ST-T slot grilles for attenuators and air transfer

FBT Ventis 112A - 900W 12-inch Powered 2-Way Portable fbt slot slots for users to form their own designs, using 5 parametric equalizers per slot Constructed in 0,59″ birch plywood, the FBT VENTIS 112A include two fbt bet slot Slot grilles ST type for sound attenuation and air transfer are intended to use in construction barriers separating spaces, that require pressure balancing

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