Home Audio MartinLogan Motion XT Series CI, Retro-Fit Backbox Enclosure fo…

MartinLogan - Motion XT Series CI, Retro-Fit Backbox Enclosure for MC8 and XTC8 - Black/Silver

Price range: $55
Brand: MartinLogan
Category: Audio
A pair of MartinLogan headphones.
PQS: 80 (computed 2026-03-18 07:12:03.396442+00:00)
GTIN-14: 00810123025718
MartinLogan - Motion XT Series CI, Retro-Fit Backbox Enclosure for MC8 and XTC8 - Black/Silver

Key specs

A human-friendly subset of specs (non-null)
Wireless (BT/WiFi)
No

Offers

Retailer SKU Price Stock Offer Last seen
Best Buy 6457013 55.0 USD In stock View offer → 2026-03-18 02:28:44.148136+00:00

Recent price history (50)

Retailer Price Stock Seen at
bestbuy 55.0 USD In stock 2026-03-18 02:28:44.148136+00:00
bestbuy 55.0 USD In stock 2026-03-17 02:31:29.354396+00:00
bestbuy 55.0 USD In stock 2026-03-16 02:30:07.519139+00:00
bestbuy 55.0 USD In stock 2026-03-15 02:17:52.345450+00:00
bestbuy 55.0 USD In stock 2026-03-14 02:21:34.973289+00:00
bestbuy 55.0 USD In stock 2026-03-13 02:30:33.371446+00:00
bestbuy 55.0 USD In stock 2026-03-12 02:23:12.685237+00:00
bestbuy 55.0 USD In stock 2026-03-11 02:20:31.156585+00:00
bestbuy 55.0 USD In stock 2026-03-10 02:31:16.870486+00:00
bestbuy 55.0 USD In stock 2026-03-09 02:29:24.869136+00:00
bestbuy 55.0 USD In stock 2026-03-06 05:57:58.706182+00:00
bestbuy 55.0 USD In stock 2026-03-03 01:48:28.297769+00:00
bestbuy 55.0 USD In stock 2026-03-02 07:41:04.729738+00:00

Full specs

Show full spec table
Wireless (BT/WiFi)No
Reconciled at2026-03-06 10:20:22.157613+00:00
Canonical JSON (expand)
{
  "os": {
    "name": null
  },
  "car": {
    "type": null,
    "finish": null,
    "din_type": null,
    "included": null,
    "material": null,
    "compatibility": null,
    "included_trim": null,
    "included_screws": null,
    "included_harness": null,
    "included_adapters": null,
    "included_brackets": null,
    "compatibility_make": null,
    "compatibility_model": null,
    "compatibility_years": null,
    "included_connectors": null,
    "included_instructions": null,
    "retains_factory_features": null
  },
  "cpu": {
    "cores": null,
    "tdp_w": null,
    "socket": null,
    "threads": null,
    "npu_tops": null,
    "cpu_model": null,
    "lithography": null,
    "base_clock_ghz": null,
    "boost_clock_ghz": null
  },
  "gpu": {
    "tdp_w": null,
    "chipset": null,
    "outputs": null,
    "vram_gb": null,
    "gpu_type": null,
    "gpu_model": null,
    "vram_type": null,
    "base_clock_mhz": null,
    "boost_clock_mhz": null
  },
  "core": {
    "title": "MartinLogan - Motion XT Series CI, Retro-Fit Backbox Enclosure for MC8 and XTC8 - Black/Silver",
    "seo_title": "MartinLogan C8BXR"
  },
  "lens": {
    "mount": null,
    "weight": null,
    "focal_length": null,
    "max_aperture": null,
    "stabilization": null
  },
  "audio": {
    "driver": null,
    "wireless": "No",
    "technology": null,
    "impedance_ohms": null,
    "speakers_count": 8,
    "wireless_codecs": null,
    "hi_res_certified": null,
    "frequency_response": null
  },
  "brand": "MartinLogan",
  "build": {
    "screen_glass": null,
    "chassis_material": null
  },
  "color": null,
  "extra": null,
  "model": "C8BXR",
  "ports": {
    "hdmi": null,
    "usb_a": null,
    "usb_c": null,
    "sd_card": null,
    "summary": null,
    "ethernet": null,
    "sim_slot": null,
    "displayport": null,
    "thunderbolt": null,
    "headphone_jack": null
  },
  "power": {
    "psu_watts": null
  },
  "camera": {
    "mount": null,
    "sensor": null,
    "weight": null,
    "iso_range": null,
    "megapixels": null,
    "rear_megapixels": null,
    "front_megapixels": null,
    "video_resolution": null,
    "windows_hello_ir": null
  },
  "gtin14": "00810123025718",
  "images": [
    "https://pisces.bbystatic.com/prescaled/500/500/image2/BestBuy_US/images/products/6457/6457013_sd.jpg"
  ],
  "memory": {
    "ram_gb": null,
    "channels": null,
    "ram_type": null,
    "speed_mhz": null
  },
  "series": null,
  "battery": {
    "life_hours": null,
    "capacity_wh": null,
    "capacity_mah": null
  },
  "display": {
    "panel_type": null,
    "resolution": null,
    "color_gamut": null,
    "hdr_formats": null,
    "touch_screen": null,
    "screen_size_in": null,
    "brightness_nits": null,
    "refresh_rate_hz": null,
    "response_time_ms": null,
    "pantone_validated": null
  },
  "release": {
    "year": null
  },
  "storage": {
    "interface": null,
    "nand_type": null,
    "read_speed": null,
    "capacity_gb": null,
    "form_factor": null,
    "write_speed": null,
    "endurance_tbw": null,
    "storage_capacity_gb": null
  },
  "category": "audio",
  "features": {
    "webcam": null,
    "windows_ai": null,
    "form_factor": null,
    "software_perks": null,
    "backlit_keyboard": null,
    "convertible_2in1": null,
    "fingerprint_reader": null
  },
  "physical": {
    "depth_in": 5.78,
    "width_in": 9.25,
    "height_in": 9.25,
    "weight_kg": 0.61,
    "dimensions_in": "9.25 x 9.25 x 5.78 in"
  },
  "thermals": {
    "cooling_type": null,
    "thermal_interface": null
  },
  "warranty": {
    "labor": null,
    "parts": null
  },
  "wearable": {
    "ecg": null,
    "gps": null,
    "spo2": null,
    "skin_temp": null,
    "heart_rate": null,
    "display_type": null,
    "nfc_payments": null,
    "compatibility": null,
    "music_storage": null,
    "sleep_tracking": null,
    "display_size_in": null,
    "battery_life_days": null,
    "stress_monitoring": null,
    "smart_notifications": null,
    "workout_modes_count": null,
    "water_resistance_atm": null
  },
  "appliance": {
    "btu": null,
    "eer": null,
    "ceer": null,
    "type": null,
    "modes": null,
    "smart": null,
    "steam": null,
    "zones": null,
    "finish": null,
    "air_fry": null,
    "burners": null,
    "voltage": null,
    "inverter": null,
    "noise_db": null,
    "fuel_type": null,
    "ice_maker": null,
    "wattage_w": null,
    "convection": null,
    "depth_type": null,
    "door_alarm": null,
    "fan_speeds": null,
    "frost_free": null,
    "rack_count": null,
    "sensor_dry": null,
    "third_rack": null,
    "airflow_cfm": null,
    "energy_star": null,
    "filter_type": null,
    "glide_racks": null,
    "soil_sensor": null,
    "broiler_type": null,
    "cycles_count": null,
    "defrost_type": null,
    "garage_ready": null,
    "tub_material": null,
    "venting_type": null,
    "air_direction": null,
    "baskets_count": null,
    "capacity_cuft": null,
    "cleaning_type": null,
    "drum_material": null,
    "drying_system": null,
    "energy_rating": null,
    "lighting_type": null,
    "mounting_type": null,
    "shelves_count": null,
    "cooling_system": null,
    "dimensions_hwd": null,
    "interior_light": null,
    "place_settings": null,
    "room_size_sqft": null,
    "sanitize_cycle": null,
    "sensor_cooking": null,
    "shelf_material": null,
    "spin_speed_rpm": null,
    "turntable_size": null,
    "bottle_capacity": null,
    "convection_type": null,
    "water_dispenser": null,
    "interior_coating": null,
    "annual_energy_kwh": null,
    "cutout_dimensions": null,
    "humidity_crispers": null,
    "temperature_range": null,
    "wash_cycles_count": null,
    "oven_capacity_cuft": null,
    "water_level_control": null,
    "agitator_or_impeller": null,
    "capacity_fridge_cuft": null,
    "daily_production_lbs": null,
    "independent_controls": null,
    "capacity_freezer_cuft": null,
    "lower_oven_capacity_cuft": null,
    "upper_oven_capacity_cuft": null
  },
  "networking": {
    "ports": null,
    "cellular": null,
    "band_count": null,
    "throughput": null,
    "wifi_standard": null,
    "ethernet_ports": null
  },
  "peripheral": {
    "dpi": null,
    "rgb": null,
    "platform": null,
    "driver_mm": null,
    "vibration": null,
    "microphone": null,
    "sensor_type": null,
    "switch_type": null,
    "connectivity": null
  },
  "smart_home": {
    "learning": null,
    "resolution": null,
    "connectivity": null,
    "night_vision": null,
    "power_source": null,
    "compatibility": null,
    "chime_included": null
  },
  "certifications": {
    "energy_star": null,
    "epeat_level": null
  },
  "schema_version": 1
}
Debug data (expand)
Raw title MartinLogan - Motion XT Series CI, Retro-Fit Backbox Enclosure for MC8 and XTC8 - Black/Silver
Raw brandMartinLogan
Raw categoryBest Buy > Home Audio & Speakers > Home Audio > Speakers > In-Wall & In-Ceiling Speakers > In-Ceiling Speakers
Canonical highlights (non-null)
core.title MartinLogan - Motion XT Series CI, Retro-Fit Backbox Enclosure for MC8 and XTC8 - Black/Silver
core.seo_title MartinLogan C8BXR
audio.wireless No
audio.speakers_count 8
brand MartinLogan
model C8BXR
gtin14 00810123025718
images[0] https://pisces.bbystatic.com/prescaled/500/500/image2/BestBuy_US/images/products/6457/6457013_sd.jpg
category audio
physical.depth_in 5.78
physical.width_in 9.25
physical.height_in 9.25
physical.weight_kg 0.61
physical.dimensions_in 9.25 x 9.25 x 5.78 in
schema_version 1
BestBuy raw specs (pretty)
Expand BestBuy raw JSON
{
  "sku": 6457013,
  "upc": "810123025718",
  "url": "https://api.bestbuy.com/click/-/6457013/pdp",
  "name": "MartinLogan - Motion XT Series CI, Retro-Fit Backbox Enclosure for MC8 and XTC8 - Black/Silver",
  "image": "https://pisces.bbystatic.com/prescaled/500/500/image2/BestBuy_US/images/products/6457/6457013_sd.jpg",
  "details": [
    {
      "name": "Brand",
      "value": "MartinLogan",
      "values": [
        "MartinLogan"
      ]
    },
    {
      "name": "Model Number",
      "value": "C8BXR",
      "values": [
        "C8BXR"
      ]
    },
    {
      "name": "Product Name",
      "value": "Motion XT Series CI, Retro-Fit Backbox Enclosure for MC8 and XTC8",
      "values": [
        "Motion XT Series CI, Retro-Fit Backbox Enclosure for MC8 and XTC8"
      ]
    },
    {
      "name": "Color",
      "value": "Black/Silver",
      "values": [
        "Black/Silver"
      ]
    },
    {
      "name": "Speaker Type",
      "value": "In-Ceiling",
      "values": [
        "In-Ceiling"
      ]
    },
    {
      "name": "Number of Speakers",
      "value": "1",
      "values": [
        "1"
      ]
    },
    {
      "name": "Speaker Connectivity",
      "value": "Wired",
      "values": [
        "Wired"
      ]
    },
    {
      "name": "Wireless Multi-Room Audio",
      "value": "No",
      "values": [
        "No"
      ]
    },
    {
      "name": "Audio Only Inputs",
      "value": "No audio only inputs",
      "values": [
        "No audio only inputs"
      ]
    },
    {
      "name": "Network Connector(s)",
      "value": "No network connectors",
      "values": [
        "No network connectors"
      ]
    },
    {
      "name": "Speaker Wire Connection Type",
      "value": "No speaker connections",
      "values": [
        "No speaker connections"
      ]
    },
    {
      "name": "Indoor Or Outdoor Use",
      "value": "Indoor",
      "values": [
        "Indoor"
      ]
    },
    {
      "name": "Product Height",
      "value": "9.25 inches",
      "values": [
        "9.25 inches"
      ]
    },
    {
      "name": "Product Width",
      "value": "9.25 inches",
      "values": [
        "9.25 inches"
      ]
    },
    {
      "name": "Product Depth",
      "value": "5.78 inches",
      "values": [
        "5.78 inches"
      ]
    },
    {
      "name": "Product Weight",
      "value": "1.35 pounds",
      "values": [
        "1.35 pounds"
      ]
    },
    {
      "name": "Mounting Dimensions",
      "value": "9.25 Cut out diameter",
      "values": [
        "9.25 Cut out diameter"
      ]
    },
    {
      "name": "Warranty - Parts",
      "value": "1 year",
      "values": [
        "1 year"
      ]
    },
    {
      "name": "Warranty - Labor",
      "value": "1 year",
      "values": [
        "1 year"
      ]
    }
  ],
  "features": [
    {
      "feature": "Model Compatibility\nThe C8BXR is compatible with the following MartinLogan speaker models: MC8 and XTC8"
    }
  ],
  "condition": "New",
  "salePrice": 55.0,
  "categoryPath": [
    {
      "id": "cat00000",
      "name": "Best Buy"
    },
    {
      "id": "abcat0200000",
      "name": "Home Audio & Speakers"
    },
    {
      "id": "pcmcat241600050001",
      "name": "Home Audio"
    },
    {
      "id": "abcat0205000",
      "name": "Speakers"
    },
    {
      "id": "pcmcat210900050000",
      "name": "In-Wall & In-Ceiling Speakers"
    },
    {
      "id": "pcmcat210900050001",
      "name": "In-Ceiling Speakers"
    }
  ],
  "manufacturer": "MartinLogan",
  "regularPrice": 55.0,
  "shippingCost": 0.0,
  "longDescription": "One of the benefits of in-ceiling speakers is how easily they disappear into a room. Unfortunately, the sound coming from the back of the speaker doesn’t disappear and can distract those in the rooms above the speakers. MartinLogan offers back boxes, or enclosures, for Motion CI and Motion XT CI In-ceiling speakers. For these situations where sound control is desired, these retrofittable back boxes are the perfect solution. They offer 20dB of noise reduction into adjacent areas and offer the perfect solution to achieve consistent performance where ceiling cavity sizes may vary throughout an installation. Please note that the volume of air in the retrofit enclosure is smaller than that of your ceiling, and bass extension will be reduced. If sound control is not necessary for your unique installation, we recommend not using the back box so the speaker can take advantage of the larger airspace in your ceiling cavity.",
  "shortDescription": null,
  "onlineAvailability": true,
  "inStoreAvailability": true
}
Newegg raw specs
No Newegg raw specs saved for this product yet.