Overview
Part of Meyer Sound’s cinema series, the X‑400C Compact Cinema Subwoofer boosts low‑frequency headroom in cinema applications and other fixed installations. The linear, self‑powered X‑400C offers similar sonic characteristics to the X‑800C subwoofer— low‑frequencies down to 20 Hz, clean, punchy transients, and excellent phase coherence—in a more compact cabinet that can be installed singly or as multiple units.
The X‑400C comprises a single 18‑inch low‑frequency, long‑excursion cone driver housed in an optimally tuned, vented cabinet and powered by a single‑channel amplifier. On‑board processing includes driver protection circuitry, low‑pass filtering, and correction filters for flat phase and frequency responses.
The Intelligent AC™ power supply provides automatic voltage selection, EMI filtering, soft current turn‑on, and surge suppression.
The X‑400C integrates seamlessly with other cinema loudspeakers, including the Acheron screen channel loudspeakers and HMS surround loudspeakers.
Meyer Sound constructs the X‑400C cabinet of premium multi‑ply birch and coats it with a slightly textured black finish. The cabinet includes attachment points for an optional grille frame covered with black cloth.
Meyer Sound’s optional RMS™ remote monitoring system module facilitates comprehensive monitoring of the loudspeaker parameters from a Mac® or Windows®‑based computer running Compass® control software when used in conjunction with an RMServer™ hardware unit.
Features and Benefits
- High peak power output with excellent transient reproduction
- Extended low frequency response down to 20 Hz
- Extremely low distortion for exceptional low‑frequency clarity
- Exceptionally reliable and durable
- Optional grille frame with black cloth
Applications
- Motion picture theaters
- Residential cinema
- Production and post-production facilities
- Soundtrack recording and mixing
Specifications
|
ACOUSTICAL1 |
|
|
Operating Frequency Range2 |
20 Hz – 200 Hz |
|
Frequency Response3 |
23 Hz – 160 Hz ±4 dB |
|
Phase Response |
32 Hz – 175 Hz ±30° |
|
Linear Peak SPL4 |
127.5 dB with crest factor > 11.5 dB (M-noise), 127.5 dB (Pink noise), 131.5 dB (B‑noise) |
|
COVERAGE |
|
|
Varies with number of units and configuration |
|
|
TRANSDUCERS |
|
|
Low Frequency |
One 18 in long‑excursion cone driver; 4 Ω nominal impedance |
|
AUDIO INPUT |
|
|
Type |
Differential, electronically balanced |
|
Maximum Common Mode Range |
±15 V DC, clamped to earth for voltage transient protection |
|
Connectors |
XLR 3‑pin female input with male loop output |
|
Input Impedance |
10 kΩ differential between pins 2 and 3 |
|
Wiring |
Pin 1: Chassis/earth through 220 kΩ, 1000 pF, 15 V clamp network to provide virtual ground lift at audio frequencies Pin 2: Signal + Pin 3: Signal – Case: Earth ground and chassis |
|
Pad Switch |
Normal position: no effect; Pad position: ‑7.5 dB input pad added to reduce upstream noise when loudspeaker is in close proximity to listeners |
|
Nominal Input Sensitivity |
0 dBV (1.0 V rms) continuous is typically the onset of limiting for noise and music |
|
Input Level |
Audio source must be capable of producing of +20 dBV (10 V rms) into 600 Ω to produce the maximum peak SPL over the operating bandwidth of the loudspeaker. |
|
AMPLIFIER |
|
|
Type |
Single channel |
|
Total Output Power5 |
900 W peak |
|
THD, IM, TIM |
< 0.02% |
|
Cooling |
Convection |
|
AC POWER |
|
|
Connector |
powerCON 20 input with loop output |
|
Automatic Voltage Selection |
90–265 V AC |
|
Safety Rated Voltage Range |
100–240 V AC, 50–60 Hz |
|
Turn‑on and Turn‑off Points |
90 V AC turn‑on, no turn‑off; internal fuse‑protection above 265 V AC |
|
CURRENT DRAW |
|
|
Idle Current |
0.26 A rms (115 V AC); 0.16 A rms (230 V AC); 0.30 A rms (100 V AC) |
|
Maximum Long‑Term Continuous Current (>10 sec) |
1.4 A rms (115 V AC); 0.7 A rms (230 V AC); 1.6 A rms (100 V AC) |
|
Burst Current (<1 sec)6 |
2.7 A rms (115 V AC); 1.1 A rms (230 V AC); 3.0 A rms (100 V AC) |
|
Maximum Instantaneous Peak Current |
9 A peak (115 V AC); 6 A peak (230 V AC); 10 A peak (100 V AC) |
|
Inrush Current |
10 A peak (115 V AC); 8 A peak (230 V AC); 10 A peak (100 V AC) |
|
RMS NETWORK (OPTIONAL) |
|
|
Two‑conductor twisted‑pair network module: reports all operating parameters of amplifiers to system operator’s host computer via the RMServer hardware unit7. |
|
|
PHYSICAL |
|
|
Dimensions |
W: 31.00 in (787 mm) x H: 20.65 in (525 mm) x D: 20.79 in (528 mm) |
|
Weight |
85 lb (38.6 kg) |
|
Enclosure |
Premium multi‑ply birch with slightly textured black finish |
|
Protective Grille |
Optional grille frame with black cloth |
