LM-84IA Vacuum Tube Integrated Amplifier
- Amplifier Type: Vacuum Tube Integrated Amplifier
- Circuit Design: Push Pull Class AB
- Power Output: 12W + 12W
- Tube Complement: 1 × 12AX7, 2 × 12AU7, 4 × EL84
- Output Transformer: Custom Wound Output Transformer
- Analog Inputs & Outputs: 2 × Line In (RCA, L/R), 1 × Sub Out (2 × RCA, L/R LF)
- Speaker Outputs: 2 Channel Stereo (L/R), 5 Way Binding Posts
- Taps Per Channel: 0 Ω (Common/GND), 4 Ω, 8 Ω
- Operation & Control: Remote Controllable
LM-84IA Vacuum Tube Integrated Amplifier
PureTube Sound, Timeless Musicality
Engineered for uncompromising vacuum tube audio fidelity, the LM-300IA PLUS combines classic single-ended topology, premium hand-built construction and audiophile-grade components to deliver a warm, immersive listening experience true to the Line Magnetic heritage.
Electronic Specifications
- Power Output: 12W + 12W
- Frequency Response: 20 Hz – 30 kHz (-1 dB)
- THD: 1% (1 kHz)
- S/N Ratio: 87 dB
- Input Sensitivity: 250 mV
- Input Impedance: 100 kΩ
- Output Impedance: 4 Ω, 8 Ω
- Power Requirements: ~ 115 V/120 V/220 V/230 V/240 V ±5% (50 Hz / 60 Hz)
- Tube Complement: 1 × 12AX7, 2 × 12AU7, 4 × EL84
- Power Consumption: 100 W
- Working Conditions: Temperature: 0 ℃ – 40 ℃; Moisture: 20% – 80%
- Storage Conditions: Temperature: -20 ℃ – 70 ℃; Moisture: 20% – 90%
Weights & Dimensions
- Dimensions (W × D × H): 440 mm × 425 mm × 230 mm (17.31" × 16.75" × 9.06")
- Net Weight: 37.6 kg (82.9 lb)
Application
- Daily leisure: Vinyl records, Hi‑Fi music appreciation, background listening
- Home audio: High‑fidelity home listening room, dedicated audio corner
- Audiophile session: Music appreciation gatherings, record sharing parties
- Work & creation: Music production evaluation, audio tone reference
- Relaxation time: Late‑night listening, quiet immersive music enjoyment
Design
- Type: Vacuum‑tube integrated amplifier
- Chassis: Sturdy metal chassis, classic retro layout
- Transformer: Hand‑wound EI output & power transformers
- Tube complement: Swappable vacuum tube sockets
- Construction: Point‑to‑point hand‑wired build
- Finish: Brushed metal
Analog Inputs & Outputs
- 2 × Line‑in (RCA, L/R)
- 1 × Sub‑out (2 × RCA, L/R low‑frequency output)
Speaker Outputs
- 2‑channel stereo (Left / Right), 5‑way binding posts
- Taps per channel: 0Ω (Common/GND), 4 Ω, 8 Ω
One‑year warranty for the complete unit, and six‑month warranty for vacuum tubes.
Products purchased online or from authorized local dealers and still within the warranty period are eligible for warranty service upon presentation of a valid purchase receipt.Purchases made from unauthorized dealers are NOT eligible for warranty service.
Call us: (+852) 8480 1098
Email : info@lm-audio.com
EL84 Class AB Push Pull Amplification Stage
The output stage utilises four EL84 power tubes running in Class AB push pull operation, striking a fine balance between ample driving headroom and rich harmonic richness. The preamplifier section employs one 12AX7 and two 12AU7 tubes, delivering clean, linear gain while faithfully preserving the natural tonal signature of your source material.
Custom Engineered Exclusive Transformer System
Power performance centres around a custom built toroidal power transformer purpose made for the LM 84IA, delivering clean, stable power with ultra low magnetic leakage. Matched with premium wide bandwidth EI output transformers, it unlocks extended full range frequency response and maintains consistent sonic performance across all volume levels.
Intuitive Operation & Built In Speaker Protection
Supplied with a dedicated remote handset, the amplifier lets you adjust volume and switch inputs comfortably from your listening position. An integrated 30 second power on mute delay suppresses power up inrush current, shielding your speakers from damaging voltage spikes and enhancing long term system reliability.
Practical Layout & Versatile Expandability
A built in headphone output enables high fidelity private listening without requiring an external headphone amplifier. It also features a tool free plug in tube cover: it shields against high tube operating temperatures for safe daily use, and can be quickly removed for convenient tube rolling and routine maintenance.
Warm, Polished Sonic Character
Staying true to the beloved sonic traits of EL84 tubes, the LM 84IA produces a sweet toned, smooth and warmly musical presentation. It features lush midrange, refined non fatiguing treble and taut, natural bass. It shines with vocal jazz, acoustic folk, small scale classical and mellow pop, making it an ideal core component for desktop near field and small room hi fi systems.