Smolder wrote:Two question...
If your doing a tap to a separate power amp from a twin, does pulling the tubes take care of the lack f load on the output transformer? Also, doesn't that raise the voltage to the rest of he circuit?
Second - is the use of head units to a 2x12 cab for tone or for looks? Why not leave he JBL 12's in the twin cab?
Thanks in advance.
Smolder wrote:Thanks man. I've read that info several times. The closest it come is:
"a.) regular preamp tap on one or both channels - a mono plug will short the ring to ground of the 14b jack. if either preamp tap is used with a mono plug the power section is rendered dead. "
I'm actually pretty content with the twin at half power with one D120. I have E's but put them in some floor monitors as I really prefer the alnico speakers. I planned to pull he chassis for another mod and thought I'd do the simpler pre tap in the event that I came across a Mac deal I could not pass up.
Smolder wrote:Second - is the use of head units to a 2x12 cab for tone or for looks? Why not leave he JBL 12's in the twin cab?
hippieguy1954 wrote:Second - A head and a seperate cab is lighter because you can carry them seperately. Have you lifted a twin with 2 E120"s? It ways a ton! Each E120 is 50lbs!
SarnoMusicSolutions wrote:I recall Healy telling the story about how in the late 60's they'd totally re-tube Jerry's Twins and he loved the sound, but then just 2 gigs later that tone was gone and he'd complain. So they figured out real fast that tubes IN a combo amp get beat to hell by the vibrations of the speakers being so close and in the same cabinet. That vibration just destroys that refined, detailed fidelity of fresh tubes. So they moved on to where half the Twins were amps only and the other half were simply cabinets. According to him, it may look like a lot of tie-died Twins in photos, but only half of them were actually powering the other half.
Keeping tubes out of combo amps greatly extends their life and their tone.
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