{"product_id":"stereo-integrity-tm65-mkiv-midbass-pair","title":"Stereo Integrity TM65 mkIV | 6.5 Inch Midbass - Pair","description":"\u003cstyle\u003e\n.si-desc{font-family:'Helvetica Neue',Arial,sans-serif;line-height:1.75;color:#1e293b;max-width:1200px;margin:0 auto;background:#ffffff}\n.si-hero{background:linear-gradient(135deg,#0b0b0c 0%,#2d3139 100%);padding:52px 36px;text-align:center;color:#ffffff}\n.si-hero .si-brand{font-size:.85em;letter-spacing:.3em;text-transform:uppercase;color:#cbd5e1;margin:0 0 10px 0}\n.si-hero .si-title{font-size:2.4em;font-weight:800;letter-spacing:1px;margin:0 0 8px 0;color:#ffffff}\n.si-hero .si-subtitle{font-size:1.15em;font-weight:300;color:#e2e8f0;margin:0 0 22px 0}\n.si-badges{display:flex;justify-content:center;flex-wrap:wrap;gap:10px}\n.si-badge{background:rgba(255,255,255,.08);border:1px solid #9ca3af;color:#f8fafc;padding:7px 18px;border-radius:20px;font-size:.88em;font-weight:600}\n.si-section{padding:44px 36px;border-bottom:1px solid #e2e8f0;background:#ffffff}\n.si-section.si-alt{background:#f5f6f8}\n.si-section h2{color:#111827;font-size:1.8em;font-weight:700;margin:0 0 18px 0;padding-bottom:10px;border-bottom:3px solid #B91C1C}\n.si-section p{font-size:1.04em;color:#334155;margin:0 0 15px 0}\n.si-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px;margin:22px 0}\n.si-card{background:#ffffff;border:1px solid #e2e8f0;border-top:4px solid #B91C1C;border-radius:8px;padding:20px}\n.si-card h3{color:#111827;font-size:1.08em;font-weight:700;margin:0 0 8px 0}\n.si-card p{font-size:.97em;color:#475569;margin:0}\n.si-note{background:#f5f6f8;border-left:5px solid #B91C1C;padding:18px 22px;margin:22px 0;border-radius:0 8px 8px 0}\n.si-note p{margin:0;color:#334155}\n.si-link{display:inline-block;background:#B91C1C;color:#ffffff;text-decoration:none;font-weight:700;padding:12px 24px;border-radius:8px;margin:6px 0}\n.si-cta{background:linear-gradient(135deg,#0b0b0c 0%,#2d3139 100%);padding:44px 36px;text-align:center;color:#ffffff}\n.si-cta h2{color:#ffffff;font-size:1.6em;margin:0 0 12px 0}\n.si-cta p{color:#e5e7eb;font-size:1.04em;margin:0 0 8px 0}\n@media (max-width:600px){.si-grid{grid-template-columns:1fr}.si-hero,.si-section,.si-cta{padding:34px 18px}.si-hero .si-title{font-size:1.8em}}\n\u003c\/style\u003e\n\u003cdiv class=\"si-desc\"\u003e\n\u003cdiv class=\"si-hero\"\u003e\n\u003cp class=\"si-brand\"\u003eStereo Integrity\u003c\/p\u003e\n\u003cp class=\"si-title\"\u003eTM65 mkIV\u003c\/p\u003e\n\u003cp class=\"si-subtitle\"\u003e6.5 Inch Midbass | Sold as a Pair\u003c\/p\u003e\n\u003cdiv class=\"si-badges\"\u003e\n\u003cspan class=\"si-badge\"\u003ePure Aluminum Cone\u003c\/span\u003e \u003cspan class=\"si-badge\"\u003e50 mm Copper Voice Coil\u003c\/span\u003e \u003cspan class=\"si-badge\"\u003e7.9 mm One-Way Xmax\u003c\/span\u003e \u003cspan class=\"si-badge\"\u003e58.3 mm Mounting Depth\u003c\/span\u003e \u003cspan class=\"si-badge\"\u003e150W RMS\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"si-section\"\u003e\n\u003ch2\u003eAggressive Midbass, Smoother Midrange\u003c\/h2\u003e\n\u003cp\u003eThe TM65 mkIV is a completely new, low distortion 6.5 inch driver that Stereo Integrity designed with Finite Element Analysis in North Carolina. The brief was to keep the aggressive midbass the TM65 line is known for while adding smoother midrange, with on-axis extension out to 5,000 Hz.\u003c\/p\u003e\n\u003cp\u003eIt mounts in just 58.3 mm thanks to a custom tooled cast aluminum basket with an integrated rain shield, which makes it a practical upgrade for factory door locations.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"si-section si-alt\"\u003e\n\u003ch2\u003eEngineering Highlights\u003c\/h2\u003e\n\u003cdiv class=\"si-grid\"\u003e\n\u003cdiv class=\"si-card\"\u003e\n\u003ch3\u003eDual Shorting Rings\u003c\/h3\u003e\n\u003cp\u003eA copper pole sleeve and a magnet ID ring lower and linearize inductance. Stereo Integrity says the resulting Xmax to Le ratio is usually found only in far more expensive drivers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"si-card\"\u003e\n\u003ch3\u003e50 mm CZA Former Voice Coil\u003c\/h3\u003e\n\u003cp\u003eSolid copper windings on a 50 mm CZA former drive the cone. The copper coil, CZA former, and aluminum cone work together to pull heat away from the coil and raise thermal power handling.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"si-card\"\u003e\n\u003ch3\u003ePure Aluminum Cone\u003c\/h3\u003e\n\u003cp\u003eThe cone body is shaped for the best strength to weight ratio, giving it the stiffness for midbass and deep bass along with proper frequency extension.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"si-card\"\u003e\n\u003ch3\u003eTuned for the Door\u003c\/h3\u003e\n\u003cp\u003eA vehicle door is a lossy space that behaves much like an infinite baffle, so Stereo Integrity gave the TM65 mkIV a higher Qts, in the 0.65 region, for the best mix of low frequency extension and output there.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"si-section\"\u003e\n\u003ch2\u003eCrossover and System Integration\u003c\/h2\u003e\n\u003cp\u003eStereo Integrity recommends running the TM65 mkIV from 65 Hz to 3,500 Hz with high-pass and low-pass crossovers, using a high-pass slope of 24 dB per octave or steeper. Its anechoic on-axis response runs from 65 Hz to 8,000 Hz, and it stays smooth to 3,500 Hz off-axis.\u003c\/p\u003e\n\u003cdiv class=\"si-note\"\u003e\u003cp\u003e\u003cstrong\u003eBuild a front stage:\u003c\/strong\u003e Pair the TM65 mkIV with an M22 or M28 tweeter for a 2-way, or add the M3 Carbon midrange, which Stereo Integrity recommends alongside it, for a 3-way.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"si-section si-alt\"\u003e\n\u003ch2\u003eEnclosure Options\u003c\/h2\u003e\n\u003cp\u003eMost TM65 mkIV installs go in the door, but Stereo Integrity also publishes enclosure recommendations: 0.2 cubic feet sealed, with a range of 0.15 to 0.5, or 1.5 cubic feet ported and tuned to 30 Hz with 7 square inches of port area, with a range of 1.2 to 2.0 cubic feet.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"si-section\"\u003e\n\u003ch2\u003eFitment\u003c\/h2\u003e\n\u003cdiv class=\"si-note\"\u003e\u003cp\u003e\u003cstrong\u003eOuter diameter:\u003c\/strong\u003e 167 mm. \u003cstrong\u003eCutout:\u003c\/strong\u003e 143 mm. \u003cstrong\u003eMounting depth:\u003c\/strong\u003e 58.3 mm. \u003cstrong\u003eMounting holes:\u003c\/strong\u003e 4. \u003cstrong\u003eFlange thickness:\u003c\/strong\u003e 5 mm. Sold as a pair.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"si-cta\"\u003e\n\u003ch2\u003eAuthorized Stereo Integrity Dealer\u003c\/h2\u003e\n\u003cp\u003eAudio Intensity is an authorized Stereo Integrity dealer, and we build enclosures around their drivers.\u003c\/p\u003e\n\u003cp\u003eCall 931-563-5151 and we will help you plan a front stage around the TM65 mkIV.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Stereo Integrity","offers":[{"title":"Default Title","offer_id":44924077768793,"sku":"SI-TM65MKIV","price":469.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/stereo-integrity-tm65-mkiv-front.jpg?v=1789576780","url":"https:\/\/audiointensity.com\/products\/stereo-integrity-tm65-mkiv-midbass-pair","provider":"Audio Intensity","version":"1.0","type":"link"}