Sounds blown, makes a rattling sound when in use.

Product highlightsfrequency response: 22-140 Hz (-6 dB) built-in Class D amplifier delivers 300 watts RMS of continuous power custom-designed 12 woofer acoustic suspension (sealed) cabinet design iBX (Intelligent Bass Extension) digital signal processing provides deep, dynamic bass at any listening level 3 placement presets (free-standing, in-cabinet, or corner) let you choose your subs location for optimal bass performance variable low-pass crossover (40-140 Hz) phase control switch (0°/180°) line-level/LFE RCA inputs main power on/off switch plus auto standby/on mode detachable power cord 15-1/2W x 16-1/8H x 16-1/8D weight: 45.5 lbs. warranty: 5 years woofer, 2 years amplifier Whats in the boxPowered subwoofer 6.5 AC power cord Speaker-level input block User Manual Important Safety Information Warranty Information About this itemWritten by Crutchfields Kramer CraneDeep, accurate bass from KEF Dont tell my wife, but when I have the house to myself I like to watch movies really loudly. And a large part of what makes that such a rush for me is the visceral feel of bass as it sweeps through my living room during intense scenes. Talk about thrilling! KEFs KUBE 12b powered subwoofer has this exact goal in mind: provide deep, hard-hitting bass that puts you right in the heart of the action. Intelligently designed components The KUBE 12b is outfitted with a custom-designed 12 woofer, and a powerful 300-watt RMS amplifier. KEF designs and builds all of their components in-house to make sure that both the quality and audio performance are up to the companys high standards. Use this sub with confidence as part of your home theater or stereo music system, even in large rooms. Built-in sound controls On the back panel youll find a simple-but-useful input and control panel. My favorite feature? You can choose from three placement presets (free-standing, in-cabinet, or corner) to dial in the sound based on where the sub is located in your room. Get the most out of your new sub Once you get your sub home, check out our tips for placement and setup. Free lifetime Virginia-based tech support is included with your purchase.

KEF Kube12b Kube 12 300W Powered Home Theater Subwoofer (Black) Functional Condition: Lightly used, works and sounds great! Whats Included: SubwooferPower cordManual Cosmetic Condition: Subwoofer has a few light scratches from handling, but nothing major. Subwoofer is in good shape and works great! See pictures.- Payment and Shipping - - Return Policy - Payment: We accept cash, credit card (for local pickup), and PayPal. After the auction ends, you will be sent an invoice through eBay. Please respond to this invoice with your intentions and payment method. After 2 days if we do not hear from you, a non-paying bidder alert will be filed on eBay. Shipping: Shipping with UPS: Shipping is determined by buyer’s ZIP code. Please enter your Zip code in the box above where it says Calculate Shipping and press the Calculate button to determine your shipping cost.We do NOT ship to AK, HI, and PR. We do NOT ship to P.O. Box!All orders of $250 or more will require in-person signature delivery confirmation.Shipping with USPS: Shipping is determined by buyer’s ZIP code. Please enter your Zip code in the box above where it says Calculate Shipping and press the Calculate button to determine your shipping cost. SPECIAL NOTE FOR INTERNATIONAL CUSTOMERS: SHIPPING VIA UPS & USPS WILL RESULT IN CUSTOM & BROKERAGE FEES WHICH YOU WILL BE RESPONSIBLE FOR. WE CAN NOT LABEL ANY PACKAGES AS GIFT NOR FALSIFY THE ACTUAL COST OF THE PRODUCTLocal Pickups: Shipping charges are waived for in-store pickups.Your purchase of the above item comes with a 30-day warranty from date of purchase. If the item you purchase arrives DOA, stops functioning properly within the warranty period, or is significantly different than the one described, you can contact us with your intention to return it within 30 days of receiving it. After we receive the item we will refund your purchase amount.If you wish to return your item for any reason other than the ones stated above (DOA, broken, not as described), a restocking fee (see your listing for details) will be deducted from the refund to cover processing fees and re-stocking costs. Shipping is not refunded.After 30 days, all sales are final.Any return MUST be sent back in the packaging it was received in, and include ALL accessories, cables, Remotes, Software, etc. the item(s) came with. We record all serial numbers, on items that have them, and these must match upon return. - About Us - Thank you for visiting LADA AB LLC eBay Store located in Columbus OH. Since 2007 LADA AB LLC is committed to offering good-quality and low-cost items. Our primary mission is your satisfaction with our products and service. We try our best to ensure utmost customer satisfaction. Feel free to contact us 24/7 Thru eBay contact seller button above! - Feedback - - Customer Service - We do not believe in negative feedback, so please contact us before leaving any if unsatisfied with the transaction, and we will do our best to resolve the problem in way in which each party will be satisfied. If you are satisfied with your purchase, please leave positive feedback. PLEASE use eBay messages for communication, do not send emails. eBay messages are checked frequently and a response will be given ASAP.

ELECTRO CITY TRADING CONDITIONUsed works great. Sub has scraches on top (SEE PICTURES). Sub has marks around the sides. Missing the original packaging. The sub has a small hole in the fabric from the front (SEE PICTURES.Items are tested and 100% functional, Some may have minor signs of handling. We only ship to the 48 lower states. Returns will NOT be accepted if serial numbers do not match. A restocking fee of 20% will be deducted from refund for ALL items returned for any reason other than DOA (Dead On Arrival) We don’t ship Saturday and Sunday, Please allow 1-2 business days for questions to be answered. Please contact us if you have any problems with the item. We ship items within a couple of hours from the purchase. We appreciate your positive feedback. Thank You All

Der KEF Kube 12b ist ein gebrauchter Subwoofer mit einer beeindruckenden Leistung. Mit seiner Marke KEF ist er bekannt für seinen klaren, tiefen und präzisen Sound. Der Subwoofer ist ideal für Heim-Audio & HiFi Anwendungen geeignet und bietet einen unglaublichen Klang. Dieser Subwoofer ist perfekt für diejenigen, die eine hohe Klangqualität suchen und ein begrenztes Budget haben. Der KEF Kube 12b bietet eine hervorragende Balance für Musik und Filme und ist einfach zu bedienen. Mit diesem Subwoofer können Sie Ihr Zuhause in ein Kino verwandeln und ein wahres Audio-Erlebnis genießen. Der Sub wurde in Mai 2022 gekauft, und fast nie Benutzt. Mein Lautsprecher haben eigentlich genug Bass, und deswegen es war eher unötig. Gern zum abholen, kann aber auch verschickt werden

Used KEF - Kube 12 300W Powered Subwoofer - Black (kube 12b) voloum knob brokencrossover knob brokenone RCA terminla broken. not tested, no idea if it still works. sell for repairing or for parts. ------------------------------------------------------ ------------------------------------------------------

KEF - Kube 12 300W Powered Subwoofer - Black [KUBE12B] . Unit is in great working condition. Description KEF cube 12B subwoofer Features & details The KUBE 12b is a 300W 12 front-firing, sealed box powered subwoofer whose output is powerful as much as it is musical. Each KUBE comes with 3 pre-programmed custom EQ settings - free standing, corner, and wall and in-cabinet installations - to best suit the setup of your room. Customize your KUBE even further by adjusting the gain, phase, low pass filter, and crossovers to your liking and listening habits. The KUBE 12b subwoofer features KEF Smart Compression limiting, which allows the subwoofer to play louder and remain dynamic and effortlessly musical. Enjoy KEF Smart Connect, which automatically detects whether an LFE or stereo input is connected and adjusts subwoofers volume level accordingly.

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Subwoofer is in excellent condition with minor signs of use. Comes in the original box with power cord and manual.

Seems like a power issue, the volume dips back and forth and the power light pulses a bit, but it does output clear sound just not at a consistent volume. Also, when it dips it makes a bit of a weird noise.selling as is for parts or repairLike New cosmetic condition, includes sub only, no cable