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5 Years FULL Replacement

Shopper Award

Definitive Technology Demand D17 Floorstanding Speaker Each- (Left)



In The Continental US

5-Year Warranty

On All Speakers


No Sales Tax!

The D17 tower speaker features an exclusive 3-way driver configuration with a 1” annealed aluminum dome tweeter, a 6.5” BDSS™ midrange woofer, and dual 6.5” carbon fiber bass drivers, complemented by dual 10” side-firing passive radiators, for a full-range, room-filling sonic performance.

  • 3-Way Configuration and Audiophile-quality Crossovers
  • Laterally Offset Tweeters for a Precise Soundstage
  • Two Carbon Fiber Woofers, Two 10” Passive Radiators and a BDSS™ Midrange Woofer

Brand New Products

All items we sell are New and 100% Genuine products!

Price Match Guarantee

We guarantee to match any out-the-door lower price!

Hassle Free Returns

20-Day Returns on all products (Check store policy for more details)


Product highlights:

  • matched pair of floor-standing speakers for music or home theater
  • 3-way, 4-driver design
  • 1″ aluminum dome tweeter with 20/20 Wave Alignment Lens for smooth, clear highs
    • each tweeter is offset by 1/2″ for improved stereo imaging and high-frequency performance
  • 6-1/2″ midrange driver with Balanced Dual Surround System™ (BDSS) technology for outstanding control and clarity
    • Linear Response Waveguide provides smooths off-axis frequency response and even sound dispersion
  • dual 6-1/2″ carbon fiber woofers for tight, clean bass
  • dual opposing side-firing 10″ passive radiators for increased bass extension
  • frequency response: 42-22,000 Hz (-3dB)
  • recommended amplifier power: 40-300 watts
  • nominal impedance: 8 ohms
  • sensitivity: 87 dB
    • high-current amplification from a quality power amp or integrated amplifier is recommended for best performance
  • high-gloss lacquer finish with an attractive extruded aluminum front baffle
  • dual sets of binding post speaker terminals allow bi-amping or bi-wiring
  • removable magnetic cloth grilles
  • 10-1/4″W x 42-3/4″H x 14-3/4″D (each)
  • weight: 64 lbs. (each)

What’s in the box:

  • Left floor standing loudspeaker
  • Right floor standing loudspeaker
  • 2 Grilles
  • 4 Jumper-straps (pre-installed)
  • 2 Bases
  • 8 Spike feet
  • 8 Floor-glides
  • 8 Lock-rings
  • 8 Screws
  • Cleaning cloth
  • Owner’s Manual


Free Shipping within the Contingent United States can typically take 1-2 full weeks for delivery (or sooner).
Once your product ships out we will ALWAYS email you a tracking number for your convenience to be able to track online.

Air and Ground shipment time frames are business days only, and exclude weekends and/or holidays.
Orders outside the 48 continental States require Second Day or Next Day Air service.


NationwideStereo.com does not assess duties for international orders and they are subsequently subject to applicable customs, import duties and taxes, which are the sole responsibility of the customer. Please contact your local customs office for details.

  • Nationwide Stereo guarantees you the utmost in quality, authenticity, and reputability
  • 20 Day Return Policy*
  • No sales tax charged as we are located out of a non sales tax state
  • 1-5 Year NationwideStereo Hassle Free Replacement Warranty on all items
At Nationwidestereo.com, your complete satisfaction is important to us. If for any reason you are not 100% satisfied with your purchase simply create an RMA under our Contact Us Page & send your item back to Nationwide Stereo in its new, unused condition, with original packaging and we will be happy to provide you with either a partial refund of the purchase price or a store credit toward an exchange (excluding shipping & handling charges). Some conditions may apply. Please read our full return policy.
Our Products:
  • are authentic, never used, in the original box with manuals.
  • have a 1 to 5 year warranty program (see our warranty section for details).
Your comfort, security and confidence are our utmost concern. All transactions are digitally encrypted using the latest technologies. We never share any of your information.

Do the products you sell have a warranty?

Yes all products we sell come with an equivalent to manufacturer warranty for the same time duration as the manufacturer would supply you with.  If you ever experience an issue with your item purchased from us, you will simply have to contact us for repair or replacement on your product within the warranty time period*


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