JBL
JBL MTC-CBT-70T
Best transformer module for integrating professional column speakers into distributed systems.
The JBL MTC-CBT-70T is a bolt-on transformer module designed to adapt CBT 70J-1 and CBT 70JE-1 speakers for use on distributed loudspeaker lines. This module enables long cable runs and allows multiple speakers to be driven from a single amplifier channel. It features transformer taps for 120W, 60W, and 30W on 70V and 100V distributed lines, with an additional 15W tap for 70V only. Connections are made via customer-supplied cable to screw-down terminals within the enclosure. The module includes two gland nuts for a watertight seal, suitable for round jacketed cables between 4.0 mm and 9.0 mm in diameter. Mounting is facilitated by two 6 mm screws that attach to the CBT 70J-1 or CBT 70JE-1 cabinet.
$191.00
Owner Satisfaction
4.5
/ 5
Category Rank
139
/ 359
#139 in Speaker Components & Kits
Price vs Category Average
+15%
Above average
Transformer Taps
12060301570
/ W, W, W (and W at V only)
Who it's for
- Commercial integrators building large-scale distributed audio systems
- Audiophiles maintaining high-fidelity sound in high-voltage installations
- Professional installers seeking efficient and streamlined mounting processes
Who should skip it
- Buyers looking for a standalone, universal audio component
- Budget-conscious planners avoiding extra hardware costs
- Users operating standard low-impedance audio setups
Performance breakdown
Signal Integrity
Minimal insertion loss ensures high-fidelity audio across long cable runs.
Environmental Durability
IP-55 rating provides robust protection against moisture and salt spray.
Installation Versatility
Multiple transformer taps offer flexible power distribution for diverse venue needs.
Build Quality
Rugged construction meets UL safety standards for reliable long-term operation.
Integration Ease
Bolt-on design simplifies the upgrade process for existing CBT speaker systems.
Weatherproofing
Gland nuts create a secure, watertight seal for demanding outdoor environments.
Key Specs
Transformer Taps
120W, 60W, 30W (and 15W at 70V only)
Connection
CE-compliant barrier strip terminals
Maximum Insertion Loss
Less than 1 dB at any tap
Gland Nuts
Two total for watertight seal
Mounting
Two 6 mm screws for CBT 70J-1 or CBT 70JE-1 cabinet
Environmental
IP-55 rated, UV, moisture and salt-spray resistant
Agency Rating
UL registered per UL1876
Included Accessories
Two 6 mm bolts, flat washers and lock washers
Features
- Adapts CBT 70J-1 and CBT 70JE-1 for distributed speaker lines.
- Enables long cable runs and driving multiple speakers from a single amplifier channel.
- Offers multiple transformer taps (120W, 60W, 30W for 70V/100V, 15W for 70V).
- Provides a watertight seal with gland nuts for outdoor or demanding environments.
- IP-55 rated for resistance to UV, moisture, and salt spray.
- UL registered transformer for safety and reliability.
What customers say
Customers consistently praise the JBL MTC CBT 70T for its robust build quality and seamless integration into existing JBL CBT 70J and 70JE speaker systems. Users appreciate how straightforward the installation process is, allowing for efficient setup in distributed audio environments. Its reliable performance in 70V/100V applications ensures consistent sound delivery, making it a trusted component for professional audio installations. The product is seen as a high quality, dependable solution that enhances system flexibility without complication.
Know before you buy
This transformer module is specifically designed for the JBL CBT 70J-1 and CBT 70JE-1 column speakers. It bolts directly onto these cabinets to allow for integration into distributed audio systems.
Yes, the MTC-CBT-70T is IP-55 rated, meaning it is built to withstand moisture, UV exposure, and salt spray. It includes two gland nuts to ensure a watertight seal for your cabling.
The module offers 120W, 60W, and 30W taps for both 70V and 100V lines. An additional 15W tap is available exclusively for 70V distributed lines.
The included gland nuts are designed for round, jacketed cables with a diameter between 4.0 mm and 9.0 mm. Using cable within this range is necessary to maintain the unit's watertight seal.
Installation is straightforward and requires basic tools to secure the two 6 mm mounting screws provided with the kit. Connections are made via a standard barrier strip terminal inside the enclosure.
The MTC-CBT-70T is engineered for high-fidelity performance with a maximum insertion loss of less than 1 dB at any tap. This ensures that your audio quality remains consistent even when running long cable lengths.
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