ETI Sound Systems INC Stereo Amplifier ACT 1515XF User Manual

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The B-52 Pro-Audio speakers described in this instruction manual are intended for use directly on the ﬂoor, ground or stage. The ACT-1515X

described in this manual should NEVER be ﬂown. This model is intended primarily for use in mobile installations. A ﬂyable version of the

ACT-1515X, the ACT-1515XF has ﬂying hardware installed which is suitable for suspending a single ACT-1515XF.

Repeated exposure to direct sun will signiﬁcantly shorten the useful life of the loudspeaker system. Avoid exposing the system to

the elements whenever possible. Long term exposure to rain, high humidity and/or ultra violet rays will cause premature aging to the speaker

system. Prolonged use of the ACT-1515X(F) outdoors or in high-moisture areas can damage the speaker system and ampliﬁer.

Because of the forces needed to reach high SPL’s at low frequencies, the

intense vibrations of the woofers may cause the cabinet to move during a

performance. When placed on slick surfaces such as polished wood or smooth

tiles, the speaker may move (walk off the stage) during use. Precautions should

be taken to ensure the speaker system does not fall or slide off a stage or raised

surface. A high friction surface, like carpeting, works best to prevent this.

Make sure cables routed to and from the ACT-1515X(F) (and

any other connected loudspeakers) are secured with great care to prevent

accidents. Use all normal and necessary means to insure a safe performance!

FEATURES & BENEFITS

• New 15-160 Driver speciﬁcally designed and manufactured for the

ACT-1515X active systems. These woofers are optimized for both

efﬁciency and low frequency performance

• New Large format Waveguide - optimized for the longer throw

required from a large cabinet. Waveguide provides ideal radiation

impedance to its compression driver (Selenium D-210) down to 800hz

• New Ampliﬁer! - The new Class H ACT-1515X ampliﬁer is designed to

deliver 1000 watts of power without sacriﬁcing sound quality or

reliability.

USING THE ACT-1515X(F) WITH A SUBWOOFER

In order to use the ACT-1515X(F) with a subwoofer, an electronic crossover must be

placed between the mixer and the power ampliﬁer stages of the respective speakers.

This will divide the signal by frequency range, and route the appropriate range of

frequencices to the appropriate devices. Our recommendation for a starting point is

100 hz. You can experiment with different frequency settings of the crossover to ﬁnd

what works best for you. Since “the best” setting will depend on a number of factors,

there is no one correct answer for this question. Those factors inﬂuencing the best

choice of crossover point are:

• System Equalization - built into the ampliﬁer to act as the perfect

complement to the system loudspeaker components

• Compression circuitry - of high sophistication allows impressive SPLs

while minimizing the risk of damage to either the ampliﬁer or

loudspeakers

• Cabinet construction - Legendary B-52 cabinet quality and reliability;

road worthy and professional grade.

• Painted ﬁnish - For a lasting appearance the equal to or better than

cabinets costing much more

• Premium sound quality - With extraordinary output for less money

than its competitors, the hallmark of B-52 speaker systems.

•

Spectral distribution of the music.

Relative efﬁciency of subwoofer vs full range system

Maximum power available to full range and subwoofer system

Low frequency compression of subwoofer

Room acoustics

Position of listener(s)

Physical distance(s) from full range to subwoofer

How much bass the DJ likes....

Since some of these parameters are not within our control, (especially the last one) the

best method is to set the crossover frequency so that both amps tend to go into clipping

at about the same time. Otherwise when one will compress, the other will not, and the

result will be a level dependent shift in the spectral balance of the music.

Keeping your levels set so that the amps go into clipping as infrequently as

possible will give your speakers, ampliﬁers and ears a longer life, and is our advice.

HEARING DAMAGE

AND PROLONGED

EXPOSURE TO

EXCESSIVE SPL’S

B-52 Pro-Audio speakers can produce sound

levels high enough to cause permanent hearing

damage to performers, production crews or

people in the audience. Hearing protection

devices are recommended for use where long-

term exposure to high SPLs is not avoidable.

Remember, if it hurts, it is deﬁnitely too loud!

Long exposures to high SPLs cause ﬁrst

temporary threshold shifts; limiting your ability

to hear the actual loudness and exercise good judgment. Repeated long term exposure to high SPLs can and

WILL CAUSE PERMANENT HEARING LOSSES!

Ampliﬁer Module Precautions

Do not attempt to service the ACT-1515X(F) by yourself. Refer all servicing to a B-52

Pro-Audio Authorized dealer, or other qualiﬁed servicing personnel.

Service may be required if and when:

• The ACT-1515X(F) has had liquid spilled or objects have fallen inside the speaker system.

• A heavy object(s) has/have fallen onto the speaker

• The cabinet, amp or speaker has been damaged

• The speakers have been exposed to excessive rain or moisture

• The cabinet has been dropped hard enough to cause damage

• The amp has failed to turn on and has AC mains power available

• The amp or speaker(s) does not operate normally or as it should

• Keep your ACT-1515X(F) ampliﬁer away from any heat source.

• Do not cover your ACT-1515X(F) ampliﬁer so that the heat sink is partially or totally obstructed; doing so

will likely result in ampliﬁer overheating, triggering the shutdown or failure of the amp.

• In the unlikely event that the amp is being run so hard and long as to cause it to continually go into protect

mode and shut down, this result can be moderated by employing a fan to blow air (the colder the better)

across the ampliﬁer heat sink ﬁns. If this shutdown is happening without the amber Protect LED coming on,

or the RED Limit LED coming on often, then this may be a sign of a damaged ampliﬁer.

Please note the recommended exposure limits (right) in Table G-16. More information about these

limits is available on the US government Occupational Safety and Health (OSHA) website at: www.osha.gov

The table (above) is shown at:

http://www.osha.gov/pls/oshaweb/owadisp.show_document?p_id=9735&p_table=STANDARDS

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CONNECTIONS / IMPORTANT INFORMATION

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COMMON CONNECTION FOR

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THE ACT-1515X

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CAUTION

RISK OF ELECTRIC SHOCK

DO NOT OPEN

CAUTION

RISK OF ELECTRIC SHOCK

DO NOT OPEN

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BASIC TROUBLESHOOTING

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1) POWER ON/OFF SWITCH DOES NOT

LIGHT -Check your source of AC Mains power by plugging

in something you know is working into that same outlet.

Check the ﬁrmness of the connection of the AC Power cord

in both the wall and the IEC panel mount socket. Unplug the

AC cord and check the fuse for continuity with a multimeter

or ohmeter. If fuse is blown, replace it with the same type

and size, and then plug AC cord back into the wall outlet. If

fuse blows again, or Power on rocker switch fails to light,

service is required.

2) NO SOUND - Is power present? Is the Signal LED

lighting up? Are the cables ﬁrmly attached and plugged into

the correct jacks at each end? Are the level controls up high

enough? If the signal source (green LED) does not light try

ﬁrst changing signal cables and check the mixer for signs of

signal at the output. If all the above is not in question, the

unit requires service.

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ACT-1515X

1000-WATT ACTIVE

FULL-RANGE SYSTEM

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3) BAD OR PARTIALLY MISSING SOUND - If

the bass is weak, it is likely one or both woofers are blown.

If the highs are very muted, it is likely the compression

driver is blown. If the midrange is muted, it is likely the top

woofer is blown. If the distortion does not seem to get worse

with increasing level, the ampliﬁer alone may need service.

4) INTERMITTANT SOUND - It is possible that you

have a bad cable or connector socket. It is also possible that

this is a damaged speaker or ampliﬁer.

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CAUTION

RISK OF ELECTRIC SHOCK

DO NOT OPEN

CAUTION

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RISK OF ELECTRIC SHOCK

DO NOT OPEN

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5) LOUD ANNOYING HUM - You may have a

ground loop. Double check all connections and cables. A

miswired cable can signiﬁcantly increase hum. If all else

fails and you can insure the ampliﬁer chasis and metal

speaker parts will not be touched or closely approached

during use, try lifting the Earth ground with the rocker

switch (#8).

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ACT-1515X

1000-WATT ACTIVE

FULL-RANGE SYSTEM

1000-WATT ACTIVE

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FULL-RANGE SYSTEM

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To reduce the risk of ﬁre or electrical shock, do not expose this unit to rain or excess moisture. Do not operate your ACT-1515X(F) in or

near a pool or other standing water. In the event the powered speaker comes in contact with the water, an electrocution hazard may occur.

Do not bypass or defeat the grounding or polarization means used on the ACT-1515X(F) ampliﬁer. Make sure all blades on the polarized

grounded power plug are fully inserted into the AC mains power receptacle. Ensure the power cord is not stretched, pinched, chafed, or

otherwise damaged. Ensure the power cord is routed safely and secured to avoid the possibility of someone tripping over it.

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LIMITED WARRANTY

Thank you for choosing a B-52 sound product. B-52 manufactures

All-Tube Ampliﬁers will be free from defects in material and workman-

ship for a period of 90 DAYS from the original date of purchase (effec-

tive January 1, 2002). A dated sales receipt will establish coverage under

this warranty. This warranty will automatically terminate 90 Days after

the original retail sales date. This 90-Day warranty does not cover ser-

vice or parts to repair damage caused by accident, disaster, misuse, abuse,

over-powering, negligence, inadequate packing or shipping procedures

and service, repair or modiﬁcations of the ampliﬁer which has not been

authorized or approved by E.T.I.. This warranty is in lieu of all other ex-

pressed warranties. If this product is defective in materials or workman-

ship as warranted above, your sole remedy shall be repair or replacement

as provided above.

some of the world’s best sounding and most reliable professional speaker

systems, ampliﬁers and components. E.T.I. Sound Systems, Inc., makers of

B-52 Professional Audio equipment, take great pride in thoroughly testing

each B-52 product prior to shipment.

B-52 CABINETS: E.T.I. Sound Systems, Inc. offers a lifetime warranty

(effective January 1, 2002) to the original purchaser that a B-52’s cabinet

construction will be free from defects in material and workmanship. A dat-

ed sales receipt will establish coverage under this warranty. This warranty

does not cover service or parts to repair damage caused by neglect, abuse,

normal & wear and cosmetic appearance of the cabinetry not directly at-

tributed to defects in material or workmanship, or service, repair, modiﬁca-

tions of the cabinet, which has not been authorized or approved by E.T.I. If

this product is defective in materials or workmanship as warranted above,

your sole remedy shall be repair or replacement as provided above.

RETURN PROCEDURES: In the unlikely event that a defect should

occur, follow the procedure outlined below. Defective products must be

shipped, together with proof of purchase, freight pre-paid and insured to

the Authorized B-52 Dealer from whom you purchased the product or di-

rectly to E.T.I. Sound Systems. If a product must be returned to E.T.I.

Sound Systems for warranty replacement/repair, a Return Authorization

Number must be obtained from our Customer Service Department prior to

shipping the product.

LOUDSPEAKER AND MID-RANGE COMPONENTS: E.T.I. Sound

Systems, Inc. warrants the original purchaser that B-52 loudspeakers and/or

midrange components will be free from defects in material and workman-

ship for a period of (5) ﬁve years from the original purchase date (effective

January 1, 2002). A dated sales receipt will establish coverage under this

warranty. This warranty will automatically terminate (5) years after the

original retail sales date. This (5) ﬁve-year warranty does not cover service

or parts to repair damage caused by accident, disaster, misuse, abuse, burnt

voice-coils, over-powering, negligence, inadequate packing or shipping

procedures and service, repair or modiﬁcations of the component which

has not been authorized or approved by E.T.I.. This warranty is in lieu

of all other expressed warranties. If this product is defective in materials

or workmanship as warranted above, your sole remedy shall be repair or

replacement as provided above.

NEVER RETURN THE ENTIRE CABINET - JUST THE DEFEC-

TIVE COMPONENT: Identify and remove the defective component. If

you are uncertain which component is defective, or need directions for

removing a component, please contact our Customer Service Department

for assistance. Components which are a part of an original B-52 speaker

box must be sent directly to E.T.I. Products must be shipped in the original

packaging or its equivalent; in any case, the risk of loss or damage in tran-

sit is to be borne by the purchaser. The Return Authorization Number must

appear in large print directly below the shipping address. Always include

a brief description of the defect, along with your correct return address

and telephone number. When calling to inquire about a returned product,

always refer to the Return Authorization Number. If E.T.I. determines that

the unit was defective in materials or workmanship at any time during the

warranty period, E.T.I. has the option of repairing or replacing the product

at no additional charge, except as set forth below. All replaced parts be-

come a property of E.T.I.

HIGH-FREQUENCY DEVICES: E.T.I. Sound Systems, Inc. offers a

lifetime warranty (effective January 1, 2002) to the original purchaser

that B-52 high frequency (tweeters) devices will be free from defects in

material and workmanship. A dated sales receipt will establish coverage

under this warranty. This warranty does not warranty neglect or abuse.

NO WARRANTY IS OFFERED ON HIGH-FREQUENCY DEVICES IN

B-52 SYSTEMS WITH A BI-AMP SWITCH OPTION. The lifetime war-

ranty on high-frequency devices does not cover service or parts to repair

damage caused by accident, disaster, misuse, abuse, negligence, inadequate

packing or shipping procedures or service, repair or modiﬁcations of the

product which has not been authorized or approved by E.T.I. This warranty

is in lieu of all other expressed warranties. If this product is defective in

materials or workmanship as warranted above, your sole remedy shall be

repair or replacement as provided above.

Products replaced or repaired under this warranty will be returned via

ground-shipping-within the United States-freight prepaid. E.T.I. is not re-

sponsible for costs associated with expedited shipping, either to E.T.I. or

the return of the product to the customer.

INCIDENTAL OR CONSEQUENTIAL DAMAGE: In no event will

E.T.I. be liable for any incidental or consequential damages arising out

of the use or inability to use of any B-52 product, even if E.T.I. or a B-52

dealer has been advised of the possibility of such damages, or any other

claim by any other party. Some states do not allow the exclusion or limita-

tion of consequential damages, so the above limitation and exclusion may

not apply to you. This warranty gives you speciﬁc legal rights and you may

also have other rights which may vary from state to state.

GUITAR AMPLIFIERS: E.T.I. Sound Systems, Inc. warrants the origi-

nal purchaser that B-52 guitar ampliﬁers will be free from defects in mate-

rial and workmanship for a period of (5) FIVE years from the original pur-

chase date (effective January 1, 2002). A dated sales receipt will establish

coverage under this warranty. This warranty will automatically terminate

(5) years after the original retail sales date. This (5) ﬁve-year warranty

does not cover service or parts to repair damage caused by accident, di-

saster, misuse, abuse, over-powering, negligence, inadequate packing or

shipping procedures and service, repair or modiﬁcations of the ampliﬁer

which has not been authorized or approved by E.T.I.. This warranty is in

lieu of all other expressed warranties. If this product is defective in materi-

als or workmanship as warranted above, your sole remedy shall be repair

or replacement as provided above.

FOR YOUR PROTECTION: Please complete and mail the Purchase In-

formation Card within (10) ten days of the date of purchase so that we may

contact you directly in the event a safety notiﬁcation issued in accordance

with the 1972 Consumer Product Safety Act. In addition, we ask that you

complete the brief questionnaire so me may analyze your answers and in

this way, help us evaluate our customer needs.

CUSTOMER SERVICE: Our dedicated staff is ready to help you

with any B-52 warranty or product questions you may have. Please call

323-277-4100 (9:00AM to 4:00PM Paciﬁc Standard Time, United

States).

GUITAR AMPLIFIER TUBES: E.T.I. Sound Systems, Inc. warrants

the original purchaser that ampliﬁer tubes used in B-52 Stealth Series

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B-52 PROFESSIONAL

3383 Gage Avenue, Huntington Park, CA, 90255

Phone: 323-277-4100 Fax: 323-277-4108

National: 1-800-344-4ETI

Internet: www.B-52PRO.com

E-mail: [email protected]

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