Martin Audio Adorn A40TB – 4" On-Wall Speaker with 70/100V Transformer, Black Pair

Product Overview

The Martin Audio Adorn A40TB is a two-way passive on-wall loudspeaker with a built-in 70V/100V line transformer, designed for distributed audio and background music systems in commercial installations. Sold as a pair in black finish, it delivers 109dB peak SPL from a compact enclosure and integrates directly into constant-voltage distributed audio systems without the need for an external line transformer. The A40TB is well suited to retail, hospitality, corporate, and educational environments requiring 70V/100V system compatibility in a discreet wall-mounted form factor.

Product Description

The Adorn A40TB extends the standard A40 on-wall platform with an integrated 70V/100V multi-tap line transformer, making it the preferred choice for large-zone distributed audio installations where constant-voltage wiring is the design standard. This eliminates the need for external per-speaker transformers, simplifying both wiring design and installation labour. Push-terminal connectors further streamline field termination.

Driver complement includes a 4" (100mm) LF driver and a 0.75" (19mm) silk-dome HF driver on a 110° x 80° horn, producing 109dB peak SPL at 1 metre and 87dB/1W/1m sensitivity. A 3.5kHz passive crossover with auto-resetting fuses on both driver sections provides full-bandwidth overload protection. The enclosure is UL94V-0 rated ABS and the wall bracket supports vertical or horizontal mounting. The A40TB provides a matched sonic character with larger Martin Audio systems such as CDD or BlacklineX, facilitating consistent audio quality in multi-zoned complexes. Explore the full Adorn range at Creation Networks – Martin Audio.

Key Features

• Integrated 70V/100V Line Transformer — Eliminates external per-speaker transformers in constant-voltage distributed audio installations.
• Multi-Tap Power Selection — 70V taps: 20W/10W/5W/2.5W; 100V taps: 20W/10W/5W for flexible zone level control.
• 109dB Peak SPL — High output for commercial ambient-noise environments.
• Two-Way Horn-Loaded Design — 4" LF driver with 0.75" silk-dome HF on a 110° x 80° horn.
• 87dB/1W/1m Sensitivity — Efficient performance from moderate amplifier power.
• 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 orientations.
• UL94V-0 Rated ABS Enclosure — Commercial fire compliance.
• Martin Audio Signature Sound — Consistent sonic character with CDD and BlacklineX systems for multi-zone deployments.
• 5-Year Warranty — Martin Audio manufacturer warranty.

Typical Applications

• Retail outlet 70V/100V background music distributed audio
• Hotel corridor and public area constant-voltage audio systems
• Corporate office multi-zone distributed audio
• House of worship background music systems
• Government space and educational facility distributed audio
• Restaurant and hospitality background music installations

Technical Specifications

Frequently Asked Questions

What is the difference between the A40TB and the A40B?

The A40TB has a built-in 70V/100V line transformer for direct connection to constant-voltage distributed audio systems. The A40B operates at 16 ohms for low-impedance amplifier connection. Both are acoustically identical.

What transformer taps are available on the A40TB?

The A40TB provides 70V taps at 20W, 10W, 5W, and 2.5W, and 100V taps at 20W, 10W, and 5W. Tap selection allows per-speaker level adjustment in distributed audio zones.

What amplifier does Martin Audio recommend for the A40TB?

Martin Audio recommends the VIA5002 amplifier in conjunction with a suitable line transformer for 70V/100V operation.

Can the A40TB be mixed with other Martin Audio systems in a multi-zone installation?

Yes. The A40TB shares Martin Audio’s signature sound characteristic, enabling consistent audio quality across multi-zone installations that also use CDD or BlacklineX systems.

Does the A40TB come with a wall bracket?

Yes. A wall bracket enabling both vertical and horizontal mounting is included.

What warranty does the A40TB carry?

Martin Audio provides a 5-year manufacturer warranty on the A40TB.