User Manual
INT RODUC TION
IMP ORTAN T NOTES
GUI DED TOUR - F RON T PAN EL
SET TING UP G UID E…
in ca se you ar e new to th is!
SPE CIFIC ATION S
CATALOG
Congratulations on buying a MJOLNIR 15 watt tube
head from Joyo.
To ensure the best performance, please read this
owner's manual carefully and retain it for future
reference.
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Spea ker Cab le
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The ex clama tion poi nt withi n a n e quila teral tr iangl e i s i ntend ed to alert th e u ser to the
pre sence of im porta nt op erati ng an d mai ntena nce ( servi cing) instr uctio ns in the liter ature
acc ompan ying th e produ ct.
INS TRUCT IONS PE RTAINI NG TO A RIS K OF FIRE , ELECT RIC SHO CK,
OR IN JURY TO PE RSO NS.
IMPORTA NT N OTES
Rea d these i nstru ction s.
Kee p these i nstru ction s.
Hee d all war nings .
Fol low all i nstru ction s.
Do no t use thi s appar atus ne ar wate r.
Cle an only w ith a dry c loth.
Do n ot bl ock an y of the ven tilat ion o penin gs. I nstal l in a ccord ance w ith t he man ufact urers
ins truct ions.
Do n ot in stall near any h eat so urces such as ra diato rs, he at re giste rs, s toves , or o ther a ppara tus
(in cludi ng ampl ifier s) that p roduc e heat.
Do n ot def eat the safet y purp ose of the po lariz ed or g round ing-t ype pl ug. A pol arize d plug h as two
bla des wi th on e wide r tha n the other. A groun ding t ype p lug ha s two blade s and a thi rd gro undin g
pro ng. The w ide bl ade or t he thir d pron g are pr ovide d for yo ur safe ty. When the pro vided plug do es
not f it into y our out let, co nsult a n elect ricia n for rep lacem ent of th e obsol ete out let.
Pro tect t he pow er cor d from bei ng wal ked on or p inche d part icula rly at pl ugs, c onven ience
rec eptac les, an d the poi nt wher e they ex it from t he appa ratus .
Onl y use att achme nts/a ccess ories s pecif ied by th e manuf actur er.
Nev er use with a car t, st and, tripo d, bra cket, or t able e xcept as s pecif ied by the manuf actur er, or
sol d with t he app aratu s. Whe n a car t is use d, use cau tion w hen mo ving t he cart /appa ratus
com binat ion to av oid inj ury fro m tip-o ver.
Unp lug thi s appar atus du ring li ghtni ng stor ms or whe n unuse d for lon g perio ds of tim e.
Ref er a ll s ervic ing t o qu alifi ed s ervic e pe rsonn el. Servi cing is requi red when the appa ratus has
bee n dama ged in any wa y, such as po wer-s upply cord o r plug is da maged , liqu id has been s pille d
or ob jects h ave fal len int o the app aratu s, the a ppara tus has b een exp osed to r ain or mo istur e, does
not o perat e norma lly, or has b een dro pped.
Don 't mix th e speak er cabl e with th e pedal o ne(in dicat ed on the c able)
The lig htnin g f lash with ar rowhe ad symbo l, w ithin an equ ilate ral tria ngle, is int ended to
ale rt the use r to the pre sence o f unins ulate d “ dange rous vo ltage ” withi n t he prod uct’s
enc losur e that may b e of suff icien t magni tude to co nstit ute a ris k of elec tric sh ock to
per sons.
GUIDED TOUR - F RO NT P AN EL
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1. Gu itar in put: Thi s is wher e you plu g in your g uitar
TIP : Obvio usly y ou can use sto mp box es like Com press ors, O verdr ives a nd Dist ortio ns, Ph asers ,
Fla ngers e tc. in fr ont of y our amp . If you a re usin g quite a few of th em, mak e sure y ou also u se a BUF FER
to k eep th e qual ity of your g uitar signa l as h igh as possi ble. L ong ca bles ( and ba d cab les) s uck th e tone
out o f your so und and a c hain of s tomp b oxes, e ven wit h True Byp ass, ar e essen tiall y just a l ong cab le, so
mak e sure yo u keep yo ur sign al stro ng.
2. Th is li ttle LE D wi ll sh ow y ou w hat c hanne l is s elect ed. Gre en fo r CL EAN and r ed fo r
DIS TORTIO N.
3. Ch annel S witch : CLEAN a nd DISTO RTION .
4. Th is is the G AIN con trol fo r the CL EAN cha nnel. W ith hig her set tings y ou mig ht get so me gris tle and
a sligh t ov erdri ve in t he C lean cha nnel. Thi s is als o d epend ent on your pick ups. Pick ups with hig her
out puts w ill “p ush” t he tub es more and gi ve you more d rive. Singl e Coil picku ps usu ally h ave le ss out put
tha n Hu mbuck ers. It also depe nds on t he s tate of the BOOS T swi tch. All thes e fa ctors inf luenc e ho w
muc h gain wi ll be gen erate d in the pr eamp se ction o f the MJO LNIR.
5. Bass cont rol o f th e CLE AN c hanne l: at 12 o’clo ck i t is neut ral. Turnin g it cloc kwise wil l bo ost t he
bas s and cou nterc lockw ise wil l cut or at tenua te the ba ss freq uenci es.
TIP : We all kn ow it’s nice to h ave a fa t sound and mak e the sp eaker m ove the pants a round y our le gs, but
rem ember : You also ha ve a bas s p layer in the ban d an d he ha s a job to do, so give him so me r oom
(fr equen cies) to do his j ob. Tog ether you w ill s ound like a n uns toppa ble a rmy if you play tightl y and get
out o f each ot her’s w ay.
6. M iddle cont rol o f the CLEAN chann el: a t 12 o ’cloc k it is neu tral. Turni ng it clock wise will b oost the
mid s and cou nterc lockw ise wil l cut or at tenua te the mi d frequ encie s.
TIP : Most o f what de fines a guita r soun d happe ns her e. The MI DS are t he mos t impor tant fr equen cies f or
the gu itar play er. Just loo k a t o ur t ypica l 1 X12 spea ker. They can ’t do very low bas s a nd they mos t
cer tainl y canno t produ ce a lot of h igh fr equen cies. S o try to le arn wha t the MID S sound l ike. S ee how th ey
add w armth w hen you i ncrea se this k nob and h ow they c an dig a ho le in you r sound i f you att enuat e.
7. Treble contr ol of the CLEAN chan nel: at 12 o’clo ck it is n eutra l. Tur ning it clo ckwis e wil l boo st th e
tre ble and c ounte rcloc kwise w ill cut , or atte nuate , the tre ble fre quenc ies.
TIP : Play wi th this c ontro l for cla rity an d bite. Tu rning i t down a b it coul d help yo u tame pi ercin g singl e coil
sou nds.
Con gratu latio ns on buy ing a MJO LNIR 15 Wa tt tube h ead fro m Joyo.
Jus t in ca se you don’t know about the aw esome power of MJ OLNIR , let u s shar e some of th e myth ology
wit h you. M JOLNI R is th e hamm er of Th or. Thor is the son of O din, f ather and ru ler of t he god s of Asg ard
fro m the ancie nt No rse My tholo gy. Tho r, als o kno wn as the go d of thund er, wie lds t his w eapon which is
fam ed for havin g the power to le vel mo untai ns. Ca n you begin to gu ess wh y we c hose t his na me fo r our
met al ampl ifier ?
In t he mo vie ve rsion of Th or, bas ed on the c omic s uperh ero, O din e nchan ts MJO LNIR so tha t onl y Thor
can pic k i t u p i f he is wo rthy and pur e o f h eart. No one ot her than Tho r h as the stre ngth to pick up
MJO LNIR an d unlea sh its fu ry. Are YOU wo rthy of i ts powe r?
I thi nk it i s clear now th at this name w as not c hosen light ly. It en compa sses a ll that we wan ted to a chiev e
wit h this am plifi er: Pow er - Meta l - Stren gth.
Now l et’s get i nto the d etail s…
I s ugges t you tak e a few m inute s to brow se th rough thos e pa ges, there migh t ac tuall y be some usef ul
inf ormat ion hid den he re. We w ant to m ake su re you a re tre ating y our ne w MJOLN IR wit h resp ect, so that
it se rves yo u well wi thout f ail.
MJO LNIR i s an a mplif ier w ith a two c hanne l desi gn. B oth ch annel s are compl etely inde pende nt of each
oth er and can be set up d iffere ntly for a wi de varie ty of sound s. One of the ma in chara cteri stics of
MJO LNIR i s its p ercus sive a ttack , whic h furt her un derli nes t he ham mer an alogy. Each n ote ju st hit s you
wit h a wall of s ound.
The CLEA N cha nnel can b e mol ded i nto m any di ffere nt so unds with the f lexib le th ree b and E Q sec tion
and t he Pre sence contr ol. The BOOST s witch also ap plies to this chann el, so p lay ar ound w ith a bo osted
cle an soun d.
If you e ngage the PUSH switc h, th e CLE AN ch annel will tran sform into a cr unch chann el wh ich c an be
pus hed ev en fur ther w ith th e BOOS T swit ch. He re you can un leash amazi ng rhy thm so unds, exper ience
ove rdriv e sound s you ar e famil iar wi th from the gre ats in r ock his tory a nd gene rally hear th e “bri tish” s ide
of MJ OLNIR .
Sho uld th is no t be e nough for y ou, s witch to th e DIS TORTIO N cha nnel t o get more GAIN than y ou ev er
dre amed of . In th is chan nel, t he effe ct of t he BOOS T swit ch is le ss not iceab le beca use th ere is a lread y a
lot o f gain a t work . The DIS TORTIO N chan nel fea tures the MID CUT swi tch, wh ich he lps you to dig a n ice
hol e in t he mi d freq uenci es to get t hose covet ed mo dern r ock a nd me tal so unds. Thes e mode rn rh ythm
sou nds ha ve le ss fr equen cy co ntent at aro und 4 00-50 0 Hz, wh ich he lps t he ba ss an d high mi d
fre quenc ies to ha ve more r oom to pu nch you i n the fac e.
For a m ore cla ssic me tal so und, le ave thi s switc h in the n ormal p ositi on. For c reamy l ead to nes, gi ve your
sou nd some k ids and t hin out t he bass j ust a bit .
Obv iousl y, the MJOL NIR has 4 , 8 and 16 Oh m ou tputs so that you can c onnec t an y ava ilabl e sp eaker
cab inet.
The b uilt in F X Loop (l ocate d betwe en the P reamp a nd the Po wer-A mp) can b e used fo r your F X pedal s or
rac k ge ar. T his type of Loo p i s pr imari ly used to effe cts that nee d to be beh ind the dist ortio n, which
app lies t o some t ypes o f modu latio n, EQ a nd esp ecial ly tim e base d effec ts lik e Dela y and R everb . It ca n
be swit ched off whe n it is not in use for a clea ner, more dir ect, sig nal path. The se nd l evel from th e
pre amp can b e adjus ted to ma tch the r equir ed inpu t of your e ffects .
For l ive per forma nce yo u can use t he inc luded f ootsw itch to c hange bet ween th e CLEAN and t he
DIS TORTIO N chann el.
Let ’s talk so me tech h ere…
As you can c learl y see , th e MJO LNIR is a n ALL METAL desig n, ju st l ike i ts i nspir ation , the ham mer o f
Tho r itsel f. Unli ke the ha mmer, it u ses 3 EC C83 tub es (12A X7) and 1 E CC82 tu bes (1 2AU7) i n the pow er
amp . (Actu ally, who k nows ho w the ham mer wor ked, fo r all we kn ow it mig ht have h ad tube s)
In th e follo wing pa ges we wi ll go thr ough ev ery con trol of t he MJOL NIR in de tail.
Add ition ally, feel free to ch eck out o ur we bsite www. joyoa udio. com f or co mplet e inf ormat ion about our
ful l produ ct line .
INTRODU CT ION
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8. T his is t he MAS TER vo lume f or the CLEAN c hanne l. Use this k nob in conju nctio n with t he GAI N
kno b to set up y our sou nd and ov erall l evel.
TIP : Si nce the MJO LNIR is a 15 Watt tube amp lifie r, i t d oes not poss ess the hea droom of the mo re
fam iliar 50 or 100 Watt M etal A mps. In th ose Am ps, th e pow er am p wil l sim ply ma ke th e pre amp s ound
lou der wit hout a dding t oo muc h power a mp dis torti on to th e sound . Powe r amp di stort ion wil l sound more
com press ed an d wobb ly. Your soun d can becom e les s def ined with a les s pron ounce d att ack. Liste n to
wha t happ ens to y our so und at highe r volu mes and stop i ncrea sing t he vol ume wh en the e ffect becom es
und esira ble. Wit h t his “lo w w attag e” type of am plifi er, the pow er amp dis torti on plays a mu ch more
imp ortan t role i n the scu lptin g of you r soun d. You can u se this to your a dvant age, b ut if yo u are not aware
of it , it can ea sily re sult in u ndesi rable m uddin ess.
9. Pr esenc e contr ol of the C LEAN ch annel : This is a nothe r form of H igh End ( or Trebl e) cont rol.
10. PUSH switc h: Thi s swi tch on ly app lies t o the C LEAN chann el. Wh en you PUSH t he ch annel (in th e
UP p ositi on), i t goes int o over drive an d beco mes th e perf ect cr unch i n bet ween t he CLE AN and
DIS TORTIO N cha nnel. In c onjun ction wit h the BOOS T swi tch t his o ffers you a wid e var iety of di ffere nt
gai n setti ngs.
11. Po wer ind icato r: show s you the a mp is ON.
12. BOO ST s witch : Th is s witch wor ks f or b oth chann els. In the UP p ositi on i t ad ds extra gai n to the
pre amp.
TIP : Sin ce th e DIS TORTIO N cha nnel alrea dy ha s a l ot of gain , the effec t of the B OOST switc h is more
not iceab le when b eing us ed in the C LEAN ch annel o r in the pu shed CL EAN cha nnel.
13. This is the GAIN cont rol f or t he DI STORT ION chann el. An ythin g up to 12 o ’cloc k is a hi gh g ain
chu nk sou nd an d eve rythi ng af ter is brut al hi gh gai n mad ness. This is al so de pende nt on your picku ps.
Pic kups wi th high er outp uts wil l push t he tube s more an d give y ou more d rive. S ingle Coil pi ckups u suall y
hav e less o utput tha n Humbu ckers . Usua lly the se typ es of hi gh gai n sound s are b eing us ed wit h
hum bucki ng ( dual coil ) pi ckups . It also dep ends on the state of the BOO ST sw itch. All the se f actor s
inf luenc e how m uch ga in wil l be ge nerat ed in t he pre amp se ction of the MJOLN IR, bu t rest assur ed, th is
amp h as more g ain tha n you wil l ever ne ed!
14. B ass co ntrol of the D ISTOR TION c hanne l: at 12 o’clo ck it i s neutr al. Tur ning i t cloc kwise w ill bo ost
the b ass and c ounte rcloc kwise w ill cut , or atte nuate , the bas s frequ encie s.
TIP : We all k now it s nice t o have a f at sou nd and m ake the speak er mov e the pa nts aro und yo ur legs , but
rem ember : You also ha ve a bas s p layer in the ban d an d he ha s a job to do, so give him so me r oom
(fr equen cies) to do his j ob. Tog ether you w ill s ound like a n uns toppa ble a rmy if you play tight ly and get
out of eac h othe rs way (agai n… ta lking about frequ encie s). In metal , the b ass pl ayer very o ften d ouble s
the g uitar p art, so if you ma ke sure y ou are p layin g in perf ect uni son, y ou don’ t need a ve ry “ba ssy” so und
to mo ve moun tains , you jus t need to b e tight w ith the b ass pla yer.
15. Mid dle contr ol o f th e DI STORT ION chann el: at 1 2 o’ clock it is neut ral. Turni ng i t cl ockwi se w ill
boo st the mi ds and co unter clock wise wi ll cut, o r atten uate, t he mid fr equen cies.
TIP : Most of what de fines a guita r sound happe ns here . The MI DS are th e most i mport ant fr equen cies fo r
the gu itar play er. Just loo k a t o ur t ypica l 1 X12 spea ker. They can ’t do very low bas s a nd they mos t
cer tainl y canno t produ ce a lot of h igh fr equen cies. S o try to le arn wha t the MID S sound l ike. S ee how th ey
add warm th w hen you i ncrea se t his knob and how they can dig a ho le in you r so und i f yo u at tenua te.
Spe aking o f a hole i n the MI DS… sin ce the D ISTOR TION ch annel a lso ha s a MID CU T switc h, try t o learn
how the M ID CUT swit ch and the M IDDLE cont rol w ork wi th ea ch oth er. Do es it make sense to CU T the
mid s with th e switc h, but ha ve the MI DDLE co ntrol a t maxim um? You fin d out!
16. Tr eble co ntrol o f the DIS TORTI ON chan nel: at 1 2 o’clo ck it is ne utral . Turnin g it cloc kwise w ill boo st
the t reble a nd coun tercl ockwi se will c ut, or at tenua te, the t reble f reque ncies .
TIP : Play wi th this c ontro l for cla rity an d bite. Tu rning i t down a b it coul d help yo u tame pi ercin g singl e coil
sou nds.
17. T his is th e MASTE R volu me for th e DISTO RTION c hanne l. Use th is knob in conj uncti on with t he
GAI N knob to s et up you r sound a nd over all lev el.
TIP : Si nce the MJO LNIR is a 15 Watt tube amp lifie r, i t d oes not poss ess the hea droom of the mo re
fam iliar 50 or 100 Watt M etal A mps. In th ose Am ps, th e pow er am p wil l sim ply ma ke th e pre amp s ound
lou der wit hout ad ding to o much po wer amp d istor tion to t he soun d. Powe r amp dis torti on will s ound mo re
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22. AC input : use th e inclu ded pow er cor d for con necti on. Do n ot dam age the g round ing pi n of the p ower
plu g, othe rwise i t may cau se seve re elec tric sh ock.
23. FX Lo op SEN D: He re you can c onnec t the pream p outp ut of the M JOLNI R to y our ef fects pedal s or
rac k eff ects. The outpu t use s a 1/4“u nbala nced conne ctor. The m aximu m le vel g oing to y our e ffect s is
+4d Bu
TIP : As a rou gh gui de to e ffect s pedal routi ng, re membe r that time b ased e ffects like d elays and re verbs
sho uld go b ehind the dist ortio n an d th erefo re i nto the FX L oop. Some mod ulati on ef fects can als o go
her e, but th at dep ends on y our tas te. A phas er in fr ont of yo ur dist ortio n will s ound di ffere nt than a phase r
beh ind i t. An EQ (l ike a grap hic EQ pe dal f or ex ample ) is more effec tive in th e FX Loop beca use i t wil l
scu lpt th e sou nd tha t the pream p has creat ed. N oise Gates shoul d als o be u sed he re si nce th ey sh ould
con trol th e noise b eing cr eated i n the pre amp.
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GUIDE D TOUR - R EAR P ANE L
com press ed an d wobb ly. Your soun d can becom e les s def ined with a les s pron ounce d att ack. Liste n to
wha t happ ens to y our so und at highe r volu mes and stop i ncrea sing t he vol ume wh en the e ffect becom es
und esira ble. Wit h t his “lo w w attag e” type of am plifi er, the pow er amp dis torti on plays a mu ch more
imp ortan t role i n the scu lptin g of you r soun d. You can u se this to your a dvant age, b ut if yo u are not aware
of it , it can ea sily re sult in u ndesi rable m uddin ess.
In t he CL EAN c hanne l it i s muc h easi er to hear when the po wer a mp di stort ion se ts in beca use yo u wil l
hea r a for m of o verdr ive an d comp ressi on, b ut wit h all t he ga in of t he DI STORTI ON cha nnel, it mi ght be
har der to beco me aw are o f the point wher e you are p ushin g the amp too mu ch. Tr y to liste n to t he sp ot
whe n your s ound be comes less re activ e and t he atta ck und efine d. At hig her mas ter vo lume se tting s your
sou nd mig ht ge t mudd y and less “on th e dot ”. You m ight want t hat, depen ding o n the style of mu sic y ou
pla y. Just use y our ear s!
18. P resen ce cont rol of th e DISTOR TION ch annel : This is a nothe r form of H igh End ( or Trebl e) cont rol.
19. MID CUT Swi tch: In the DOWN posi tion ther e is no effe ct a nd i n th e UP pos ition , th ere will be a
not iceab le atten uatio n of th e M ID frequ encie s i n t he 4 00-50 0 H z r ange. Th is is w here the ma gic for
mod ern roc k and met al soun ds happ ens.
TIP : By re ducin g the w arm so unds o f the l ower m id fre quenc ies, t he bas s and h igh ki ds hav e more room
to com e ou t. The soun d w ill feel a bit mor e c old, but al so much mor e p owerf ul a nd tight . I f y ou are
sho oting f or mor e class ic met al soun ds (th ink 80s metal ), you a ctual ly don’ t need a lot of b ass, bu t rath er
a mi d boo st, so keep your hands of th e MID C UT sw itch a nd pl ay wit h the BASS a nd MI DDLE c ontro l to
ach ieve t he sou nd you are lo oking f or. For cream y lead sound s, add ing a l ot of k ids is very i mport ant, s o
don ’t be a fraid to se t the M IDDLE to ma ximum and ta ke th e BASS down a bit. Now ad d some nice delay
(li ke the Jo yo Analo g Delay ) in the FX L oop and u nleas h your in ner shr edder !
20. STAN DBY switc h: F irst, po wer on t he amp. After plu gging in the gu itar you are rea dy t o f lip the
Sta ndby s witch into t he ON p ositi on and you a re rea dy to g o. Alwa ys mak e sure you a re put ting t he amp
bac k i n S tandb y w hen you are un plugg ing your gu itar or eff ects. Th is ensur es that the lo ud sound s
cau sed by un plugg ing don ’t get am plifi ed, whi ch can da mage yo ur spea kers an d your he aring . .
21. P OWER sw itch: t urns on t he MJOL NIR.
Set ting up y our n ew M JOLNI R for the fir st ti me i s pre tty simpl e and sho uld o nly take you a fe w
min utes:
1.R emove a ll pack ing mat erial s (save t hem in ca se of ne ed of fut ure ser vice) a nd deci de wher e MJOLN IR
sho uld be pl aced. Ty pical ly this w ill be on t op of a cab inet. To av oid pot entia l overh eatin g probl ems, ma ke
sur e that th e rear pa nel is un obstr ucted a nd that t here is g ood ven tilat ion aro und the e ntire u nit
TIP : If you are s ettin g it up on a sta ge of you r bands pr actic e room, r ememb er that m id and hig h
fre quenc ies are direc tiona l. This means that s tandi ng righ t in fr ont of y our sp eaker s ounds reall y good t o
you r k nees, but yo u w ill want to mak e i t e xtrem ely loud so tha t y our ears ca n a lso hear eve rythi ng.
Usu ally yo u will he ar the o ther gu itar pl ayer on t he othe r side o f the roo m a lot lo uder th an your self an d he
wil l hear you m uch l ouder. We gui tar p layer s are not th e sma rtest peopl e on t he pl anet s ometi mes… so
let’ s cha nge th at. Ra ther t han st andin g righ t in fr ont of your s peake r, take a few s teps a way fr om it an d
you wil l fin d th at y ou d on’t have to make it loud at all. Or, just switc h po sitio ns w ith the other guit ar
pla yer. You sta nd in fro nt of his a mp and he i n front o f yours a nd you wi ll hear y ourse lf a lot be tter.
2.C onnec t your c abine t to th e speak er out put wi th a spe aker c able, m ake su re the imp edanc e is
mat ched.
24. FX Loop RETUR N: Her e you ca n conn ect the outpu t from y our eff ects b ack in to the p ower a mp of th e
MJO LNIR. Th is inpu t uses a 1/ 4“unb alanc ed conn ector.
25. S end Lev el: Thi s mini kn ob can he lp you ad just th e level g oing to y our effe cts.
26. B YPASS L OOP swi tch: T his sw itch wi ll tak e the l oop out of the signa l path i n case you are not us ing
it. Th is help s to kee p the sig nal pat h clean a nd impr oves ov erall s ound. I f you don ’t have a ny effe cts in th e
FX Lo op, kee p it in th e ON posi tion. O bviou sly, tur n it OFF w hen you u se effe cts… pr etty se lf expl anato ry.
Be c arefu l, if yo u have it OFF witho ut any e ffect s conn ected , the co nnect ion be tween pream p and p ower
amp w ill be br oken an d no soun d will ge t to the po wer amp .
27. F ootsw itch: T he fro nt pane l’s cha nnel sw itch i s not act ive wh en the fo otswi tch is c onnec ted; yo u can
use s tereo 1 /4” aud io cabl e to conn ect.
28. 4Ω sp eaker outp ut soc ket: Well, I gue ss you know what to do . Jus t make sure you a re us ing a 4Ω
cab inet wi th this o utput . Als o, make s ure you a re usin g a SPEAK ER CABL E, not an i nstru ment ca ble. Yes,
the re is a d iffer ence. It usu ally s ays on the ca ble it self. S peake r cabl es are often thick er tha n inst rumen t
cab les and c an carr y much mo re elec trici ty.
29. 8 Ωspea ker out put soc ket: pl ease re fer to th e 8Ω desc ripti on.
30. 1 6Ωspe aker ou tput so cket: p lease r efer to t he 16Ω de scrip tion.
31. Voltage s witch b etwee n 115V and 2 30V: Mak e sure th is is set t o the vol tage us ed in you r count ry.
109
SETTING U P GUIDE… in c as e you are new t o th is!
3.P lug in th e power c able wh ile mak ing sur e the pow er swit ch on the a mplif ier is no t in the ON p ositi on.
4.U se a stan dard mu sic ins trume nt cabl e to conn ect you r ampli fier or e ffect pe dals to t he inpu t jack on t he
fro nt pane l.
5.I f you ar e using p edals or effe cts tha t shou ld be in t he FX Lo op (e.g . time b ased e ffects ), con nect th ose
to th e loop an d turn th e switc h OFF.
6.O n the f ront panel , make sure the Ma ster Vo lume is set to mi nimum or a lo w set ting s o you don’t g et
blo wn away w hen you t urn on th e amp.
7.F lip th e powe r swit ch to th e ON po sitio n. Not hing h appen s. Wel l, tha t is no rmal. A fter a ll, you bough t a
vac uum tube ampl ifier and th ose thing nee d t o wa rm u p be fore the y ca n do the ir job. So, wait 20- 30
sec onds u ntil the t ubes h ave r eache d thei r ope ratin g tem perat ure. N ow yo u can also flip t he STA NDBY
swi tch and g et clos e to your b reaki ng meta l sound .
8.S lowly i ncrea se the vo lume an d gain to t he desi red lev els.
9.A djust the Bass, Middl e and Trebl e con trols to t aste. When you get a grea t set ting t hat c omple ments
you r instr ument a nd play ing sty le, it’s a g ood ide a to writ e it down f or futu re use.
10. Do the sa me for th e other c hanne l. (ste ps 8 and 9) .
11.R ememb er to swi tch the a mp into s tandb y when ch angin g guita rs or effe cts to av oid und esira ble pop s.
Now that it’s all s etup you a re re ady t o bla st yo ur au dienc e str aight to As gard. We t hink you a re
now w orthy t o wield t he awes ome pow er of MJO LNIR.
If you e ncoun ter diffi culty with any aspe ct of set ting up or usi ng yo ur J oyo M JOLNI R Amp lifie r,
you can call JOY O (+ 86-75 5-297 65393 ) bet ween 9 a .m. and 5 p.m . (Ti me z one is H ong K ong), or
con tact yo ur loca l deale r for tec hnica l help.
1. Ou tput po wer： (1 kH z, 8 ohm, )
2. No minal i nput le vel： (1 kH z)
3. S/ N ratio： ( 1 Wrms @ 1 kHz )
4. Dy namic r ange： (R ated ou tput @ 1 kH z)
5. Si gnal ga in
Sen d outpu t level：
Ret urn inp ut leve l：
6. Fu se type：
7. Fu se rati ng：
AC10 0-120 V～60Hz
AC22 0-240 V～50Hz
8. Wei ght：
9. Me asure ment：
15W
-20 d Bu
Cle an chan nel 49d b；Disto rtion c hanne l 48 dB
58 dB
+4 dB
+4 dB
slo w fuse
T2A L
T1A L
7.1 k g
334 .2mm( L ) x 160mm (W ) x192m m (H)
SPECIFI CA TIONS
Foo t Switc h Port
Cha nnel Sw itch
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