Martin Audio CDD10BTX – 10" 70V/100V Transformer Speaker (Black)

Product Overview

The Martin Audio CDD10BTX is a commercial-grade, transformer-coupled 70V/100V distributed loudspeaker engineered for large-scale zone audio installations where multiple speakers must be daisy-chained across a single constant-voltage amplifier circuit. Built around Martin Audio's proprietary Coaxial Differential Dispersion (CDD) technology, this 10" two-way passive loudspeaker delivers consistent, wide-coverage sound reproduction suited to foreground music and speech reinforcement across varied architectural environments. The integrated 70V/100V line transformer eliminates the need for external transformer boxes, simplifying wiring, reducing rack infrastructure, and enabling efficient multi-zone distributed audio system design. For AV integrators specifying 100V line speaker systems for commercial, hospitality, or institutional projects, the CDD10BTX provides a high-output, architecturally discreet solution with 96dB sensitivity and 120dB continuous SPL capability.

Product Description

The CDD10BTX combines Martin Audio's Coaxial Differential Dispersion driver architecture with an inbuilt constant-voltage transformer, making it a purpose-built 70V/100V distributed loudspeaker for professional commercial audio installations. The coaxial driver places the 1" exit HF compression driver concentrically within the 10" LF cone, producing a point-source radiation pattern that maintains time alignment across the listening area — a critical advantage in reverberant commercial spaces such as convention centers, hotel atriums, and houses of worship.

The user-rotatable coaxial drive unit allows the integrator to orient the dispersion pattern — 110° to 75° horizontal, 60° vertical — to suit either landscape or portrait cabinet orientation without sacrificing high-frequency coverage symmetry. This flexibility significantly reduces the number of speaker positions required to achieve uniform SPL across a zone, lowering installation labor and material costs.

Transformer tapping points at 120W, 60W, 30W, and 15W (on a 110V/70V line) via Phoenix connector give the system designer precise control over per-speaker power draw, enabling accurate load calculations for the constant-voltage amplifier. The 8Ω nominal impedance is also retained for direct-drive operation, making the CDD10BTX compatible with both 70V/100V distributed audio amplifiers and conventional low-impedance systems.

The UPM Formi composite enclosure resists humidity and temperature variation common in challenging installation environments, while the screw-free perforated steel grille with scrim cloth backing provides a clean, maintenance-friendly finish. With six M8 inserts for wall bracket mounting and ten M8 fly points for suspension, the CDD10BTX accommodates the full range of commercial installation rigging methods. For related Martin Audio products and complete system solutions, visit the Martin Audio collection at Creation Networks.

Key Features

• Coaxial Differential Dispersion (CDD) Technology — Point-source driver alignment maintains time-coherent coverage and consistent tonal balance throughout the listening zone.
• Integrated 70V/100V Line Transformer — Onboard constant-voltage transformer enables direct connection to distributed audio amplifiers without external transformer modules.
• Selectable Transformer Taps (120W / 60W / 30W / 15W) — Phoenix connector tapping points allow precise power allocation per speaker for accurate system load balancing.
• User-Rotatable Coaxial Drive Unit — Field-adjustable HF dispersion axis accommodates both vertical and horizontal cabinet orientations.
• 96dB Sensitivity / 120dB Continuous SPL — High-efficiency driver delivers high output with lower amplifier power demand, suitable for large-venue zone audio.
• Dual-Mode Operation (70V/100V and 8Ω) — Compatible with constant-voltage distributed systems and conventional low-impedance amplifier outputs.
• UPM Formi Composite Enclosure — Lightweight, dimensionally stable composite material suited to permanent commercial installations.
• Multiple Rigging Options — Six M8 wall bracket inserts and ten M8 fly points support wall, ceiling, and suspension mounting configurations.
• Screw-Free Perforated Steel Grille — Tool-free grille removal simplifies driver inspection and service access.
• Wide Frequency Response — 65Hz–20kHz (±3dB) with 2kHz passive crossover delivers full-range foreground audio reproduction.

Typical Applications

• House of worship main and fill zone coverage
• Convention center and exhibition hall distributed audio
• Hotel lobby, ballroom, and multi-zone background/foreground audio
• Multi-purpose room and auditorium zone reinforcement
• Commercial meeting space and all-hands room audio
• Training room and conference room speech reinforcement
• Government and institutional facility audio systems
• Museum and cultural AV space foreground audio

Technical Specifications

Frequently Asked Questions

How does the 70V/100V transformer tapping work on the CDD10BTX?

The CDD10BTX includes an internal constant-voltage transformer with selectable taps at 120W, 60W, 30W, and 15W, accessed via a Phoenix connector. The system designer selects the tap corresponding to the desired power draw per speaker, then calculates the total load by summing all tapped values across the circuit — this total must not exceed the amplifier's rated output on the 70V or 100V line. Lower tap settings reduce per-speaker power while allowing more speakers per amplifier channel.

Can the CDD10BTX be used with a standard 8Ω amplifier instead of a 70V/100V system?

Yes. The CDD10BTX retains its 8Ω nominal impedance and can be operated directly from a conventional low-impedance amplifier without engaging the transformer circuit. This dual-mode capability makes the speaker compatible with both distributed constant-voltage architectures and traditional low-impedance zone amplifiers.

What amplifiers are compatible with this speaker?

Any commercial-grade 70V or 100V constant-voltage amplifier is compatible, provided the total tapped load across the circuit does not exceed the amplifier's rated output. The CDD10BTX should be used with a compatible controller incorporating appropriate limiter settings to protect the driver. For 8Ω direct-drive use, any professional or commercial amplifier rated for the speaker's 250W AES / 1000W peak power handling is appropriate.

Can I mix CDD10BTX speakers with 8Ω speakers on the same 70V/100V circuit?

You can include both transformer-equipped and direct 8Ω speakers on a distributed system, but 8Ω speakers require their own transformer modules to connect to a constant-voltage line. It is generally recommended to keep the 70V/100V circuit consistent with transformer-coupled speakers to simplify load calculations and system documentation.

What makes CDD (Coaxial Differential Dispersion) technology beneficial in commercial installations?

CDD places the high-frequency compression driver coaxially within the low-frequency cone, creating a single acoustic point source. This eliminates the vertical interference lobing that occurs with separated driver configurations, producing more consistent frequency response and tonal balance across the coverage zone — particularly important in reverberant commercial spaces where off-axis coloration compounds intelligibility problems. The user-rotatable drive unit allows the dispersion pattern to be oriented to the room geometry without repositioning the cabinet.

What installation accessories are included or available?

The CDD10BTX includes six M8 inserts for wall bracket mounting and ten M8 fly points for eyebolt suspension. Discreet mounting accessories are available separately from Martin Audio. The screw-free perforated steel grille simplifies access for installation adjustments post-mounting.

Is the CDD10BTX suitable for outdoor or high-humidity environments?

The CDD10BTX is designed for permanent indoor commercial installation. The UPM Formi composite enclosure provides greater dimensional stability than MDF in varying humidity conditions, but the speaker is not rated for outdoor or exposed wet environments. For outdoor distributed audio applications, consult weatherized speaker options in the Martin Audio range at Creation Networks.

What warranty does the Martin Audio CDD10BTX carry?

Martin Audio products are backed by a manufacturer warranty covering defects in materials and workmanship. Contact Creation Networks at creationnetworks.net for warranty registration details and authorized service information specific to your region and installation.