Cheap Trick CT 227 a PC Loudspeaker with Aurasound Full Range driver as in Klang+Ton 6/06

CT 227 aus Zeitschrift K+T 5/2006
Technical data:
- size (HxWxD): 27.4 x 12.4 x 25.5 cm
- impedance: 8 Ohm
- sensitivity (2.83V/1m): 78 dB
- frequency range (-8dB): 40 - 16 000 Hz
- speaker type: bass reflex
The CT 227 is a PC loudspeaker where the bass reflex port is so to speak hidden under the front foot of the speaker. Yet the construction is quite simple: only 8 small rectangular cut boards are needed.

The CT 227 is equipped with an Aurasound full range driver that is quite impressive. The building instruction by Christian Gather is straightforward and simple - with the exception of a screwdriver and a jigsaw to cut the driver and terminal openings practically no further tolls are needed.

This speaker is also suitable for smaller rooms where it should be placed on the floor or on a sideboard that is below ear level.

Excerpts of the review by Klang+Ton:
... "We never expected such a tight and powerful bass. Up to a volume considerably higher than moderate the Aurasound proved to be convincing and projected bass drum, double and synth bass in an absolutely realistic manner. Typical of a full range driver, bass was distinctive, especially at close range on a desk an amazing sound stage was reproduced. Tonal balance was also impressive. Not equipped with the same level of sensitiveness as the Omnes Audio the CT 227 was rather slightly rough without being blunt. The peculiar sound of the metal diaphragm was definitely noticeable. However, this didn't result in an unpleasantly harsh sound but rather gave the speaker its own character. Moreover, this property only becomes evident when the CT 227 is compared directly with a speaker that is equipped with paper cone driver and shouldn't be regarded as a disadvantage. It's rather a peculiarity giving this Cheap Trick its own identity." ...

Surely, this small full range driver will not perform miracles regarding output levels; but for many applications especially in smaller rooms and for moderate volumes the CT 227 is an interesting and solid solution.
Our kit consists of:

- Aurasound NS3-193-8A full range driver
- 1/2 bag polyester fleece
- 4 x PAN screws 3.5 x 17 mm
- 1 metre cable 2x1.5 mm2
- building instruction
the crossover components (to be mounted on wood):
- 0.33 mH air core coil, 1 mm
- 0.1 mH air core coil, 1 mm
- 10 μF ELCO non-etched
- 2.2 μF MKP capacitor
- 3.9 μF MKP capacitor
- 2.2 Ohm MOX10 resistor (red-red-gold)
- 22 Ohm MOX10 resistor (red-red-black)

Price for CT 227 kit without cabinet per unit: - not available

CT 227 high-end version

The high-end version contains two gold plated brass binding posts instead of cheaper spring terminals. All capacitors have been replaced by higher quality ones: the non-etched 10 μF ELCO was replaced with a MKP/400V capacitor, both MKP with audiophile Mundorf MCAP's.

. The coils remain the same since the standard version uses already ferrite free ones to avoid rest losses.

Price for CT 227 high-end kit without cabinet per unit: - not available

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