Air Tight
ATM-300R
Introduced 2016$16,995 MSRP
Reference single-ended 300B stereo amplifier from Osaka, hand-wired point-to-point and delivering 9Wpc. $16,995 with Electro-Harmonix 300Bs; $19,995 with Takatsuki 300Bs.
MSRP
$16,995
Used market · Excellent
$11,500est.
-32% vs MSRP
as of Aug 16, 2026MSRP to used market
From $16,995 at launch to $11,500 today (estimated).
Specifications
- Type
- Tube stereo power amplifier (single-ended triode)
- Inputs
- 1 pair RCA line inputs
- Outputs
- 4/8/16 ohm speaker terminals
- Topology
- SET, class A; two 300B outputs, two 12AU7, two 12BH7 drivers, 5U4GB rectifier
- Weight
- 54 lbs
- Power output
- 9W per channel
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