Recording - March 2014 - 62
Fig. 6. The gasket material is installed, in this
instance using 3M 130C linerless rubber splicing tape. This is a good moment to staple the
hardware cloth to the inside of the port.
Fig. 7. Fitting the front port panel prior to screwing it down (above); be
sure not to glue this panel if you want to be able to change it out. When
screwing down the panel (below), make sure the gasket is compressed
against the frame all the way around.
you have a problem with "sloppy" low frequency response, this should firm it up. In
some cases it may take two resonators tuned
to the same frequency to clean things up satisfactorily.
This particular frequency is also on the border
of low frequencies that are felt, up to 100 Hz or
so, and low frequencies that are heard tonally,
above 100 Hz. At the Editor's request [Guilty
again-MM], I've included some alternate port
When I design a room,
I like to perform a room
analysis which allows me
to design resonators to
address specific problems...
sizes for different trapping frequencies, so you
can build a resonator to tame a bass frequency
that you know to be a problem without having
to do all the math yourself.
The build
The materials-2 x 4 lumber and 3/4" plywood-are commonly available from home
improvement centers. Do not skip caulking all
of the interior joints, as any air leaks will
degrade the resonator's performance. Be
sure to glue and screw it when you build it to
provide maximum rigidity. There's no need to
put any absorbent material in the cabinet-
the Q factor will already be sufficiently low
without it.
62
RECORDING March 2014
Fig. 8. The finished resonator, ready to go to work in your studio.
Recording - March 2014
Table of Contents for the Digital Edition of Recording - March 2014
Contents
Recording - March 2014 - Cover1
Recording - March 2014 - Cover2
Recording - March 2014 - 1
Recording - March 2014 - 2
Recording - March 2014 - 3
Recording - March 2014 - 4
Recording - March 2014 - 5
Recording - March 2014 - Contents
Recording - March 2014 - 7
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Recording - March 2014 - Cover3
Recording - March 2014 - Cover4
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