Off. Off. Air Tight ATM 4 6L6 tube amplifier/ integrated amplifier

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grannyring

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This unit is in great condition and just back from a complete check up from authorized dealer. One tube needed to be replaced. Cleaned internally, bench tested and operating as she should. Can be used as an amp or integrated amp. Previous owner had amp in storage over 10 years. Special find for sure.

Runs as quiet as a mouse and sounds sublime. A breeze to bias. The top cage has some marks as shown in the pics. The rest of the amp looks very good and the face is absolutely clean.

24 watts per channel and some of the best quality transformers available. This is not a slow, overly warm sounding tube amp with bloated bass. Rather, this amplifier has a highly resolving, fast, intimate sound with uncanny realism and nuance. This amp will put the performance in your room with class leading purity and tone. Bass is very articulate and fast.

I have compared this amp to $25,000 new tube amplifiers and found it absolutely competes bettering most tube amps, regardless of cost, in resolution, inner detail and purity of tone.

No humming, buzzes or stray noises out of my 96bd efficient Fyne 704 speakers. Very quiet with my ear up against the drivers.

All point to point wired with top flight parts. Just a beautiful build internally and rarely matched today. I have included pictures for you to view.

Valves employed: 6L6GC × 4, 6FQ7 × 2, 12AT7 × 1
Rated output: 24W + 24W (8 ohms), 48W (mono, 8 ohms)
Features: Input selector (2 inputs), left/right attenuators to control volume, stereo/mono selector
Dimensions: 380(W) × 340(D) × 205(H) mm
Weight: 23 kgs


Invoice showing work done by tech,

Air-Tight ATM-4 sn: 08112 in original box received via UPS. Problem: no particular problem, it has been in storage for > than 10 years
Job description:
-Tested all internal components - all good.
-Repaired and updated bottom and top cabinet hardware. -Tested all tubes - all good except 1 x 12AT7.
-Serviced tube sockets.
-Installed new old stock 12AT7 (tested several to get the best matched).
-Performed general maintenance.


I have the manual, box and original packing. I prefer not shipping and welcome a pick up here in the Nashville area. Shipping is possible. Willing to drive to meet the buyer in a middle location.

I no longer take PayPal and accept cash, cashiers bank check, bank transfer, Zelle.

Thank for looking and good luck!

Bill






















« Last Edit: 11 Jul 2022, 03:56 am by grannyring »

dburna

Re: Air Tight ATM 4 6L6 tube amplifier/ integrated amplifier
« Reply #1 on: 6 Jul 2022, 12:41 pm »
I haven't heard the ATM4, but I had an ATM2, and the workmanship and quality on Air Tight products is superb. GLWS -- I am certain someone will be delighted with this.       -dGB

audiojem

  • Full Member
  • Posts: 559
Re: Air Tight ATM 4 6L6 tube amplifier/ integrated amplifier
« Reply #2 on: 7 Jul 2022, 01:12 am »
PM Sent.