What I like most about the quality of the sound these speakers with a very linear sound very precise striking is good BSSE these often the case with APG.
Such an enclosure with passive channel 3 for the upper part of the same component of the DS15 (C0107 engine and PHL5340 38cm) otherwise the Hp for the lower spectrum PHL5060
The two 38 cm PHL reproduce the medium and severe the DS215 + DS15 corresponds to a small box ideal for small configuration or she's going aditional box