Owner's Manual

Before you start
It's a good idea to confirm that you have purchased the correct size speakers to
fit your application. If you have any reservations about being able to complete the
installation yourself, we recommend contacting a professional.
Mounting Location
Choose a suitable
mounting location
Tube
The NPT1 clamping system is designed for
towers and support structures that utilize ROUND
tubing. Oval tubing and flat structures will not
work with this clamp. The NPT1 clamp can be
used with tube diameters from 1.5" up to 2.75 ".
Included are separate bushing sets for all tube
sizes at 1/8" increments. Refer to the table below
to determine your configuration.
Tube Clamp
Top Bottom
Diameter Circumference Bushing Bushing
1.5 4. 71 A 1.50 1.50
1.625 5.10
A 1.63 1.63
1.75 5.50 A 1.75 1.75
1.875
5.89 A none
1.88
2 6.28 B 2.00 2.00
2.125 6.68
B 2.13 2.13
2.25 7.07 B 2.25 2.25
2.375
7.46 B 2.38 2.38
2.5
7.85 B 2.50 2.50
2.625 8.25 B
2.68 2.68
2.75 8.64 B none none