MC308
Cinema Surround Speaker
Three-way coaxial surround loudspeaker for the side- and rear-wall channels, with an 8-inch coaxial mid-high section and a ribbon super-tweeter on a common axis, radiating laterally across the seating area, with aim-adjustable wall mounting and height-channel suspension. Hall width ≤ 9 m/12 m
Surround channels (including height channels) · Small to medium commercial auditoriums · Private cinemas
Features
- 8-inch coaxial mid/high driver and 1.5-inch dome tweeter on one axis, spreading energy laterally along the side and rear walls.
- One additional ribbon super-tweeter carries the ultra-high band, extending HF response to 25 kHz.
- 100° × 100° nominal coverage, identical in wall-mount and flown configurations.
- 2.5 kHz / 4.5 kHz passive crossover inside the enclosure, so only one connection point is needed.
- U-shaped one-piece bracket adjusts horizontally; wall-mounted directly or suspended on threaded rods as a height channel.
- 8 Ω nominal; one amplifier channel per enclosure, same-side units paralleled or series-paralleled; 10 kg, 290 mm deep.
Overview
The MC308 is a three-way coaxial surround loudspeaker in the MC Series for the side-wall and rear-wall surround channels of commercial 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 combines an 8″ coaxial mid-high driver, a 1.5″ dome HF section and one ribbon super-tweeter, delivering 60 Hz–25 kHz (±3 dB) and 100° × 100° nominal coverage from a 290 mm deep bass-reflex enclosure.
Mid and high frequencies radiate from the coaxial unit on a single axis, with the ribbon super-tweeter carrying the upper band. The 8 Ω nominal load suits conventional amplifier channels; 92 dB sensitivity and a 170 W AES 100-hour rating define its output capability. The U-shaped integrated bracket provides horizontal aiming for direct side-wall mounting or ceiling suspension; the bass-reflex MDF cabinet carries a textured paint finish and weighs 10 kg net.
Specifications
| Product Type | Cinema Surround Speaker |
|---|---|
| System Type | Coaxial three-Way, Passive |
| Driver Configuration | 8"coaxial +1.5“ HF dome + Ribbon UHF × 1 |
| Nominal Impedance | 8Ω |
| Frequency Response (±3 dB @ 2π)2 | 60 Hz–25 kHz |
| Frequency Range (-10 dB @ 2π)2 | 51 Hz–25 kHz |
| AES 100-Hour Power Rating3 | 170W |
| AES 2-Hour Power Rating | 212.5W |
| Program Power4 | 340W |
| Sensitivity (2π) @1W/1m | 92dB |
| Rated Maximum SPL /1m @ 2π | 114.3dB |
| Calculated Maximum SPL /1m @ 2π5 | 120.3dB |
| Crossover Frequency | 2.5 kHz 4.5 kHz |
| Recommended HPF | 50 Hz |
| Coverage Angle (H×V) | 100°×100° |
| Enclosure Type | Bass-reflex enclosure |
| Enclosure Material / Finish | MDF · Textured paint |
| Input Connectors | Binding posts |
| Mounting Options | Wall / ceiling |
| Dimensions W×H×D (mm) | W349 × H424 × D290 mm |
| Net Weight | 10 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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