Electrocompaniet PI-2
Norwegian stereo integrated amplifier delivering 2 × 100 W into 8 Ω, with XLR and RCA inputs, for demanding, controlled listening.
Comparison with the observed price of the same product new; this is not a reduction on a previous price.
Description
The PI-2 is a stereo integrated amplifier designed by Norwegian manufacturer Electrocompaniet. It combines preamplification and power stage within a single chassis, allowing sources to be connected directly via balanced or unbalanced inputs to drive a pair of speakers.
Its power output reaches 2 × 100 W into 8 Ω, rising to 165 W into 4 Ω and then 220 W into 2 Ω: this increase in power as impedance drops indicates a power supply capable of delivering current even into demanding loads. The damping factor of 250 reflects firm control over driver movement, particularly useful in the bass. The frequency response spans 1 Hz to 200 kHz, well beyond the audible spectrum, which limits signal alteration at the extremes of the range. The signal-to-noise ratio of 100 dB on line input ensures a quiet background. This power reserve is built on an oversized linear power supply, with a 400 VA toroidal transformer and a capacitance reserve of 80,000 µF.
This type of amplifier suits a user seeking electronics capable of driving low-impedance or low-sensitivity speakers without resorting to a separate power amplifier. The presence of XLR inputs also makes it possible to take advantage of professional or high-end sources equipped with balanced outputs.
Technical specifications
| Power | 2 × 100 W (8 Ω) / 165 W (4 Ω) / 220 W (2 Ω) |
| Inputs | 2 balanced (XLR) + 2 unbalanced (RCA) |
| Frequency response | 1 Hz – 200 kHz |
| Damping factor | 250 |
| Signal to noise ratio | 100 dB (line) |
| Power supply | 400 VA toroidal transformer, 80,000 µF reserve |
What to check before buying used
The volume potentiometer is worth testing across its full range: crackling or channel imbalance at low levels points to an oxidised track, which can be fixed with cleaning but sometimes signals a replacement will be needed. After several decades, the power supply capacitors may have lost capacitance, resulting in reduced dynamics or a slight hum at idle. Also check for the absence of noise when the toroidal transformer powers up and that the speaker protection relays engage correctly.
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