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3-Way Bass Module Add-On (Pair)

Gain 20 Hz anechoic extension and convert your 1TD or 1TD-X to a true 3-way with this add on.
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Product Details

**Priced Per Pair**

The "bass module" is an add on for the 1TD/1TD-X or P215/P215-X to convert your existing bookshelf into a floor standing 3-way speaker. It utilizes our low distortion SDX10 subwoofer with 18 mm of verified Klippel xmax with our matching APR10 passive radiator to extend the bass response down to 20 Hz.

Key Benefits:

  • True 3-way system with a crossover point around 200 Hz - not a sat/sub system
  • Extended bass response (20 Hz) with greater clarity and punch
  • Better midrange clarity due to reduced excursion on the woofer in the existing bookshelf
  • Higher output levels - 18 mm Klippel verified xmax on the SDX10

How it works:

The woofer module comes with a passive crossover that gets installed between two sets of biding posts. Your amp connects to the first set of binding posts, which goes to the new crossover. That crossover has an output to the SDX10 and a second set of binding posts. The second set of binding posts get connected to your existing bookshelf with a short run of speaker wire. This keeps the whole system passive but also makes it a true 3-way. Make sure you add 3 washers to each passive radiator when assembling.

What's included:

  • 2x SDX10
  • 2x APR10 with washers (add 3 to each APR)
  • 4x Pairs Binding Posts
  • 2x SmartNode Crossover Boards
  • Crossover Parts (upgraded parts shown, standard pictures coming soon)
  • Screws
  • Wire
  • Quick Connects
  • Optional flat pack (self assembly required)


  • Sensitivity: 85-87 dB (depending on optional resistor padding)
  • Frequency Response (with existing bookshelf): 23 Hz to 20 kHz, +/- 3 dB
  • Impedance: 4 Ohm nominal
  • Recommended wattage: 50 - 300 watts
  • Weight: 62 lbs
  • Dimensions: 26" H x 12.75" W x 14.75" D

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