Linear Tube Audio
ZOTL40 Reference+
Introduced 2023$6,800 MSRP
Flagship output-transformerless power amplifier built on David Berning's patented ZOTL circuit, producing 46Wpc into 8 ohms from four EL34s.
MSRP
$6,800
Used market · Excellent
$4,500est.
-34% vs MSRP
as of Aug 16, 2026MSRP to used market
From $6,800 at launch to $4,500 today (estimated).
Specifications
- Type
- Tube stereo power amplifier (output-transformerless ZOTL)
- Inputs
- 1 pair Cardas RCA
- Outputs
- Cardas speaker binding posts
- Topology
- Push-pull EL34 (x4) with Berning ZOTL impedance conversion; two 12AX7, two 12AU7
- Weight
- 17 lbs
- Power output
- 46W per channel into 8 ohms (51W into 4 ohms)
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