MB Quart - Formula Series 6" x 9" 2-Way Car Speakers with Polypropylene Cones (Pair) - Black
Price range: $45–89.99
Brand: MB Quart
Category: Audio
A pair of MB Quart headphones featuring 6" x 9" drivers, 46 Hz–20 kHz frequency response, and 4Ω impedance.
PQS: 100 (computed 2026-04-28 07:03)
GTIN-14: 00806576228394
Key specs
A human-friendly subset of populated specs
Driver
6" x 9"
Frequency response
46 hertz - 20 kilohertz
Impedance (ohms)
4
Wireless (BT/WiFi)
No
Offers
| Retailer | SKU | Price | Stock | Offer | Last seen |
|---|---|---|---|---|---|
| Best Buy | 6507884 | 89.99 USD | In stock | View offer → | 2026-04-28 02:44 |
| Newegg | 9SIA8PT7V22034 | 45.00 USD | In stock | View offer → | 2026-04-21 02:12 |
Recent price history (50)
Show price log (50 entries)
| Retailer | Price | Stock | Seen at |
|---|---|---|---|
| bestbuy | 89.99 USD | In stock | 2026-04-28 02:44 |
| bestbuy | 89.99 USD | In stock | 2026-04-26 02:44 |
| bestbuy | 89.99 USD | In stock | 2026-04-25 02:41 |
| bestbuy | 89.99 USD | In stock | 2026-04-24 02:33 |
| bestbuy | 89.99 USD | In stock | 2026-04-23 02:36 |
| bestbuy | 89.99 USD | In stock | 2026-04-22 02:38 |
| bestbuy | 89.99 USD | In stock | 2026-04-21 02:41 |
| newegg | 45.00 USD | In stock | 2026-04-21 02:12 |
| bestbuy | 89.99 USD | In stock | 2026-04-20 02:45 |
| newegg | 45.00 USD | In stock | 2026-04-20 02:20 |
| bestbuy | 89.99 USD | In stock | 2026-04-19 02:37 |
| newegg | 45.00 USD | In stock | 2026-04-19 02:24 |
| bestbuy | 89.99 USD | In stock | 2026-04-18 02:40 |
| newegg | 45.00 USD | In stock | 2026-04-18 02:23 |
| bestbuy | 89.99 USD | In stock | 2026-04-17 02:45 |
| newegg | 45.00 USD | In stock | 2026-04-17 02:25 |
| newegg | 45.00 USD | In stock | 2026-04-16 13:29 |
| bestbuy | 89.99 USD | In stock | 2026-04-16 02:41 |
| newegg | 45.00 USD | In stock | 2026-04-16 02:15 |
| bestbuy | 89.99 USD | In stock | 2026-04-15 02:42 |
| newegg | 45.00 USD | In stock | 2026-04-15 02:21 |
| bestbuy | 89.99 USD | In stock | 2026-04-14 02:34 |
| newegg | 45.00 USD | In stock | 2026-04-14 02:16 |
| bestbuy | 89.99 USD | In stock | 2026-04-13 02:36 |
| newegg | 45.00 USD | In stock | 2026-04-13 02:26 |
| bestbuy | 89.99 USD | In stock | 2026-04-12 02:44 |
| newegg | 45.00 USD | In stock | 2026-04-12 02:25 |
| bestbuy | 89.99 USD | In stock | 2026-04-11 02:42 |
| newegg | 45.00 USD | In stock | 2026-04-11 02:20 |
| bestbuy | 89.99 USD | In stock | 2026-04-10 02:39 |
| newegg | 45.00 USD | In stock | 2026-04-10 02:27 |
| bestbuy | 89.99 USD | In stock | 2026-04-09 02:43 |
| newegg | 45.00 USD | In stock | 2026-04-09 02:12 |
| bestbuy | 89.99 USD | In stock | 2026-04-08 02:39 |
| newegg | 45.00 USD | In stock | 2026-04-08 02:28 |
| newegg | 45.00 USD | In stock | 2026-04-07 02:21 |
| newegg | 45.00 USD | In stock | 2026-04-06 02:23 |
| bestbuy | 89.99 USD | In stock | 2026-04-05 02:42 |
| newegg | 45.00 USD | In stock | 2026-04-05 02:17 |
| bestbuy | 89.99 USD | In stock | 2026-04-04 02:41 |
| newegg | 45.00 USD | In stock | 2026-04-04 02:13 |
| bestbuy | 89.99 USD | In stock | 2026-04-03 02:38 |
| newegg | 45.00 USD | In stock | 2026-04-03 02:20 |
| bestbuy | 89.99 USD | In stock | 2026-04-02 02:40 |
| newegg | 45.00 USD | In stock | 2026-04-02 02:16 |
| bestbuy | 89.99 USD | In stock | 2026-04-01 02:39 |
| newegg | 45.00 USD | In stock | 2026-04-01 02:22 |
| bestbuy | 89.99 USD | In stock | 2026-03-31 02:50 |
| newegg | 45.00 USD | In stock | 2026-03-31 02:19 |
| bestbuy | 89.99 USD | In stock | 2026-03-30 02:36 |
Full specs
Show full spec table
| Driver | 6" x 9" |
|---|---|
| Frequency response | 46 hertz - 20 kilohertz |
| Impedance (ohms) | 4 |
| Wireless (BT/WiFi) | No |
| Reconciled at | 2026-03-18 02:22 |
Canonical JSON (expand)
{
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"title": "MB Quart - Formula Series 6\" x 9\" 2-Way Car Speakers with Polypropylene Cones (Pair) - Black",
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"driver": "6\" x 9\"",
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"impedance_ohms": 4,
"frequency_response": "46 hertz - 20 kilohertz"
},
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"extra": {},
"model": "FKB169",
"ports": {},
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"category": "audio",
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"physical": {
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"weight_kg": 2.47,
"dimensions_in": "5.5 x 11.75 x 14.25 in"
},
"thermals": {},
"warranty": {
"labor": "1 Year",
"parts": "1 Year"
},
"wearable": {},
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Related products
Simple similarity over extracted specs (publish_set only)
Debug data (expand)
| Raw title | MB Quart - Formula Series 6" x 9" 2-Way Car Speakers with Polypropylene Cones (Pair) - Black |
|---|---|
| Raw brand | MB Quart |
| Raw category | Best Buy > Car Electronics & GPS > Car Audio > Car Speakers |
Canonical highlights (populated fields only)
| core.title | MB Quart - Formula Series 6" x 9" 2-Way Car Speakers with Polypropylene Cones (Pair) - Black |
|---|---|
| core.seo_title | MB Quart FKB169 |
| audio.driver | 6" x 9" |
| audio.wireless | No |
| audio.impedance_ohms | 4 |
| audio.frequency_response | 46 hertz - 20 kilohertz |
| brand | MB Quart |
| model | FKB169 |
| gtin14 | 00806576228394 |
| images[0] | https://pisces.bbystatic.com/prescaled/500/500/image2/BestBuy_US/images/products/6507/6507884_sd.jpg |
| category | audio |
| physical.depth_in | 14.25 |
| physical.width_in | 11.75 |
| physical.height_in | 5.5 |
| physical.weight_kg | 2.47 |
| physical.dimensions_in | 5.5 x 11.75 x 14.25 in |
| warranty.labor | 1 Year |
| warranty.parts | 1 Year |
| schema_version | 1 |
BestBuy raw specs (pretty)
Expand BestBuy raw JSON
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"name": "MB Quart - Formula Series 6\" x 9\" 2-Way Car Speakers with Polypropylene Cones (Pair) - Black",
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{
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"value": "Black",
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{
"name": "RMS Power",
"value": "75 watts",
"values": [
"75 watts"
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},
{
"name": "Peak Power Handling",
"value": "150 watts",
"values": [
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{
"name": "Minimum Frequency Response",
"value": "46 hertz",
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"value": "4 ohms",
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{
"name": "Sensitivity",
"value": "88 decibels",
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{
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"value": "Yes",
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"value": "6\" x 9\"",
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"value": "Aluminum",
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"value": "3.35 inches",
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"features": [
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"feature": "Handles up to 150W maximum power\nProvides rich sound."
},
{
"feature": "46Hz - 20kHz frequency response\nAccurately produces a wide range of sound."
},
{
"feature": "Lightweight thermal-formed polypropylene cones\nDeliver impactful bass with minimal cone flex."
},
{
"feature": "1\" aluminum dome tweeter\nOffers natural-sounding high-frequency response, while the WideSphere technology allows the tweeter to develop a wider listening area for off-axis listening."
},
{
"feature": "4-ohm impedance\nConducts power evenly to keep the speaker at the appropriate level."
},
{
"feature": "8.64\" x 5.98\" cutout dimensions\nThe shallow basket depth makes installation easier."
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"condition": "New",
"salePrice": 89.99,
"categoryPath": [
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"manufacturer": "MB Quart",
"regularPrice": 89.99,
"shippingCost": "",
"longDescription": "Enjoy high-quality sound in your car with these 75W MB Quart Formula two-way coaxial car speakers. The butyl rubber surrounds are durable and boost bass sounds, while the aluminum dome tweeters enhance high-frequency sound reproduction. These 6x9-inch MB Quart Formula two-way coaxial car speakers boast 6dB internal crossovers for smooth frequency transitions, and the heavy-gauge steel frame provides sturdy support.",
"shortDescription": null,
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}
Newegg raw specs
raw_specs_text (pretty) — expand
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