Technical Information

502B Acoustimass® BassEnclosure

Frequency range55Hz – 150Hz

Active equalization (with 502C)Required

Nominal Impedance8Ω

Maximum acoustic output1

115dB-SPL average; 122dB-SPL peak

Recommended amplifier power450-1200 Watts continuous into 8Ω

Sensitivity2

90dB-SPL (1W, 1m), 55Hz to 150Hz

Long-Term power handling3

450 Watts continuous

Mechanical SpecificationsDimensions: 31.0" H x 14.0" W x 15.5" D(78.7 cm H x 35.6 cm W x 39.4 cm D)

Weight: 85 pounds (38.6 kg)

Mounting points: Eight (8) 8mm threaded inserts,20mm depth

Fuse: 7-ampere AGC 3AG (Littelfuse)

Connectors: Two (2) parallel-wired barrier strips4

502A Controlled Array

Frequency range130Hz – 15kHz

Active equalization (with 502C)Required

Nominal Impedance8Ω

Maximum acoustic output1

112dB-SPL average; 121dB-SPL peak

Recommended amplifier power150-600 Watts continuous into 8Ω

Sensitivity2

90dB-SPL (1W, 1m), 130Hz to 15kHz

Beamwidth (-6dB point)120° horizontal; 70º vertical

Long-Term power handling3

150 Watts continuous

Mechanical SpecificationsDimensions: 23.5" H x 5.75" W x 6.75" D(59.7 cm H x 14.6 cm W x 17.1 cm D)

Weight: 15 pounds (6.8 kg)

Mounting points: Six (6) 8mm threadedinserts, 11mm depth

Fuse: 4-ampere AGC 4 (Buss) or 3AG(Littelfuse)

Connectors: Two (2) parallel-wired barrierstrips4

502C Systems Controller

Number of audio channelsTwo

Operating Modes502A Full-range, bi-amp; option (w/optioncard)

Rear panel connectors4

Balanced input x 2 (barrier strip)Balanced high freq. output x 2 (barrier strip)Balanced low freq. output x 2 (barrier strip)

Crossover140Hz in bi-amp mode (with 502B);rolloff slope: -18dB/octave

Rear panel controlsMode switchInput sensitivity switch x 2 (-10dB-V, +4dB-V)Bass level control (range -18dB to +3dB)Bass mono switch (norm/sum)

Electrical specificationsChannel separation: >60dB @ 1kHzInput impedance: 2.4kΩ nominalOutput impedance: 600Ω nominalOutput level: 8.0 V RMS max. into 600Ω

Mechanical SpecificationsDimensions: 120 V/barrier strip –1.75" H x19.0" W x 8.75" D(4.4 cm H x 48.3 cm W x 22.2 cm D)

220-240 V/XLR – 1.75" H x 19.0" W x 8.0" D(4.4 cm H x 48.3 cm W x 20.3 cm D)

Weight: 5.5 pounds (2.5 kg)

Bose® Panaray®

Sound System(502®A, 502B, 502C)

1 Full bandwidth pink noise is applied to the 502C Systems Controller and amplified to a level at the speaker terminals corresponding to the long-term rated power handling of thespeaker. The average sound pressure level (dB-SPL) is measured at 1 meter from the speaker in an anechoic environment. The peak maximum acoustic output is the peak SPLpossible with the maximum recommended amplifier power using musical program material.

2 Full bandwidth pink noise is applied to the 502C Systems Controller and amplified to a level at the speaker terminals corresponding to one Watt as referenced to the nominalimpedance. The average sound pressure level (dB-SPL) is measured at 1 meter from the speaker in an anechoic environment.

3 Full bandwidth noise, meeting the International Electrotechnical Commission standard #268-5, is applied to the 502C Systems Controller and amplified to a voltage at the speakerterminals corresponding to the power handling of the speaker. The speaker must show no visible or measurable loss of performance after 100 hours of continuous testing.

4 International versions use XLR-type connectors.

• New 5-driver array design–optimized forsmooth coverage at all frequencies

• Modular components for system designflexibility

• Bose-patented Acountimass® bassenclosure

• Sleek, elegant design for architecturalcompatibility

• Full line of Bose-designed accessories foreasy installation

• New electronic systems controller

• Available in two colors, plus paintable

System Description

Component Description

The Bose® Panaray® Sound System is afully modular system which representssignificant advances in loudspeakerarray, low frequency transducer, andsystem control technology. The basicPanaray system consists of two 502®Acontrolled arrays, one 502B Acousti-mass® bass enclosure, and one 502Csystem controller, and provides up to122dB peak SPL (at 1 meter, driven withmaximum recommended amplifierpower) over the 55Hz to 15kHz range.

Extensive research has yielded newtechnology in array design which, using aproprietary arrangement of Bose 4.5 inchfull range drivers, results in tightlycontrolled horizontal and verticalbeamwidth, and extemely smooth band-to-band directivity. The system alsofeatures a new, compact low frequencyenclosure using Bose-patented Acousti-mass technology. The Panaray soundsystem is a highly aesthetic voice ormusic sound reinforcement system forpermanent audio installations in theaters,auditoriums, churches, nightclubs,transportation facilities, and other placeswhere people gather to be entertained,enlightened, or informed.

The 502A Controlled Array is a mid-highfrequency component of the BosePanaray system. It features five new-design 4.5" (11.4 cm) helical voice coildrivers in a slim, elegantly-designedenclosure. The result is natural sounding,extremely even coverage at all frequen-cies over the entire listening area. It canbe used either with the 502B Acousti-mass bass enclosure for full frequencysound reinforcement, or separately forvoice-only reinforcement systems. The

Two-point suspension is easy toaccomplish using the Bose CSB-5Bsuspension bracket. The 502B isavailable in both Professional Gray andArctic White, and is covered with ascratch resistant vinyl, which can bepainted to match any decor.

The 502C systems controller is a singlerack space device which providescross-over functions, active electronicequalization, and dual channel signalprocessing for both the 502A and502B. It features -10/+4dB-V inputsensitivity switches, all-balanced inputsand outputs, -18/+3dB bass levelcontrol, bass mono sum switch,automatic output muting on turn-off,and a secure, rear-panel operatingmode switch.

An optional plug-in card is available forthe 502C which allows 502A controlledarrays to be combined in a soundsystem design with the Bose AcousticWave® Cannon system.

The Panaray system includes a com-plete line of accessories for suspendingor mounting both the 502A and 502B ina wide variety of configurations.

502A array is designed for installability ina variety of configurations, using itsintegral 10x safety-rated attachmentpoints and Bose suspension and mount-ing accessories. The baffle and rear panelare constructed of high strength structuralfoam, and the speaker grille is construct-ed of a durable perforated steel. It isavailable in both Professional Gray andArctic White, and both the enclosure andgrille are fully paintable to match interiordecor.

The 502B Acoustimass bass enclosureuses a single high power handling, highreliability 12" (30 cm) woofer. This newBose-designed low frequency transducerfeatures a high temperature 4" (10.2 cm)voice coil, cast aluminum basket, and ahigh durablility rubber surround. The502B provides clear, deep bass reinforce-ment from a small enclosure, as a resultof Bose-patented Acoustimass speakertechnology. Its low crossover frequencyresults in a non-localizable sound source,which allows it to be unobtrusively install-ed apart from the 502A arrays. The enclo-sure is fitted with 10x safety-rated attach-ment points (top and bottom) for mount-ing in a variety of orientations.

nominal horizontal

nominal vertical

300˚

200˚

100˚

80˚

60˚

40˚

30˚

20˚

10˚100 500 1,000 5,000 10,000

Beamwidth*(-6 dB point)

Beamwidth* vs. Frequency of 502A Controlled ArrayFrequency [Hz]

* Beamwidth is the -6dB point, in each one-third octave band, on a polor plot representing theaverage within ten degrees of the horizontal and vertical planes about the array.

* Directivity is the ratio, in each one-third octave band, of the average response in the nominal 120º x 70º polar window, to the average responseover the entire solid angle about the source.

100

Directivity (Q)*

Directivity vs. Frequency of 502A Controlled Array

10

1

100 500 1,000 5,000 10,000Frequency [Hz]

System Configurations

The Bose® Panaray® system provides aflexible, building-block approach to fitthe sound reinforcement requirements ofmany types of applications, from nightclubs to cathedrals. Detailed installationand system design guidelines for thePanaray System are provided in thePanaray System Owner's Guide. Forillustrative purposes, here are sometypical system configurations.

Figure 1 shows a block diagram of thebasic Panaray System, consisting of one502®B, two 502A's, one 502C, and threechannels of amplication for a stereosystem. This system provides 115dBSPL @ 1 m average acoustic output.Additional low frequency output caneasily be achieved by locating thecabinet against large hard surfaces.(There is also bass volume adjustmentpossible through the rear-panel controlon the 502C).

Figure 2 illustrates how components canbe added to the basic Panaray system toachieve a variety of SPL or coveragerequirements. One example of anexpanded system would be a small discodance area. In this application, fourarrays at the outer corners of the dancefloor, plus two 502B's on the flooradjacent to the dance area, will deliverapproximately 118dB SPL average, with130dB SPL peaks, all components drivenat maximum recommended amplifierpower.

Figure 3 shows how the Panaray compo-nents can be interconnected for a voice-only paging system. This system is idealfor applications where voice reinforce-ment is needed over a large area, suchas an airport terminal or a train station.Through the use of the Bose CVT-5constant voltage transformer, multiple502A's can be installed in a 70/100Vconstant voltage distributed system.(This system operates from 130Hz andabove only, and is not recommended foruse where music is an integral part of theprogram material).

Figure 1: Basic Panaray system

®®

502 C

SER. NO. D.O.M. CH 1

INPUT LEVEL

–10 +4

INPUT

CH 2

INPUT LEVEL

–10 +4

MODE

4

123

PROTECTED BY U.S. PATENT 3,038,964

REFER TO YOUR INSTRUCTION MANUAL FOR PROPER INSTALLATIONAND OPERATING PROCEDURES. INCORRECT WIRING MAY RESULT IN

CAUTION AVISRISK OF ELECTRICAL SHOCK

DO NOT OPENRISQUE DE CHOC ELECTRIQUE

NE PAS OUVRIR

WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRICAL SHOCKDO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE.

MODE SWITCH GUIDEPOSITION OPERATING MODE

4 2-WAY WITH LOW FREQUENCY OPTION(NOT USED)3

STANDARD 2-WAY (WITH 502B)2VOICE ONLY/FULL RANGE (WITH 502A)1

HIGHFREQ

OUTPUT

CH 1 CH 2

LOW FREQLEVEL

0.

.

.

..

.

.

+3-18

BOSE CORPORATION, FRAMINGHAM, MA 01701-9168ENGINEERED AND MANUFACTURED IN U.S.A.

OUTPUT MODE

NORM SUM

LOWFREQ

OUTPUT

CH 1 CH 2

230V~AC50/60Hz 12W

INPUT B

INPUT B INPUT ABRIDGE

INPUT A

220 V~ MADE IN USA

CAUTIONIn order to grant a secure operation do not mount the amplifier ina fully closed housing. To preven electric shock, do not removecover. Disconnect power line in case of servicing.ACHTUNG:Um sichere Funktion zu gewährielsten, Gerät nicht in vollständiggeshlossenes Gehäuse einbauen. Abdeckung während desBetriebes nicht entfernen. Bor Offnen des Gerätes Netzsteckerziehen.Bose Corporation, Framinhman 01701, Mass, U.S.A.Serial No.:Made in Germany

OUTPUT B BRIDGE OUTPUT OUTPUT A

ON

OFF

INPUT B

INPUT B INPUT ABRIDGE

INPUT A

220 V~ MADE IN USA

CAUTIONIn order to grant a secure operation do not mount the amplifier ina fully closed housing. To preven electric shock, do not removecover. Disconnect power line in case of servicing.ACHTUNG:Um sichere Funktion zu gewährielsten, Gerät nicht in vollständiggeshlossenes Gehäuse einbauen. Abdeckung während desBetriebes nicht entfernen. Bor Offnen des Gerätes Netzsteckerziehen.Bose Corporation, Framinhman 01701, Mass, U.S.A.Serial No.:Made in Germany

OUTPUT B BRIDGE OUTPUT OUTPUT A

ON

OFF

L

R

HighFrequencyOutput

Low FrequencyOutput

Amplifier

Amplifier

L

RL

R

502A(Left)

502A(Right)

502B

FromPre-amplifier

®®

Figure 2: Expanded Panaray system

502A

Constant-Voltage502 C

INPUT B

INPUT B INPUT ABRIDGE

INPUT A

220 V~ MADE IN USA

CAUTIONIn order to grant a secure operation do not mount the amplifier ina fully closed housing. To preven electric shock, do not removecover. Disconnect power line in case of servicing.ACHTUNG:Um sichere Funktion zu gewährielsten, Gerät nicht in vollständiggeshlossenes Gehäuse einbauen. Abdeckung während desBetriebes nicht entfernen. Bor Offnen des Gerätes Netzsteckerziehen.Bose Corporation, Framinhman 01701, Mass, U.S.A.Serial No.:Made in Germany

OUTPUT B BRIDGE OUTPUT OUTPUT A

ON

OFF

SER. NO. D.O.M. CH 1

INPUT LEVEL

–10 +4

INPUT

CH 2

INPUT LEVEL

–10 +4

MODE

4

123

PROTECTED BY U.S. PATENT 3,038,964

REFER TO YOUR INSTRUCTION MANUAL FOR PROPER INSTALLATIONAND OPERATING PROCEDURES. INCORRECT WIRING MAY RESULT IN

CAUTION AVISRISK OF ELECTRICAL SHOCK

DO NOT OPENRISQUE DE CHOC ELECTRIQUE

NE PAS OUVRIR

WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRICAL SHOCKDO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE.

MODE SWITCH GUIDEPOSITION OPERATING MODE

4 2-WAY WITH LOW FREQUENCY OPTION(NOT USED)3

STANDARD 2-WAY (WITH 502B)2VOICE ONLY/FULL RANGE (WITH 502A)1

HIGHFREQ

OUTPUT

CH 1 CH 2

LOW FREQLEVEL

0.

.

.

..

.

.

+3-18

BOSE CORPORATION, FRAMINGHAM, MA 01701-9168ENGINEERED AND MANUFACTURED IN U.S.A.

OUTPUT MODE

NORM SUM

LOWFREQ

OUTPUT

CH 1 CH 2

230V~AC50/60Hz 12W

502A

CVT-5

CVT-5

CVT-5

502A

502A

CVT-5

High Frequency

From

®®

®®

®®

®®

Figure 3: Distributed voice-only system

High FrequencyAmplifier One

Bass Amplifier502 C

502A

502A

502B

®®

®®

502A

502A

®®

®®

502B

INPUT B

INPUT B INPUT ABRIDGE

INPUT A

220 V~ MADE IN USA

CAUTIONIn order to grant a secure operation do not mount the amplifier ina fully closed housing. To preven electric shock, do not removecover. Disconnect power line in case of servicing.ACHTUNG:Um sichere Funktion zu gewährielsten, Gerät nicht in vollständiggeshlossenes Gehäuse einbauen. Abdeckung während desBetriebes nicht entfernen. Bor Offnen des Gerätes Netzsteckerziehen.Bose Corporation, Framinhman 01701, Mass, U.S.A.Serial No.:Made in Germany

OUTPUT B BRIDGE OUTPUT OUTPUT A

ON

OFF

SER. NO. D.O.M. CH 1

INPUT LEVEL

–10 +4

INPUT

CH 2

INPUT LEVEL

–10 +4

MODE

4

123

PROTECTED BY U.S. PATENT 3,038,964

REFER TO YOUR INSTRUCTION MANUAL FOR PROPER INSTALLATIONAND OPERATING PROCEDURES. INCORRECT WIRING MAY RESULT IN

CAUTION AVISRISK OF ELECTRICAL SHOCK

DO NOT OPENRISQUE DE CHOC ELECTRIQUE

NE PAS OUVRIR

WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRICAL SHOCKDO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE.

MODE SWITCH GUIDEPOSITION OPERATING MODE

4 2-WAY WITH LOW FREQUENCY OPTION(NOT USED)3

STANDARD 2-WAY (WITH 502B)2VOICE ONLY/FULL RANGE (WITH 502A)1

HIGHFREQ

OUTPUT

CH 1 CH 2

LOW FREQLEVEL

0.

.

.

..

.

.

+3-18

BOSE CORPORATION, FRAMINGHAM, MA 01701-9168ENGINEERED AND MANUFACTURED IN U.S.A.

OUTPUT MODE

NORM SUM

LOWFREQ

OUTPUT

CH 1 CH 2

230V~AC50/60Hz 12W

INPUT B

INPUT B INPUT ABRIDGE

INPUT A

220 V~ MADE IN USA

CAUTIONIn order to grant a secure operation do not mount the amplifier ina fully closed housing. To preven electric shock, do not removecover. Disconnect power line in case of servicing.ACHTUNG:Um sichere Funktion zu gewährielsten, Gerät nicht in vollständiggeshlossenes Gehäuse einbauen. Abdeckung während desBetriebes nicht entfernen. Bor Offnen des Gerätes Netzsteckerziehen.Bose Corporation, Framinhman 01701, Mass, U.S.A.Serial No.:Made in Germany

OUTPUT B BRIDGE OUTPUT OUTPUT A

ON

OFF

INPUT B

INPUT B INPUT ABRIDGE

INPUT A

INPUT B

INPUT B INPUT ABRIDGE

INPUT A

220 V~ MADE IN USA

CAUTIONIn order to grant a secure operation do not mount the amplifier ina fully closed housing. To preven electric shock, do not removecover. Disconnect power line in case of servicing.ACHTUNG:Um sichere Funktion zu gewährielsten, Gerät nicht in vollständiggeshlossenes Gehäuse einbauen. Abdeckung während desBetriebes nicht entfernen. Bor Offnen des Gerätes Netzsteckerziehen.Bose Corporation, Framinhman 01701, Mass, U.S.A.Serial No.:Made in Germany

OUTPUT B BRIDGE OUTPUT OUTPUT A

ON

OFF

High FrequencyAmplifier Two

Panaray® Accessories

Engineers' and Architects'Specifications

A full line of accessories has beenspecially designed by Bose® for use withthe Panaray system components. Theseaccessories increase system configura-tion flexibility and provide simplesolutions for typical installation chal-lenges.

502®A Controlled Array Accessories

• CSB-5A Suspension Bracket (2-pointgravitational type, 0º–45º pitch range)

• WCB-5 U-bracket (for wall/ceilingsurface mounting, ±90º range)

• WBP-5 Bi-Pivot Bracket (single-pointsurface mount, 0º–45º pitch, ±80º yaw)

• CVT-5 Constant Voltage Transformer(70/100 volt distributed system trans-former and housing)

• PSA-5 Stand Adapter (compatible withBose SS-5 and SS-10 stands)

502B Acoustimass® Bass EnclosureAccessories

• CSB-5B Suspension Bracket (2-pointgravitational type, 0º–30º pitch range)

502C Systems Controller Accessories

• Acoustic Wave® Cannon system optioncard for active equalization (not shown)

The Bose Panaray 502A Controlled Arrayand the 502B Acoustimass Bass Enclo-sure, are both covered by a five-year,transferable limited warranty. The Bose502C System Controller is covered by atwo-year, transferable limited warranty.

Warranty Information

WCB-5U-bracket

CSB-5ASuspensionBracket

PSA-5Stand Adapter

WBP-5Bi-PivotBracket

502A Controlled Array:

The mid-high frequency device shall be amultiple-driver system with matchedactive equalization as follows:

The transducer complement shallconsist of five (5) high-sensitivity driversof 4.5 inches (11.4 cm) diameter,mounted vertically on a single baffleassembly such that directional charac-teristics are optimized for smoothresponse.

The input connector, located on the rearof the array enclosure, shall consist of ascrew-type barrier strip.

The array enclosure shall be composedof copolymer materials, with outerdimensions of 23.5" H x 5.75" W x 6.76"D (59.7 cm H x 14.6 cm W x 17.1 cm D);its weight shall be 15 lbs (6.8 kg).

The array maximum acoustic outputshall be 112dB SPL from 130Hz to15kHz, with measurements referenced tofull-bandwidth pink-noise input at 1meter at the array's rated power. Itspower handling capacity shall be 150Watts continuous referenced to IECnoise for 100 hours. The nominalhorizontal beamwidth shall be 120º. Thenominal vertical beamwidth shall be 70º.

The loudspeaker shall be the BosePanaray 502A Controlled Array. © 1995 Bose Corporation, The Mountain, Framingham, MA

01701-9168 USA JN96508 PN171946-Rev. 1

502B Acoustimass Bass Enclosure

The low frequency device shall be a dualported highly compact enclosure withmatched active equalization as follows:

The transducer complement shall consistof one (1) high power handling driver of30 cm diameter, mounted inside anenclosure such that distortion is mini-mized as a result of acoustic filtering. Itsoperating frequency range shall be below150Hz so that non-localizability shallallow a high degree of location place-ment flexibility.

The input connector, located on the rearof the enclosure, shall be a screw-typebarrier strip.

The enclosure shall be made of highstrength, high density resin-impregnatedvinyl wrapped particle board, with outerdimensions of 31.0" H x 14.0" W x 15.5"D (78.7 cm H x 35.6 cm W x 39.4 cm D);its weight shall be 85 lbs (38.6 kg).

The bass enclosure's maximum acousticoutput shall be 115dB SPL from 55Hz to150Hz, with measurements reference toa full-bandwidth pink-noise input at 1meter at the enclosure's rated power. Itspower handling capacity shall be 450Watts continuous referenced to IECnoise for 100 hours.

The bass enclosure shall be the BosePanaray 502B Acoustimass Bassenclosure.

502C Systems Controller:

The array and/or bass enclosure shall besupplied with a fixed 2-channel, systemscontroller which provides active elec-tronic equalization and crossoverfunctions, to be connected before theinput(s) of the system power amplifier(s).

The systems controller shall use screw-type terminal strips for balanced inputand output wiring connections, and shallbe rack mountable in a single space of astandard 19" equipment rack.

It shall also include an operating modeswitch,input sensitivity switch, lowfrequency output level control, and monosum switch.

The electronic controller shall be theBose 502C System Controller.

®

CSB-5BSuspensionBrackets

CVT-5 Constant Voltage Transformer