Yamaha S115MT PA Speakers, 15″ 3-Way, 400W, Made in USA

Yamaha S115MT PA Speakers, 15″ 3-Way, 400W, Made in USA

The Yamaha S115MT is a professional-grade, 3-way passive PA speaker built in the USA, designed for live sound, studio monitoring, and fixed installations where clarity, power handling, and road-worthy durability are essential. With a massive 15-inch woofer, 6.5-inch midrange driver, and compression driver with horn tweeter, the S115MT delivers full-range sound with exceptional projection and low-end authority—genuine bass extension that likely reaches well below the 55Hz specification thanks to the substantial woofer and ported cabinet design. Rated at 400 watts maximum power handling, this speaker provides headroom for high-SPL applications without strain. Each speaker features an adjustable HF frequency dial on the rear panel for precise tweeter level control, allowing fine-tuning to match room acoustics or personal preference. This pair has been thoroughly tested and verified fully functional across all drivers; the woofers, midrange, and horn all respond cleanly with no distortion, cone rub, or audible issues. Cosmetic condition is excellent—genuinely pristine for professional audio gear, with clean reinforced corners (which normally take the brunt of road wear) and heavy-duty metal mesh grills in perfect shape.

The S115MT’s 3-way configuration separates low, mid, and high frequencies across dedicated drivers, allowing each to operate within its optimal range without strain. The 15-inch woofer handles bass and low-midrange frequencies with controlled excursion and low distortion, providing punch, warmth, and genuine low-end extension that gives these speakers surprising authority for their size. The 6.5-inch midrange driver covers the critical vocal and instrument range with clarity and detail, ensuring speech intelligibility and presence that cuts through live mixes. The compression driver paired with a horn delivers clear, articulate treble with wide dispersion and excellent throw. The rear-panel HF attenuator allows precise tweeter level adjustment, making it easy to dial in the perfect tonal balance for any room or application—a professional feature that reflects Yamaha’s commitment to versatility and user control.

The cabinet is constructed from robust plywood with integrated recessed carrying handles for easy transport and positioning. The rectangular box design maximizes internal volume for bass extension while remaining manageable for one-person carry. Heavy-duty metal mesh grills protect the drivers from damage during transport and setup, yet remain acoustically transparent for uncolored sound. Dual 1/4-inch input jacks on the rear panel provide flexible connectivity with standard speaker cables, and the 8-ohm impedance ensures compatibility with most professional and home audio amplifiers. At 33.1 kg (73 lbs) per speaker, the S115MT is substantial but manageable, reflecting genuine quality construction: solid plywood cabinet, robust internal bracing, quality drivers, and a passive crossover designed for long-term reliability under high SPL conditions.

Made in the USA and bearing Yamaha’s reputation for professional build quality, the S115MT represents an era when American manufacturing produced genuinely durable, serviceable gear designed for decades of use. These speakers are equally at home as main PA speakers for small-to-medium venues, floor monitors for performers on stage, or high-quality home audio monitors for audiophiles and musicians who appreciate professional-grade sound reinforcement with true full-range capability.

Key Features & Specifications

Professional 3-way passive PA speaker

Made in USA

15-inch woofer for deep bass extension and authority

6.5-inch midrange driver for vocal clarity and presence

Compression driver with horn tweeter for articulate treble projection

Adjustable HF frequency dial (rear panel) for precise tweeter level control

Frequency response: 55Hz to 16kHz

Power handling: 400W maximum, 8Ω impedance

Dual 1/4-inch input jacks on rear panel

Rectangular cabinet design with maximum internal volume for bass extension

Integrated recessed carrying handles for easy transport

Heavy-duty metal mesh grills (dent-resistant, acoustically transparent)

Robust plywood cabinet construction with internal bracing

Reinforced corners in excellent condition (rare for road-worn PA gear)

Grills in perfect shape with no dents or damage

Thoroughly tested and verified fully functional; all drivers clean and responsive

Excellent cosmetic condition—genuinely pristine for professional audio gear

Dimensions & Weight

Dimensions (Width × Height × Depth): 56 × 71 × 37 cm (22 × 28 × 14.5 inches)

Weight: 33.1 kg (73 lbs) per speaker

At 73 pounds per speaker, the S115MT reflects professional-grade American construction with substantial cabinet bracing, quality drivers, and a passive crossover built to withstand high SPL and demanding live sound environments.

The Yamaha S115MT is a reliable, versatile PA speaker that serves equally well as a main PA for small-to-medium venues, a floor monitor for performers on stage, or high-quality home audio monitors for audiophiles and musicians seeking professional-grade sound reinforcement with genuine full-range capability. Made in the USA with proven Yamaha reliability and in genuinely pristine condition with clean corners and perfect grills, this pair is ready for decades more of reliable service. The included 1/4″ to female banana plug adapters expand compatibility to standard home audio amplifiers, making these speakers accessible to both professional and home audio enthusiasts.

Optional 1/4″ to female banana plug adapters for home audio amplification compatibility for an additional $30

Backed by Radique Audio’s 90-day warranty and our perpetual trade-back policy, you can purchase with confidence.

Asking $395