More 2-way Altecs

ICTWoody

Junior Member
If you are still stuck on the PP vs SE question, @ICTWoody, perhaps you could split the difference and look into PP DHT amplifiers (e.g. PP 300B). Maybe something like this: "Fatboy" 300B Push-Pull Amp

I'm not really stuck on it. I've owned plenty of SE amps. I owned the Redboy Built EL84 SEP's, I have my Dennis Had Inspire SE amp, I had the Larry Moore 300B amps, Icon Audio MB30SE's etc...

Right now its more lower watt tubes vs. big ballsy Mac SS just cause I have never tried a bunch of power on the Onk's. I'm very happy with the A&S amp... but for fun... since the MC2205 is just sitting there about 20ft away. :-)

- Woody

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Right now its more lower watt tubes vs. big ballsy Mac SS just cause I have never tried a bunch of power on the Onk's. I'm very happy with the A&S amp... but for fun... since the MC2205 is just sitting there about 20ft away.
It might also be a matter of zeroing in on the right amplifier damping factor. Onkens and other bass cabinets with Ultraflex genes are especially fussy about output / source impedance. If your Onkens were built “by the book,” then they’re probably sized/tuned suboptimally for those passive crossovers and tube amps (especially single-ended). For starters, they want to see a very low total series resistance on the order of ~0.1R. (Apparently, this is something that got lost when the original articles were translated from French and condensed—or so I’m told by people who know French.)

Here’s some (different) forum discussion I found once and took a screenshot of—original source is lost:

64DAA2F4-E1AC-4EAF-BF2C-ACA3CD7416BC.jpeg

Your MC2205 seems to be in the ballpark:

365A1A3A-4B0B-4EE9-84C1-8D53A594462E.jpeg

Finally, here’s a classic implementation:
lecleach.htm
 
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