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Audio Accessories - Port Tubes

Styles Available: *If you don't see what you want, please contact us. Custom designs are our specialty.

Rolled Flange Port Tubes

  • Acoustically designed
  • Material: High Impact Polystyrene
  • Textured Finish
  • Off-the-shelf delivery
TR-PP2R8X2 TR-PP2X1 TR-PP2R8X4
TR-PP1X4 TR-PP3X1 TR-PP3R8X3
TR-PP4R8X2R5 TR-PP3R8X5 TR-PP4R8X5

Dimension Specifications (units in inches):
Model # A B C D
TR-PP1X4 1.50 1.00 1.20 4.00
TR-PP2R8X2R8 2.79 1.92 2.15 2.90
TR-PP2R8X4 2.79 1.94 2.16 4.15
TR-PP2X1 2.78 1.82 2.06 1.14
TR-PP3X1 3.79 2.88 3.11 1.16
TR-PP3R8X3 3.79 2.92 3.15 3.17
TR-PP3R8X5 3.78 2.93 3.18 5.14
TR-PP4R8X2R5 4.76 3.89 4.10 2.64
TR-PP4R8X5 4.78 3.94 4.15 5.16




Ring Flange Port Tubes

  • Acoustically designed
  • Material: High Impact Polystyrene
  • Matte Finish
  • Off-the-shelf delivery
TR-PP2XR75 TR-PP2R25X5 TR-PP2X5
TR-PP2X2R25 TR-PP3X5

Dimension Specifications (units in inches):
Model # A B C D
TR-PP2XR75 2.46 1.68 1.92 0.87
TR-PP2X2R25 2.45 1.81 2.04 2.42
TR-PP2R25X5 2.68 2.25 2.44 5.00
TR-PP3X5 3.34 2.75 2.98 4.97
TR-PP2X5 2.00 1.70 1.89 5.00




Extendible Port Tubes

  • Acoustically designed
  • Material: ABS
  • Matte Finish
  • Off-the-shelf delivery
BR-4 BR-5 BR-7
BR-6 BR-11 (45 deg extension)

Dimension Specifications (units in inches):
Model # A B C D E
BR-4 5.71 4.53 4.76 5.51 0.37
BR-5 3.76 2.80 1.81 5.04 0.14
BR-6 3.15 2.17 2.36 5.53 0.49
BR-7 2.56 1.57 1.77 3.96 0.49
BR-11 4.72 3.54 3.70 4.62 -








GRT-MARS was first certified ISO 9000 in May 2001by SGS, a leading international ISO consulting and audit firm. In August 2003, we received ISO 9001:2000 certification. By earning ISO 9001:2000 certification, GRT-MARS affirms its commitment to a quality management system dedicated to delivering services of consistently high quality — quality that is paramount — to our many, varied clients with global interests.