Unika PA-664, PA-180, UA-3000, UA-4000 User Instructions

User Instructions

This booklet contains important information concerning the proper and safe operation of your new amplifier..

PA-Series

PA-664 / PA-1804

Made in Taiwan

Profe ssion al Power Amp lif iers

Index

02 Important Precautions

Introduction02

03 Front Panel

04 Rear Panel

05 Set Up

07 Operating Modes

09 Protection

10 Specications

UNiKA

Clip Clip Clip Clip

Signal Signal Signal Signal

POWER

CH 1

CH 2

CH 3

CH 4

Min Min Min MinMax Max Max Max

4Ch POWER AMP

PA 664

UNiKA

Clip Clip Clip Clip

Signal Signal Signal Signal

POWER

CH 1

CH 2

CH 3

CH 4

Min Min Min MinMax Max Max Max

PA1804

4Ch POWER AMP

PA

UNiKA

1804

UNiKA PA-664/PA-1804

pag e 1

This symbol is intended to alert the user to the presence of
non insulated "dangerous voltage" within the product's
enclosure that may be of sufficient magnitude to constitute

a risk of electric shock to persons.

!

CAUTION: Risk of the electrical shock - DO NOT OPEN!

CAUTION: To reduce the risk of electrical shock, do not remove cover. No user serviceable parts inside. Refer all servicing

to qualified service personnel.

WARNING: To prevent electrical shock or fire hazard, do not expose this amplifier to rain or moisture. Before using this

amplifier read the user manual for further warnings.

This symbol is intended to alert the user of
the presence of important operating and
maintenance (servicing) instructions in the

literature accompanying the product.

Este símbolo tiene el propósito de alertar al usuario de la
presencia de “voltaje peligroso” que no tiene aislamiento
dentro de la caja del producto que puede tener una

magnitud sufciente como para constituir riesgo de corrientazo.

!

PRECAUCIÓN: Riesgo del choque eléctrico - NO SE ABRA
PRECAUCIÓN: Para disminuir el riesgo de choque eléctrico, no quite la cubierta. No hay piezas adentro que el usario puede

reparar. Deje todo mantenimiento al los técnicos cualifcados.

ADVERTENCIA: Para prevenir choque eléctrico o riesgo de incendios, no deja expuesto a la lluvia o a la humedad este amplif

cador. Antes de usar este amplif cador, lea mas advertencias en la guia de operacion.

Este símbolo tiene el propósito de alertar al
usuario de la presencia de instrucciones
importantes sobre la operación y

mantenimiento en la literatura que vienc con el producto.

Ce symbole est utilisé pur indiquer à l’utilisateur la présence
à l'intérieur de ce produit de tension non-isolée
dangereuse pouvant être d'intensité suffisante pour

constituer un risque de choc électrique.

!

ATTENTION: Risque de choc électrique - NE PAS OUVRIR!
ATTENTION: Afin de réduire le risque de choc électrique, ne pas enlever le couvercle. Il ne se trouve à l’intérieur aucune piéce

pouvant être réparée par l'utilisateur. Confier l'entretien à un personnel qualifé.

AVERTISSEMENT: Afin de prévenir les risque de décharge ou de feu, n’exposez pas cet appareil à la pluie ou à l’humidité.

Avant d’utiliser cet amplificateur, lisez les avertissements supplémentaries situés dans le guide.

Ce symbole est utilisé pour indiquer à l’utilisateur
qu'il trouvera d'importantes instructions
importantes sur l'utilisation et l'entretien de

l'appareil dans la littérature accompagnant le produit.

Dieses Symobl soll den Anwender vor unisollierten
gefährlichen Spannungen innerhalb des Gehäuses warnen,
die von Ausreichender Stärke sind, um einen elektrischen

Schlag verursachen zu können.

!

VORSICHT: Risiko - Elektrischer Schlag! Nicht öffnen!
VORSICHT: Um ddas Risiko eines elektrischen Schlages zu vermeiden, nicht die Abdeckung enfernen. Es befinden sich keine

Teile darin, die vom Anwender repariert werden könnten. Reparaturen nur von qualifzierte Fachpersonal
durchführen lassen.

ACHTUNG: Um einen elektrischen Schlag oder Feuergefahr zu vermeiden, sollte diesen Gerät nicht dem Regen oder

Feuchtigkeit ausgesetz werden. Vor Inbetriebnahme unbedingt die Bedienungsanleitung lesen.

Dieses Symobl soll den Benutzer auf wichtige
Instruktionen in der Bedienungsanleitung
aufmerksam machen, die Handhabung und

Wartung des Produkts betreffen.

CAUTION

Do not open -

risk of electric shock

CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK, DO

NOT REMOVE THE COVER. THERE ARE NO USER

SERVICEABLE PARTS INSIDE. REFER ALL SERVICE TO

YOUR AUTHORIZED DEALER.

The l ightn ing fla sh with a n arrow t riang ular
sym bol is in tende d to aler t the use r to the
pre sence o f non ins ulate d “dang erous
vol tage” w ithin t he prod ucts en closu re, and
may b e of suff ici ent magni tud e to co nsti tut e
a ris k of elec tric sh ock.

The e xclam ation p oint tr iangu lar sym bol is
int ended t o alert t he user t o the pre sence o f
imp ortan t opera ting an d maint enanc e
(se rvici ng) ins truct ions in t he user m anual
acc ompan ying th e ampli fier.

!

!

FOR O PTIMU M PERFO RMANC E AND R ELIAB ILITY

DO NO T PRESE NT THE AMPL IFIER W ITH A

SPE AKER LO AD OF LES S THAN 2 OH MS OR ANY

COM BINATI ON OF SPE AKER S TH AT TOGET HER ARE L ESS

THA N 2 OHMS!

USI NG ONE SP EAKER , IT MUST BE R ATED AT 4 OR MORE

OHM S. USIN G TWO SPE AKER S, THEY MU ST RATED E ACH AT 4

OR MO RE OHMS .

USI NG THRE E SPEAK ERS, THE Y MUST BE R ATED E ACH AT 8

OR MO RE OHMS .

POU R ASS URER LA FI ABILE TE ET OBT ENIT U NE

PER FORMA NCE OPT IMALE , NESOU METTE

JAM AIS L’AM PLIFI CATEUR A UNE C HARGE

D’I MPEDA NCE

TOTAL E INFER IEURE A 2 OHM S, NI AVEC UN H .P. N EN

COM BINAI SON DES H .P.

AVEC U N H.P., IL FAUT UN E CHARG E D’IMP EDANC E MINIM UM

DE 2 OH MS.

AVEC D EUX H.P., FAU T POUR CH AOUN UN E CHARG E

D’I MPEDA NCE MIN IMUM DE 4 O HMS.

AVEC TR OIS H.P., FA UT POUR C HAOUN U NE CHUR GE

D’I MPEDA NCE MIN IMUM DE 8 O HMS.

!

!

pag e 2

IMPORTANT PRECAUTIONS

 To reduc e the r isk o f electric al sh ock or fire, d o not e xpo se this unit r ain o r

moist ure .

 Do not s pil l wat er or other li qui ds into or on to y our u nit .

 Do not a tte mpt t o operate th is un it if the powe r cor d has b een frayed o r

broke n.

 Do not a tte mpt t o remove or br eak o ff th e gro und prong fr om th e electric al

cord. This p ron g is us ed to reduce t he ri sk of e lectr ica l sho ck and f re in
case of a n int ern al shor t.

 Disc onn ect m ain power be for e making any t ype o f con necti on.

 Do not r emo ve th e cover unde r any c ondition s. There a re no u ser

servi cea ble p arts in sid e.

 Neve r plu g thi s unit in to a dim mer p ack.

 Alwa ys be s ure t o mount this u nit i n an area that w ill a llo w prope r

venti lat ion . Allow ab out 6 ” (15 cm) betwee n thi s dev ice and a w all .

 Do not a tte mpt t o operate th is un it, if it beco mes d ama ged.

 This u nit i s int ended for in doo r use only, use of this pro duc t outdoors v oid s

all war ran tie s.

 Duri ng lo ng pe riods of non -us e, disconn ect t he un it’s main power.

 Alwa ys mo unt t his unit in a sa fe an d stable man ner.

 Powe r cor ds sh ould be rout ed so t hey are not li kel y to be w alked o n,

pinch ed by i tem s place d upo n or ag ainst them .

 Clea nin g -Th e outside of t he un it should be w ipe d own w ith a sof t clo th an d

mild cl ean er wh en need ed.

 Heat - The a mpl ifier shou ld be s ituated aw ay fr om he at sources s uch a s

radia tor s, he at regi ste rs, s toves, or ot her a ppl iance s (in clu ding ampli fie rs)
that pr odu ce he at.

 The fi xtu re sh ould be serv ice d by qualifi ed se rvi ce pers onn el wh en:

A. Th e power -su ppl y cord or the pl ug ha s bee n damag ed.

B. Obje cts h ave f allen , or li qui d has been spi lle d int o the uni t.

C. Th e appli anc e has b een expose d to ra in or w ater.

D. Th e fixtu re do es no t appear to op era te no rmall y or ex hib its a

marke d cha nge i n perfo rma nce .

Congr atu lat ions an d tha nk yo u for purcha sin g PA-6 64/ PA-1 804 a mplif ier.

These a mpl ifi ers are r epr ese ntation of U NiK A’s conti nui ng co mmitm ent t o

produ ce th e bes t and hig hes t qua lity audio p rod uct s at an affordabl e pri ce.

These a mpl ifi ers are d esi gne d to provide a b ig im pac t in soun d

repro duc tio n. Plea se re ad an d understa nd th is ma nual co mpl ete ly before

attem pti ng to o perat e you r new a mplifier. This b ook let c ontains im por tan t

infor mat ion c oncer nin g the p roper and sa fe op era tion of y our n ew am plifier.

UNPACKIN G: E ver y PA-6 64/ PA-1 804 amplif ier h as be en thor oug hly

teste d and h as be en ship ped i n per fect opera tin g con ditio n. Ca ref ully check

the shi ppi ng ca rton fo r dam age t hat may have o ccu rre d durin g shi ppi ng. If

the car ton a ppe ars to be d ama ged , carefull y ins pec t your un it fo r any

damag e and b e sur e all acc ess ori es necessa ry to o per ate the s yst em ha ve

arriv ed in tac t. In the e ven t dam age has been f oun d or pa rts are m iss ing ,

pleas e con tac t your de ale r for f urther ins tru cti ons.

INSTALLATION: Th ese a mplifier s are d esi gned to m oun t int o a

stand ard 1 9”r ack. The front pa nel p rov ides fo ur ho les u sed to screw t he un it

into a ra ck. T he un it al so provide s a way t o rea r mount t he un it in to a rack for

added s ecu rit y. Rea r mounting t he un it is e speci all y rec ommended i f the

unit is t o mou nte d into a mo bil e rac k.

INTRODUCTION

UNiKA PA-664/PA-1804

Important Precautions Introduction Front Panel Rear Panel Set Up Operating Modes Protection Specifications

FRONT PANEL

1. Rack M ounting Ea rs - Two fro nt pa nel mou nti ng hole s are provid ed on

each mo unting ear.

2. Rack H andle - PA Serie s amp lifie rs ar e desig ned with rac k handl e at

two eac h side. It's n ot only t o mak e the ent ire d esign e legant but m ore
pract ical and con venie nt fo r users .

3. Fan In let Grills a nd Filt er - PA Ser ies a mplif ier s are coo led by two rea r

mount ed fans. Coo l air fro m fro nt gril ls is f ilter ed and flows o ver the
heats inks and exh austs t o bac k side.
Make su re these out lets re mai n clear t o all ow unre stricted a ir flow.

4. AC P ower Switc h - PA Seri es ampl ifi ers hav e a fro nt-pa nel AC m ain s

power s witch.

5. Powe r Indicato r - This LE D wil l glow wh en ma ins pow er is applie d to

the uni t. Th is ligh t may c ontin ue to g low bri efly after m ains po wer h as
been tu rned off, th is is n ormal .

6. Chan nel 1-4 Sign al Indi cat or - This L ED in dicat es that a sign al (abo ve

a minim um thresho ld) is pr ese nt at the a mpl ifier i nput, and th at the
signa l is being amp lifie d.

7. Chan nel 1-4 Clip I ndica tor - T his LED w ill b egin to f lash when th e

chann el begins to o verlo ad (c lip), a t thi s point t he channel w ill beg in to
disto rt. Under he avy cli ppi ng acti vit y, lower the ch annel 's ga in cont rol t o
reduc e the risk of da mage to y our s peake rs an d ampli fier. This LE D may
glow wh en the unit ha s been tu rne d off , this is n ormal.

8. Chan nel 1-4 Gain C ontro l - Thi s rotar y kno b is used t o control th e

outpu t signal lev el of the c han nel. Tur nin g the kno b in clockwi se
direc tion will in creas e out put sig nal l evel.

9. UNiK A Logo and M odel No - PA Serie s hav e 2 types o f 2U mo dels PA-

664/PA-18 04.

pag e 3

Figure 1

UNiKA PA-664/PA-1804

Clip Clip Clip Clip

Signal Signal Signal Signal

POWER

CH 1

CH 2

CH 3

CH 4

Min Min M in MinMax Max Max Max

4Ch PO WER AMP

PA

UNiKA

1804

1

3

4

2

5 6 7 8 9

Important Precautions Introduction Rear Panel Set Up Operating Modes Protection Specifications Front Panel

10. Fan O utlet Port s - Dual 2- spe ed cool ing f ans. Co oling air en ters th e

ampli fier throu gh the fr ont g rills a nd ex haust s through th e fans. B e
sure no t to block the se port s whe n insta lli ng the am plifier or o ther
assoc iated equi pment . Air mu st flow u nim peded t hrough the se port s.

11. Chan nel 1-4 Bala nced 1/ 4" TR S & XLR Inp ut Co nnect ors - This is

the inp ut termina l of the au dio s ignal t hat c an be con nected to th e
balan ced 1/4” TRS a nd XL R input p lug s.
XLR pin s etting: Pi n-3/s ign al nega tiv e, Pin- 2/signal p ositi ve, P in­1/gro und;
TRS pin s etting: TI P/s ignal p osi tive, R ING/sign al nega tiv e,
SLEEV E/ground

12. Cha nnel 1-4 Out put Jac k / 5-Way Bi ndi ng Post - C onn ect eac h

speak er to channe l 1-4 out put t ermin al re spect ively. Red is p osi tive
signa l and Black is n egati ve si gnal.

13. Par allel Inpu t Switc h - Inp ut sign al of c hanne ls 1 and 2, 2 and 3, o r 3

and 4 in pa rallel mod e. When s wit ch “ON” , it' s “Para llel Mode” s tate,
other wise it's “S tereo M ode ” state w hen s witch “ OFF”.

14. Mon o Bridge Swi tch - Inp ut si gnal of c han nel 1 and 2 o r 3 and 4 in

bridg e mode. When s witch “ ON” , it's “B rid ge Mode ” state, oth erwis e
it's “S tereo Mode ” state w hen s witch “ OFF ”.

15. Cha nnel 3 Subwo ofer Mo de ON /OFF Sw itc h - This sw itc h will en able

the cha nnel 3 to be a sub woofe r cha nnel or b ypa ss the su bwoofer
funct ion.

16. Cha nnel 3 Frequ ency Adj . - This po t adj ust the f req uency l evel from

20Hz to 2 00Hz sent to y our spe ake r on chan nel 3 w hen usi ng your
ampli fier in subw oofer m ode .

17. Gro und Lift Swi tch - Thi s swi tch is us ed to d iscon nect the int ernal

groun d signal fro m the amp lif ier cha ssi s groun d. Th is may re duc e the
buzz th at is caused f rom an el ect rical 5 0Hz /60Hz c ycle.

18. Bre aker - This br eaker i s an AC pr otect ion c ircui t from short c ircui t.

Just pr ess the swit ch to res et it .

19. AC Power Inpu t - Plug th is ca ble in to a s tan dard 110 or 220 V wall

outle t. Be sure tha t suppl ied v oltag e mat ches th at of the requ ired
volta ge of your amp lifie r. Nev er plug y our a mplif ier in to a wall o utlet
that do es not match t he requ ire d volta ge of y our amp lifier, ser ious
damag e may occur to y our uni t.

REAR PANEL

pag e 4

Figure 2

UNiKA PA-664/PA-1804

CH4 & CH3 CH2 & CH1

CH 4 CH 3

INPUT

PARALLEL

INPUT

PARALLEL

BRIDGE BRIDGE

CH 1CH 2

CH-3

_

+

CH-4

_

+

+ +

__

BRIDGE

MONO

BRIDGE

MONO

CH-1

_

+

CH-2

_

+

AC IN

BREAKER

RESET

4 CHANNEL INPUT BALANC E

CAUTION

2 OHMS MINIMUM IMPEDANCE PER CHANNEL
4 OHMS MINIMUM IMPEDANCE IN MONO BRIDGE MODE

GROUND
LIFT

200Hz20Hz

~120VAC 60Hz

1500 WATTS

FREQUENCY

SUB WOOFER

ON / OFF

CH3 & CH2

PARALLEL

CH 4 CH 3

CH 2 CH 1

15

A

M

P

10

18

10

17 19

15161413 13 1413

12

11

Important Precautions Introduction Front Panel Set Up Operating Modes Protection Specifications Rear Panel

INPUTS - The PA Series ampl ifier a llo ws you to u se two types o f input conn ector s per c hanne l, a XL R femal e jack for bal anced c onn ectio ns

and a 1/4 ” TRS f emale j ack t hat wil l acc ept bal anced and un balan ced c onnec tor s. Use th ese connec tions t o con nect th e out put sig nal from a
mixer, c ross-ove r or EQ to yo ur PA Ser ies a mplif iers. A balanc ed conn ect ion is re com mende d for cable ru ns long er th an 20ft . Whe n const ructing
your ow n XLR cables f ollow t he pi n confi gur ation d escribed b elow fo r pro per con nections . For cable ru ns shor ter t han 20f t., y ou may ch oose the
1/4” TS unba lance d inp ut opti on. T he 1/ 4” TS unbala nced in put o ption m ay be m ore con venient fo r most users d ue to the a bun dant su pply of
prefa bricated c ables a vai lable a t you r local a udio de ale r.

BINDI NG POST/BA NANA PLU G: Conn ect y our spe akers to the b indin g pos t outpu ts on t he rear o f the amplif ier. The spea ker w ire may b e
conne cted by bare w ire (di rec tly con nec ted, us ually for pe rmane nt co nnect ion s), ban ana plug, or s pade co nne ctor. Co nne ction s are made to
chann el one and cha nnel tw o out puts fo r Ste reo Mod e or across th e red ter min als of ch ann el one an d channel tw o for Mon o Bri dge Mod e.

IMPOR TANT N OTICE: Alt hough a s pea ker wil l operate wi th the posit ive and n ega tive le ads plugge d into ei the r termi nal o n the amp lifier bin ding
post, b e sure to plug t he nega tiv e lead in to th e black t erminal an d posit ive l ead int o the r ed term inal. Ensu ring pr ope r polar ity w ill avo id speaker s
being o ut of phase th at can ca use a l oss of ba ss re spons e.

2 Hot (+data)

1

3

2

Male XLR Pin Configuration

Figure 3

1 Ground / Return / 0v

3 Negative (-data)

Balanced TRS 1/4” Plug

Hot (+)

Negative (-)

Ground/Shield

Figure 4

Unbalanced TS 1/4” Plug

Hot (+)

Negative (-)

Figure 5

pag e 5

SET UP

OUTPUTS -

UNiKA PA-664/PA-1804

Important Precautions Introduction Front Panel Rear Panel Operating Modes Protection Specifications Set Up

When co nnecting y our spe ake rs to the a mpl ifier u sing bare wi re, uns cre w the red a nd bl ack cap s on the

bindi ng post, be su re not to c omp letel y rem ove or un screw the re d and bla ck ca ps. Str ip ba ck the wi re

insul ation 1/2” ( 13mm) . Ins ert the b are w ire int o the hole tha t was rev eal ed by uns cre wing th e binding

post ca p. After inse rting t he wi re into t he bi nding p ost hole, sc rew the b ind ing pos t cap d own on th e wire.

To reduce t he risk of sho ck or dam age t o your am pli fier, be s ure that the w ire con nec ted to on e bin ding

post do es not come in c ontac t wit h that of a not her.

SPADE CONNE CTO R : (Figu re 8)

When co nnecting y our spe ake rs to the a mpl ifier u sing spade c onnec tor ; unscr ew th e red and b lack caps

on the bi nding post , be sure n ot to c omple tel y remov e or unscrew t he red an d bla ck caps . Ins ert the s pade

conne ctor into th e bindi ng po st and ti ght en the ca ps down on the s pade co nne ctor. To reduce t he risk of

shock o r damage to yo ur ampl ifi er, be sur e tha t the wir e connecte d to one bi ndi ng post d oes n ot come i n

conta ct with that o f anoth er.

MONO BR IDGE CONNE CTION S : (Fi gure 9)

Mono br idge opera tion co nne ction s will follo w the abo ve de scrip tio ns, how ever, when op erati ng in m ono

bridg e operatio n the spe ake r conne cti ons wil l run betwee n the two p osi tive (r ed) leads. U se channel t wo

posit ive output t ermin al fo r the neg ati ve conn ection and t he chan nel o ne posi tiv e outpu t terminal f or the

posit ive connec tion.

pag e 6

BARE WIRE CONNECTION : (Figure 7)

BANAN A PLUG : (Fi gure 6)

When co nnecting y our spe ake rs to the a mpl ifier u sing banan a plugs , be su re that t he re d and bla ck

caps on t he binding p ost are c omp letel y scr ewed in . Insert the b anana p lug s into th e cap s of the bi nding

post, b e sure that th e banan a plu gs are in ser ted sec urely to avo id the ri sk of p oppin g out .

UNiKA PA-664/PA-1804

Typical speaker output using bare wire.
Insert bare wire into the binding post and tighten.

Typical speaker output using spade connectors.
Insert bare wire into the binding post and tighten.

Figure 8

1/5 "
13m m

Figure 7

Figure 6

Figure 9

+

_

BRIDGE

MONO

CH-1

_

+

CH-2

_

+

CH 2 CH 1

Important Precautions Introduction Front Panel Rear Panel Operating Modes Protection Specifications Set Up

pag e 7

OPERATING MODES

STEREO OPERATION : Connect your inputs into channels one and two, also channels three and four of the amplifier. Connect your speakers to the outputs on

the rear of the amplifier. Be sure that your front gain controls are turned down to their lowest level (fully counterclockwise). Turn your amplifier on. Turn your input
source level up. Use your front gain controls to regulate the output volume. Be sure not to raise the volume to the clip level, however an intermittent clip signal is
acceptable.

MONO BRIDGE OPERATION : Be sure your amplifier and all other audio equipment are powered down. Press the Bridge button. Connect input signals to

channels one and two, or three and four. Connect your speaker across the red output binding post on the rear of your amplifier. Turn your equipment on (your amplifier
should always be the last item you turn on). Apply an input source signal to your amplifier. Use the channel one and three gain controls to regulate your amplifier output.

PARALLEL MONO : Parallel ties each two channel line inputs together, channels one and two, two and three or three and four, that they will be driven by the same

signal, without the need for external jumpers or wiring. Four amplifier channels will operate independently. Though they carry the same signal, their gain controls affect
only their respective channels, and they both must use their respected speaker outputs. Never attempt to parallel the speaker outputs, this may cause serious damage
to your amplifier! To run in parallel mono mode connect your system as you would if you were going to run in stereo mode. Then press the Parallel button. Be sure the
amplifier is off or the power is disconnected before making any changes.

SUBWOOFER MODE : This mode sends low frequencies to your speakers without the use of an external cross-over. The subwoofer operation can be operated in

mono only. Set the subwoofer mode switch of the channel three to the “ON” position. Use the frequency selector to adjust the subwoofer output frequency from 20Hz to
200Hz. In addition, the channel two and channel three “PARALLEL” switch sets these two channels in parallel mode, therefore when the “Subwoofer” switch is set to
ON, channel two will simultaneously operated as a subwoofer channel same as channel three.

ONE CHANNEL NORMAL / ONE CHANNEL SUBWOOFER (BI-AMP) - You may also use your amplifier to bi-amp your system. You may use one side of the amplifier
to power a subwoofer and the other side to power a full range speaker. Follow the set-up guides listed above to mix and match your operations.

UNiKA PA-664/PA-1804

Figure 10 Mono Bridge Mode Connection

MONO SUBWOOFER SPEAKER

SPEAKER IMPEDANCE MINIMUM 8 OHM

Set to Bridge

Negative (-) Lead

Positive (+) Lead

PA-1804 Rear Panel

Set to Bridge

MONO SUBWOOFER SPEAKER

SPEAKER IMPEDANCE MINIMUM 8 OHM

Negative (-) Lead

Positive (+) Lead

CH4 & CH3 CH2 & CH1

CH 4 CH 3

INPUT

PARALLEL

INPUT

PARALLEL

BRIDGE BRIDGE

CH 1CH 2

CH-3

_

+

CH-4

_

+

+ +

__

BRIDGE

MONO

BRIDGE

MONO

CH-1

_

+

CH-2

_

+

AC IN

BREAKER

RESET

4 CHANNEL INPUT BALANCE

CAUTION

2 OHMS MINIMUM IMPEDANCE PER CHANNEL
4 OHMS MINIMUM IMPEDANCE IN MONO BRIDGE MODE

GROUND
LIFT

200Hz20Hz

~120VAC 60Hz

1500 WATTS

FREQUENCY

SUB WOOFER

ON / OFF

CH3 & CH2

PARALLEL

CH 4 CH 3

CH 2 CH 1

15
A
M
P

Important Precautions Introduction Front Panel Rear Panel Set Up Protection Specifications Operating Modes

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UNiKA PA-664/PA-1804

PA-1804 Rear Panel

Negative (-) Lead

Positive (+) Lead

Negative (-) Lead

Positive (+) Lead

Negative (-) Lead

Positive (+) Lead

STEREO MODE FULL RANGE CONNECTION

SPEAKER IMPEDANCE MINIMUM 4 OHM

Set to Bridge

MONO BRIDGE MODE CONNECTION

SPEAKER IMPEDANCE MINIMUM 8 OHM

(Can be Set as A Sub woo fer C han nel )

Figure 11

CH4 & CH3 CH2 & CH1

CH 4 CH 3

INPUT

PARALLEL

INPUT

PARALLEL

BRIDGE BRIDGE

CH 1CH 2

CH-3

_

+

CH-4

_

+

+ +

__

BRIDGE

MONO

BRIDGE

MONO

CH-1

_

+

CH-2

_

+

AC IN

BREAKER

RESET

4 CHANNEL INPUT BALANCE

CAUTION

2 OHMS MINIMUM IMPEDANCE PER CHANNEL
4 OHMS MINIMUM IMPEDANCE IN MONO BRIDGE MODE

GROUND
LIFT

200Hz20Hz

~120VAC 60Hz

1500 WATTS

FREQUENCY

SUB WOOFER

ON / OFF

CH3 & CH2

PARALLEL

CH 4 CH 3

CH 2 CH 1

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STEREO MODE FULL RANGE CONNECTION

PARALLEL MODE FULL RANGE CONNECTION

SPEAKER IMPEDANCE MINIMUM 4 OHM

PA-1804 Rear Panel

Negative (-) Lead

Positive (+) Lead

Negative (-) Lead

Positive (+) Lead

SPEAKER IMPEDANCE MINIMUM 4 OHM

Set to Parallel

Negative (-) Lead

Positive (+) Lead

Negative (-) Lead

Positive (+) Lead

Figure 12

CH4 & CH3 CH2 & CH1

CH 4 CH 3

INPUT

PARALLEL

INPUT

PARALLEL

BRIDGE BRIDGE

CH 1CH 2

CH-3

_

+

CH-4

_

+

+ +

__

BRIDGE

MONO

BRIDGE

MONO

CH-1

_

+

CH-2

_

+

AC IN

BREAKER

RESET

4 CHANNEL INPUT BALANCE

CAUTION

2 OHMS MINIMUM IMPEDANCE PER CHANNEL
4 OHMS MINIMUM IMPEDANCE IN MONO BRIDGE MODE

GROUND
LIFT

200Hz20Hz

~120VAC 60Hz

1500 WATTS

FREQUENCY

SUB WOOFER

ON / OFF

CH3 & CH2

PARALLEL

CH 4 CH 3

CH 2 CH 1

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Important Precautions Introduction Front Panel Rear Panel Set Up Protection Specifications Operating Modes

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PROTECTION

1. SWITCH ON MUTE PROTECTION - The mute circuit is used at the inputs when the unit switched ON, output of between a few seconds the amplifier will

be muted. This is done so that turn-on/off noises from mixers and other gear is blocked in case the entire system is powered up at once.

2. SHORT CIRCUIT PROTECTION - The PA series comes with built-in Output Short Circuit Protects. The Output Short

Circuit Protection protects the output devices of the amplifier from short circuits and stressful loads. If your speaker lines
shorted, the amplifier automatically detects this problem and discontinued operation for that channel. If one side of your
amplifier becomes shorted and goes into protect mode, the other side will continue to operate normally. Channel output during
the “Short Circuit Protection" will be interrupted (i.e. no sound output). Short Circuit Protection can usually be traced back to the
signal output line (i.e. speaker line). Check the line from the output terminal of the amplifier to the speaker. If this line is good,
check the internal speaker connections and components. A short circuit will usually be traced to a bad cable or a bad speaker
component and is rarely traced to the amplifier itself.

UNiKA PA-664/PA-1804

3. OVERHEATING PROTECTION - The PA series amplifiers are cooled by two variable speed fans, and always are kept at moderate temperature. During

low level output the fans run at normal speeds. During high output and as heat raises, (exceeding 50°C.), the fans will run at higher speeds to aid the cooling
process. If the heatsink temperature exceeds 91°C., the amplifier will mute until the amplifier cools down. When the amplifier cools below 90°C., the amplifier will
return to normal operations. Be sure not to operate your amplifier below the minimum load ratings to reduce the risk of overheating problems.

4. DC CIRCUIT PROTECTION - If dangerous subsonic frequencies or direct current (DC) is detected in the amplifier's output, the unit will activate its DC/low-

frequency protection circuitry and the amplifier will be muted. This protects the loads and prevents oscillations. The unit will resume normal operation while the
amplifier no longer detects dangerous low-frequency or DC output.

Important Precautions Introduction Front Panel Rear Panel Set Up Operating Modes Specifications Protection

pag e 10

SPECIFICATIONS

UNiKA PA-664/PA-1804

Important Precautions Introduction Front Panel Rear Panel Set Up Operating Modes Protection Specifications

R.M.S. Output Power 4 Ch Driven

4ohms/8ohms

1KHz 1% THD

R.M.S. Output Power Bridged Mono

8ohms 1KHz 1% THD

Input Sensitivity

Frequency Response (20Hz~20KHz)

Total Harmonic Distortion

Crosstalk @ 1KHz

Damping Factor

Output Circuitry

Cooling System

Dimensions (H×W×D)

Weight

Rack Space

Power Consumption

@ Maximum Output Power 8ohms

Signal To Noise Ratio

below rated power 20Hz to 20kHz,

A-Weighted

4 Ch Driven

PA-664

4ohm s 170W

8ohm s 100W

1V

±0.2dB

<0.02%

>65dB

>240

508W

4.61A@110V

CLASS AB

Dual 2-Speed Fan

88 x 483 x 450 mm

15kg

2U

340W

>95dB

4 Ch Driven

PA-1804

4ohm s 340W

8ohm s 200W

680W

1V

±0.2dB

<0.02%

>65dB

>240

1016W

9.23A@110V

CLASS AB

Dual 2-Speed Fan

88 x 483 x 450 mm

17kg

2U

>95dB

Pro fes sio nal Po wer Am pli f ie rs

UNiKA