L.R. BAGGS PREAMPS
GIGPRO
USER'S GUIDE
483 N. FRONTAGE RD.
NIPOMO, CA 93444
CONTROLS
A. Treble: Use to add or subtrac t th e high est frequen cies o r "p re sence" .
B. Bass: Use to add or subtr act the lowe r freq uenc ies, add "warmth" or to cut
feedba ck.
C. Tr im: The Tr im Cont rol is a mov eab le 12 dB/oc tave low cut fi lte r t hat is
adjust able fr om 27Hz to 2 00Hz. This filt er custo mizes the e ffect of the bass
control and m akes it possib le to boost the low en d in th e war mth reg ion
withou t add ing exce ssive low ba ss. It is also useful to tame excessiv e low end
from m ini-m ics a nd da nce clu b sub -woofer s.
D. Vol ume C ontrol: Un like gain , who se ad just ment will affec t the cha racte r and
person alit y of the soun d, the volume simply co nt rols th e a mount of th e s igna l
that get s out of the box. The Gigpr o will likely be the quietest t hing in your
signal chain . So for the best sys te m signal to noise ratio, we recomme nd that
you ru n the volume as h igh as you c an wi thout caus ing the P.A. to distor t.
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E. 1/ 4” Outpu t: Th is is a regular unbal anced ou tput for a stan dard mono cabl e.
You can p lug t his i nto jus t abo ut anyt hing.
F. Invert: Thi s contr ol ch anges the polar ity of the si gnal. Whe n the butt on is
out, the output will be in pha se with the input sign al. Phase affec ts the way
the guita r top is pres surized by the speak ers. Whe n the gui tar top a nd s peaker
are ou t of phase with each other, low-e nd feed back will o ccur.
G. Ba ttery Status LED: The batt ery statu s L ED rema ins on at all times when the
unit is p lugg ed in . A s the bat ter y wea kens the ligh t wil l gra duall y dim . When it
become s dif ficul t to se e, rep lace the bat ter y.
H. Ba ttery Com par tme nt: To ch ange you r bat ter y, r emove th e two screw s
adjace nt to the bel t clip usi ng a screwdriv er or a dime. Slide the preamp out
of the hou sing and rep lace the bat ter y.
I. Pha ntom Power Swi tch: If you are us ing a mini- mic tha t requ ires ph antom power, open th e Gigpr o as de scrib ed abo ve. The ph antom power
switch is a djacent to th e inp ut ja ck. Cauti on: Do n ot u se phan tom p ow er wi th anyt hing other than a mini -mic or a device that spec ifica lly req uires
it. Damag e may o ccur!
J. G ain Co ntrol: See bel ow.
K. 1 /4” Inp ut: This is a re gula r unbal anced inpu t for a stan dard mo no ca ble.
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S E T T I N G T H E G A I N
Gain is no t vol ume. Gai n is the amount of am plifi catio n t hat i s appli ed to an in put sign al to boost it to a usefu l l ev el. To a ccomo date a w ide range
of picku ps, act ive de vices and such , th e Gi gpro has adju stable ga in. The idea is to adjus t th e ga in to find a wi ndow betwe en hiss and distorti on.
For instanc e, if you are using a low output passive pickup suc h as the Ribb on Transducer, and yo u fail to turn the gain way up, yo u will nee d to
turn the PA up s o hi gh to hear the pick up t hat there will be a lo t of hiss . Convers ely, if y ou pl ug in a high outp ut ac tive pick up and d o not tur n th e
gain way down, there will be ma ssive disto rti on. The Gi gpro is so quiet that t he gain windo w is fairly wid e. But there is a small er “sweet sp ot”
within it.
Here’s how to fi nd it: Wit h your Gigpro plugged into yo ur P.A. an d your pi ckup or devi ce plug ged in to it, play your inst rument very hard. Tu rn the
gain trim up (clo ckwis e) slowl y while p laying unti l yo u begin to he ar s ome distor tion, t hen bac k the gain of f (c ounter- cloc kwise ) until the
distor tion ju st di sappe ars. This s ettin g wil l be both the r iche st so unding and the m ost q uiet. Once you ha ve dete rmine d your prefer re d se tting, we
recomm end that yo u leave the gain contro l alone. D o not use the gain co ntrol as avol ume cont rol. Usi ng it in th is mann er will va ry the charac ter
of you r sou nd as you ad just it up and do wn.
USING PHANTOM POWER
It is imper ative that the phantom powe r swit ch be in the off posit ion when using any pick up or device that is
not specif icall y designe d to be used with phantom power. Havi ng the pha ntom power on inappropr iately wil l
result in a t hin an d weak pi ckup sound. If your non- phantom -powera ble pi ckup sounds wimpy, be sure that the
Gigpro 's ph antom p ower sw itch is off.
SPECIFICATIONS
Size: 4.75 x 2.85 x 1.25
Weight (with battery): 6.6 oz.
Battery Type: Single 9V
Power Consumption: 1.6mA
Battery Life: 300+ Hours
Class: Pure Class A all discrete
EQ: Passive
Treb: +/- 6dB @ 7kHz
Bass: +/- 6dB @ 80Hz
Low Cut: +/- 6dB @ 80Hz
(adjustable) 27Hz to 200Hz
Gain: +6dB to +28d
Signal-To-Noise: -90dB, 27Hz-20kHz unweighted
Input Impedance: 10 Megohms
Output Impedance: 800 Ohms
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