Galaxy audio Core pa8x140 User manual

OWNER’S MANUAL

1999GalaxyAudio,Inc.

GALAXY AUDIO

™

CORE PA8X140

This symbol indicates that there are important operating and maintenance instructions in the literature

accompanyingthisunit.

This symbol indicates that a dangerous voltage constituting a risk of electric shock is present within this unit.

WARNING! TOPREVENTTHERISKOFFIREORELECTRICSHOCK,DONOTEXPOSETHISAPPLIANCETO

RAINORMOISTURE.TOPREVENT THERISKOF ELECTRICALSHOCK,DONOTREMOVECOVER. NOUSER

SERVICEABLEPARTSINSIDE.REFERSERVICINGTOQUALIFIEDSERVICEPERSONNEL.

GENERAL GUIDELINES FOR OPERATING THE CORE PA8X140

DO NOT . . .

nExposethe COREPA8X140 torain ormoisture.

nPlug-in or unplug patch cords while the power is on.

nAttempt to make any repairs to the CORE PA8X140.

DO . . .

nHandlewithcare.

nReadthismanual.

nCompletetheregistrationcard.

CORE PA8X140 FRONT PANEL ------------------------------------------------------------------------------- 2

APPLICATIONS ------------------------------------------------------------------------------------------------------ 3

WIRELESS MICROPHONE CONNECTION------------------------------------------------------------------ 3

SOUND REINFORCEMENT BASICS-------------------------------------------------------------------------- 4

Avoiding Feedback -------------------------------------------------------------------------------------------- 4

Monitor Placement --------------------------------------------------------------------------------------------- 4

MaximizingGain ------------------------------------------------------------------------------------------------ 5

CORE PA8X140 SPECIFICATIONS---------------------------------------------------------------------------- 6

WARRANTY----------------------------------------------------------------------------------------------------------- 7

BLOCK DIAGRAM--------------------------------------------------------------------------------------------------- 9

TABLE OF CONTENTS

FRONT PFRONT P

FRONT PANELANEL

ANELANEL

ANEL

CORE PA8X140

LIMITLED

Indicates when the built-in compression circuit is activated. By

automatically reducing gain before clipping occurs the compression

circuit

prevents distortion. The

LIMIT

LED remains lit about half the

time when the amplifier is being driven to its maximum potential. Do

not allow it to remain lit more than half the time.

MIC(XLR)INPUT

Balanced input with 24 VDC phantom

power for electret microphones.

TONECONTROLS

When all three controls are set to the

12 o’clock (detent) position, the

output frequency response is flat.

HIGH +/- 12dB peak/dip at 16 kHz.

MID +/- 12dB peak/dip at 2 kHz,

LOW +/- 15dB peak/dip at 100 Hz

¼”INPUT

LEVELCONTROLS

SmartALIC

(All Level Input Control) adjusts the gain for differences between line

and mic signals. This allows almost any input signal to be used while maximiz-

ing the signal-to-noise ratio at the desired output level.

LINE LEVEL (7 o’clock to 12 o’clock) for tape decks, CD players. etc..

MIC LEVEL (12 o’clock to 5 o’clock) for mics and instruments.

POWERSWITCH

LEVELCONTROLFOR¼”INPUT

LEVELCONTROLFORMIC(XLR)INPUT

POWERLED

APPLICAPPLIC

APPLICAA

ATIONSTIONS

TIONSTIONS

TIONS

SmartALIC all level gain control compensates for differences between the input levels of microphones, instruments and

other devices. It enables the CORE PA8X140 to function equally well as a monitor, guitar amp, one-piece PA system, or

keyboardamp. Balanced XLR and ¼-inch TRSinputs havetheir ownlevel controls. Simplyplug into the appropriate jack

andposition thePA8X140 foryour particularapplication.

STAGEMONITOR

nSmallfootprintandcompactsizemakethePA8X140anunobtrusiveon-stagecompanion

nGalaxy’sproprietaryfive-inchdriver,mountedinthePA8X140’stiltablehead,providessuperior

intelligibilityofthe humanvoice,whetherspeaking orsinging

GUITARAMPLIFIER

nFive-inchdriverprovidessuperfastattack

nHead tilts to optimize directivity of mid and high frequencies

n146 watts of power and 98 dB sensitivity combine to achieve 114 dB SPL (very loud)

nBuilt-in compressor/limiter maximizes sustain

FULLYPORTABLEWIRELESSPASYSTEM(WithGalaxyAudio’sFAROUTLET)

n12Vpowersupplyforwirelessreceiver

nGalaxy’sproprietaryfive-inchdriver,mountedinthePA8X140’stiltablehead,providessuperior

intelligibilityofthe humanvoice,whetherspeaking orsinging

nCoverscrowdsof1,500ormore

nClassHampmeansFAROUTLET retainscharge longer

nHead tilts to optimize directivity of mid and high frequencies

KEYBOARDAMPLIFIER

nSpeciallydesignedacousticsuspensionchamberwith eight inchwoofer handlesfrequencies

down to 20 Hz unlike conventional bass reflex (ported) speakers which can distort synthesizers’

lowernotes.

nAcoustic suspension design produces nice “tight”sound

nHead tilts to optimize directivity of mid and high frequencies

WIRELESS MICROPHONE CONNECTIONWIRELESS MICROPHONE CONNECTION

WIRELESS MICROPHONE CONNECTION

It is not necessary to remove the head to connect a

wireless receiver. This exploded view is provided for

clarity. The mic cable may be routed under the head.

Velcro not included.

SOUND REINFORCEMENT BASICSSOUND REINFORCEMENT BASICS

SOUND REINFORCEMENT BASICS

AVOIDING FEEDBACK

Feedback

(the shriek sometimes emitted by sound systems) occurs when the microphone (or pickup) and speaker are posi-

tioned too close together for a given level of volume. Once feedback occurs, it will continue until either the volume is de-

creased or the microphone or speaker is moved.

Gain

is the degree to which the volume may be turned up before feed-

back begins. In setting up a sound system, the object is to maximize the gain.

nIn most cases, the (main) speakers should be placed on stands, at a height slightly above the heads of the

audience, in front and to each side of the stage.

nThey should be rotated inward, but only slightly. More than a few degrees of rotation can reduce the gain.

nPowering monitor speakers with the same channel of the amplifier used to power main speakers may cause

feedback.

nIdeally, monitor speakers should either have their own volume controls or be routed through a separate channel of the

amplifier so the volume of one speaker system can be adjusted without affecting the other.

nMost mixers provide separate controls for the mains and monitors. Separate monitor outputs make it possible to tailor

the monitor mix and the levels, independent of the mains.

nThePA8X140’stonecontrolsprovideonemeansofcontrollingfeedback. Begin with the MID and HIGH controls

set at 12 o’clock, and LOW at 10 o’clock. Gradually increase the volume until it reaches the point immediately before

feedback (the speaker should ring slightly). Turn the MID control to 10 o’clock. If the ringing stops, leave the MID

control in that position. If the ringing persists, return the MID control to 12 o’clock. Turn the HIGH control to 10

o’clock. If the ringing stops, leave the HIGH control in that position. If it persists, return the HIGH control to 12 o’clock

and repeat the process, turning the MID and HIGH controls to 9 o’clock and the LOW control to 7 o’clock. Periodically

talk through the system, while repeating this process, until several notes ringing at once or sound quality is noticeably

reduced.

nIn high volume applications, reduce all the LOW frequencies. Low frequencies are

omnidirectional

and can be heard

equally well anywhere on stage. They are not needed in the monitor mix.

nTheCORE PA8X140automaticallyprovidesaflatfrequencyresponsewheneverthetonecontrolsaresettotheir

center-detentpositions.

nUsea

unidirectional

microphone. Sincethereare manybrands, withwidevariance intheir amounts ofrejection (the

abilityto

not

pick up peripheral sounds), experimentation provides the best means of choosing the right microphone.

MONITOR PLACEMENT

nThe CORE PA8X140 should be positioned as near to the performer as is practical. The closer it is, the louder it is.

nTheCOREPA8X140shouldbe placedtotherearofthe microphonebeing usedbytheperformer.

nIf, in a system with multiple monitors, one monitor is substantially nearer a vocal microphone than are the other

monitors in the system, its volume may need to be reduced to avoid limiting the gain of the entire monitor system.

Figure 1.1

MAXIMIZINGGAIN

Figure 1.1

represents the worst possible case of gain limiting; the microphone is pointed directly at the speaker. Any in-

crease in volume will instantly produce feedback. As little as 1/1000 of the amplifier’s power may be available; with a 100 watt

amplifier, that’s only 1/10 of a watt. In

Figure 1.2

, the distance between the microphone and the speaker has increased to 500

feet, allowing 100 percent gain (all 100 watts of power may be utilized without producing feedback). Of course, these are ex-

tremes, but they illustrate the importance of speaker and microphone placement in determining the gain of the system. In

most cases it’s not possible to locate the microphone 500 feet from the speakers. The challenge is to position the speakers

toadequately cover the listening areawhile positioningthe microphoneto maximizethe gain.

Figure1.2

500Feet

AMPLIFIERSECTION

Power Output: 146 watts @ 4 ohms

Distortion: <0.1% THD @ 4 ohms

Minimum Recommended Load Impedance: 4 ohms

Frequency response: 40 Hz–20 kHz

Equalization: Three band center detent

Lo: ± 15 dB peak/dip at 100 Hz

Mid: ± 12 dB peak/dip at 2 kHz

Hi: ± 12 dB peak/dip at 16 kHz

Input connections (each with individual volume control)

One ¼-inch, balanced (18 k ohms differential,

9 k ohms unbalanced)

One XLR, balanced, with +24 VDC phantom power

(2.6 k ohms differential)

Output connections:

One (post-EQ, post-level) RCA line out

One (5.5 mm O.D./2.1 mm I.D.) barrel 12VDC @ 500 mA with

12”cable attached (for wireless receiver)

Damping Factor: >380

SPEAKERSECTION

Speaker Complement: One Galaxy Audio S5C160-8 ferro fluid cooled

5-inch driver with 40 oz. (1.1kg) magnet structure;

One 8-inch woofer, with 96 oz. (2.7kg) magnet structure, 2 inch voice coil

Nominal impedance: 4 ohms

Power handling capacity: 150 watts @ 4 ohms

Sensitivity (1 Watt @ 1 meter): 98 dB (1 kHz octave band)

Frequency response: 40 Hz–18 kHz

Maximum SPL @ clip (100 Watts @ 1 meter): 114 dB

SPLOWT: 4.07 (SPL ÷weight)

Enclosure Materials: Wood composite cabinet with polyurea finish and

cloth covered Noryl grille

Color: Black cabinet and grille

Dimensions: 20.6" x 12" x 9" (523 mm x 305 mm x 229 mm)

Net weight: 28 lbs. (12.7 kg)

Shipping weight: 31 lbs. (6.1 kg)

SPECIFICSPECIFIC

SPECIFICAA

ATIONSTIONS

TIONSTIONS

TIONS

BUILT-INCOMPRESSOR/LIMITER

Built-in compressor/limiter circuitry controls

the amplifier’s gain, acting like a compressor

on transient signals and a “brick wall”limiter

on signals that continuously exceed a prede-

termined limit. The result is an apparent 6 dB

increase in SPL without distortion.

CLASSHAMPLIFIER

TheClass Hpower supply configuration

utilizesfour output transistors, a lowvoltage

pairand ahigh voltagepair. The lowvoltage

transistors are active with any signal. When

demandon theamp exceedsthe lowvoltage

transistors’capabilities,the highvoltage

transistorskick inand provideadditional

power. The result isan amplifierthat runs

cooler, weighs less, is smaller and more

efficient.

POLYUREAFINISH

TheCORE PA8X140is covered witha tex-

tured black polyurea finish. An extremely

toughseamless membrane,polyurea—in

additionto beingabrasion, chemical,and

waterresistant—is airtight andprovides

sounddeadening. It ismanufactured without

theuse ofsolvents andis environmentally

friendly.

CAUTION:Thisproductiscapableofproducingsoundpressurelevelswhichmaycausepermanenthearingdamageafter

prolongedexposure.

THREE YEAR LIMITED WTHREE YEAR LIMITED W

THREE YEAR LIMITED WARRARR

ARRARR

ARRANTYANTY

ANTYANTY

ANTY

This warranty gives you specific legal rights, and you may also have other rights which may vary from state to state.

This warranty is extended to the purchaser and to any purchaser from him for value.

GALAXY AUDIO warrants the materials and workmanship of its products for a period of three full years from the date of the original purchase.

The following are not covered by the warranty:

1. Damage to or deterioration of the exterior cabinet which occurs after delivery.

2. Damage after initial delivery resulting from accident, misuse or neglect.

3. Damage resulting from failure to follow instructions contained in the owner’s manual.

4. Damage resulting from the performance of repairs by someone other than GALAXY AUDIO or an authorized GALAXY AUDIO service center.

5. Damage occurring during the shipment or delivery of any GALAXY AUDIO product to GALAXY AUDIO or an authorized service center after initial delivery of the product to you.

6. Damage to any GALAXY AUDIO product which has been altered, or on which the serial number has been effaced or removed.

If your unit requires service, it must be returned, shipping charges prepaid to an authorized GALAXY AUDIO service center in the United States. (This warranty is not enforceable outside the U.S.) If you are not able to

locate an authorized service center in your area, please call or write GALAXY AUDIO, 601 E. Pawnee, Wichita, Kansas 67211, (316) 263-2852. We will then refer you to an authorized service center to which the unit

may be returned, or we may advise you to return your unit to the factory for service. Under no circumstances should you return your unit to the factory without written instruction to do so. If service is required, you must

present the original or a copy of the bill of sale as a proof of date of purchase of your unit.

Upon receipt of your unit for service, GALAXY AUDIO or the authorized service center will repair or replace your unit as soon as possible, but in no event later than 30 days after the receipt of the unit. We will return

the unit to you, shipping charges prepaid, provided the necessary repairs are covered by this warranty.

IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR PARTICULAR PURPOSE ARE LIMITED IN DURATION TO THE LENGTH OF THIS WARRANTY, UNLESS OTHERWISE PROVIDED

FOR BY STATE LAW.

GALAXY AUDIO’S LIABILITY IS LIMITED TO THE REPAIR OR REPLACEMENT, AT OUR OPTION, OF ANY DEFECTIVE PRODUCT, AND SHALL IN NO EVENT INCLUDE INCIDENTAL OR

CONSEQUENTIAL DAMAGES OF ANY KIND.

SOME STATES DO NOT ALLOW LIMITATIONS ON HOW LONG AN IMPLIED WARRANTY LASTS AND/OR DO NOT ALLOW THE EXCLUSION OR LIMITATION OF INCIDENTAL OR CONSEQUEN-

TIAL DAMAGES, SO THE ABOVE LIMITATIONS AND EXCLUSIONS MAY NOT APPLY TO YOU.

GALAXY AUDIO does not authorize any third party, including any dealer or Authorized Service Center, to assume any liability on behalf of GALAXY AUDIO or to make any warranty for GALAXY AUDIO.

With Galaxy Audio’s Far Outlet personal power source,

a lunchbox-sized rechargeable supply of 110 house-

hold current, the CORE PA8X140 can be used where no

ACpowerisavailable.TheFAROUTLETisavailable

fromGalaxy Audiodealers.

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