| Audio Tweaks - Tweak Ref.
331 |
|
|
| |
| Use your chimney for amazingly true bass |
| |
| 331 |
Rob Roth |
Excellent |
$300.00 |
| |
| Acoustics textbook |
Chimney Woofer |
| |
| If, like me, you have an unused fireplace in your listening area you can use the chimney flue as an awesome woofer. Typical chimney lengths are 20-30+ feet; this corresponds to low 30 hz wavelength. A modest woofer will produce dramatic results since you are providing a natural resonance chamber. |
| |
| Experiment with sealing the rooftop end to tighten bass and prevent debris from entering the chamber. Mount woofer tightly to a baffle board (3/4" plywood) which is cut to the flue size. Attach and seal baffle board over flue using standard DIY techniques. Make sure edges are caulked. Wire using heavy gauge wire. |
| |
| You will have to experiment with volume levels to integrate with the rest of your system. Some of us have also "lined" the flue with absorbent materials, but the additional value may not be worth the trouble. |
| |
| The principle here is the same as in a pipe organ. Consult an acoustics handbook for a discussion of half and full diaspon pipes (closed and open pipes, respectively). Since the resonance chamber is already tuned and open you will not need very much power to achieve true lowest octave extension. Works best in longer chimneys, obviously, but even 20 feet will give you phenomenally tight bass in the 40 hz range.
This tweak may seem like a lot of trouble, but is the only 'natural' way to achieve low bass. |
| |
|
| |
|
| |
|
|
| |
|
|
|
