Owner`s Manual Rev
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
1
1 Welcome
If you’re reading this, you are probably a working musician or
audio professional of some kind. You’ve spent years honing
your craft with long, lonely hours spent strumming, picking,
tweaking, bowing, thumping and plucking. Maybe you tour the
world, or just the local coffeshops. You’ve gotten up on stage
tired, given more than you thought you had and driven home
barely awake but your soul still singing. You have friends and
bandmates out there that you rely on like family. Some of your
friends, maybe the very best ones, are made of wood, steel,
glue, bone and strings. And now you can welcome Felix to the
latter category.
Regardless of where you end up playing, from here on when
you look down at that stage floor, he’ll be down there shining
back up at you, making you sound better and your job easier.
While Felix is not the most complicated piece of gear you’ve
ever operated, he does come with a great deal of flexibility and
setup options, which means we highly recommend you have
a good look at this owner’s manual to familiarize yourself with
his finer points. Once you overcome the learning curve (easy,
we promise), you’ll find Felix to be intuitive, powerful and really
quite user friendly.
Most of all, we made Felix so you can make great music. So read
this manual and then get back to work!
TABLE OF CONTENTS
1 Welcome
2 Safety Information
3 Safety Marking Symbols
4 Features
5 Top Panel Controls and Features 6 Back Panel Controls and Features
7 Side Panel Controls and Features
8 Connecting Felix to Stuff
2
2
3
3
4
5
5
6
8.1 1/4” Instrument inputs, Ch1 and Ch2 6
8.2 Ch1 XLR mic input 6
8.3 Insert 6
8.4 Amp Out 6
8.5 Tuner Output 6
8.6 FS - footswitch Input 6
8.7 DI Outputs, Ch1 & Ch2 6
8.8 Headphone Output 6
8.9 100-240VAC Power Input 7
9 Operation
7
9.1 9.2 9.3 9.4 9.5 9.6 9.7 Where to put Felix? 7
Using the XLR mic input Ch1 7
Instrument / line inputs 7
Filtering and EQ 8
Output controls 9
Footswitch Controls 10
Side Panel Controls 10
10 Diagrams
10.1 10.2 10.3 10.4 10.5 10.6 11
Insert cable Wiring 11
External Footswitch Wiring 11
Adjusting Internal Jumpers 12
Internal Jumper Locations 13
Block Diagram 14
Connection Diagram 15
11 Specifications
12 Cleaning and Maintenance
13 Warranty
14 Manual Revisions
16
17
17
18
2 Safety Information
2
•
Indoor use only
•
Maximum Relative Humidity: <80%
•
Ordinary Protection: This equipment should not be
exposed to dripping or splashing.
•
Operation temperature range: 10 °C to 40 °C
•
Avoid placing objects filled with liquids, such as vases or
glasses, on this equipment.
•
Storage and transportation temperature range –40 °C to 70
°C
•
Class I Equipment (grounded type)
•
Maximum altitude: 3000m (9843 ft)
•
Electrical rating: 100-240V~ 50-60Hz 10W
•
Equipment suitable for continuous operation
•
Mains supply voltage fluctuations are not to exceed ±10%
of the nominal supply voltage.
•
Weight: 3.2lbs
•
Pollution Degree 2
•
Installation (Over voltage) Category II for transient
overvoltages.
3 Safety Marking Symbols
Caution: Read Accompanying Documents
This symbol, located on the equipment and in
this manual, refers to important instructions.
Read this manual thoroughly before operating
this equipment.
Service Information
The Grace Design Felix contains no user serviceable
components. Contact Grace Design for repair and upgrade
information. In the event that your Grace Design m920
needs to be returned to the factory, contact us for a return
authorization number.
Warning: Electrical Shock Hazard
This symbol, located on the equipment and in
this manual, indicates the potential for electrical
shock hazard.
4 Features
•
Open, musical and detailed instrument and mic
preamplification for discerning artists and engineers like
yourself
•
1/8” headphone jack, remains active when 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 Ch1 and Ch2 1/4” inputs
•
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 for mounting Felix on
a mic stand
•
Global TRS effects insert jack
•
Universal 100-240 AC power supply with standard IEC
cable – no wall wart - take Felix anywhere in the world!
•
2 channel audio path with mix output option
•
m101 style transimpedance microphone preamplifier, no
electrolytic capacitors in the signal path
•
Ultra precision 0.5% thin film resistors used in the signal
path
•
Careful power supply design and grounding for an ultraquiet signal path and professional level headroom and line
driving ability
•
Dual, 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
Full 5 year transferable warranty / built for a long, happy
life on the road
•
Designed and built by us in Lyons, CO, USA
•
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 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 MIX or Ch2)
•
Dedicated tuner out, remains active when unit is muted
3
5 Top Panel Controls and Features
1
2
3
4
6
5
7
6.4k
700
1k
110
670
70
8k
HI 880
LO
2.3k
250
3.6k
400
6.4k
700
1k
110
11
1. Gain controls (Ch1&2)
2. Signal / clip LED 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 footswitch
4
9
3.6k
400
2.3k
250
670
70
8
8k
HI 880
LO
12
13 14
10
6 Back Panel Controls and Features
PUSH
1
2
3
4
5
6
7
8 9 10 11 12 13 14 15
16
1. Universal 100-240VAC power supply input module
10. Amp Output
2. Ground lift switch
11. Tuner Output
3. Ch1 DI output
12. Effects Insert
4. Ch1 DI output source select
13. Amp Source Select switch
5. Ch1 DI output line / mic level select
14. Ch1 input mic / line switch
6. Ch2 DI output
15. Ch1 mic input
7. Ch2 DI output source select
16. Ch2 line input
8. Ch2 DI output line / mic level select
17. Ch1 line input
9. External Footswitch input
18. Ch1 & 2 input impedance select
17
18
7 Side Panel Controls and Features
CH 1 CH 2 MID 1 MID 2 12V
MODE
HI
HI
I
A-B
LO
3
LO
4
O
5
6
1
2
48V ch1 ch2
123456
1
2 3 4
5
6
1. Dip Switch location diagram
4. Ch2 phase reverse
2. Ch1 48V phantom power
5. DIP switch controls
3. Ch1 phase reverse
6. 1/8 mini headphone jack
5
8 Connecting Felix to Stuff
8.1 1/4” INSTRUMENT INPUTS, CH1 & CH2
INPUT 1 - This input is for connecting any instrument pickup,
electret mic or line source to Ch1. The connector is a standard
unbalanced 1/4” jack wired tip signal, sleeve ground. If you are
using this input, remember to select the ‘line’ setting of the
adjacent ‘mic/line’ switch. We recommend muting Felix before
changing the setting of the mic/line switch to avoid pops on
the output.
Amp out can be sourced from either the blended signal or Ch2
alone, with the selection being made with the ‘amp source’
selector switch on the rearpanel.
INPUT 2 - This input is for connecting any instrument pickup,
electret mic, or line source to Ch2. This input can also
accommodate two different signals from a dual source pickup
system on one TRS 1/4” cable. The connector is a standard TRS
1/4” jack wired tip signal to Ch2, ring signal normaled to Ch1,
and sleeve ground. If you are using this input, remember to
select the ‘line’ setting of the adjacent ‘mic/line’ switch.
8.5 TUNER OUTPUT
Both Ch1 and Ch2 line inputs have 3 input impedance settings,
selectable from the toggle switch labeled ‘Z’ . The settings are:
8.6 FS - FOOTSWITCH INPUT
Ch1: med - 1MΩ / hi -10MΩ / low – 10kΩ
Ch2: med - 1MΩ / hi -20MΩ / low – 332kΩ
Some pickups or sources are more sensitive to preamp input
impedances than others. For example, if you use a ‘Sunrise’
magnetic pickup, they prefer to connect with an input
impedance of 1MΩ. If you have an onboard preamp or a lower
impedance pickup, the input impedance setting will probably
make less of a difference. In any case, we encourage you to try
different settings with your pickup or source. The difference
may be noticeable or not, and should be set accordingly to
what sounds best to you. Always what sounds best to you!
8.2 CH1 XLR MIC INPUT
This input can accommodate any type of microphone, from
a SM57 to a large diaphragm condenser, even a ribbon mic.
The connector is wired pin 2 positive, pin 3 negative and pin 1
ground. 48V phantom power, if activated, is supplied on pins
2 and 3. If you are using this input, remember to select the
‘mic’ setting of the adjacent ‘mic/line’ switch. The side panel
phantom power switch should always be set to OFF whenever
connecting or disconnecting this input. We recommend
muting Felix before changing the setting of the mic/line and
48V switches to avoid pops on the output.
8.3 INSERT
The insert connection is a buffered, unbalanced insert point of
the blended signal (post boost) for connecting outboard effects
to Felix. This allows mono outboard signal processing to be
placed in series with the blend signal, while still utilizing all of
Felix’s output capabilities. It is a 1/4” TRS connection, wired tip
to send, ring to return and sleeve to ground.
SEE WIRING DIAGRAM page 11
8.4 AMP OUT
This output is for sending an unbalanced, non-transformer
6
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.
This is another unbalanced output which is always active –
provided as a dedicated stage tuner out. When the MUTE is
activated, your stage tuner will continue to receive signal,
allowing you to tune silently. The Tuner output level follows
the Amp Out level control.
This input is for connecting an external footswitch to operate
the top panel footswitch functions. This is provided for folks
who will keep their Felix in a rack, on top of an amp, mounted
to a mic stand, or anywhere up off the floor. This allows you
to connect a standard 2 way foot switch and access the MUTE
and BOOST / TOGGLE functions. These controls have a logic
‘or’ function, so if either the footswitch or the front panel
toggle is engaged, the associated function will be activated.
Felix utilizes and requires ‘normally open momentary’ type
footswitches.
SEE WIRING DIAGRAM page 11
8.7 DI OUTPUTS, CH1 & CH2
These two outputs are balanced and transformer isolated, for
sending Felix signals to a front of house, monitor console, or
any mixer or interface where balanced, isolated signal needs to
be sent. XLR pinout is: pin 2 positive, pin 3 negative and pin 1
ground.
Each output can be sourced from either its individual channel
only, or the blend of the two channels, adjusted by the ‘MIX’
control on the far right of the top panel controls. Source select
is via the ‘DI source select’ switch above each XLR output. Also,
each output has an adjacent level setting switch – line and
mic, depending on what input this source will be feeding. In
the ‘mic’ setting, the output is padded down -26dB to interface
properly with mic inputs at the console, the ‘line’ setting is not
padded for better level matching with line level inputs at the
console or interface.
8.8 HEADPHONE OUTPUT
This is a 1/8” mini style headphone jack for monitoring Felix
via your headphones, EIM, earbuds etc.. This output level is the
same as the amp out, so the top panel amp out level control is
used to adjust headphone volume as well. This output remains
active when Felix is muted, so you can plug in your IEM’s and
practice privately during long, boring soundchecks. This can
also be very useful for hearing a very detailed and isolated
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.
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.
Gain range for this input is adjustable between +18dB 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.
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.
9.3 INSTRUMENT / LINE INPUTS
Both instrument inputs have 3 different impedance settings:
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
Input Impedance Selection
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
7
with the manufacturer of your particular pickup system to see
if they recommend a specific input impedance for their device.
Ultimately, as is with so many things like this, the final judge
of this setting should be your ears. Impedance mismatches at
this stage may not even be audible, or very subtle, or totally
apparent. But trust yourself here – nothing will break if you
have the wrong setting – just audition the 3 positions of the
impedance switch and if one sounds better over the other 2,
than that’s the correct setting. Yeehaa!
12V Power
Both Ch1 and Ch2 instrument inputs can be used to amplify
an electret capacitor microphone. These are common for
applications where small microphones are mounted inside
acoustic instruments, or lavalier style microphones used
somewhere on the outside of the instrument. Normally these
microphones will contain very small integrated preamps which
require a small voltage to power. So the Felix can send 12V
phantom power out on both of these inputs. This is activated
via DIP switch # 5 on the side panel.
overview here. But the full science of this process is more than
we can cover here, so we strongly recommend some adjunct
reading:
http://en.wikipedia.org/wiki/Equalization
As with all audio processing techniques, the more you know,
the better you will sound.
HPF / Notch
This is the next control to the right of the GAIN knob for each
channel. To select between HPF and Notch, adjust the left side
DIP switch locations # 1 & 2 respectively for channels 1 & 2.
HPF: A High Pass Filter will only allow signal information above
its set frequency to pass downstream to the output. This
filter employs 12dB per octave roll off and uses a Thomson –
Butterworth response for the best combination of passband
flatness and time domain response. Yes, that will be on the quiz.
GAIN
HIGH PASS FILTER
0dB
12V power can be applied to the tip, ring or neither of each
channel’s input jack. Configuration is done via internal jumpers,
described in detail on pages 12 & 13.
NOTE: this power supply charges up slowly, so you may need to
wait a few seconds before signal from your electret mic is present
at the input of Felix. And, as with 48V phantom power in the XLR
mic input, it is always best to make your input connections before
applying power at the DIP switch, and power OFF the 12V at the
DIP switch before disconnecting your source.
Phase Reverse
Both Ch1 and Ch2 have phase reverse switches, located on
the left side panel, directly next to the 48V phantom power
switch. Use these to toggle the polarity of either channel.
Experiment with these methodically – one at a time, to find the
setting that sounds right. If you are blending two sources on
one instrument, you may find that flipping the polarity on one
source or the other sounds best. If you are using Felix 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 probably right.
There may be setup scenarios where the front of house or
monitor engineer requires you to try flipping the phase to
achieve better phase coherency with other signals in the mix.
At 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, we will provide a basic
8
-12dB
40
125
1k
20k
Hz
Simply put, use the high pass filter to cut unwanted bass
frequencies out of a signal. Usually a HPF is used to eliminate
rumble or non-musical low frequency information out of a
signal. But this HPF range is from 20Hz to 1.0kHz, so you can
make very dramatic filter settings. Some instruments won’t
have any information below a certain frequency. Fiddle for
example only extends its lowest fundamental down to 200Hz.
So if you are amplifying a fiddle, you could safely set the HPF at
150 – 200 Hz without hearing much effect in the tonality of the
instrument. Whereas a bass can have a low fundamental down
around 30Hz, so setting the HPF any higher than that could
affect its tonality.
If you are on a stage with an acoustic guitar, and there is lots of
low end making you sound bad, or feeding back or both, the
HPF might be your first stop to try to control those problems.
Notch: A notch filter is a very sharp and deep cut of a specific
frequency. This is used predominantly to find and remove a
specific problem frequency that may be feeding back through
stage monitors or amps, or to simply cut out a very specific,
narrow unwanted part of an instrument’s frequency range. This
notch uses the same frequency sweep of 20Hz – 1.0kHz.
NOTCH FILTER
GAIN
0dB
-12dB
40
125
1k
20k
Hz
Under normal operation, if you don’t have a use for a notch
filter, we recommend you leave the left side panel DIP switch in
the HPF setting. That way, with the HPF set in its fully counter
clockwise position, this entire filter control is effectively out of
the signal.
Low
The Low control of the Felix preamplifier is fixed at 125Hz (+3dB) corner frequency / 40Hz peak, with a gain range of -12
to +12dB. This is a fixed shelving type control, which means
everything below the 125Hz is boosted or cut. Use this control
for cutting and boosting bass frequencies. It’s all about the
bass.
GAIN
LOW SHELF EQ
+12dB
High
The High control of the Felix preamplifier is set with a 2kHz
(+/-3dB) corner frequency/ 12kHz peak, with a gain range of
-12 to +12dB. This is a fixed shelving type control, which means
everything above 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
0dB
HIGH SHELF EQ
+12dB
-12dB
40
125
12k
20k
Hz
Also, because certain acoustic instruments (banjo) may react
better to a higher corner / peak frequency, we have added a
Low control range jumper on the main PCB. Moving this
jumper shifts the Low frequency up to 250Hz (+/-3dB) corner
frequency / 80Hz peak. 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 pages 12 and 13. Bravo to you for reading this
manual. You get an A.
WARNING Make sure to disconnect the power mains before
opening removing the Felix top panel to make jumper
adjustments.
Mid
The mid range section of Felix’s equalizer is fully parametric,
which enables you control the mid range gain, frequency and Q
independently. The range of these controls are:
Gain = +/- 12dB,
Freq range LO setting = 70Hz – 880Hz
Freq range HI setting = 670Hz – 8.0kHz
Q = .5 – 5
The frequency range can be switched between the LO and
HI settings via the left side panel DIP switch locations # 3 & 4.
With these two available 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 MID EQ
+12dB
Q
0dB
-12dB
20
1k
20k
Hz
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, surgical EQ adjustment. Alternately,
a lower Q factor - turning the Q knob further counter clockwise
- creates a broader tonal adjustment.
0dB
-12dB
20
2.0k
12k
20k
Hz
9.5 OUTPUT CONTROLS
Boost
Want Felix to go to eleven? How about twenty? This knob
sets the amount your signal is boosted when you activate
the ‘BOOST’ footswitch. Fully counter-clockwise is zero boost
added, fully clockwise adds +10dB of boost. The boost is global,
so it is added to every signal output leaving Felix – blended
or individual channels, amp out or either ISO out, even the
headphone out.
As you can probably imagine, if you are using a microphone
or a particularly feedback prone pickup system, adding boost
might easily send you in to feedback territory. So start small.
If you need to boost your output, start with a gentle boost
amount and work your way upwards. If you start to hear stage
feedback or are overloading the input at the console, then
you’ll need to back it off. Felix is not responsible for disgruntled
soundpeople you may encounter during the operation of the
boost circuit. He wants to keep those people happy, and you
should too.
Amp / Phones Output Level
This knob sets the output level of the unbalanced Amp and
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 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, its important to verify if Felix is
Blend or A/B mode. This setting is toggled via the side panel
9
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.
When MUTE / tune is active, the adjacent LED illuminates RED.
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.
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.
If Felix is set to A/B mode via the left side panel DIP switch #6,
then this control will have no effect.
9.6 FOOTSWITCH CONTROLS
Blend – A/B
This is the far left foot switch on Mr. Felix. 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. This circuit is
global, so the boosted signal will be coming out of every
output. For those about to rock, kindly activate this switch first.
The LED will light up GREEN for go.
Mute / Tune
This switch mutes all Felix 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 soundperson mute your
channel.
10
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
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 left / right mono, 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, soundpeople will be
happy. Kumbaya, etc...
10 Diagrams
10.1 INSERT CABLE WIRING
SEND
GND
1/4" TS PLUG
TIP
To Outboard Input Jack
RING
RETURN
SLEEVE
GND
1/4" TS PLUG
1/4" TRS PLUG
To Felix Insert Jack
To Outboard Output Jack
10.2 EXTERNAL FOOTSWITCH WIRING
TIP
MUTE
BOOST
RING
SLEEVE
GND
1/4" TRS PLUG
To Felix footswitch jack
11
10.3 ADJUSTING INTERNAL JUMPERS
Several Felix settings can be adjusted via internal
jumpers. While it’s not trivial to do, if you are handy with
a screwdriver and tweezers, you’ll be fine. This is not
something you should attempt to do on a dark stage or in
the back of the tour van. Directions for disassembling the
chassis and accessing the jumpers is as follows:
1.
IMPORTANT: Before you do anything, disconnect
Felix from the AC power, and disconnect
instrument and mic cables and place Felix on a flat
stable surface with good lighting.
2. DOUBLE CHECK: Did you completely disconnect the power
supply? Ok then.
3. With a #2 phillips screwdriver, remove the 4 chassis screws,
located on the outer edges of the front bottom and rear
bottom of the aluminum top chassis.
4. Orient the unit so the rearpanel is facing forward. Carefully
pull up on the top chassis and flip it up and over the
bottom chassis. This will reveal the top and bottom circuit
boards. Do not pull them apart any further than the ribbon
cables that connect them will allow. The top should rest
easily on the work surface flipped over and behind the
bottom chassis. See figure 2.
5. Now refer to the jumper location diagram on 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 onto one pin, so that the two pins are
not connected.
Fig. 2 opening the chassis
8. When you are finished adjusting the jumpers, make sure
there are no loose jumpers or any other junk lying around
inside your Felix.
9. Then carefully reassemble the top and bottom chassis,
making sure to let the ribbon cable fold easily back in
place. If there is any tension or something isn’t fitting
properly, carefully pull the top and bottom back apart and
inspect for interference.
10. Once you have put the unit back together, replace the 4
screws, making sure they go in straight and true. You may
need to nudge the top panel back and forth a bit to ensure
the holes in the top panel chassis line up evenly with the
inner threaded holes.
11. Do not tighten the screws until all 4 are cleanly started in
the threads. Take your time and remember, cross-threading
is a crime.
If you get stuck or something doesn’t look right, call us right
away and we’ll get you taken care of.
Fig.1 removing the chassis screws
12
10.4 INTERNAL JUMPER LOCATIONS
J18
J18
J17
J17
J23
J23
J6
J7
J2
J2
J7
J6
J18 - Sets the Ch1 EQ LOW corner frequency. LO position is 125Hz, HI position is 250Hz.
J17 - Sets the Ch2 EQ LOW corner frequency. LO position 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 HI (21-62dB).
13
10.5 BLOCK DIAGRAM
A
B
C
D
1
CH1 BALANCED
XLR MIC INPUT
+48V ON/OFF
LINE / MIC
CH 2 INPUT
IMPEDANCE
CH1 1/4" JACK SWITCH
CH1 LO/HI GAIN
VIA JUMPER
CH 1 INPUT
IMPEDANCE
+48V PHANTOM POWER
CH 1 +12V MIC POWER
(TIP / RING / OFF VIA JUMPER)
TIP
CH1 1/4"
UNBALANCED IN
+12V ON/OFF
CH 2 +12V MIC POWER
(TIP / RING / OFF) VIA JUMPER
TIP
RING
CH2 1/4"
UNBALANCED IN
1
2
CH 1 GAIN
CH 1 POLARITY
CH1 SIG / CLIP INDICATOR
CH 2 POLARITY
CH2 SIG / CLIP INDICATOR
CH 2 GAIN
2
CH1 LO/HI RANGE
VIA JUMPER
CH 1 MID FREQ
Q
CH 1 MID FREQ
FREQ SEL
3
CH 1 LO/HI RANGE
CH 1 HPF / NOTCH
SEL
CH 1 LOW FREQ
BOOST / CUT
CH 1 MID FREQ
BOOST / CUT
CH 1 HPF / NOTCH
FREQ SEL
CH 2 LO/HI RANGE
CH2 LO/HI RANGE
VIA JUMPER
CH 2 MID FREQ
Q
CH 2 MID FREQ
FREQ SEL
CH 2 MID FREQ
BOOST / CUT
CH 2 HPF / NOTCH
SEL
CH 2 LOW FREQ
BOOST / CUT
CH 1 HIGH FREQ
BOOST / CUT
CH 2 HIGH FREQ
BOOST / CUT
FOOTSWITCH
4
BOOST ON/OFF
BOOST GAIN
INTERNAL JUMPER SETTING
4
TOGGLE MODE
BLEND
CH 1 / CH 2
5
ISO1
SOURCE SEL
ISO1 MIC / LINE LEVEL
ISO2 MIC / LINE LEVEL
6
GROUND LIFT
ISO2 BALANCED OUT
ISO1 BALANCED OUT
MUTE / TUNE
ISO1 OUTPUT TRANSFORMER
ISO2
SOURCE SEL
AMP OUTPUT LEVEL
AMP UNBALANCED OUT
TIP = SEND
RING = RETURN
TIP
RING
4689 UTW HWY
LYONS, CO 80503
*
6
*
© Grace Design/Lunatec LLC All rights reserved
GRACE DESIGN
EXTERNAL FOOTSWITCH INPUT
INSERT
MONO HEADPHONE OUT
TUNER UNBALANCED OUT
ISO2 OUTPUT TRANSFORMER
AMP
SOURCE SEL
BOOST ON/OFF
OR
CH 1 / CH 2 TOGGLE
(VIA JUMPER)
MUTE / TUNE
m302 INSTRUMENT PREAMP / BLENDER
5
Drawn by: JEK
No. *
Checked by: *
Date: *
Sheet 1 of 1
Date modified: 4/13/2015
Rev. 02
Size: C
File: m302_block_diagram_20140207.SchDoc
PROPRIETARY © Grace Design/Lunatec LLC This diagram is the property of
Grace Design and Lunatec LLC. This diagram is provided for reference purposes
only. Any duplication, disclosure to third parties or unauthorized use is forbiden.
CH 1 / CH 2 TOGGLE
REAR PANEL PUSHBUTTON SWITCH
REAR PANEL TOGGLE SWITCH
SIDE PANEL DIP SWITCH
SIDE PANEL PUSHBUTTON SWITCH
FRONT PANEL KNOB
CONTROL TYPES:
CH 2 HPF / NOTCH
FREQ SEL
3
A
B
C
D
14
10.6 CONNECTION DIAGRAM
FELiX connections
external footswitch to
control mute and boost
external
footswitch
Nothing too terribly hard and fast here - just the basics about how to plug stuff in and out of
your preamp. There are many ways to connect a huge array of instrument sources to FELiX. If
you aren’t sure about how something works, please have another look at your owner’s
manual, check out our website - www.gracedesign.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
plug FELiX into nice,
clean AC power
FOH mixer fed by DI 1 output. Sourced by mix or Ch1
stage amp fed by amp out
monitor mixer, recorder, workstation, yadda fed by DI 2 output. Sourced by mix or Ch2
amp
out
input
A
tuner
side panel headphone jack
acoustic or electric instruments with pickups or internal mics plug into Ch1 or Ch2 inputs
input
instrument mic, vocal mic
plugged into mic input 1
external effects routed
through the insert
PUSH
stage tuner
fed by tuner out
input
out
reverb
15
11 Specifications
GAIN RANGE (Input to DI Output)
CH1 MIC
CH1 Inst
CH2 Inst
Boost
THD+N 1kHz, 22Hz-22kHz BW (MIC Input to DI Output)
@ 20dB Gain +10dBu out
@ 40dB Gain +10dBu out
@ 60dB Gain +10dBu out
INTERMODULATION DISTORTION - SMPTE/DIN 4:1 7kHz/50Hz (MIC Input to DI Output)
@ 40dB Gain +10dBu out NOISE - REFERRED TO INPUT CH1 MIC @60dB Gain 22Hz-22kHz BW
50Ω source
CMRR @60dB Gain
100Hz
1kHz
10kHz
FREQUENCY RESPONSE (Input to DI Output)
Mic input @ 40dB Gain -3dB
Inst input @ 20dB Gain -3dB
I/O IMPEDANCE
CH1 MIC Input
CH1 Inst Input
CH2 Inst Input
Insert Input
DI Outputs
Amp, Tuner, Headphone and Insert Outputs
SIGNAL / PEAK LED METER
Green threshold
Red threshold
MAXIMUM INPUT LEVEL
CH1 MIC
CH1 Inst
CH2 Inst
MAXIMUM OUTPUT LEVEL - 100k Ohm load, 0.1% THD
DI Outputs
Amp, Tuner, Headphone and Insert Outputs
High Pass Filter / Notch Filter
High Pass Filter
Notch Filter
EQ
Gain
Low Frequency
Mid Frequency
Mid Frequency Q
High Frequency
OUTPUT NOISE 22Hz-22kHz BW @ MIN Gain
CH1 MIC Input (50 ohms) to DI Output
CH1 Inst Input to DI Output
CH2 Inst Input to DI Output
EXTERNAL FOOTSWITCH
MUTE (TIP)
BOOST / TOGGLE (RING)
POWER CONSUMPTION
100-240VAC 50/60Hz
WEIGHT and DIMENSIONS
3.2lbs
16
21-62dB
Low Gain: 3-44dB / High Gain / 21-62dB
-1.5-36.5dB
0-9dB
<0.0045%
<0.0050%
<0.010%
<0.05%
<-128dB
>55dB
>75dB
>75dB
20Hz – 65kHz
20Hz – 65kHz
8.1kΩ
HI: 10MegΩ / MED: 1MegΩ / LOW: 10kΩ
HI: 20MegΩ / MED: 1MegΩ / LOW: 332kΩ
10kΩ
150Ω
150Ω
-10dBu
+10dBu
0dBu
Low Gain: +21dBu / High Gain: 0dBu
+20.5dBu
Line: +20dBu / Mic: -6dBu
+22dBu
20Hz – 1kHz @ -12dB/octave
20Hz – 1kHz, >-35dB, Q>1.0
+/- 12dB
Low Range: 125Hz Shelving / High Range: 250Hz Shelving
Low Range: 70Hz – 880Hz / High Range: 670Hz – 8kHz
0.5 – 5
2kHz Shelving
<-88dBu
<-88dBu
<-98dBu
Momentary – Normally Open – Switch to GND < 10Ω
Momentary – Normally Open – Switch to GND < 10Ω
10 Watts Max
H3.0” x W9.5” x D5.5”
12 Cleaning and Maintenance
Your Felix is chassis is constructed out of high quality aluminum and steel. Under normal circumstances, very little maintenance is
required to keep it looking good. However, if you find it getting more dirty or dusty than you like, here are some cleaning tips: We
recommend using a little shot of Windex™, applied to a clean, dry, lint free cloth. Gently wipe all surfaces, taking care not to allow
the cleaning product to build up around or under the knobs.
13 Warranty
•
Grace Design warrants this product to be free of defective parts and workmanship for a period of five years. This warranty
period begins at the original date of purchase and is transferable to any person who may subsequently purchase the product
during this time.
•
This warranty excludes the following conditions: normal wear and tear, misuse, customer negligence, accidental damage,
unauthorized repair or modification, cosmetic damage and damage incurred during shipment.
•
During the time of this warranty, Grace Design will repair or replace, at its option, any defective parts or repair defective
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 product directly with Grace Design by telephone (303-823-8100 Monday-Friday 9:00am to 5:00pm MST), or you
can register your product online at www.gracedesign.com.
•
This warranty is in lieu of all other warranties whether written, expressed, or implied, INCLUDING ANY WARRANTIES OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
•
In no event will Grace Design be liable for lost profits or any other incidental, consequential or Exemplary damages, even if
Grace Design is aware of the possibility of such damages. In no event will Grace Design’s liability exceed the purchase price of
the product.
•
This warranty gives the customer specific legal rights. The customer may also have other rights, which vary from state to state.
Some states do not allow limitations on implied warranties or consequential damages, so some of the limitations of the above
may not apply to a particular customer.
17
14 Manual Revisions
18
Revision
Page
Change
Date
Initials
A
all
Initial release
05/08/2015
edg
Was this manual useful for you? yes no
Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Download PDF

advertising