Martin Audio Adorn A55TB – 5.25" On-Wall Speaker with 70/100V Transformer, Black Pair

Product Overview

The Martin Audio Adorn A55TB is a two-way passive on-wall loudspeaker with an integrated 70V/100V line transformer, engineered for distributed audio and background music systems in commercial installations. Sold as a pair in black finish, it delivers 113dB peak SPL from a compact enclosure and connects directly to constant-voltage distributed audio lines. The A55TB is a strong choice for retail, hospitality, corporate, and convention centre environments that require high-output 70V/100V system compatibility from a discreet wall-mounted loudspeaker.

Product Description

The Adorn A55TB combines the 5.25" two-way driver platform of the A55 series with an integrated 70V/100V multi-tap line transformer, producing 113dB peak SPL at 1 metre with 90dB/1W/1m sensitivity — the highest sensitivity figure in the Adorn on-wall range. This makes the A55TB especially efficient in large distributed audio zones where maximising SPL per watt of amplifier power is a design priority.

Driver complement includes a 5.25" (135mm) LF driver and a 0.75" (19mm) silk-dome HF driver on a 110° x 80° horn, with a 3.5kHz passive crossover and auto-resetting thermal fuses on both driver sections. The front-ported bass reflex enclosure extends bass response to 65Hz (-10dB), delivering strong low-frequency output for foreground music applications. Push-terminal connectors facilitate clean field termination in distributed audio wiring layouts. The A55TB provides consistent sonic character with Martin Audio CDD and BlacklineX systems, enabling quality-matched multi-zone installations. View the full Adorn range at Creation Networks – Martin Audio.

Key Features

• Integrated 70V/100V Line Transformer — Direct constant-voltage system connection without external transformer hardware.
• 113dB Peak SPL — Highest output in the Adorn on-wall range for high-ambient-noise commercial environments.
• 90dB/1W/1m Sensitivity — Most efficient model in the Adorn on-wall series for large-zone distributed audio.
• Two-Way Horn-Loaded Design — 5.25" LF driver with 0.75" silk-dome HF on a 110° x 80° horn.
• 65Hz Low-Frequency Extension — Suitable for foreground music applications without supplemental subwoofer.
• Multi-Tap Power Selection — Flexible per-speaker level adjustment via transformer taps for zone balancing.
• 3.5kHz Passive Crossover with Auto-Resetting Fuses — Independent LF and HF overload protection.
• Push-Terminal Connectors — Simplified field wiring for distributed audio installations.
• Vertical or Horizontal Mounting — Included wall bracket supports both installation orientations.
• UL94V-0 Rated ABS Enclosure — Commercial fire compliance.
• 5-Year Warranty — Martin Audio manufacturer warranty.

Typical Applications

• Retail outlet 70V/100V background and foreground music systems
• Hotel lobby, corridor, and public area constant-voltage audio
• Corporate office and all-hands room multi-zone distributed audio
• House of worship background music and speech reinforcement
• Convention centre and commercial meeting space BGM systems
• Restaurant, bar, and hospitality foreground music installations

Technical Specifications

Frequently Asked Questions

What is the difference between the A55TB and the A55B?

The A55TB has a built-in 70V/100V line transformer for direct connection to constant-voltage distributed audio systems. The A55B operates at 16 ohms for low-impedance amplifier connection. Both are acoustically identical in driver complement and coverage pattern.

What transformer taps are available?

Transformer tap power levels are not individually listed in Martin Audio’s published A55TB specification — consult the Martin Audio data sheet for the full tap table. General tap ranges follow the Adorn series convention of multiple power steps for 70V and 100V operation.

Why does the A55TB have higher sensitivity than the A40TB?

The larger 5.25" driver and horn configuration in the A55TB produces 90dB/1W/1m sensitivity versus 87dB for the A40TB, making the A55TB the more efficient choice for large distributed audio zones with high SPL targets.

What amplifier does Martin Audio recommend for the A55TB?

Martin Audio recommends the VIA2004 four-channel Class D amplifier for the A55TB.

Can the A55TB be mixed with CDD loudspeakers in a multi-zone installation?

Yes. The A55TB is designed to share Martin Audio’s signature sound characteristic, enabling consistent audio quality across multi-zone installations that include CDD or BlacklineX systems.

What warranty does the A55TB carry?

Martin Audio provides a 5-year manufacturer warranty on the A55TB.