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The way I remember the switches is the top switch is for the hi freq and the bottom switch is for the mid (or lower) freq. With the switches away from each other (top switch up and bottom switch down) is the flat or natural setting.
Put the top switch down and you lower the highs.
Put the bottom switch up and you raise the mids.
I only received two plugs with mine. The only time I take them out might be outdoors when I'm not on a raised platform. Otherwise they are always in. Plenty of bass with two in and the low end seems easier to control.
I'm still trying to figure out the switches but I think I like it with two plugs out best. It sounds good with them all in but with just two, I think it sounds better. Another amp that works really well with it is my very old GK 800RB.
So far, I haven't found a setting that I like with the TH500. It just doesn't seem to be a good match.
The 1203 has one port, so I'm sure it is quite different. I would assume you would have to be playing and a higher volume to notice a significant difference.
To my ears with the ThunderChild cab, opening and closing the ports has a much greater impact on the sound than the mid switch. To be honest, I have a hard time hearing any difference with the mid switch. At least at bedroom levels.
This morning before I plugged in, I checked to see where I had the switches from last night. I had them set in opposite directions so that means flat. I think that works for me. The GK 800RB sounds really good with this cab.
The funny thing is that I actually turn up the treble with this cab. I'm usually turning the treble down or off.
I played an outdoor gig last night using my TC and my new Demeter head (I've only played it on two gigs). Sound check went well and the gig started fine. I noticed part way thru, I was hearing a sound that wasn't right. Could have been a blown speaker or maybe something was distorting with the new head. The stage volume was getting louder as the gig progressed.
Today in my basement, I could duplicate the sound. I check the batteries in the bass and they were fine. I tried a different (smaller) head. It didn't sound as bad but not perfect. I took the amp off the cab to see if something in the head was vibrating but that didn't help.
Along the way, I moved the head off the hard floor onto a carpet and the sound went away. I tried putting down the tilt back handle on the bottom and the sound went away. Sure enough, it was the handle vibrating. It was the combination of not extending the handle and playing louder than normal.
If only all the fixes were this easy.
I have had a problem with the Aguilar GS handles (spring loaded) vibrating at very high volumes. It happens mostly with me goofing off in the music room playing along with music through the PA at high volumes. Never had it happen live in a band setting.
The handle on the cab or the amp?I played an outdoor gig last night using my TC and my new Demeter head (I've only played it on two gigs). Sound check went well and the gig started fine. I noticed part way thru, I was hearing a sound that wasn't right. Could have been a blown speaker or maybe something was distorting with the new head. The stage volume was getting louder as the gig progressed.
Today in my basement, I could duplicate the sound. I check the batteries in the bass and they were fine. I tried a different (smaller) head. It didn't sound as bad but not perfect. I took the amp off the cab to see if something in the head was vibrating but that didn't help.
Along the way, I moved the head off the hard floor onto a carpet and the sound went away. I tried putting down the tilt back handle on the bottom and the sound went away. Sure enough, it was the handle vibrating. It was the combination of not extending the handle and playing louder than normal.
If only all the fixes were this easy.
My cab doesn't have have one.I didn't look to see if there was one on mine or not.