQ 0dB 12dB 12dB 9 5 OUTPUT CONTROLS Boost W...

Страница 10: ...he soundperson mute your channel When MUTE tune is active the adjacent LED illuminates RED 9 7 SIDE PANEL CONTROLS Felix 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...

Страница 11: ...GND 1 4 TRS PLUG TIP SLEEVE To Felix Insert Jack SEND RETURN 1 4 TS PLUG 1 4 TS PLUG To Outboard Input Jack To Outboard Output Jack GND RING 10 2 EXTERNAL FOOTSWITCH WIRING GND 1 4 TRS PLUG TIP SLEEVE To Felix footswitch jack BOOST MUTE RING ...

Страница 12: ...n the following page to move any jumpers you wish 6 To move a jumper use tweezers or your fingernails to gently pull the jumper off of it s header pins To reposition the jumper double check the diagram then gently press the jumper back down in the correct location 7 J2 J17 J18 all reside on 2 pin headers If you wish to set these to a non jumpered setting simply push one side of the jumper down ont...

Страница 13: ...ion is 125Hz HI position is 250Hz J23 Sets the secondary external footswitch function Options are boost toggle or disable Primary footswitch function is fixed as MUTE TUNE 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 J2 Sets the Ch1 instrument input gain range Options are LO 3 44dB and ...

Страница 14: ...2 1 4 UNBALANCED IN CH 2 GAIN CH 2 LOW FREQ BOOST CUT CH 2 HIGH FREQ BOOST CUT CH 2 MID FREQ BOOST CUT CH 2 MID FREQ FREQ SEL CH 2 MID FREQ Q CH 2 INPUT CH 2 POLARITY BOOST GAIN CH 1 POLARITY CH1 SIG CLIP INDICATOR CH 1 LOW FREQ BOOST CUT FREQ SEL SEL CH 1 CH 2 ISO1 SOURCE SEL ISO2 SOURCE SEL MONO HEADPHONE OUT IMPEDANCE CH 2 HPF NOTCH CH 2 HPF NOTCH CH2 SIG CLIP INDICATOR FREQ SEL SEL GROUND LIFT...

Страница 15: ... com or feel free to call us We are always glad to help out in any way we can 1 303 823 8100 M F 9 5 MST acoustic or electric instruments 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 insert stage amp fed by amp out monitor mixer recorder workstation yadda fed by DI 2 output Sourced by mix or Ch2 FOH ...

Страница 16: ...eadphone and Insert Outputs 150Ω SIGNAL PEAK LED METER Green threshold 10dBu Red threshold 10dBu MAXIMUM INPUT LEVEL CH1 MIC 0dBu CH1 Inst Low Gain 21dBu High Gain 0dBu CH2 Inst 20 5dBu MAXIMUM OUTPUT LEVEL 100k Ohm load 0 1 THD DI Outputs Line 20dBu Mic 6dBu Amp Tuner Headphone and Insert Outputs 22dBu High Pass Filter Notch Filter High Pass Filter 20Hz 1kHz 12dB octave Notch Filter 20Hz 1kHz 35d...

Страница 17: ... 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 p...

Страница 18: ...18 14 ManualRevisions Revision Page Change Date Initials A all Initial release 05 08 2015 edg ...

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