Floorstanding loudspeakers — Børresen Acoustics Børresen Z5

The Børresen Z5 is a tall floorstander from the Danish firm Børresen Acoustics, a company grouped with Raidho and Ansuz. Within the Z-series it is a somewhat more accessible way into the company's in-house driver technology than the larger M6 or the 05 Silver Supreme Edition.

Key specs that matter

The Z5 covers 25 Hz to 50 kHz within plus or minus 3 dB. Sensitivity is 90 dB, nominal impedance is a demanding 4 ohms, and an amplifier delivering over 50 W is called for. Each Z5 measures 151.0 x 23.0 x 70.0 cm and weighs 75 kg.

Engineering and use context

The Z-series and the numbered 05 series are separate design lines, so the Z5 is not simply a lower tier of the 05 but a different model family built to a similar size.

Pairing

The modest power recommendation and 90 dB sensitivity keep the amplifier requirements reasonable for a speaker of this size, which opens it to a wider range of amplification than many rivals of similar dimensions. The 4 ohm load means the chosen amplifier should handle low impedances with ease.

Alternatives

The Børresen 05 Silver Supreme Edition is a floorstander of similar scale from the separate numbered series.