Bookshelf Speakers — System Audio Signature 5

The Signature 5 is the compact passive stand-mount in the Signature line of System Audio A/S, the Danish company based in Roskilde and founded in 1984 by Ole Witthøft. The maker lists it at EUR 999 per pair and describes it as a compact bookshelf speaker for shelf, stand or wall placement. It sits in the wired part of the catalogue next to the Signature 6 on-wall model, the Signature 10 centre, the Signature 40 floorstander and the Signature Sub 8.

Key specs that matter

System Audio built it as a 2-way bass reflex box with two drivers. A 1 inch Signature DXT tweeter handles the top, while a 5.5 inch Signature 15/4 unit covers bass and midrange. System Audio gives a frequency range of 40 Hz to 25,000 Hz, a nominal impedance of 4 ohm and a sensitivity of 88 dB at 1 W and 1 m, with power handling rated at 150 W. The cabinet measures 16.5 cm wide, 30 cm tall and 24.9 cm deep. Buyers choose white satin or black satin, and the speakers ship as a pair with fabric front grilles and a manual in the box.

Engineering and use context

DXT refers to the lens fitted around the tweeter, a feature System Audio uses across its ranges to widen the dispersion of the treble unit. The 15/4 driver is shared with the Signature 40, where the same unit works as the dedicated midrange above two 15/6 woofers, so the small box carries the same midrange hardware as the tower of the series. This is a purely passive speaker with no built-in electronics, fed through standard speaker terminals from an external amplifier or AV receiver. The shallow depth lets it go on a bookshelf, and the maker also approves stand and wall placement. System Audio backs its speakers with a 7-year factory warranty after product registration, and the company sells direct with a 45-day home trial period and free return within that window. For comparison, the bigger Signature 40 rises to 95 cm, is rated at 300 W and 90 dB, and reaches down to 30 Hz with the help of its extra woofers.

Pairing

The low nominal impedance combined with moderate sensitivity points to an amplifier or receiver with current in reserve, and a low-powered tube amplifier is a poor fit. For home cinema use it can join the Signature 10 centre and the Signature Sub 8, which accepts both stereo line level and LFE signals, to build a wired multichannel system from one range.

Alternatives

The Legend 5.2 Silverback DS is an active wireless bookshelf model from System Audio with its own 150 W of amplification, a WiSA HT receiver and a 19 x 32 x 26.5 cm cabinet.