{"product_id":"monitor-audio-radius-1-4g-bookshelf-speakers","title":"Monitor Audio Radius 1 4G Bookshelf Speakers","description":"\u003cbody\u003e\n\n\n\u003cmeta charset=\"UTF-8\"\u003e\n\u003ctitle\u003eMonitor Audio Radius 1 4G Bookshelf Speakers — Product Description\u003c\/title\u003e\n\n\n\u003cdiv style=\"max-width:720px;margin:0 auto;padding:32px 24px 48px 24px;background:#ffffff;\"\u003e\n\n\u003ch2 style=\"font-size:1.25em;margin:0 0 0.35em 0;font-weight:600;\"\u003eReal Hi-Fi in a Five-Inch Cube\u003c\/h2\u003e\n\u003cp style=\"margin:0 0 0.9em 0;line-height:1.55;\"\u003eThe Monitor Audio Radius 1 4G is the smallest speaker Monitor Audio makes, and it is nearly a cube: 135 x 135 x 156 mm, about 5.3 by 5.3 by 6.1 inches, at 1.8 kg each. It will sit on a desk, a shelf, a bracket or a stand without announcing itself.\u003c\/p\u003e\n\u003cp style=\"margin:0 0 0.9em 0;line-height:1.55;\"\u003eInside is a 4-inch C-CAM RST III bass-mid driver and a fully vented 19 mm C-CAM Gold Dome tweeter, crossing over at 3.2 kHz. In-room response runs from 100 Hz to 35 kHz, with a maximum peak SPL of 104 dB. Sensitivity is 82 dB and nominal impedance is 8 ohms, dipping to 3.8 ohms at 950 Hz. Finishes are high gloss black and satin white, and they are sold as a pair.\u003c\/p\u003e\n\u003cp style=\"margin:0 0 0.9em 0;line-height:1.55;\"\u003eMonitor Audio launched the Radius Series 4G in June 2026, redesigning a range that has run since 2004. The Radius 1 is the entry point, below the larger Radius 3 4G.\u003c\/p\u003e\n\n\u003ch2 style=\"font-size:1.25em;margin:1.4em 0 0.35em 0;font-weight:600;\"\u003eSealed, Not Ported, and That Is the Point\u003c\/h2\u003e\n\u003cp style=\"margin:0 0 0.9em 0;line-height:1.55;\"\u003eHere is the spec that separates this one from the rest of the range: the Radius 1 4G is a sealed box. No port, no tuning frequency, nothing to chuff or to fight a nearby wall. A sealed cabinet this small gives up bass extension, which is why response stops at 100 Hz, but what it keeps is control. Bass starts and stops when the signal does, and placement gets far more forgiving.\u003c\/p\u003e\n\u003cp style=\"margin:0 0 0.9em 0;line-height:1.55;\"\u003eThe drivers are the same family used across the 4G range. C-CAM is Ceramic-Coated Aluminium\/Magnesium, and RST III cone geometry adds a ribbed surface that pushes breakup out of the audible band. The 19 mm Gold Dome tweeter is fully vented and driven by an external magnet motor. Through-bolt bracing locks the driver to the rear panel under a set torque, which matters in a cabinet this small.\u003c\/p\u003e\n\n\u003ch2 style=\"font-size:1.25em;margin:1.4em 0 0.35em 0;font-weight:600;\"\u003eWho Is This Compact Speaker Best For?\u003c\/h2\u003e\n\u003cul style=\"margin:0 0 0.9em 0;padding-left:1.4em;line-height:1.6;\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eSurround and height channels\u003c\/strong\u003e — Small, sealed and easy to mount is exactly what rear channels want.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDesktops and near-field setups\u003c\/strong\u003e — A cube this size leaves room for a monitor, a keyboard and an amp.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMulti-room and second systems\u003c\/strong\u003e — Bedroom, kitchen, office: places where a standmount is too much speaker.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAnyone tight on placement options\u003c\/strong\u003e — With no port, you can put these near a wall without the bass turning to mud.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNot your best pick as the main pair in a large room\u003c\/strong\u003e — Response stops at 100 Hz and sensitivity is 82 dB. For a primary music system, step up to the Radius 3 4G or another of our \u003ca href=\"https:\/\/www.audioadvisor.com\/products\/%%GLOBAL_ShopPathSSL%%\/speakers\/bookshelf-speakers\/\" style=\"color:#8a5a2b;\"\u003ebookshelf speakers\u003c\/a\u003e.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2 style=\"font-size:1.25em;margin:1.4em 0 0.35em 0;font-weight:600;\"\u003eHow Does It Connect to Your System?\u003c\/h2\u003e\n\u003cp style=\"margin:0 0 0.9em 0;line-height:1.55;\"\u003eThese are passive speakers, so they need an amplifier or AV receiver. Monitor Audio recommends 25 to 50 W into 8 ohms, or 50 to 100 W into 4 ohms. At 82 dB, sensitivity is low even for a small speaker, so aim for the top of that range.\u003c\/p\u003e\n\u003cp style=\"margin:0 0 0.9em 0;line-height:1.55;\"\u003eMounting is where the Radius 1 earns its keep. Monitor Audio lists both the MASM and FIX-M brackets as compatible, and the Radius Floor Stand 4G and Desk Pad 4G fit as well, all sold separately. In a home theater, set your receiver crossover at 100 Hz or a little above. Place them, aim them, and let the sub carry the bottom.\u003c\/p\u003e\n\n\u003ch2 style=\"font-size:1.25em;margin:1.4em 0 0.35em 0;font-weight:600;\"\u003ePairs Well With\u003c\/h2\u003e\n\u003cp style=\"margin:0 0 0.9em 0;line-height:1.55;\"\u003eHere is what usually goes around them.\u003c\/p\u003e\n\u003cul style=\"margin:0 0 0.9em 0;padding-left:1.4em;line-height:1.6;\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eSubwoofers\u003c\/strong\u003e — Not optional with a 100 Hz roll-off. Browse our \u003ca href=\"https:\/\/www.audioadvisor.com\/products\/%%GLOBAL_ShopPathSSL%%\/subwoofers\/subwoofers\/\" style=\"color:#8a5a2b;\"\u003esubwoofers\u003c\/a\u003e.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAV receivers\u003c\/strong\u003e — Bass management and room correction matter more here than usual. See our \u003ca href=\"https:\/\/www.audioadvisor.com\/products\/%%GLOBAL_ShopPathSSL%%\/receivers\/av-receivers\/\" style=\"color:#8a5a2b;\"\u003eAV receivers\u003c\/a\u003e.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntegrated amplifiers\u003c\/strong\u003e — For a two-channel desk or bedroom system. See our \u003ca href=\"https:\/\/www.audioadvisor.com\/products\/%%GLOBAL_ShopPathSSL%%\/amplifiers-preamplifiers\/integrated-amplifiers\/\" style=\"color:#8a5a2b;\"\u003eintegrated amplifiers\u003c\/a\u003e.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpeaker stands\u003c\/strong\u003e — Getting a small speaker to ear height changes more than any cable will. See our \u003ca href=\"https:\/\/www.audioadvisor.com\/products\/%%GLOBAL_ShopPathSSL%%\/furniture\/speaker-stands\/\" style=\"color:#8a5a2b;\"\u003espeaker stands\u003c\/a\u003e.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2 style=\"font-size:1.25em;margin:1.4em 0 0.35em 0;font-weight:600;\"\u003eFrequently Asked Questions\u003c\/h2\u003e\n\n\u003ch3 style=\"font-size:1.05em;margin:0.9em 0 0.25em 0;font-weight:600;\"\u003eAre the Radius 1 4G sold as a pair?\u003c\/h3\u003e\n\u003cp style=\"margin:0 0 0.9em 0;line-height:1.55;\"\u003eYes. Each speaker weighs 1.8 kg, just under 4 pounds.\u003c\/p\u003e\n\n\u003ch3 style=\"font-size:1.05em;margin:0.9em 0 0.25em 0;font-weight:600;\"\u003eIs the Radius 1 4G ported or sealed?\u003c\/h3\u003e\n\u003cp style=\"margin:0 0 0.9em 0;line-height:1.55;\"\u003eSealed. Monitor Audio lists no port or tuning frequency here, unlike the ported Radius 3 4G and On Wall 4G.\u003c\/p\u003e\n\n\u003ch3 style=\"font-size:1.05em;margin:0.9em 0 0.25em 0;font-weight:600;\"\u003eDo I need a subwoofer?\u003c\/h3\u003e\n\u003cp style=\"margin:0 0 0.9em 0;line-height:1.55;\"\u003eFor most uses, yes. In-room response is rated to 100 Hz, and Monitor Audio recommends adding a subwoofer for full-range performance.\u003c\/p\u003e\n\n\u003ch3 style=\"font-size:1.05em;margin:0.9em 0 0.25em 0;font-weight:600;\"\u003eCan they be wall mounted?\u003c\/h3\u003e\n\u003cp style=\"margin:0 0 0.9em 0;line-height:1.55;\"\u003eYes. Monitor Audio lists the MASM and FIX-M brackets as compatible, both sold separately.\u003c\/p\u003e\n\n\u003ch3 style=\"font-size:1.05em;margin:0.9em 0 0.25em 0;font-weight:600;\"\u003eHow much amplifier power do they need?\u003c\/h3\u003e\n\u003cp style=\"margin:0 0 0.9em 0;line-height:1.55;\"\u003eMonitor Audio recommends 25 to 50 W into 8 ohms. Continuous handling is 50 W, and sensitivity is 82 dB, so lean toward more power.\u003c\/p\u003e\n\n\u003ch2 style=\"font-size:1.25em;margin:1.4em 0 0.35em 0;font-weight:600;\"\u003eSee It in Action\u003c\/h2\u003e\n\u003cp style=\"margin:0 0 0.5em 0;line-height:1.55;\"\u003eMonitor Audio’s channel introduces the whole Radius Series 4G, Radius 1 included.\u003c\/p\u003e\n\u003ciframe width=\"100%\" height=\"360\" src=\"https:\/\/www.youtube.com\/embed\/hrlPvGJDWoU\" title=\"Radius Series 4G | Monitor Audio\" style=\"border:0;margin:0 0 0.9em 0;display:block;\" allowfullscreen\u003e\u003c\/iframe\u003e\n\u003cp style=\"margin:0 0 0.5em 0;line-height:1.55;\"\u003eMonitor Audio also unboxes the Radius Series 4G, carton by carton.\u003c\/p\u003e\n\u003ciframe width=\"100%\" height=\"360\" src=\"https:\/\/www.youtube.com\/embed\/xCxJwYzm_kk\" title=\"Unboxing the NEW Radius Series 4G speakers | Monitor Audio\" style=\"border:0;margin:0 0 0.9em 0;display:block;\" allowfullscreen\u003e\u003c\/iframe\u003e\n\n\u003ch2 style=\"font-size:1.25em;margin:1.4em 0 0.35em 0;font-weight:600;\"\u003eWhy Audio Advisor?\u003c\/h2\u003e\n\u003cul style=\"margin:0 0 0.9em 0;padding-left:1.4em;line-height:1.6;\"\u003e\n\u003cli\u003e\n\u003cstrong\u003e40+ Years of Expertise\u003c\/strong\u003e — Since 1981, we’ve helped over a million music lovers find the right gear.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e60-Day Money-Back Guarantee\u003c\/strong\u003e — Take your time. Listen, enjoy, and make sure it’s right for you.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReal Experts, Real Help\u003c\/strong\u003e — Our team is here to answer your questions at 800-942-0220, weekdays 9am–6pm EST.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFree Shipping\u003c\/strong\u003e — On orders over $49, delivered to your door.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlexible Payment Options\u003c\/strong\u003e — Financing available so you can start listening now.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2 style=\"font-size:1.25em;margin:1.4em 0 0.35em 0;font-weight:600;\"\u003eLearn More\u003c\/h2\u003e\n\u003cp style=\"margin:0 0 0.9em 0;line-height:1.55;\"\u003eWant to learn more about surround speaker placement, sealed versus ported cabinets, or matching a subwoofer? Visit our \u003ca href=\"https:\/\/learningcenter.audioadvisor.com\/\" style=\"color:#8a5a2b;\"\u003eLearning Center\u003c\/a\u003e for guides, tips, and expert advice.\u003c\/p\u003e\n\n\u003c\/div\u003e\n\n\u003c\/body\u003e","brand":"Monitor Audio","offers":[{"title":"New \/ Black \/ Pair","offer_id":47539371344045,"sku":"NEW-MRRAD14G-BLK-PR","price":549.0,"currency_code":"USD","in_stock":true},{"title":"New \/ Satin White \/ Pair","offer_id":47539371376813,"sku":"NEW-MRRAD14G-SATWHT-PR","price":549.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0750\/3708\/1773\/files\/MRRAD14G-BLK_1.jpg?v=1790005375","url":"https:\/\/www.audioadvisor.com\/products\/monitor-audio-radius-1-4g-bookshelf-speakers","provider":"Audio Advisor","version":"1.0","type":"link"}