The AtlasIED HT87 is a high-quality 70.7V line matching transformer designed to connect conventional 4-ohm and 8-ohm loudspeakers to commercial distributed audio systems. Featuring selectable 1W, 2W, 4W, and 8W power taps, the HT87 provides flexible speaker power matching for background music, paging, and public address installations.
Built with audio-grade laminations, the AtlasIED HT87 delivers reliable transformer performance while helping maintain clear speech and music reproduction. Its 50Hz–15kHz frequency response (±1dB) and maximum 1.0dB insertion loss make it suitable for commercial sound systems where consistent audio quality is important.
With a compact design and an 8-watt maximum power rating, the HT87 is particularly useful for integrating low-power conventional loudspeakers into 70.7V speaker networks. It offers installers a practical solution for upgrading existing speaker systems or expanding distributed audio installations without replacing compatible low-impedance loudspeakers.
Connect 4Ω and 8Ω Speakers to 70V Audio Systems
The AtlasIED HT87 provides impedance matching between a 70.7V distributed audio line and compatible 4-ohm or 8-ohm loudspeakers.
Commercial paging and background music systems commonly use 70V distribution to connect multiple speakers over long cable runs.
However, many conventional speakers are designed for low-impedance amplifier outputs rather than direct connection to a constant-voltage audio line.
The HT87 allows installers to incorporate compatible low-impedance loudspeakers into a 70.7V system by providing the necessary transformer matching.
This makes it useful for commercial sound system upgrades, speaker replacements, and distributed audio expansion projects.
Selectable 1W, 2W, 4W, and 8W Power Taps
The HT87 includes four selectable primary power taps:
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1 watt
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2 watts
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4 watts
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8 watts
These settings allow installers to select an appropriate power level for each connected speaker.
Lower tap settings are commonly useful for background music and paging applications where moderate speaker output is sufficient.
Higher settings provide additional power for compatible loudspeakers requiring greater sound output.
The transformer supports a maximum rated power of 8 watts.
Proper tap selection helps maintain consistent system performance while keeping the total connected speaker load within the amplifier's rated output capacity.
Audio-Grade Transformer Construction
The AtlasIED HT87 uses audio-grade laminations designed to support dependable audio reproduction in professional distributed sound systems.
Its specified 50Hz–15kHz frequency response (±1dB) provides broad bandwidth for commercial speech and music applications.
With a maximum insertion loss of 1.0dB, the transformer helps minimize audio signal loss while providing the impedance matching required for 70.7V operation.
These characteristics make the HT87 suitable for installations where speech intelligibility and consistent background music reproduction are important.
Compact Design for Commercial Audio Installations
The AtlasIED HT87 features a compact transformer design that can be incorporated into compatible loudspeaker installations.
Measuring approximately 2.375 inches high, 1.969 inches wide, and 1.0625 inches deep, it provides a space-efficient solution for commercial audio applications.
Its compact dimensions make it particularly useful when adapting existing low-impedance speakers for use in distributed audio systems.
Installers should ensure that the transformer is securely mounted and that all electrical connections are appropriately protected for the installation environment.
AtlasIED HT87 Key Features
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High-quality 70.7V line matching transformer
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Designed for commercial distributed speaker systems
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8-watt maximum power rating
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Selectable 1W, 2W, 4W, and 8W primary taps
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Compatible with 4-ohm and 8-ohm loudspeakers
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Audio-grade laminations for reliable sound reproduction
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50Hz–15kHz frequency response (±1dB)
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1.0dB maximum insertion loss
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Compact design for professional installations
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Suitable for commercial paging and background music systems
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Helps integrate conventional low-impedance speakers into 70V networks
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5-year manufacturer's warranty
AtlasIED HT87 Technical Specifications
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Specification
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Details
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Manufacturer
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AtlasIED
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Model
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HT87
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Product Type
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Line Matching Transformer
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Primary Voltage
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70.7V
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Power Rating
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8W
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Selectable Power Taps
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1W, 2W, 4W, 8W
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Secondary Impedance
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4Ω and 8Ω
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Frequency Response
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50Hz–15kHz
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Frequency Response Tolerance
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±1dB
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Maximum Insertion Loss
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1.0dB
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Construction
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Audio-Grade Laminations
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Height
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2.375" (6.0325 cm)
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Width
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1.969" (5.00126 cm)
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Depth
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1.0625" (2.69875 cm)
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Manufacturer Warranty
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60 Months (5 Years) from Date of Purchase
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Recommended Applications
Commercial Paging Systems: Provides transformer matching for compatible low-impedance loudspeakers used in 70.7V paging installations.
Background Music Systems: Supports speaker integration in retail stores, restaurants, offices, and hospitality environments.
Public Address Systems: Allows conventional 4-ohm and 8-ohm speakers to operate within properly designed 70V speaker networks.
Educational Facilities: Suitable for distributed audio installations in classrooms, offices, and institutional buildings.
Speaker System Upgrades: Helps installers adapt existing compatible low-impedance speakers for 70.7V operation.
Commercial Audio Expansion: Provides additional flexibility when adding conventional loudspeakers to existing distributed audio systems.
Need a Higher-Power Line Matching Transformer?
For installations requiring more than 8 watts of speaker power, consider the AtlasIED HT327 High-Power Line Matching Transformer.
The HT327 supports 8W, 16W, and 32W power taps, making it a practical alternative for compatible loudspeakers requiring greater power handling.
Both transformers are designed for 70.7V distributed audio systems and support 4-ohm and 8-ohm speaker loads.
Explore the AtlasIED HT327 High-Power Line Matching Transformer for applications requiring up to 32 watts.
Why Buy the AtlasIED HT87 from Audio Supply?
At Audio Supply, we specialize in professional audio equipment for commercial and distributed sound installations. The AtlasIED HT87 offers reliable 70.7V speaker matching, flexible power taps, and compact construction for paging, background music, and commercial audio systems.
