ZH230 vs Linear Tube Audio ZOTL40 Reference+
The ZOTL40 Reference+'s power @ 8ω is 46W against the ZH230's 30W, its power @ 4ω 51W against 36W, its thd 0.500% against 0.300%, and its output impedance 1.6Ω against 1Ω.
AI-generated product photo — not official manufacturer imagery.
AmplifiersPower AmplifiersTube Amplifiers
Estimated price (community-sourced)
$2,528 - $8,360
Around — community and catalog average, updates slowly
About the ZH230
The David Berning Company ZH230 is a dual 30-watt stereo power amplifier using David Berning’s ZOTL (Zero-Hysteresis Output Transformerless) technology. It is designed to provide faithful amplification with automatic biasing for various tube combinations, constant output impedance behavior, and high reliability. Review coverage describes it as an updated lower-power successor to the older ZH-270, with a switched-mode power supply, fully balanced amplification circuitry, and tube rolling flexibility. The model was available with a listed price of $8,360 in one review and $8,630 in another source.
Specifications
Power Specifications
Amplification power output and characteristics
- Power @ 8Ω
- 30W @ 8Ω
- Power @ 4Ω
- 36W @ 4Ω
- Amplifier Class
- tube
- Minimum Impedance
- 4Ω
- Input Sensitivity
- 0.4V RMS
- Input Impedance
- 50Ω
Analog Output
Analog signal output specifications
- THD
- 0.300%
- Output Impedance
- 1Ω
Connectivity
Input and output connections
- Bluetooth
- No
- Wi-Fi
- No
- Ethernet
- No
- Analog Inputs
- RCA
- Analog Outputs
- speaker terminals
Physical Dimensions
Size, weight, and appearance
- Dimensions
- 300 × 170 × 420 mm (W × H × D)
- Weight
- 7 kg (15 lbs)
- Available Colors
- anodized silver
Key Specifications
Power: 30W
Specifications are community-contributed and may not be accurate or complete. Verify all details with the manufacturer before making purchasing decisions. Terms & Conditions