{"product_id":"p-sb11-anc-spirit-box-sb11-with-adjustable-noise-control","title":"P-SB11-ANC Spirit Box - SB11 with Adjustable Noise Control","description":"\u003cp\u003eIn this review of the P-SB11-ANC Spirit Box the bottom line is straightforward: this deluxe SB11 is aimed at serious users who want cleaner, more controllable scanning audio for investigative or experimental listening. The reviewer found the standout advantage to be the \u003cstrong\u003eAdjustable Noise Control\u003c\/strong\u003e, which noticeably reduces scan noise and makes possible phrases easier to separate from static. It keeps the essential dual channel SB11 behavior while adding tactile + and - controls for noise level on each AM and FM channel, so users who value clarity and tweakability will appreciate the update.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eANC Adjustable Noise Control:\u003c\/strong\u003e lets the user reduce unwanted background noise during station sweeps so potential messages are more distinct.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual Channel Sweep:\u003c\/strong\u003e FM and AM channels can be scanned simultaneously so overlapping signals can be compared in real time.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdjustable Scanning Speed:\u003c\/strong\u003e each channel has independent sweep speed settings so timing and cadence can be matched to the listener's preference.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDirection Control per Channel:\u003c\/strong\u003e both FM and AM channels are scannable forward or backward, giving more options when trying to elicit responses.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eATDD Temperature Alerts:\u003c\/strong\u003e Automatic Temperature Deviation Detection warns of roughly 5F temperature changes that may be relevant during a session.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBattery Powered:\u003c\/strong\u003e runs from a standard 9V alkaline battery for easy field use without needing mains power.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThe P-SB11-ANC is best for experienced users and field investigators who already understand dual channel spirit box operation and want finer control over noise and sweep parameters. The added ANC and separate noise controls for each channel make it a good pick for sessions in noisy environments where separating signals matters.\u003c\/p\u003e\n\u003cp\u003eLess technical users who prefer a plug-and-play, minimal-control device might find the multiple knobs and direction\/speed options more complicated than necessary. Those who require rechargeable or mains-powered gear should look elsewhere because this unit is designed around a single 9V alkaline battery power source.\u003c\/p\u003e\n\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAdjustable Noise Control dramatically reduces unwanted noise during scans for clearer audio.\u003c\/li\u003e\n\u003cli\u003eIndependent FM and AM sweeping with adjustable speed and direction gives flexible investigative options.\u003c\/li\u003e\n\u003cli\u003eATDD temperature deviation alerts add a useful environmental cue during sessions.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eRuns on a single 9V alkaline battery, so continuous long sessions require spare batteries.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003eP-SB11-ANC Spirit Box\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eSpirit Box\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNoise Control\u003c\/td\u003e\n\u003ctd\u003eAdjustable Noise Control (ANC) with + and - buttons per channel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChannels\u003c\/td\u003e\n\u003ctd\u003eDual Channel Sweep: FM and AM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eScan Controls\u003c\/td\u003e\n\u003ctd\u003eAdjustable sweep speed per channel; forward or backward scanning\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEnvironment Alert\u003c\/td\u003e\n\u003ctd\u003eATDD Automatic Temperature Deviation Detection (~5F change)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Source\u003c\/td\u003e\n\u003ctd\u003e9V Alkaline Battery\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe P-SB11-ANC is a worthwhile upgrade for anyone who used the original SB11 and wants cleaner, more controllable audio during sweeps. With independent noise control, sweep speed and direction for each channel plus temperature alerts, it brings practical improvements without changing the core SB11 workflow, making it good value for focused investigators and hobbyists who need better signal separation.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eDoes the ANC require special setup?\u003c\/strong\u003e\u003cbr\u003eThe ANC works out of the box with preset levels, and the user can fine tune noise using the + and - buttons on the back for each channel.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan FM and AM be scanned at the same time?\u003c\/strong\u003e\u003cbr\u003eYes, both channels can be scanned simultaneously and each channel's sweep speed and direction are set independently.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat powers the device?\u003c\/strong\u003e\u003cbr\u003eThe unit runs from a single 9V alkaline battery for portable use; spare batteries are recommended for extended sessions.\u003c\/p\u003e","brand":"Spirit Box","offers":[{"title":"Default Title","offer_id":48259927441627,"sku":"B09DRP8PLV","price":189.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/61X0lJwKQ_L._AC_SL1500.jpg?v=1778290526","url":"https:\/\/gearmusthave.com\/products\/p-sb11-anc-spirit-box-sb11-with-adjustable-noise-control","provider":"GearMustHave","version":"1.0","type":"link"}