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Sound Reinforcement - Forums for Live Sound Professionals - Your Displayed Name Must Be Your Real Full Name To Post In The Live Sound Forums => LAB Subwoofer Forum => Topic started by: Andrew Watts on November 15, 2019, 08:06:51 am

Title: Insulation for sub cabinets
Post by: Andrew Watts on November 15, 2019, 08:06:51 am
For those builders out there, what do you use for internal cabinet lining?
Title: Re: Insulation for sub cabinets
Post by: Scott Holtzman on November 15, 2019, 12:47:53 pm
For those builders out there, what do you use for internal cabinet lining?

A really nice tweed this time of year.
Title: Re: Insulation for sub cabinets
Post by: Art Welter on November 15, 2019, 01:51:47 pm
For those builders out there, what do you use for internal cabinet lining?
Generally, no insulation is used for ported sub cabinets, as it reduces output level.
"Full range" ported cabinets use insulation to reduce reflected upper out of phase frequencies output from the ports.
Sealed cabinets often use polyfill, though it requires more fill than fiberglass to achieve the same results. Fiberglass has fallen out of favor for health and "itch" reasons, though if properly secured, works quite well with no shedding.

Denim and hemp are also used (and tweed  ;) ) but being organic materials, can easily support mold growth so are generally not used for cabinets subject to moisture.
Title: Re: Insulation for sub cabinets
Post by: Andrew Watts on November 15, 2019, 07:08:18 pm
Generally, no insulation is used for ported sub cabinets, as it reduces output level.
"Full range" ported cabinets use insulation to reduce reflected upper out of phase frequencies output from the ports.
Sealed cabinets often use polyfill, though it requires more fill than fiberglass to achieve the same results. Fiberglass has fallen out of favor for health and "itch" reasons, though if properly secured, works quite well with no shedding.

Denim and hemp are also used (and tweed  ;) ) but being organic materials, can easily support mold growth so are generally not used for cabinets subject to moisture.

I had not heard that ported subs don't need insulation.  Most of the cabs I've had over the years have had some form.