LA4 mkIII vs Manley Laboratories Jumbo Shrimp
The Jumbo Shrimp's signal-to-noise is 95 dB against the LA4 mkIII's 90 dB, its thd 0.020% against 0.100%, its output impedance 50Ω against 38Ω, and its class Tube against Solid_state.
AI-generated product photo — not official manufacturer imagery.
AmplifiersPre-AmplifiersTube AmplifiersDiscontinued
About the LA4 mkIII
The Icon Audio LA4 MkIII is a pure-valve, all-triode line preamplifier intended for use with valve or solid-state power amplifiers requiring approximately 1 V or more of input voltage. It uses three 6SN7/CV181 double-triode audio valves, a GZ34/5AR4/274B valve rectifier, a dual-choke HT supply, DC heater supply, point-to-point hand wiring, and a motorized ALPS volume control with remote volume and mute. Connectivity comprises four single-ended line inputs, a tape-monitor loop, record output, and two main outputs. Icon Audio’s preamplifier listings identify the LA4 MkIII as discontinued, although product documentation remains available. Published specifications vary slightly between the product page and manual: the product page states approximately 20 Hz–20 kHz and 100 ohms output impedance, while the manual and independent technical listings report 10 Hz–30 kHz and approximately 38 ohms output impedance. These discrepancies should be verified with Icon Audio for a particular unit or revision.
Specifications
Power Specifications
Amplification power output and characteristics
- Amplifier Class
- solid_state
Analog Output
Analog signal output specifications
- THD
- 0.100%
- SNR
- 90 dB
- Output Impedance
- 38Ω
- Max Output Voltage
- 30.0V RMS
Connectivity
Input and output connections
- Bluetooth
- No
- Wi-Fi
- No
- Ethernet
- No
Specifications are community-contributed and may not be accurate or complete. Verify all details with the manufacturer before making purchasing decisions. Terms & Conditions