Electrocompaniet ECI-3 Integrated Amp

Description

The Electrocompaniet ECI‑3 is a classic hi‑fi integrated amplifier from the Norwegian brand Electrocompaniet, known for its elegant industrial design and musical, engaging sound. Designed as a high‑performance all‑in‑one amplifier, the ECI‑3 combines a fully balanced preamplifier and power amplifier in one chassis with remote control, multiple inputs, and a sophisticated power supply architecture. Although no longer in production, the ECI‑3 remains widely respected in the used market and among audio enthusiasts for its smooth sonic character and robust engineering.

One of the defining features of the ECI‑3 is its Floating Transformer Technology (FTT) power supply. This proprietary configuration uses a substantial 550 VA transformer and a 40,000 µF current reservoir, providing clean, dynamic power delivery with excellent control and transient response. According to Electrocompaniet, this setup enables the amplifier to deliver 2 × 70 W into 8 Ω, with increased power available as speaker impedance drops — a useful trait for driving a range of speakers. The amp is also stable into very low impedances (down to 0.5 Ω), which suggests strong current‑handling capability.

The front panel of the ECI‑3 features a simple yet refined Navigator display and touch controls, while input switching and volume adjustment are handled via relay switching and a balanced motorized volume control — designed to minimize sonic degradation. The amplifier includes six inputs, including balanced and single‑ended options, making it easy to integrate with a CD player, DAC, tuner, and other sources. There’s even a balanced output that can be used to feed an external power amplifier in a bi‑amp configuration.

Sonically, the ECI‑3 is often described as having a “warm, tube‑like midrange” and smooth, engaging presentation that encourages long listening sessions without fatigue. In user reviews, owners emphasize its ability to produce rich, rhythmic bass, detailed yet relaxed treble, and a natural portrayal of vocals — qualities that help it stand out from many solid‑state designs of its era. One reviewer noted the amp was “easy to listen to… shines with jazz and vocals” and praised it for neutral and fatigue‑free sound that nevertheless leans slightly warm and musical.

Another enthusiast characterized the ECI‑3’s sound as “beautiful tube‑like sound… punchy, precise bass… incredible soundstage and dynamics,” while also acknowledging that the character depends greatly on the speakers and system synergy. This comment reflects a frequent theme in ECI‑3 impressions: pairing it with the right speakers is crucial to fully unlock its strengths.

While the amp’s remote control and appearance draw some mixed opinions — often seen as less luxurious compared to the chassis quality — the overall build quality and performance remain well regarded among vintage and used‑gear buyers.

Product Specifications

• Type: Integrated stereo amplifier, fully balanced topology

• Power Output:

  • 2 × 70 W into 8 Ω

  • 2 × 120 W into 4 Ω

  • 2 × 160 W into 2 Ω

• Power Supply: Floating Transformer Technology (550 VA + 40,000 µF reservoir)

• Inputs: Six inputs (including balanced/CD balanced and single‑ended)

• Balanced Output: Yes (for use with external power amp/bi‑amping)

• Volume Control: Motorized balanced control (relay/remote operated)

• Output Impedance: < 0.01 Ω (20 Hz–20 kHz)

• THD: < 0.005 % (1 kHz @ half power), < 0.006 % (1 kHz −1 dB)

• Nominal Input Impedance: 330 kΩ

• Equivalent Input Noise: < 4 µV

• Dimensions: 483 × 410 × 115 mm (W × D × H)

• Weight: ~12 kg / 26.4 lbs