Напольная акустика — Duntech MARQUIS

The Marquis is a floorstanding loudspeaker from Duntech Audio of Lugarno, New South Wales, Australia, a company founded in the 1980s by physicist John Dunlavy. Like every model in the Duntech range, it uses a time aligned arrangement of five drivers, and it sits below the Princess and Sovereign in the current lineup alongside the Senator and DSM-15.

Key specs that matter

Two 210 mm (8 inch) bass drivers, two 100 mm (4 inch) midrange units and one 25 mm (1 inch) tweeter share a first order network. On the tweeter axis at 3.5 m, the rated response is 45 Hz to 20 kHz within 2 dB. Efficiency is 92 dB SPL at 1 m with 2.83 volts, and nominal impedance is 4 ohms with a variance from 3.0 to 6.0 ohms. Peak power handling for 10 ms is 500 watts, and Duntech sets a minimum of 60 watts RMS per channel for the amplifier. Harmonic distortion stays under 0.5% above 70 Hz, propagation time error is below 10 microseconds, and the phase shift stays within plus or minus 25 degrees between 130 Hz and 15 kHz. Each cabinet stands 1490 mm high, 272 mm wide and 469 mm deep and weighs 53 kg.

Engineering and use context

Diecast magnesium frames hold the bass and midrange units. The woofers use a vented magnet system and a coated pulp paper cone, while the midrange units have a double magnet design and a rubber suspension for low resonance. The tweeter is a double chamber dome type with a fabric diaphragm, cooled and damped by ferrofluid. Each driver has its own sealed enclosure inside the cabinet, whose size was matched to what the drivers need, and acoustic felt shaped to the enclosure geometry controls diffraction around the drivers. The grille is covered in acoustically transparent black cloth, and the cabinet is hand finished in wood veneer, with Brazilian Rosewood, Black Oak and Jarrah listed as options.

Pairing

The gold plated terminals accept banana plugs, spades or bare cable and are arranged for bi-wiring, so owners can run separate cable pairs to the bass and upper sections. Passive bi-amplification is also supported, which lets a pair of stereo amplifiers split the load between low and high frequencies. The impedance dip calls for an amplifier comfortable with low loads, while the high efficiency means that the recommended minimum power already provides a useful margin. Measurements quoted by Duntech were taken at an ambient temperature of 23 degrees Celsius.

Alternatives

The Duntech Sovereign is the larger seven driver floorstander of the range, with two 300 mm woofers reaching down to 27 Hz.