Used L-Acoustics MTD115b
Used L-Acoustics MTD115b units offer a switch-selectable active/passive, two-way coaxial full range loudspeaker built for distributed sound reinforcement, medium-scale touring, sub-hire and fixed installation. The second-hand MTD115b combines a 15-inch bass reflex-loaded low frequency transducer with a titanium alloy diaphragm compression driver in a single point source coaxial design. Browse the available used listings below to find the right unit for your setup.
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L-Acoustics MTD115b specifications
| Brand | L-Acoustics |
| Segment | Audio |
| Typical used price | $7,144 (range $7,144–$7,144) |
About the L-Acoustics MTD115b
The L-Acoustics MTD115b is a switch-selectable active/passive, two-way coaxial full range loudspeaker designed for distributed sound reinforcement. It houses a direct radiating, bass reflex-loaded 15-inch low frequency transducer paired with a 1.4-inch exit, 3-inch voice coil diameter, titanium alloy diaphragm compression driver. The frequency response runs from 65 Hz to 14 kHz within plus or minus 3 dB, with a usable bandwidth of 50 Hz to 16 kHz at minus 10 dB. Positioned within L-Acoustics MTD line alongside the MTD108a and MTD112b, the MTD115b is intended for medium-scale touring, sub-hire or fixed installation, and works with companion LLC analog line level controllers for plug-and-play versatility. The coaxial configuration delivers single point source radiation, total wavefront coherency and axi-symmetrical directivity.
L-Acoustics MTD115b — buyer FAQs
What is the L-Acoustics MTD115b and what is it designed for?
The L-Acoustics MTD115b is a switch-selectable active/passive, two-way coaxial full range loudspeaker built for distributed sound reinforcement, medium-scale touring, sub-hire and fixed installation. Its coaxial configuration places a 15-inch bass reflex-loaded low frequency transducer and a 1.4-inch exit titanium alloy diaphragm compression driver on a single point source axis, producing axi-symmetrical directivity and total wavefront coherency across the frequency range.
What frequency response does the MTD115b deliver?
The MTD115b covers 65 Hz to 14 kHz within plus or minus 3 dB as a full range system, with a usable bandwidth extending from 50 Hz to 16 kHz at minus 10 dB. That range reflects the pairing of the 15-inch woofer with the 3-inch voice coil, 1.4-inch exit compression driver housed in the same coaxial enclosure.
Where does the MTD115b sit in the L-Acoustics MTD line?
L-Acoustics is a French professional audio manufacturer known for loudspeakers used in touring, festivals and installations. The MTD115b is the largest enclosure in the MTD line, sitting above the passive MTD108a and MTD112b. Unlike those purely passive siblings, the MTD115b adds switchable active operation, making it the most flexible option in the range for engineers who need active/passive versatility in a single box.
What controller does the MTD115b use and how does that affect setup?
The MTD115b is designed to work with L-Acoustics LLC analog line level controllers, which act as companion processors for the MTD line. Using the LLC provides a plug-and-play signal path, removing the need to source a separate third-party controller. The active/passive switch on the MTD115b itself also allows the system to be deployed in different configurations depending on the available amplification on a given job.
What should I check when buying a second-hand MTD115b?
Confirm whether the unit is being used in active or passive mode and that the switchable circuitry functions correctly. Check the condition of the 15-inch transducer and compression driver, as replacements add cost. Ask whether an LLC controller is included, since the MTD115b is designed around that companion unit. Used listings on this page vary by condition and configuration; every 10K Used listing carries a 21-day warranty covering major functional faults, and further detail is in the buying guide at https://www.10kused.com/used-av-equipment-guide/.
