MS1501
Cinema Surround Speaker
Coaxial two-way surround loudspeaker for the side- and rear-wall channels, with a 15-inch coaxial driver and a U-shaped integrated bracket offering horizontal aiming, for side-wall mounting or height-channel suspension. Hall width ≤ 24 m/34 m
Surround channels (including height channels) · Large commercial auditoriums · Dolby Atmos and other immersive-audio auditoriums · Dome cinemas · Large-format screens
Features
- 15-inch coaxial driver and 2.5-inch dome tweeter on one axis, so coverage shape does not change with mounting angle.
- Bass-reflex enclosure 369 mm deep and 23.8 kg; fewer units cover a wide hall.
- 100° × 100° nominal coverage, identical in wall-mount and flown configurations.
- U-shaped one-piece bracket adjusts horizontally; wall-mounted directly or suspended on threaded rods as a height channel.
- Built-in 2.0 kHz passive crossover inside the enclosure, so only one connection point is needed.
- 4 Ω nominal; verify amplifier current capability and cable loss, and confirm fixing capacity before flying.
Overview
The MS1501 is the largest, highest-output coaxial two-way surround loudspeaker in the MS Series, for the side-wall and rear-wall channels of large auditoriums, suitable for wall or ceiling mounting, and for ceiling suspension on threaded rods as a height channel for immersive formats such as Dolby Atmos. It pairs a 15″ coaxial driver with a 2.5″ dome HF section and delivers 52 Hz–20 kHz (±3 dB) and 100° × 100° nominal coverage from a 369 mm deep bass-reflex enclosure.
The 4 Ω nominal impedance governs how many cabinets can share one channel and the cable size required, so amplifier current capability and cable loss must be checked at system design. At 98 dB sensitivity and a 350 W AES 100-hour rating it is the highest-output model in the series, so a wide hall can meet the level with fewer cabinets. The U-shaped bracket provides horizontal aiming for direct side-wall mounting or ceiling suspension; the bass-reflex MDF cabinet carries a PVC laminate finish and weighs 23.8 kg net.
Specifications
| Product Type | Cinema Surround Speaker |
|---|---|
| System Type | Coaxial two-Way, Passive |
| Driver Configuration | 15"coaxial +2.5“ HF dome |
| Nominal Impedance | 4Ω |
| Frequency Response (±3 dB @ 2π)2 | 52 Hz–20 kHz |
| Frequency Range (-10 dB @ 2π)2 | 45 Hz–20 kHz |
| AES 100-Hour Power Rating3 | 350W |
| AES 2-Hour Power Rating | 437.5W |
| Program Power4 | 700W |
| Sensitivity (2π) @1W/1m | 98dB |
| Rated Maximum SPL /1m @ 2π | 123.4dB |
| Calculated Maximum SPL /1m @ 2π5 | 129.4dB |
| Crossover Frequency | 2.0 kHz |
| Recommended HPF | 40 Hz |
| Coverage Angle (H×V) | 100°×100° |
| Enclosure Type | Bass-reflex enclosure |
| Enclosure Material / Finish | MDF · PVC laminate |
| Input Connectors | Binding posts |
| Mounting Options | Wall / ceiling |
| Dimensions W×H×D (mm) | W500 × H584 × D369 mm |
| Net Weight | 23.8 kg |
Frequency response
Dimensions
- 1Two length values are given: the first is the usable range on continuous power, the second on program power. Program power is a short-term maximum output and is not a level the system can sustain continuously. Target levels follow the SMPTE ST 202 / RP 200 cinema reference level: 82 dB for surround plus 20 dB peak headroom; hall width = lateral distance from the loudspeaker to the hall centre axis x 2. Listening distance is derived from free-field distance attenuation. The continuous-power range uses the rated maximum SPL in this table; the program-power range uses the rated value +3 dB (program power being twice the continuous power). The calculated maximum SPL (rated +6 dB, short-term peak) is not used for these figures. Screen loss, power compression, system limiting and room gain are not included - this is a theoretical estimate, not a measured guarantee; on-site verification is recommended. Operating beyond the recommended figure may result in, but is not limited to: dynamic compression, increased distortion, extraneous noise, and in severe cases equipment damage.
- 2Low-frequency response and sensitivity specifications are referenced to half-space (2π) conditions, representative of typical cinema baffle-wall installation. Frequency-response graphs are measured in an anechoic free-field (4π) environment unless otherwise noted. In the low-frequency region the same loudspeaker measures about 6 dB higher under 2π than under 4π (in practice 3–6 dB depending on frequency and baffle conditions); this is a difference of measurement convention, not of performance.
- 3Rating based on an IEC filtered random-noise test signal, band-limited 50 Hz–20 kHz, with a peak-to-average ratio of 6 dB
- 4Recommended amplifier output at the applicable impedance should not exceed the program power, giving an unclipped output waveform while avoiding loudspeaker damage; an amplifier capable of at least the RMS continuous power (AES 100 h) is recommended to realize full loudspeaker performance. The actual amplifier match should be determined by calculation for the listening distance (see note 1).
- 5Calculated maximum SPL is derived from the rated (continuous) power and half-space (2π) sensitivity and is a calculated, not measured, figure; at a 6 dB peak-to-average ratio it exceeds the rated value by 6 dB, representing short-term peak capability rather than a level the system can sustain.
- 6The frequency-response graphs on this page are measured on-axis at 1 W/1 m in an anechoic free-field (4π) environment with 1/6-octave smoothing; the frequency response and sensitivity in the specification table are stated under half-space (2π) conditions. Lower readings in the low-frequency region of the graph therefore reflect the difference in convention rather than a difference in performance. 2π-format curves are available on request.
- 7Passive, single-amplifier-channel enclosure; hall width above derived from its AES 100-hour rating and system sensitivity, with drive-unit-level verification pending.
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