DSA: Difference between revisions
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{{Infobox siren|title=Federal Signal DSA|image=Official DSA.jpg|caption=A Federal Signal DSA4x2, as depicted on Federal Signal's website.|company=[[Federal Signal Corporation]]|produced=1990-Present|type=[[Directional]] [[Electronic]]|output=111-121 dB @ 100 feet|wattage=200-600|preceded=[[Federal Signal EOWS]]|manual=https://www.fedsig.com/sites/default/files/resource_library_document/20230424163952-RA-25500171%20A3%200423-0.pdf|voltage=24/48|current=DC|sheet=https://wiki.airraidsirens.net/images/3/35/CS_DSA_040518.pdf}} | {{Infobox siren|title=Federal Signal DSA|image=Official DSA.jpg|caption=A Federal Signal DSA4x2, as depicted on Federal Signal's website.|company=[[Federal Signal Corporation]]|produced=1990-Present|type=[[Directional]] [[Electronic]]|output=111-121 dB @ 100 feet|wattage=200-600|preceded=[[Federal Signal EOWS]]|manual=https://www.fedsig.com/sites/default/files/resource_library_document/20230424163952-RA-25500171%20A3%200423-0.pdf|voltage=24/48|current=DC|sheet=https://wiki.airraidsirens.net/images/3/35/CS_DSA_040518.pdf}} | ||
The ''' | The '''Model''' '''DSA''' (''<u>D</u>irectional <u>S</u>peaker <u>A</u>rray'') is an electronic siren produced by [[:Category:Federal Signal Corporation|Federal Signal]]. The DSA was released alongside the Modulator in 1990 and directly replaced the older omnidirectional [[Federal Signal EOWS|EOWS*115]] and EOWS*1212. It is Federal Signal's directional and cheaper alternative to the Modulator, intended for use where true omnidirectional coverage is not required or for mounting on walls. | ||
== History and Design == | == History and Design == | ||
[[File:IMG 6119.JPG|thumb|A DSA 2x2 mounted atop the now-condemned Gallucci Residence Hall at the University of Akron in Akron, Ohio. This siren was installed in March of 2008 by Federal Field Services.|264x264px]]The DSA was released alongside the Modulator in 1990, and directly replaced the older omnidirectional [[Federal Signal EOWS|EOWS*115]] and EOWS*1212. The DSA is essentially a directional Modulator, using the exact same 100 W speaker compression drivers to produce sound. Each DSA array is made of 2-6 fibreglass Atlas CJ46 speakers attached to an aluminum rear housing which contains the speaker drivers. This makes it very similar in appearance to sirens such as the Whelen [[Whelen WS-2000|WS-2000]] and [[Alerting Communicators of America|ACA's]] [[ACA Alertronic|Alertronic]] sirens. Each array can support up to 6 speakers/drivers, for a total of 600 W. Up to 4 arrays are supported on one controller, and the DSA is compatible with the SiraTone, MC, MCP and UltraVoice controllers produced by Federal Signal. These arrays do not appear to be made by Federal Signal themselves, instead being bought from elsewhere, as early [[Acoustic Technology, Inc.|ATI HPSS-16]] units used identical arrays. | [[File:IMG 6119.JPG|thumb|A DSA 2x2 mounted atop the now-condemned Gallucci Residence Hall at the University of Akron in Akron, Ohio. This siren was installed in March of 2008 by Federal Field Services.|264x264px]]The DSA was released alongside the Modulator in 1990, and directly replaced the older omnidirectional [[Federal Signal EOWS|EOWS*115]] and EOWS*1212. The DSA is essentially a directional Modulator, using the exact same 100 W speaker compression drivers to produce sound. | ||
It it comprised of speaker modules that vertically hold 2 to 6 speakers with projectors. Up to 4 can be installed on a mount, and at different angles, depending on coverage requirements. Each DSA array is made of 2-6 fibreglass Atlas CJ46 speakers attached to an aluminum rear housing which contains the speaker drivers. This makes it very similar in appearance to sirens such as the Whelen [[Whelen WS-2000|WS-2000]] and [[Alerting Communicators of America|ACA's]] [[ACA Alertronic|Alertronic]] sirens. Each array can support up to 6 speakers/drivers, for a total of 600 W. Up to 4 arrays are supported on one controller, and the DSA is compatible with the SiraTone, MC, MCP and UltraVoice controllers produced by Federal Signal. These arrays do not appear to be made by Federal Signal themselves, instead being bought from elsewhere, as early [[Acoustic Technology, Inc.|ATI HPSS-16]] units used identical arrays. | |||
Different sized arrays can be used in the same installation according to needs, such as if extra sound output is needed in a particular direction. Each DSA array comes with 4 stainless steel mounting brackets, which can be attached directly to a pole or wall, depending on installation needs. The arrays can be swiveled downwards up to 15 degrees. The DSA can be mounted on 3 different pole mount models, the DSAMK1 which holds 1 module, the DSAMK2 which holds 2 and the DSAMK4 which holds 4. | Different sized arrays can be used in the same installation according to needs, such as if extra sound output is needed in a particular direction. Each DSA array comes with 4 stainless steel mounting brackets, which can be attached directly to a pole or wall, depending on installation needs. The arrays can be swiveled downwards up to 15 degrees. The DSA can be mounted on 3 different pole mount models, the DSAMK1 which holds 1 module, the DSAMK2 which holds 2 and the DSAMK4 which holds 4. | ||
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DSA arrays are often named by both the number of speakers per array, and the number of arrays attached to the controller. As an example, an installation of 4 arrays with 6 speakers is known as a DSA6x4. Installations with multiple sizes of arrays are simply known as DSAs. | DSA arrays are often named by both the number of speakers per array, and the number of arrays attached to the controller. As an example, an installation of 4 arrays with 6 speakers is known as a DSA6x4. Installations with multiple sizes of arrays are simply known as DSAs. | ||
The DSA is still sold by Federal Signal today | The DSA is still sold by Federal Signal today and competes with other directional electronic sirens such as the [[ASC E-Class]], [[Acoustic Technology, Inc.|ATI HPSS]], and Whelen [[Whelen HORNET|WS400H.]] It is a common find as a campus or industrial siren due to its wall mounting capabilities, cost, and versatility. | ||
[[Category:Federal Signal Corporation]][[Category:Electronic Sirens]][[Category:Single Toned Sirens]][[Category:Dual Toned Sirens]] | [[Category:Federal Signal Corporation]][[Category:Electronic Sirens]][[Category:Single Toned Sirens]][[Category:Dual Toned Sirens]] | ||
[[Category:Sirens]] | [[Category:Sirens]] | ||
[[Category:Directional Sirens]] | [[Category:Directional Sirens]] | ||
__INDEX__ | __INDEX__ | ||
Latest revision as of 16:32, 4 December 2024
| Federal Signal DSA | |
 A Federal Signal DSA4x2, as depicted on Federal Signal's website. | |
| Company | Federal Signal Corporation |
|---|---|
| Produced | 1990-Present |
| Type | Directional Electronic |
| Sound output | 111-121 dB @ 100 feet |
| Wattage | 200-600 |
| Voltage | 24/48 V DC |
| Preceded by | Federal Signal EOWS |
| Documentation | Manual Product sheet |
The Model DSA (Directional Speaker Array) is an electronic siren produced by Federal Signal. The DSA was released alongside the Modulator in 1990 and directly replaced the older omnidirectional EOWS*115 and EOWS*1212. It is Federal Signal's directional and cheaper alternative to the Modulator, intended for use where true omnidirectional coverage is not required or for mounting on walls.
History and Design
The DSA was released alongside the Modulator in 1990, and directly replaced the older omnidirectional EOWS*115 and EOWS*1212. The DSA is essentially a directional Modulator, using the exact same 100 W speaker compression drivers to produce sound.
It it comprised of speaker modules that vertically hold 2 to 6 speakers with projectors. Up to 4 can be installed on a mount, and at different angles, depending on coverage requirements. Each DSA array is made of 2-6 fibreglass Atlas CJ46 speakers attached to an aluminum rear housing which contains the speaker drivers. This makes it very similar in appearance to sirens such as the Whelen WS-2000 and ACA's Alertronic sirens. Each array can support up to 6 speakers/drivers, for a total of 600 W. Up to 4 arrays are supported on one controller, and the DSA is compatible with the SiraTone, MC, MCP and UltraVoice controllers produced by Federal Signal. These arrays do not appear to be made by Federal Signal themselves, instead being bought from elsewhere, as early ATI HPSS-16 units used identical arrays. Different sized arrays can be used in the same installation according to needs, such as if extra sound output is needed in a particular direction. Each DSA array comes with 4 stainless steel mounting brackets, which can be attached directly to a pole or wall, depending on installation needs. The arrays can be swiveled downwards up to 15 degrees. The DSA can be mounted on 3 different pole mount models, the DSAMK1 which holds 1 module, the DSAMK2 which holds 2 and the DSAMK4 which holds 4.
The DSA arrays are named as follows:
| Model | dB @ 100ft | Number of drivers/speakers per array |
|---|---|---|
| DSA2 | 111 dB | 2 |
| DSA3 | 115 dB | 3 |
| DSA4 | 117 dB | 4 |
| DSA5 | 119 dB | 5 |
| DSA6 | 121 dB | 6 |
DSA arrays are often named by both the number of speakers per array, and the number of arrays attached to the controller. As an example, an installation of 4 arrays with 6 speakers is known as a DSA6x4. Installations with multiple sizes of arrays are simply known as DSAs.
The DSA is still sold by Federal Signal today and competes with other directional electronic sirens such as the ASC E-Class, ATI HPSS, and Whelen WS400H. It is a common find as a campus or industrial siren due to its wall mounting capabilities, cost, and versatility.