i have sealed midrange pods, i wanted to see what the different usual suspects had for an impact on midrange frequencies.
i also wanted to see how they compared to no deadening in the enclosures.
so i grabbed some fiber mat and blackhole tiles from resonix. i already had denim installed.
so let's start with the pictures:
empty enclosure:
blackhole-tile installed:
batting installed:
and finally denim installed. it was typical for both sides but i forgot to take pictures of the passenger side while it was apart:
microphone setup:
Setup:
- Ambient temps like 55*f in the garage.
- Scanspeak 12m in the sail pods.
- Mic is about 0.5m from the front of the speaker, facing the speaker
- Sound generated by REW through a Topping D10, toslink/spdif from the D10 to PS8Pro DSP
- Volume controlled by the computer.
- All speakers muted but the midrange
- All measurements were done w/ the newer driver, doors closed
- Measurements were done w/ a 250hz high-pass crossover. No low-pass crossover
- EQ work was my usual SQ tune but unchanged for this mic position
- Volume was the same on all the measurements
- Between tests and changing deadener, I ran 85db of sweeps for 15min to warm the suspension and coil back up.
Deadeners tested:
- One measurement loosely filled denim, new midrange (new-rmid-denim)
- One measurement with no deadener installed (new-rmid-empty)
- One measurement with the enclosure lined with Resonix fiber mat. About 76 sq inches installed. (new-rmid-batting)
- One measurement with a blackhole tile cut to fit. One half of a tile was fit to one side, the other half was cut into quarters and fit on the other side (new-rmid-blackhole-tile)
REW measurements were default signal generation.