COA 6/1 XT

COA 6/1 XT Kontur Sub by ASE, Gerd Lommersum in Hobby HiFi 2/2006

Technical data:
- impedance: 6 Ohm
- minimum impedance: 5.2 Ohm/9 kHz
with impedance correction: 4.2 Ohm/8 kHz
- rated SPL (2.83V/1m): 85.5 dB
- satellite size
(HxWxD): 44 x 22.5 x 33.6 cm
- subwoofer size
(HxWxD): 46 x 34 x 41.7 cm
- frequency range Sat (-3dB): 55-25 000 Hz
- Frequency range (-3dB): 23-25 000 Hz
- crossover frequencies: 75, 2750 Hz
- speaker type, satellite: bass reflex
- subwoofer type: closed cabinet

COA 6/1 XT Kontur Sub, that's a coax driver and a subwoofer with Vifa 26 WA 550/4, both designed by Gerd Lommersum.

Gerd Lommersum had the brilliant idea to remove the dust cap of a Vifa 17 CN 225/8 with pole piece hole and replaced it with a XT 300/K with a small horn: the ASE 17 CN 225/8-XT was born. This combination we offer for around 190 EUR.

An excerpt of the Hobby HiFi review:

..."After the best location and set-up had been determined the trio performed like a uniform and integrated whole. There was no audible gap between the subwoofer and the satellites. Initially the system disappointed somewhat by playing rather unobtrusively. Continued listening, however, showed a sound that was regarded as pleasant and natural. During longer listening sessions this set-up really pays off: no listening fatigue came up and it became easier to tune into the music. Subtle details were not handed on a plate, the performance was rather unobtrusive. Nevertheless, the presentation of details was convincing.

Three-dimensionality
Width and depth of the sound stage is stable, wandering vocals and instruments just don't exist. This is the main advantage of a coax driver. Sure, there are loudspeaker systems offering more width and depth like e.g. the excellent Cumulus Horn (HOBBY HiFi 6/2005). But then, we have to consider the enormous deployment of material. There are, probably, ways to improve on the ASE Coax' three-dimensionality - the crossover still has some scope for improvement." ...

Verdict: "With his COA 6/1- XT and the Kontur Sub, Gerd Lommersum once again hits the bull's eye. These speakers are extremely musical and offer a stable imaging, typical for coax systems. And the subwoofer is also worth considering in conjunction with other satellites."...

Our kit consists of

The satellite
- ASE 17 CN 225/8-XT
- the original, assembled crossover by ASE
- a HP 50 bass reflex tube
- 1.5 m cable 2x2.5 mm2
- a terminal with gold plated brass binding posts
- 8 screws PAN 3.5 x 17
- a Pack Polyester Dämmstoff
- the building instruction

Satellite price without cabinet
per loudspeaker EUR 214,00

The subwoofer

- Vifa 26 WA 550/4 bass driver
- an Inosic subwoofer module RAS 200 plus
with 160/300 Watt into 4 Ohm
- 8 screws PAN 4 x 20
- 2 packs polyester fleece
- 1 m cable 2x2.5 mm2
- the building instruction

Subwoofer price without cabinet
per loudspeaker - not available

or if you wish to use a high-end crossover for the satellite.

High-end satellite COA 6/1-XT with crossover components

High-end version like standard version, with the exception of terminal, cable and crossover:
- Bi-wiring terminal with 4 gold plated brass binding posts
- 2 metre cable with silver plated copper wire: Oehlbach Silverline (****) 2x2.5 mm2
- large universal PCB for mounting the crossover components
- 2.2 mH air core coil, 2 mm wire
- 3.3 mH T-core coil
- 0.27 mH baked varnish coil, 0.9 mm
- 0.18 mH air core coil, 0.7 mm *)
- 5.6 uF MKP capacitor
- 1.0 uF MKP capacitor
- 3.3 uF Mundorf MCAP Supreme 800 V
- 33 uF ELCO, etched *)
- 15 Ohm MOX10 resistor (brown-green-black)
- 3.3 Ohm MOX10 resistor (orange-orange-gold)
- 8.2 Ohm MOX10 resistor (grey-red-gold)
- 6.8 Ohm MOX10 resistor (blue-grey-gold) *)

High-end kit COA 6/1-XT Satellite without cabinet
Price per loudspeaker EUR 318,00

*) Please note: this high-end kit comes with impedance correction. These components
affect the quality only marginally; we have, therefore, chosen reasonably priced components.

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