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MF1 Tech Notes

Replacing Your Closed-Field Speaker Tubing


Product: EC1, MF1, CF1
Version: All
Date Added: 2014-09-10


The PVC tubing supplied with closed field speakers can get brittle and crack over time, especially if cleaned frequently.


If tubing is brittle or cracked it should be replaced. The PVC tubing TDT uses for the MF1, EC1 and CF1 speakers is commercially available from several sources.

The supplier TDT uses is McMaster-Carr. It is listed on their website as "Masterkleer PVC Tubing," part number 5233K51.

This tubing can be sterilized with steam (autoclaving) and gas.

If you'd like to source this from another supplier, the tube specifications are:

ID 1/16"

OD ⅛"

Wall 1/32"

MF1 Tube Tip or Ear Tip cannot be installed


Product: MF1
Version: All
Date Added: 2011-10-05


When the blue gaskets that holds the Tube Tip and Ear Tip to the flange get old or dry out, it can become difficult to insert/remove the tips.

The gasket can get stuck as you insert the tip into the flange.


Spray a cotton swab lightly with silicon, then rub the swab over the blue gasket and around the mating surface inside the flange. This will allow you to easily insert/remove the tips.


Contact TDT for replacement gaskets.