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In Stock Same-day processing on in-stock orders Available to order; contact us to confirm lead time Contact us for availability
Same-day processing on in-stock orders. US orders arrive in 3–5 business days (AK/HI 5–7) · Expedited delivery (2–3 business days) is available for eligible items. Lead time is confirmed after you order. Contact us for availability. Tracking number emailed when your order ships. Shipping policy
Product Overview
The KEF Ci R Series Ci200QSb is a THX Select2/Ultra2 certified in-wall subwoofer designed to deliver high-output, deep bass performance with a minimal visual footprint. Sold as a pair, each unit features an 8-inch high-output driver housed in an ultra-thin bezel (UTB) frame with a paintable magnetic grille.
Key Features
Reference-Grade Architectural Bass Performance
Engineered to meet the strict standards of KEF's flagship R Series, the Ci200QSb in-wall subwoofer brings true cinematic sub-bass performance into custom home installation environments. Whether integrated into a high-end dedicated home theater or a discreet multi-channel media room, this architectural subwoofer delivers deep, controlled, and tight low frequencies without sacrificing valuable floor space.
THX Select2 / Ultra2 Certified Precision
When installed in appropriate multi-subwoofer arrangements, the Ci200QSb meets rigorous THX Select2 and Ultra2 certification standards, ensuring it reproduces film soundtracks and music with reference-level volume, dynamic headroom, and vanishingly low distortion.
Advanced Driver Technology & Discreet Design
Each Ci200QSb subwoofer features a specialized 8-inch low-frequency driver designed for long-excursion linear playback, ensuring deep extension even within shallow wall cavities. Wrapped in KEF's signatures Ultra-Thin Bezel (UTB) frame, the magnetic metal grille covers the driver completely and can be painted to match any wall decor, providing near-invisible acoustic integration.
Flexible Configuration & System Integration
Designed for maximum installer flexibility, the Ci200QSb can be operated as a passive subwoofer or driven via external KEF equalization and amplification units (such as the KEF KXA400 amplifier). Running multiple Ci200QSb units in a room smooths out acoustic room modes, eliminating bass dead spots and delivering uniform, punchy low-frequency coverage across every seat.
Key Specifications
| Feature | Specification |
| Driver Size | 8.0 in. (200 mm) high-output bass driver |
| Certification | THX Select2 / THX Ultra2 (multi-sub configuration) |
| Frequency Response | 40 Hz – 100 Hz (±3 dB) |
| Nominal Impedance | 6 Ω |
| Sensitivity | 88 dB (2.83V / 1m) |
| Recommended Amp Power | 10 – 150 W per channel |
| Frame & Grille | Ultra-Thin Bezel (UTB) with paintable magnetic grille |
| Mounting Cutout Dimensions | 9.37 x 9.37 in. (238 x 238 mm) |
| Mounting Depth | 3.98 in. (101 mm) |
| Package Quantity | Pair (2 Subwoofers) |
| Feature | Specification |
| Driver Size | 8.0 in. (200 mm) high-output bass driver |
| Certification | THX Select2 / THX Ultra2 (multi-sub configuration) |
| Frequency Response | 40 Hz – 100 Hz (±3 dB) |
| Nominal Impedance | 6 Ω |
| Sensitivity | 88 dB (2.83V / 1m) |
| Recommended Amp Power | 10 – 150 W per channel |
| Frame & Grille | Ultra-Thin Bezel (UTB) with paintable magnetic grille |
| Mounting Cutout Dimensions | 9.37 x 9.37 in. (238 x 238 mm) |
| Mounting Depth | 3.98 in. (101 mm) |
| Package Quantity | Pair (2 Subwoofers) |
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Same-day processing on in-stock orders; orders placed on weekends or holidays begin processing the next business day. For US orders: Standard 3–5 business days (5–7 business days to Alaska and Hawaii). Expedited delivery (2–3 business days) is available for eligible items and is quoted after you order. Backordered and special-order items ship on confirmed lead times. Estimates are not guarantees; weather, carrier delays, and remote destinations can extend delivery times.
We accept orders only with U.S. shipping and billing addresses (the 50 states and DC). We cannot accept international, APO/FPO, or U.S. territory addresses. We ship via carriers including FedEx, UPS, and USPS. Standard ground shipping is free on all U.S. orders. Expedited shipping is available for eligible items and is quoted after you order; nothing extra is charged without your approval.
Inspect your order on arrival. If an item arrives damaged, defective, or is not what you ordered, contact us within 48 hours so we can arrange a replacement or refund at no cost to you, including return shipping. If a package arrives damaged in transit, also keep all packaging so we can file a carrier claim.
Full policy: Shipping Policy Full policy: Refund & Return Policy
Most items can be returned within 30 days of the delivery date for a refund or exchange, and every return needs an RMA number. For a full refund, items may be opened but must be unused, in original condition with all accessories and packaging, and any free promotional items must be included. Except for damaged, defective, or mis-shipped items, you pay return shipping. Items returned incomplete, used, or missing original packaging may be subject to a restocking fee of up to 15% or a partial refund. Special-order, custom-configured, and clearance/final-sale items, opened software, downloadable content, gift cards, opened consumables and personal-use items, and items missing serial numbers or manufacturer packaging can’t be returned. Any exceptions are noted on the product page.
Once we receive and inspect your return, we email you to confirm approval. Approved refunds go to your original payment method, typically within 3–5 business days of inspection, and your bank or card issuer may take an additional 5–10 business days to post the credit. Original shipping charges are non-refundable unless the item arrived damaged, defective, or was shipped in error.
A manufacturer warranty may apply to an eligible product. Coverage, term, and claim process vary by product, condition, and manufacturer, so check the product listing and manufacturer documentation for the exact term. Open-box, refurbished, used, and final-sale items may have different terms. If warranty eligibility is important to your purchase, contact us before ordering so we can confirm the information available for this item. Our support team can also help locate documentation or start an eligible claim.
We accept Visa, Mastercard, American Express, and Discover cards, PayPal, and Google Pay on supported devices and browsers; checkout shows the options available for your order and device. Purchase orders, NET 30 terms, and wire transfers are offline and by arrangement only. Call us at (800) 581-6868 (Mon–Fri 9 AM – 6 PM ET), email support@audiovideonation.com, or use Live Chat when available.
30-day returns on most items (RMA required). For a full refund, items may be opened but must be unused, in original condition with all accessories and packaging
Return policyReport it within 48 hours for a replacement or refund at no cost, including return shipping
Damaged item policy