Kustom KPM8420 User Manual

OWNER'S MANUAL

KPM8420

Congratulations on the purchase of your new Kustom amp! Your new KPM8420
Powered mixer successfully draws on more than 30 years of amplifier design and
manufacturing experience at Kustom. This amp was planned from the ground up by
our engineers to offer top-notch tone and dependable performance. Inside this manual,
you'll find handy information about the amp's features. We wish you many years of
enjoyment with your Kustom KPM8420 Powered Mixer.

ENGLISH

Danger
Exposure to extremely high noise levels may cause a permanent hearing loss.
Individuals vary considerably to noise induced hearing loss but nearly everyone will
lose some hearing if exposed to sufficiently intense noise for a sufficient time.

The U.S. Government's Occupational Safety and Health Administration (OSHA) has
specified the following permissible noise level exposures:

DURATION PER DAY (HOURS) 8 6 4 3 2 1

SOUND LEVEL (dB) 90 93 95 97 100 103

According to OSHA, any exposure in the above permissible limits could
result in some hearing loss. Ear plugs or protectors in the ear canal or over
the ears must be worn when operating this amplification system in order to
prevent a permanent hearing loss. If exposure in excess of the limits as
put forth above, to insure against potentially harmful exposure to high
sound pressure levels, it is recommended that all persons exposed to
equipment capable of inducing high sound pressure levels, such as this
amplification system, be protected by hearing protectors while this unit is in
operation.

CAUTION

RISK OF ELECTRIC SHOCK

DO NOT OPEN

CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK, DO

AVIS: RISQUE DE CHOC ELECTRIQUE-NE PAS OUVRIR.

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.

THIS SYMBOL IS INTENDED TO ALERT THE USER TO THE PRESENCE OF
IMPORTANT OPERATING AND MAINTENANCE (SERVICING) INSTRUCTIONS
IN THE LITERATURE ACCOMPANYING THE UNIT.

NOT REMOVE CHASSIS. NO USER-SERVICEABLE
PARTS INSIDE. REFER SERVICING TO QUALIFIED
SERVICE PERSONNEL.

IMPORTANT SAFETY INSTRUCTIONS

1. Read all safety and operating instructions before using this product.

2. All safety and operating instructions should be kept for future
reference.

3. Read and understand all warnings listed on the operating
instructions.

4 . Follow all operating instructions to operate this product.

5. This product should not be used near water, i.e. Bathtub,
sink,swimming pool, wet basement, etc.

6. Only use dry cloth to clean this product.

7. Do not block any ventilation openings, It should not be placed flat
against a wall or placed in a built-in enclosure that will impede the
flow of cooling air.

8. Do not install this product near any heat sources ;such as,radiators,
heat registers, stove or other apparatus (including heat producing
amplifiers) that produce heat.

9. Do not defeat the safety purpose of the polarized or grounding-type
plug. A polarized plug has two blades with one wider than the 0ther.A
grounding-type plug has two blades and a third grounding prong. The
wide blade or the third prong are provided for your safety If the
provided plug does not fit into your outlet, consult an electrician for
replacement of the obsolete outlet.

10. Protect the power cord being walked on or pinched, particularly at
Plugs, convenience receptacles and the point where they exit from
the apparatus. Do not break the ground pin of the power supply cord.

11 . Only use attachments specified by the manufacturer.

12. Use only with the cart, stand, tripod, bracket, or table specified by the
manufacturer or sold with the apparatus. When a cart is used, use
caution when moving cart/apparatus combination to avoid injury from
tip-over.

13. Unplug this apparatus during lightning storms or when unused for
long periods of time.

14. Care should be taken so that objects do not fall and liquids are not
spilled into the unit through the ventilation ports or any other
openings.

15. Refer all servicing to qualified service personnel. Servicing is
required when the apparatus has been damaged in any way; such
as, power-supply cord or plug is damaged, liquid has been spilled or
objects have fallen into the apparatus, the apparatus has been
exposed to rain or moisture, does not operate normally or has been
dropped.

16. WARNING: To reduce the risk of fire or electric shock, do not expose
this apparatus to rain or moisture.

2

FRENCH

Danger
L‘exposition a des niveaux eleves de bruit peut provoquer une perte permanente
de l’audition, Chaque organisme humain reagit differemment quant a la perte de
l’audition, mais quasiment tout le monde subit une diminution de I’acuite auditive
lors d’une exposition suffisamment longue au bruit intense. Les autorites
competentes en reglementation de bruit ont defini les expositions tolerees aux
niveaux de bruits:

DURE EN HEURES PAR JOUR 8 6 4 3 2 1

INIVEAU SONORE CONTINU EN dB 90 93 95 97 100 103

Selon les autorites, toute exposition dans les limites citees ci-dessus, peuvent
provoquer certaines pertes d’audition. Des bouchons ou protections dans
l’appareil auditif ou sur l’oreille doivent etre portes lors de l’utilisation de ce
systeme d’amplification afin de prevenir le risque de perte permanente de
l’audition, Dans le cas d’expositions superieures aux limites precitees il est
recommande, afin de se premunir contre les expositions aux pressions
acoustiquese I evees potentielIement dangeure u ses, aux personnes exposees
aux equipements capables de delivrer de telles puissances, tels ce systeme
d’amplification en fonctionnement, de proteger l’appareil auditif.

ATTENTION

RISQUE DE CHOC ELECTRIQUE

NE PAS OUVRIR.

ATTENTION: AFIN DE LlMlTER LE RISQUE DE CHO ELECTR/QUE, NE

CE SYMBOLE A POUR BUT D'AVERTIR L'UTILISATEUR DE LA PRESENCE
DE VOLTAGE DANGEREUX NON-ISOLE A L'INTERIEUR DE CE PRODUIT QUI
PEUT ETRE DE PUISSANCE SUFFISAMMENT IMPORTANTE POUR
PROVOQUER UN CHOC ELECTRIQUE AUX PERSONNES.

CE SYMBOLE A POUR BUT D'AVERTIR L'UTILISATEUR DE LA PRESENCE
D'INSTRUCTIONS D'UTILISATION ET DE MAINTENANCE DANS LES
DOCUMENTS FOURNIS AVEC CE PRODUIT.

IMPORTANTES INSTRUCTIONS DE SECURITE

1. Lire avec attention toutes les recommandations et précautions

d'emploi avant d'utiliser ce produit.

2. Toutes les recommandations et précautions d'emploi doivent être

conservées afin de pouvoir s'y reporter si nécessaire.

3. Lire et comprendre tous les avertissements énumérés dans les

précautions d'emploi.

4. Suivre toutes les précautions d'emploi pour utiliser ce produit.

5. Ce produit ne doit pas être utilisé près d'eau, comme par

exemple baignoires, éviers, piscine, sous-sol humides ... Etc.

PAS ENLEVER LE CHASSIS. NE CONTIENT PAS DE
PIECES POUVANT ETRE REPAREE PAR L’UTILISATEUR.
CONFER LE SERVICE APRES-VENTE AUX
REPARATEURS

6. Utiliser exclusivement un chiffon sec pour nettoyer ce produit.

7. Ne bloquér aucune ouverture de ventilation. Ne pas placer le

produit tout contre un mur ou dans une enceinte fernée, cela

gênerait le flux d'air nécessaire au refroidissement.

8. Ne pas placer le produit près de toute source de chaeur telle que

radiateurs, arrivées d'air chaud, fourneaux ou autres appareils

générant de la chaleur (incluant les amplificateurs producteurs

de chaleur) .

9. Ne pas négliger la sécurité que procure un branchement polarisé

ou avec raccordement à la terre, Un branchement polarisé

comprend deux fiches dont l'une est plus large que l'autre. Un

branchement à la terre comprend deux fiches plus une troisième

reliée à la terre. Si la fiche secteur fournie ne s'insert pas dans

votre prise de courant. consulter un 'électricien afin de remplacer

votre prise obsolète.

10. Protéger le cordon d'alimentation de tout écrasement ou

pincement, particulièrement au niveau des fiches, des

réceptacles utilisés et à l'endroit de sortie de l'appareil. Ne pas

casser la fiche de terre du cordon d'alimentation.

11. Utiliser uniquement les accessoires spécifiés par le constructeur.

12. Utiliser uniquement avec le chariot de transport, le support, le

trépied, la console ou la table spécifiés par le constructeur ou

vendus avec l'appareil. Lors de l'utilisation d'un chariot, bouger

avec précaution l'ensemble chariotlappareil afin d'éviter les

dommages d'un renversement.

13 Débrancher cet appareil lors d'orages ou s'il n'est pas utilisé

pendant une longue période.

14. Des précautions doivent être prises afin qu'aucun objet ne tombe

et qu'aucun liquide ne se répande à l'intérieur de l'appareil par

les orifics de ventilation ou n'importe quelle autre ouverture.

15. Pour toutes interventions techniques s'adresser à un technicien

qualifié.L'intervention technique est nécessaire lorsque l'appareil

a été endommagé de n'importe quelle façon, comme par

exemple si le cordon secteur ou sa fiche sont détériorés,si du

liquide a coulé ou si des objets sont tombés à l'intérieur de

l'apparei1,si l'appareil a été exposé à la pluie ou à l'humidité, s'il

ne fonctionne pas normalement ou s'il est tombé.

16. ATTENTI0N:Pour réduire le risque d'incendie ou de choc

electrique ne pas exposer l'appareil à la pluie ou à l'humidité.

3

CHANNELS

Front and Rear Panel Layout

Effects 1

Effects 1

Effects 1

Effects 1

Effects 1

Effects 2

Effects 2

Effects 2

Effects 2

Effects 2

Treble

Treble

Treble

Treble

Treble

Mid

Mid

Mid

Mid

Mid

Bass

Bass

Bass

Bass

Bass

Monitor

Monitor

Monitor

Monitor

Monitor

Main

Main

Main

Main Main

Main

Pad Pad Pad Pad Pad Pad

Line/Mic Line/Mic Line/Mic Line/Mic Line/Mic

Line/MicLine/MicLine/Mic

Effects 1

Effects 2

Treble

Mid

Bass

Monitor

Main

Effects 1

Effects 2

Treble

Mid

Bass

Monitor

Main

Pad Line/

Inst

Effects 1

Effects 2

Treble

Mid

Bass

Monitor

Main

Pad Line/

Inst

DIGITAL

EFFECTS

Effects 1Monitor

Effects 1 Main

Small Room

Up

Large Room
Small Hall
Large Hall

Effects 1

Chorus
Chorus/Rev
Slapback

Down

Echo

Effects 2 Monitor

Effects 2 Main

Short Room

Up

Med Room
Small Hall
Med Hall

Effects 2

Chorus
Chorus/Rev
Chorus/Hall

Down

Short Delay

Effects

24-bit

DIGITAL

from CIRRUS LOGIC

Power

Phantom

On

Power On

Mute

Channels

On

MIXER

STATUS

Model KPM8420

200x2 Watt Powered Mixer

100 250 500

100 250 500

Effects 1

Insert

Monitor

1K 4K

Playback Volume

Main

1K 4K

Playback Volume

Effects 2

Insert

2K

2K

+12

+6

0

-6

-12

Feedback Notch

+12

+6

0

-6

-12

RR

RR

Feedback Notch

10K

Monitor Volume

10K

Main Volume

Footswitch

Mute/Effects

Limiter

+6
+3

Limiter

+6
+3

0

-5

-10

0

-5

-10

MONITOR

MASTER

MAIN

MASTER

FRONT PANEL

JACKS

CD/Tape

Left Right

Phantom

Power

Playback Subwoofer Output

Left

Record Output Light Control Output

Preamp

PATCH BAY

Monitor B

On

Right

Off

Power Amp
Assignment

Output

Main

Monitor

Main A

Main

Monitor

Power Amp

Input

POWER AMP

OUTPUT

SERIAL NUMBER

DESIGNED IN USA MADE IN CHINA

AC FUSE

FUSE: T8A / 250V
120V 60Hz 160W

CAUTION

CHASSIS SURFACE HOT

SUPERFICE DE CHASSIS CHAUDE

POWER

SPEAKERSA B

MODEL KPM8420

POWERED MIXER

POWER

CAUTION

RISK OF ELECTRIC SHOCK

ATTENTION

RISQUE DE CHOC ELECTRIQUE-NE PAS OUVRIR

AC

ON

OFF

DO NOT OPEN

4

CHANNELS

1 2

Line/Mic

Line/Mic

Pad

Pad Line/

Inst

3

LINE/MIC Input Jacks:

These are combination input jacks capable of
receiving a Male-XLR for Balanced inputs such as
microphones or a Male ¼” Plug for Line level and
Instrument level devices.

4

Main

5

Monitor

6

Bass

MID Control:

Adjusts the amount of mid-range frequencies of the
individual channels to the main output section.
(NOTE: This control does not affect the monitor
signal).

7

Mid

8 9

Treble

10

Effects 2

Effects 1

PAD Switch:

This switch attenuates the input signal by 12db in
the out position. Press in when more input signal
gain is needed. If the input sounds distorted, then
use the out position.

LINE/INSTRUMENT Buttons (Channels
7&8 Only):

When the button is out, the ¼” input is configured
to receive a standard Line level input such as a
High-Z microphone, keyboard, drum machine, etc.
When this button is pressed, the input is configured
to receive an input from an electric or acoustic
guitar. No additional preamps are necessary to
amplify acoustic guitars with pickups.

MAIN Volume Control:

Adjusts the volume of the individual channels to
the MAIN output section.

MONITOR Volume Control:

Adjusts the volume of the individual channels to
the MONITOR output section.

piezo

TREBLE Control:

Adjusts the amount of Treble or high frequencies
of the individual channels to the main output
section. (NOTE: This control does not affect the
monitor signal).

EFFECTS 2 Control:

This control adjusts the amount of signal sent to the
EFFECTS 2 master section. Note: This control is
post fader, meaning the Effects 2 control gets it's
signal from the MAIN volume control. The MAIN
volume control must be turned up to allow signal
to flow to the EFFECTS 2 Control.

EFFECTS 1 Control:

This control adjusts the amount of signal sent to the
EFFECTS 1 master section. Note: This control is
post fader, meaning the Effects 1 control gets it's
signal from the MAIN volume control. The MAIN
volume control must be turned up to allow signal
to flow to the EFFECTS 1 Control.

BASS Control:

Adjusts the amount of bass or low frequencies of
the individual channels to the main output section.
(NOTE: This control does not affect the monitor
signal).

5

DIGITAL EFFECTS

14

13

12

11

18

17

16

15

Effects 1Monitor

Effects 1 Main

Up

Effects 1

Down

Effects 2 Monitor

Effects 2 Main

Up

Effects 2

Down

EFFECTS 1

Small Room
Large Room
Small Hall
Large Hall
Chorus
Chorus/Rev
Slapback
Echo

EFFECTS 2

Short Room
Med Room
Small Hall
Med Hall

Chorus

Chorus/Rev
Chorus/Hall
Short Delay

EFFECTS 1 EFFECTS 2

EFFECTS 1 DOWN Button: EFFECTS 2 DOWN Button:

This button scrolls down through the Digital This button scrolls down through the Digital
Effects sounds. Pressing this button when the Effects sounds. Pressing this button when the
(Echo) effect is lit will result in resetting the (Short Delay) effect is lit will result in resetting the
selected sound to the top (Small Room). selected sound to the top (Short Room).

EFFECTS 2 UP Button:

EFFECTS 1 UP Button:

This button scrolls up through the Digital Effects
sounds. Pressing this button when the (Small
Room) effect is lit will result in resetting the
selected sound to the bottom (Echo).

EFFECTS 1 MAIN Control:

This controls the amount of Effects 1 that is sent to
the MAIN Master Section.

EFFECTS 1 MONITOR Control:

This controls the amount of Effects 1 that is sent to
the MONITOR Master Section.

This bottom scrolls up through the Digital Effects
sounds. Pressing this button when the (Short
Room) effect is lit will result in resetting the
selected sound to the bottom (Short Delay).

EFFECTS 2 MAIN Control:

This controls the amount of Effects 2 that is sent to
the MAIN Master Section.

EFFECTS 2 MONITOR Control:

This controls the amount of Effects 2 that is sent to
the MONITOR Master Section.

6

MAIN AND MONITOR MASTER

19

Monitor

+12

+6

0

-6

-12

100 250 500

Feedback Notch Playback Volume Monitor Volume

20

1K 4K

2K

21 22

10K

Limiter

+6
+3

0

-5

-10

24

23

+12

+6

0

-6

-12

100 250 500

Feedback Notch Playback Volume Main Volume

26

25

Main

1K 4K

2K

27

10K

28

Limiter

+6
+3

0

-5

-10

30

29

MONITOR MASTER MAIN MASTER

MONITOR MASTER GRAPHIC EQ: MAIN MASTER GRAPHIC EQ:

This set of slide controls adjusts specific This set of slide controls adjusts specific

frequencies in order to tailor the overall sound to frequencies in order to tailor the overall sound to
an acoustical environment or an intended sound. an acoustical environment or an intended sound.

FEEDBACK NOTCH (MONITOR): FEEDBACK NOTCH (MAIN):

This control is a narrow notch that can remove a This control is a narrow notch that can remove a

problem frequency that may causing excessive problem frequency that may causing excessive
feedback. To activate this feature, slowly turn the feedback. To activate this feature, slowly turn the
control to find the feedback problem area. This control to find the feedback problem area. This
subtlety turns down a small area of frequencies, subtlety turns down a small area of frequencies,
thus removing the feedback without greatly thus removing the feedback without greatly
affecting the overall sound. Turning this knob full affecting the overall sound. Turning this knob full
counter-clockwise will defeat the feedback filter. counter-clockwise will defeat the feedback filter.

PLAYBACK VOLUME (MONITOR): PLAYBACK VOLUME (MAIN):

This control adjusts the amount of input from the This control adjusts the amount of input from the

Playback input jacks (Rear Panel). This set of Playback input jacks (Rear Panel). This set of
Stereo RCA jack will accept any Line-Level audio Stereo RCA jack will accept any Line-Level audio
sources such as: CD, MP-3, DVD, HARD DISC & sources such as: CD, MP-3, DVD, HARD DISC &
TAPE PLAYER. NOTE: This controls passes TAPE PLAYER. NOTE: This controls passes
signal directly to the MONITOR Master section signal directly to the MONITOR Master section
and is not affected by the Channels ON/MUTE and is not affected by the Channels ON/MUTE
function. function.

MONITOR MASTER Control: MAIN MASTER Control:

This control adjusts the master volume of the This control adjusts the master volume of the Main

Monitor section. section.

MONITOR LED METER: MAIN LED METER:

This indicates the level of Monitor Preamp output. This indicates the level of Main Preamp output.

The number values are in dBV (1VRMS = 0dBV). The number values are in dBV (1VRMS = 0dBV).

LIMITER LED: LIMITER LED:
This indicates Power Amp A has reached full This indicates Power Amp B has reached full clean

clean output. If the input signal to the power amp output. If the input signal to the power amp
increases after the LED is lit, it will be limited to increases after the LED is lit, it will be limited to
protect the speakers. Because this limiter is built protect the speakers. Because this limiter is built
into Power Amp A, the LED only shows that the into Power Amp B, the LED only indicates the
monitors are at full output when assigned to it (See Mains are at full output when assigned to it (See
page 9 for information on assigning power amps). page 9 for information on assigning power amps).

7

MIXER STATUS AND FRONT PANEL JACKS

37 35 36

Main Volume

Footswitch

Mute/Effects

31

32

from CIRRUS LOGIC

Power

Channels

On

On

Phantom

Power On

Mute

33

34

Effects 1

Insert

Effects 2

Insert

MIXER STATUS FRONT PANEL JACKS

POWER ON LED: EFFECTS 1 INSERT Jack:

When lit, power is being delivered to the mixer. This ¼” STEREO jack allows an external effect to

CHANNELS ON LED:

When lit, the channels will deliver signal to the
master sections.

PHANTOM POWER LED:

When lit, this LED indicates that Phantom power
is being delivered to the XLR jacks.

MUTE Button:

When pressed, this button will MUTE the input
channels. This switch is defeated when the
footswitch jack is used. NOTE: Playback inputs
will still function when channel mute is on.

be used with your KPM8420. TIP = Effects Send.
Ring = Effects Return.

EFFECTS 2 INSERT Jack:

This ¼” STEREO jack allows an external effect to
be used with your KPM8420. TIP = Effects Send.
Ring = Effects Return.

FOOTSWITCH (MUTE/EFFECTS):

This ¼” Stereo jack accesses the Channel Mute
and Effects On/Off Functions. TIP = Effects
Mute. RING = Channel Mute. Suggested
footswitch = Kustom KAC FS202

8

PATCH BAY

38

39

40

43

44

CD/Tape

Left Right

Playback Subwoofer Output

Left

Record Output Light Control Output

Preamp

Output

Main A

Monitor B

Right

Phantom

Power

On

Off

Power Amp

Assignment

Main

Monitor

Main

Monitor

Power Amp

Input

41

42

47

48

45

CD / TAPE PLAYBACK Jacks: PREAMP OUTPUT MONITOR:

46

These RCA jacks are used to play audio from CD, This ¼” Mono jack delivers a line level output
Tape, Computer, DVD, Hard Disc, MP-3 or other from the MONITOR Master section.
line level audio source. NOTE: Use the
PLAYBACK controls (#20 & #24) to adjust the
volume of the playback to the Main and Monitor
sections.

CD / TAPE RECORD OUTPUT Jacks:

These RCA jacks deliver a MONO Line level
output to a recording device such as Tape

POWER AMP ASSIGN A Switch:

This switch determines which master section will
drive the A power-amp. Place the switch in the UP
position to have the MAIN mix signal to the A
power-amplifier. Place the switch in the down
position to have the MONITOR mix signal to the A
power-amplifier.

Recorder, Computer, Recordable DVD, Hard Disc,

POWER AMP ASSIGN B Switch:

MP-3 and more.

This switch determines which master section will

PHANTOM ON/OFF Switch:

This switch turns on the phantom power to the
XLR input Jacks. This power supply is designed
to provide power for condenser microphones and
other devices.

SUB WOOFER OUTPUT Jack:

This is a low pass sub woofer output. Crossover
point = 150 hz @ 12db/oct.

LIGHT CONTROLLER OUTPUT Jack:

This is selective band-pass output designed to
deliver a Line level audio trigger signal to Lighting
Controller devices.

PREAMP OUTPUT MAIN:

This ¼” Mono jack delivers a Line level output
from the MAIN Master section.

40V

drive the B power-amp. Place the switch in the UP
position to have the MAIN mix signal to the B
power-amplifier. Place the switch in the down
position to have the MONITOR mix signal to the
B power-amplifier.

POWER AMP INPUT A:

This ¼” Mono jack allows the A power-amplifiers
to be used with an external Line level input.
NOTE: When used, this jack will interrupt the
signal flow from the mixer section of the
KPM8420.

POWER AMP INPUT B:

This ¼” Mono jack allows the B power-amplifiers
to be used with an external Line level input.
NOTE: When used, this jack will interrupt the
signal flow from the mixer section of the
KPM8420.

9

POWER AMP OUTPUTS, AC POWER

52

53

49

AC FUSE

FUSE: T8A / 250V

120V 60Hz 160W

SPEAKERSA B

MODEL KPM8420

POWERED MIXER

POWER

50

ON

51

OFF

POWER AMP OUTPUT AC POWER

POWER ON / OFF Switch:

SPEAKERS A:

These two ¼” jacks deliver the power from the A
power-amp to the speakers.

SPEAKERS B:

These two ¼” jacks deliver the power from the B
power-amp to the speakers.

MINIMUM LOAD (Impedance) Per Channel:
4 OHMS

POWER RATING Per Channel:

200 Watts@4 ohms, 125 Watts@8 ohms. Both
amps driven to 100%

Caution: Use speakers rated at 125 Watts @ 8

ohms or higher. Severe damage to the speakers is
possible if too low of wattage speaker is used.

The KPM8420 is ON when the switch is in the UP
position. Press the switch to the DOWN position to
turn the KPM8420 off. Always remove the AC
plug from the wall when not in use.

AC Power Cord Receptacle:

Insert the AC cord (Provided) firmly into the AC
connector. NOTE: Replace the AC power cord if
protective jacket is damaged or ground pin is
damaged or removed.

FUSE:

The fuse is located in a housing just below the
receptacle. Replace only with same type and size.
To remove the fuse, pull the tab located above the
fuse symbol away from the fuse housing.

10

FAQ Frequently Asked Questions:

1. How many speakers can I use with the KPM8420? 6. Can I use another non-powered mixer with my

ANSWER: Most speaker cabinets today are 8-ohms. KPM8420 to get more channels?
For the sake of this question we will assume this is ANSWER: YES! Take the Line level output of the
the case. You can use a total of four 8-ohm speakers external non-powered mixer and connect to one of
with the KPM8420: Two for the A power-amp and

two for the B power-amp . DO NOT plug all four
speakers into one power-amp.

2. Can I use two different effects on my vocal mics?

ANSWER: Yes! One popular setting for vocal mics is
to use one digital effects section for reverb and the
other effects section for delay. Here is an example:
Set Effects 1 to ECHO and Effects 2 to SMALL
HALL. Adjust the amount of reverb first by turning
up the EFFECTS 2 control on the desired individual
channel. Then, add the desired amount of ECHO by
turning up the EFFECTS 1 control on the same
individual channel. Set levels to obtain the desired
effect.

3. Can I use one effects section for my vocals and the
other for my instruments?

ANSWER: Yes! This is one of the truly unique
features of the KPM8420. Here is an example: a
little Chorus on an instrument can really sweeten the
sound, but chorus effects on vocals are a disaster.
First set up the Instrument channels: Set the sound
of EFFECTS 2 to Chorus or Chorus/Rev in the
master section of the mixer. Turn up the EFFECTS 2
send on the individual instrument channels to the
desired level. Now the vocal channels: Set the
sound of EFFECTS 1 to one of the reverb selections.
Turn up the EFFECTS 1 send on the individual vocal
channels to the desired level.

4. Can I use a sub-woofer without using the fixed
crossover from the KPM8420?

ANSWER: Yes! Use the MAIN preamp output jack
to feed a full range main signal to your sub-woofer
or active crossover and power-amp.

5. Can I use both Power-amps for mains or
monitors?

ANSWER: Yes! To use both power-amps for mains,
set the POWER AMP ASSIGNMENT switches &

to the UP (MAIN) position. To use both power­amps for monitors, set the POWER AMP
ASSIGNMENT switches (#41*) to the DOWN
(MONITOR) position.

the LINE ¼” inputs . Make sure the pad switch
is NOT pressed in. Set the individual channel tone
control to the twelve o'clock position and bring up
the channel volume control as needed.

7. Can I use an external Power-amp with my
KPM8420?

ANSWER: Yes! For MAIN Master feed, connect a
shielded high-Z instrument cable from the Preamp
output MAIN jack to the Line level input of the
desired external power-amp.

8. Not all of my microphones are condenser type.
Will using the Phantom Power in the KPM8420
damage my non-condenser mics?

ANSWER: No. You can safely use a combination of
condenser and dynamic microphones at the same
time.

9. I have the Digital Effects Control knobs on
Channel and Monitor turned up but still do not
hear any effects through the monitors. Why?

ANSWER: The Main volume on the channel is not
turned up . Because the effects send from the
channels is Post Main, there must be signal present
at that channels main output.

9. I have a channel that I want in the Mains but not
in the monitors. The Monitor Volume on the
channel is all the way down but still comes
through the monitors. Where is this coming from?

ANSWER: It is coming from one or both of the
Digital Effect Monitor controls & along with
one or both of the channel Effect controls &
being turned up. Fix the problem by turning down
Effect 1 or 2 on the channel, or Effect 1
Monitor or Effect 2 Monitor on the digital
effect.

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KPM8420

Model KPM8420 8 Channel Dual Powered Mixer

200W per channel 4 Ohms @ 5% THD
180W per channel 4 Ohms @ 0.4% THD

-115dB Mic Input, Rs=150 ohm, 20-20kHz

-55dB Residual Noise, all level controls 0% (minimum)

-45dB Nominal System Noise, all level controls at 50%

90 dB Mic to Power Amp (Ch 1 - Ch8) Pad Off
77dB Mic to Power Amp (Ch 1 - Ch8) Pad On
72dB Line to Power Amp (Ch 1 - Ch8) Pad Off
60dB Line to Power Amp (Ch 1 - Ch8) Pad On
36dB Playback to Power Amp
50dB Mic to Main out, Pad On
50dB Mic to Monitor out, Pad On
50dB Mic to Record out, Pad On

Crosstalk

70dB Channel to Channel, 1kHz

Input Channel Equalization

Master Equalization

Phantom Power +40V Applied to all Mic inputs when active

USA/Canada 120VAC/60Hz, 300W nominal
Europe 230VAC/50Hz, 300W nominal
UK 230VAC/50Hz, 300W nominal
Australia 240VAC/50Hz, 300W nominal
Japan 100VAC/50-60Hz, 300W nominal
mm/kg 292 (Height) x 495 (Width) x 305 (Depth), 15.6kg
Inches/Pounds 11.5 (Height) x 19 (Width) x 12.1 (Depth), 34.4 lbs

Recommended: KUSTOM model KAC-FS-202 (dual switch with LEDs)

Small room, Large room, small hall, large hall, chorus, chorus reverb, slapback, echo

Module 2:

Short room, Med room, small hall, Med hall, chorus, chorus reverb, chorus hall, short delay

Digital effects On/Off and Channel ON/OFF (playback remains active)

Special curve that adjusts Bass, Mid, and Treble frequencies
100 to 10kHz, 7 Band, 1 Octave Graphic, all ±12dB

Module 1:

Two 24 bit DSP modules, 8 effects per module.

Total Harmonic Distortion

Frequency Response 20HZ-20kHz

Actual response is tailored to speaker cabinet for
accurate acoustical response.

Less than 0.4%

Measured at 1VRMS (0dBv) at record output, effects
send, preamp output, or Main output.

System Gain

Dimensions

Power Requirements

All Measurements made at 1kHz

Digital Effects

Output Power

Hum & Noise

Footswitch

Specifications

12

Output

Record

A

Main

Output

Monitor

Output

Output

Speaker

B

Speaker

Sub Woofer

Playback

Input

Insert

Effects 1

Monitor

Effects 1

Main

Effects 1

Small Hall

Large Room

Large Hall

DIGITAL

EFFECTS 1

Chorus

Slapback

Chorus/Rev

Insert

Effects 2

Monitor

LED Meter

Monitor

Playback

K

10

Monitor

Effects 2

Small Room

Echo

Main

Effects 2

Med Room

Small Hall

Short Room

Med Hall

DIGITAL

EFFECTS 2

Chorus

Short Delay

Chorus/Hall

Chorus/Rev

0

10

~1k zH

0

2

Monitor

Master

B

Power Amp

Assignment

A

Power Amp

Assignment

Main

LED Meter

MIX

AMP

Main

Playback

10K

EQ

100

k zH

1

20~

NOTCH

Main

Master

LPF

Fault

Speaker

Protection

Monitor

LIMITER

Sensor

AMP A

POWER

LIMITER
POWER

LIMITER

Speaker

Protection

Main

Fault

Sensor

AMP B

POWER

LIMITER

POWER

EQ

Output

NOTCH

Light Controller

BPF

A Input

Power Amp

B Input

Power Amp

MONITOR BUSS

ON/OFF

Channels

Effects

ON/OFF

Phantom Power

EFFECTS 1

EFFECTS 1

MAIN BUSS

EFFECTS BUSS 2

EFFECTS BUSS 1

+40V

EFFECTS 2

Volume

MAIN

Volume

MONITOR

TREBLE

MID

TONE

CIRCUIT

BASS

PAD

Switch

MIC

PRE

Phantom Power

CHANNEL 1 - 6

LINE/MIC

Input Jack

Microphone

Line

EFFECTS 2

Volume

MAIN

Volume

MONITOR

TREBLE

MID

BASS

PAD

Phantom Power

TONE

CIRCUIT

Switch

MIC

PRE

Switch

LINE/INST

TIP

RING

Footswitch

Mute/Effects

CHANNEL 7 - 8

LINE/MIC

Input Jack

Microphone

Line

SIGNAL FLOW DIAGRAM

EC Declaration of Conformity

We: Kustom Musical Amplification Inc.

4940 Delhi Pike
Cincinnati, OH 45238
Tel: [phone] Fax: [phone]

Declare that the product

Product name: Kustom

Product model number: KPM8420

to which this declaration relates is in conformity with the following standards;

EN55013 (A12) : 1995 Limits and methods of measurement of radio disturbance characteristics of broadcast receivers and

associated equipment.

EN55020: 1995 Electromagnetic immunity of broadcast receivers and associated equipment.

EN61000-3-2: 1995 Limits for harmonic current emissions (equipment input current < 16A per phase).

EN61000-3-3: 1995 Limitation of voltage fluctuations and flicker in low voltage supply systems for equipment with rated

currents < 16A.

EN55103-1: 1995 Electromagnetic Compatibility - Product family standard for Audio, Video Audio-visual and

entertainment Lighting Control Apparatus.

EN60065: 1994 Safety requirements for main operated electronic and related apparatus for household and similar

general use.

Following the provisions of EU Council Directive(s): 72/73 EEC and 89/336/EEC.

We the undersigned, hereby declare that the equipment specified above conforms to the aforementioned directive(s).

Name of authorized person: Rick Kukulies, VP Engineering

Signature:______________________ Date: 05 June 2001

Kustom Musical Amplification Inc. (BC Rich)
4940 Delhi Pike
Cincinnati, OH 45238
Tel: [phone] Fax: [phone]

14

Kustom Inc., 4940 Delhi Pike, Cincinnati, OH • USA
[phone] Fax: [phone] / www.kustom.com