The Terwilliger 71


Woofer: Dual 5.25″ Aluminum Apolymer-Cones™, rubber surround, 18 oz magnet, 1. 25″ voice coil, video-shielded

Tweeter: Swivel 30 degrees, 1″ Pure balanced synthetic silk soft Accutec-Dome™, ferrofluid-cooled, neodymium magnet

Crossover: Phonalic PCB board, 12 dB woofer section, 12 dB tweeter section

Switch Protection: Polyimide switch-auto protect reset switch, over power protection

Overall Frequency Response: 45 Hz – 24,000 Hz (+ – 9 dB)

Low Frequency Limit: 60 Hz  (-3 dB)

Upper Frequency Limit: 22, 000 Hz  (-3 dB)

Sensitivity: 87 dB at 1 watt / 1 meter away

Maximum Thermal Rating: 125 watts

Impedance: 8 ohms

Overall Dimensions: 16 1/2″ x 8″ x 3 3/4″ ; fits horizontally between standard stud width

Cutout Dimensions: 15 1/4″ x 6 5/8″




An template is included in this kit. Please cut your opening only after you receive the speakers.

  • Warranty: Lifetime


  • Lightweight and stiff golden Apolymer-Cones™ for a resounding, intense, and booming bass – perfect for that full-effect, action-packed movie.
  • Pure-balanced synthetic and silk-soft Accutec-Dome™ tweeters produces brilliant highs and smooth midranges in an effective diffusion pattern.
  • Comes with Exact Fit templates for that easy one-cut, drop-in installation, and a precision flange that clamps the speaker securely to the drywall.
  • Durable CAD- and injection-molded butyl rubber surrounds suppress unwanted cone resonances for a lifetime of reliable sound.
  • Enjoy greater accuracy and more realistic imaging with aiming tweeters that pivot independently.
  • Precision timbre matching ensures utterly seamless blending from speaker to speaker.
  • Customize the look of your speakers by by painting the grill and frame for a nearly invisible installation.
  • Extend your listening area to include enclosed outdoor areas.




Rustproof hardware, durable butyl rubber surrounds and powder coated (in-ceiling) & painted steel (in-wall) grilles make the ProGold Series speakers suitable for high-moisture areas like bathrooms or even under eaves of an enclosed porch. Exposed outdoor use is not a suitable usage for any InwallTech speaker.