Phil Jones의 베이스 캐비닛 위치 잡기 팁

If you want to get a fuller and more even bass response in your rig, it could be down to where you position your cabinets. On many gigs it may not be possible to have a choice of where you put your bass amp but if you can have some control over this you may want to read this.
First I want to explain that EQ is nothing more the frequency selective gain controls. In other words when you boost your bass control or EQ slider, the amp will deliver more power into your speakers at those frequencies. Likewise when you cut back a control, you amp will have less power there. 
Boosting you bass control say 6dB up will make your amp work 4 times harder at that frequency range. So if you are maxing out your 200 watt amp with EQ set flat , dont expect to boost those frequencies that much without getting gross distortion.
While mid range and high frequencies coming from your cab are quite directional, ( just like a car headlamp), the bass frequencies are going in all directions. This is to do with the acoustic wavelength they are producing in comparison to the size of the cabinet.
An open E string on a bass is 41.2Hz equating to a 27feet 4 inch wavelength. An open B string fundamental is almost 36 feet in wavelength. So you see a lot bigger than any dimensions of your cabinet and this causes the propagated waves to be omni-directional.
So if you had you cab around 6-8 feet from a back wall, the wave will leave the cab front and also from the back, bounce off the wall and be exactly out of phase with the wave from your speaker on the open E string. In other words the cabinet is fighting the sound bouncing off the wall. So if you moved it closer you would still get some out of phase cancellation but at a higher bass frequency.
Placing the cabinet right up against the wall will mean that all the sound is moving forward, and even better if you place it in a corner.
There are other issues with sound bouncing off the other walls and ceiling but the further the wall or ceiling is away, the less energy there is to bounce back and fight with your rig. 
Dont be fooled that some kind of sound absorption material can control the bass frequencies, it simply cannot function down there unless it is about 5 feet thick!
Placing the amp in a corner will guide the bass sound into an even tighter focus. the sound is now going into a 90 degree arc not 360 free space and 180 against a wall. If you had a really acute angle corner like a stage I used to play on in Cardiff, Wales (now bygone days of the New Moon club ), a flat iron shape building. The cabinet in a corner like this can function like a horn loaded cabinet transferring the slow velocity/high pressure motion of the cone to the much higher velocity of the sound wave. In other words LOUDER for less watts.
If you have a huge cab and lots of power and extensive EQ then you may have enough headroom to get a great tone anywhere but this technique of using good positioning close to walls will work really well on smaller cabs and less powerful amps. You may find that you need a lot less bass boost and this will do two things 1:give more headroom and 2: you speakers will work less hard, giving them a longer life. 
Maybe with this technique of careful amp positioning, you dont need a sledgehammer to crack a nut!

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