Aleph 5 vs First Watt F4
The F4's power @ 8ω is 100W against the Aleph 5's 60W, its power @ 4ω 50W against 90W, and its damping factor 40 against 50. Both share thd (1.000%).
AI-generated product photo — not official manufacturer imagery.
AmplifiersPower AmplifiersDiscontinued
Estimated price (community-sourced)
$2,200
Around — community and catalog average, updates slowly
About the Aleph 5
The Aleph 5 is a classic stereo amplifier from Pass Labs, designed by Nelson Pass. It features a simple two-gain-stage topology with pure single-ended Class A operation, resulting in a direct signal path and minimal distortion. The amplifier uses MOSFET output devices and a patented current source topology, optimizing performance across a wide range of speaker impedances. The Aleph 5 is known for its harmonic richness, midrange bloom, and smooth yet detailed high frequencies, often compared favorably to high-end tube amplifiers. It runs very hot and requires ample ventilation. The build is robust, with a large toroidal transformer and substantial filter capacitance. The back panel includes both single-ended RCA and balanced XLR inputs, as well as gold-plated binding posts. Pass Labs offers factory support for all Aleph series amplifiers.
Specifications
Power Specifications
Amplification power output and characteristics
- Power @ 8Ω
- 60W @ 8Ω
- Power @ 4Ω
- 90W @ 4Ω
- Amplifier Class
- A
- Damping Factor
- 50
Analog Output
Analog signal output specifications
- THD
- 1.000%
Connectivity
Input and output connections
- Bluetooth
- No
- Wi-Fi
- No
- Ethernet
- No
- Analog Inputs
- RCA, XLR
- Analog Outputs
- Gold-plated binding posts
Physical Dimensions
Size, weight, and appearance
- Dimensions
- 304.8 × 266.7 × 304.8 mm (W × H × D)
- Weight
- 27.22 kg (60 lbs)
Key Specifications
Power: 60W
Specifications are community-contributed and may not be accurate or complete. Verify all details with the manufacturer before making purchasing decisions. Terms & Conditions