The Heco SM 520 is a compact bookshelf speaker characterized by its robust build and audio performance. designed for versatile use in various audio setups, its sleek design allows it to blend seamlessly into home environments. The speaker features a 5-inch woven woofers and a 1-inch soft dome tweeter, providing a balanced sound profile with clear highs and adequate bass response. The cabinet is constructed from medium-density fiberboard (MDF), contributing to reduced resonance and improved audio clarity. It has a power handling capability of approximately 80 watts and an impedance rating of 8 ohms, making it an excellent match for a variety of amplifiers. The frequency response ranges from around 40 Hz to 25 kHz, allowing for rich sound across the audible spectrum. The rear-ported design aids in extending the low-end frequency performance, while various finishes are available to suit different aesthetic preferences.