Legendary Air-Tight ATM-1 Tube Amplifier Original Tube Rectified Version-EL-34’S

One of the best from Airtight with Tamura transformers. Their First Tube Amp. Matched with Heathkit WA-P2’s preamps and Altec Lansing Onken 360 Speakers!!!

[@interesting7906]

Sounds great! What compression drivers and horn do you use? What is the horn cutoff? Having the same LF driver and box I now really want to try the Air Tight amp! I have my 2 way woofer cut at 600 Hz and a 300 Hz horn. I suggest you try a different horn larger, lower Fc. You'll be happy with the results.

[@les5309]

Sweet!

[@steveckc148000]

DIY SPEAKER BOX.? Please give details

[@altec1574]

Altec Onken 360 design, (360 liter volume), they are fairly easy to build, There are also different plans online available for building them.
I purchased them as you see them in the video, they also came with wooden horns which can be swapped out with the emilar metal horns