{"product_id":"the-quadrilogy-selectorized-leg-extension-seated-leg-curl-machine-copy-1","title":"THE QUADRILOGY Selectorized Leg Extension + Seated Leg Curl Machine (HOMEGYMCON 1 OF 2))","description":"\u003ch6\u003eTHE QUADRILOGY™ Leg Extension + Seated Leg Curl\u003c\/h6\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003e\u003cstrong\u003eTHE QUADRILOGY \u003c\/strong\u003eis the fourth generation of our popular Leg Extension + Seated Leg Curl machine. It builds upon the feel, functionality, and adjustability of previous versions while incorporating higher felt resistance*, significant structural upgrades, premium materials, and numerous improvements developed from customer feedback.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe Quadrilogy is also one of the first selectorized Temple of Gainz machines available with our patent-pending \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eBeyond Power VOLTRA Digital Resistance Integration\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e. This optional configuration allows a compatible Beyond Power VOLTRA to replace the traditional weight stack, reducing the initial cost of the machine while providing greater control over resistance, eccentric loading, and resistance-curve customization^.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch6\u003eEstimated Shipping Timeline\u003c\/h6\u003e\n\u003cp\u003e\u003cspan\u003eMachines are currently in production, and orders are being accepted for production units.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eWeight Stack Configuration:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Machines equipped with a standard selectorized weight stack are estimated to begin shipping in \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003emid-September 2026\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eVOLTRA-Only Configuration:\u003c\/strong\u003e Machines equipped with the integrated VOLTRA mount and VOLTRA cable-routing components, without a weight stack or guide rods, are estimated to begin shipping in \u003cstrong\u003elate September 2026\u003c\/strong\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAll shipping dates are estimates and are subject to production, freight, and other delays. Please review our payment and cancellation policies, which apply to all purchased and unfulfilled orders.\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch6\u003eWhat Is The Quadrilogy?\u003c\/h6\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe Quadrilogy combines two highly effective lower-body isolation exercises, the leg extension and seated leg curl, into one heavy-duty machine with a compact footprint.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eA fully adjustable back pad moves forward and backward to accommodate a wide range of users and body proportions. The extended seat pad and multiple back-pad positions provide additional support for taller users and those with longer legs.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe movement arm offers ten starting positions, while the leg roller includes five adjustment positions. The thigh pad provides eight secure starting positions for the seated leg curl. Together, these adjustments allow users to customize their starting position, range of motion, and alignment for both exercises.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eLaser-engraved adjustment numbers on the movement arm, leg roller, and thigh pad make it easy to record and consistently repeat preferred settings.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe recessed front crossmember provides greater clearance and range of motion at the beginning of the leg extension and the end of the seated leg curl. The repositioned thigh pad and updated handle placement further improve comfort, stability, and ease of use.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch6\u003eWhat’s New for the Quadrilogy?\u003c\/h6\u003e\n\u003ch6\u003eStructural Enhancements and Increased Rigidity\u003c\/h6\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe Quadrilogy features extensive structural improvements designed to increase stability, rigidity, and long-term durability.\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eTwo additional crossmembers have been added to the lower and rear portions of the frame for increased structural reinforcement.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMajor frame connections have been upgraded to hex bolts secured with reinforcement plates.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eThe thigh-pad and movement-arm mounting points have been heavily reinforced with welded triangular brackets, additional through-bolts, and reinforcement plates.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eThe leg-roller assembly has been redesigned with additional triangular supports and reinforced bearing brackets on both sides of the movement arm.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eThe leg-extension handles now use rounded mounting brackets designed to reduce play and movement while improving overall stability.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch6\u003eLarger Cam and Higher Felt Resistance*\u003c\/h6\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe Quadrilogy frame and movement mechanics have been redesigned to accommodate a significantly larger cam. The larger cam increases the felt resistance during the leg-extension movement compared with previous versions.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe seated leg-curl pulley assembly has been engineered to create a mountain-peak-style resistance curve. Resistance begins at a moderate level, increases toward its highest point through the middle portion of the movement, and gradually tapers near the end range.*\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe included \u003c\/span\u003e120 kg \/ 264 lb weight stack\u003cspan\u003e, combined with the machine’s updated cam geometry, provides substantial loading capacity for progressive overload across a wide range of users and training levels.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch6\u003ePremium Material Upgrades\u003c\/h6\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003e\u003cspan\u003eSolid Guide Rods:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e The Weight Stack Configuration now includes upgraded solid-metal guide rods. These provide greater rigidity and allow the machine to be transported fully assembled when appropriate equipment, securing methods, and handling procedures are used.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003e\u003cspan\u003eAluminum Pulleys Standard:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Aluminum pulleys now come standard on all Quadrilogy configurations.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003e\u003cspan\u003eKnurled Aluminum Handles:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Knurled aluminum handles replace the previous rubber-grip handles and come standard on both the leg-extension and seated leg-curl handle assemblies.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch6\u003e\u003cspan\u003eUpdated Branding\u003c\/span\u003e\u003c\/h6\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe Quadrilogy introduces a new metallic Temple of Gainz shield logo, a redesigned and streamlined exercise instruction label, and new Temple of Gainz purple-themed weight-stack decals.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe exercise instruction label is optional. The purple portions of the weight-stack decals may also be trimmed away by the customer to create a black-and-white appearance, if preferred. Any decal modification is performed at the customer’s discretion.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch6\u003e\u003cspan\u003eConfiguration Options\u003c\/span\u003e\u003c\/h6\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eWeight Stack Configuration\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e includes a 120 kg \/ 264 lb selectorized weight stack, solid-metal guide rods, the standard weight-stack cable, aluminum pulleys, and knurled aluminum handles.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eVOLTRA-Only Configuration\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e includes the integrated VOLTRA mounting system, VOLTRA-compatible cable routing, a direct 1:1 attachment option, and a hook attachment point for an optional 1:2 pulley configuration.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe VOLTRA-Only Configuration does not include a Beyond Power VOLTRA, DIY Dock, weight stack, guide rods, climbing pulley, or the standard weight-stack cable. A compatible climbing pulley is required for 1:2 operation and must be purchased separately.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch6\u003e\u003cspan\u003eCompact Footprint\u003c\/span\u003e\u003c\/h6\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eDespite its versatility, adjustability, and heavy-duty construction, the Quadrilogy delivers heavy-duty functionality within a manageable footprint suitable for home gyms, personal-training studios, and light commercial facilities.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003ePlease review the dimensions shown in the product gallery, including the machine’s minimum and maximum dimensions across its available adjustment positions.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e*Felt Resistance Disclaimer\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003ePublished pulley ratios, weight-stack values, and resistance descriptions are provided for general reference and do not guarantee the exact force experienced by every user. Actual felt resistance may vary based on cam geometry, cable routing, pulley configuration, machine settings, seat and pad positions, user height and limb length, exercise technique, range of motion, movement speed, cable tension, friction, maintenance condition, manufacturing tolerances, and any digital resistance settings used.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe nominal 1:1 pulley ratio describes the cable-routing relationship and should not be interpreted as a guarantee that the force experienced at the leg roller will exactly match the selected weight throughout the entire movement. Resistance changes through the range of motion based on the cam profile, movement-arm position, and user setup. Comparisons with other machines, free weights, cable systems, digital resistance devices, or prior Temple of Gainz models are inherently approximate.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e^Beyond Power VOLTRA Compatibility, and Safety Disclaimer\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe Beyond Power VOLTRA and DIY Dock are manufactured and sold separately and are not included.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eUsers must follow all operating instructions, warnings, resistance limits, setup requirements, and safety guidance provided by both Temple of Gainz and Beyond Power.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eFor additional information regarding VOLTRA use and digital resistance integration, please review our \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eDigital Resistance Integration Disclaimer\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e before purchasing or using the machine.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eBy purchasing the VOLTRA-Only Configuration or using a VOLTRA with the Quadrilogy, the purchaser acknowledges that they have reviewed and accepted the Digital Resistance Integration Disclaimer and understand the applicable operating instructions, resistance limitations, safety guidelines, inherent risks, and user responsibilities.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFuture Weight Stack Conversion\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eCustomers who purchase the VOLTRA-Only Configuration may later purchase the components required to convert the machine to the traditional Weight Stack Configuration, subject to availability and compatibility.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe current estimated price for the conversion package is \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e$649\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, plus applicable taxes and freight shipping. Freight shipping may cost approximately \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e$400 or more\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, depending on destination, carrier rates, delivery requirements, and accessorial charges.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003ePricing and availability are subject to change. Installation is not included.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDelivery and Assembly Expectations\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003ePlease review our \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eShipping Policy\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e and \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eProduct and Assembly Disclaimer\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e before purchasing, including all delivery, inspection, installation, and assembly expectations.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eBy completing a purchase, the customer acknowledges and agrees to the applicable shipping, assembly, payment, cancellation, safety, and product-use policies.\u003c\/span\u003e\u003c\/p\u003e","brand":"Temple of Gainz","offers":[{"title":"Default Title","offer_id":52721862246712,"sku":null,"price":1999.99,"currency_code":"USD","in_stock":true}],"url":"https:\/\/templeofgainz.com\/products\/the-quadrilogy-selectorized-leg-extension-seated-leg-curl-machine-copy-1","provider":"Temple of Gainz","version":"1.0","type":"link"}