View Our Chair Fitting Form — Click Here Contoured Mid-Back Support for All-Day Professional Comfort The Office Master Discovery Back DB74 is a mid-back ergonomic task chair built around the Discovery Back — a contoured backrest design that follows the natural curve of the spine to deliver targeted lumbar support throughout the workday. For standard-height professionals who need a chair that actively supports their posture with precision adjustability and commercial-grade durability, the DB74 delivers the Discovery Back's clinical benefits in a compact mid-back profile — at a lower price point than the tall-back DB78. Key Features & Benefits Discovery Back design — Contoured backrest follows the natural spinal curve, providing targeted lumbar support that reduces lower back pain and fatigue during extended sitting Mid-back profile — Provides thorough lumbar and mid-back support for standard-height users; more compact than the DB78 tall-back Adjustable lumbar support — Customizable lower back positioning to align with your specific spinal curve Seat depth adjustment — Accommodates different leg lengths to ensure proper thigh support without pressure behind the knees Multi-position armrests — Height and width adjustable to reduce shoulder and neck strain (optional KR-200 armrests available) Tilt and lock mechanism — Back angle adjustment with lock for personalized recline positioning Pneumatic seat height adjustment — Smooth tool-free adjustment for optimal desk and monitor alignment High-density foam cushioning — Maintains comfort and support through extended sitting sessions Dual-wheel casters — Smooth movement on carpet or hard floor surfaces Multiple fabric grade options — Customizable upholstery to match your office environment 300 lb weight capacity Manufacturer's limited warranty included Technical Specifications Model: Office Master Discovery Back DB74 SKU: DB74, Grade 1 Back Style: Discovery Back — mid-back, contoured spinal support Weight Capacity: 300 lbs Seat Height: Pneumatic adjustment Seat Depth: Adjustable Lumbar: Adjustable Armrests: Height and width adjustable (optional KR-200 armrests) Recline: Tilt and lock mechanism Casters: Dual-wheel (carpet or hard floor) Upholstery: Multiple fabric grade options Warranty: Manufacturer's limited warranty Manufacturer: Office Master ⚠️ Made-to-Order: Each chair is made-to-order based on your selections to ensure the best fit and performance. Because of this, orders are final—but we're here to help you get it right. Ideal For Standard-height professionals spending 6+ hours daily at a desk Users who want the Discovery Back's contoured support in a mid-back profile Anyone experiencing lower back pain from inadequate lumbar support Corporate offices, healthcare, and education environments seeking reliable ergonomic task seating Budget-conscious buyers who want Discovery Back performance at a lower price than the DB78 Frequently Asked Questions What is the Discovery Back design? The Discovery Back is Office Master's contoured backrest design that follows the natural S-curve of the spine. Unlike flat or minimally contoured backs, it provides targeted support at the lumbar region and mid-back, reducing the muscular effort required to maintain upright posture during extended sitting. What is the difference between the DB74 and DB78? Both feature the Discovery Back design and the same ergonomic adjustment platform. The DB74 is the mid-back version — ideal for standard-height users who don't require additional upper back coverage. The DB78 is the tall-back version, providing additional upper back and shoulder support for taller users or those who want more comprehensive coverage. Our specialists can help you determine which is right for your body. What armrest options are available? The DB74 is available with no armrests or with KR-200 adjustable armrests offering height and width adjustment for proper shoulder and elbow positioning. What fabric options are available? The DB74 is available in multiple fabric grades. Contact us or book a consultation to review current upholstery options and lead times for your configuration. Is this chair suitable for users with existing back conditions? The DB74's adjustable lumbar and contoured Discovery Back design are well-suited for users managing lower back discomfort from prolonged sitting. For existing medical conditions, consult your healthcare provider. We offer ergonomic consulting services to help configure the chair correctly for your specific needs. Learn more here. Can I try this chair before ordering? Yes — visit our Bay Area showroom where our certified specialists can walk you through the Discovery Back series. We offer ergonomic consulting services in-person and virtually. Schedule a consultation. How long does delivery take? As a made-to-order chair, lead times vary by configuration. Contact us for current estimates before placing your order. What warranty is included? The DB74 includes Office Master's manufacturer's limited warranty. Contact us for full warranty terms and coverage details. Why Ask Ergo Works? With 30+ years of ergonomic expertise, Ask Ergo Works is not a general furniture retailer — we are certified ergonomic specialists who assess your specific needs before recommending any product. Certified specialists — Professional ergonomic certifications and ongoing clinical training Professional assessment process — We evaluate your posture, work habits, and environment before recommending a chair Personalized recommendations — Every recommendation is specific to your body dimensions and workspace Enterprise & B2B experience — Volume purchasing support for corporate offices, healthcare, education, and lab environments Post-purchase support — Available after delivery to assist with setup, adjustments, and ongoing ergonomic guidance Not sure if the DB74 or DB78 is right for you? We offer ergonomic consulting services to help you make the right call. Learn more and book a consultation.
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