Duetta Top - detached from the large Duetta reference loudspeaker
the midrange / tweeter unit tuned into a shelf speaker as in K+T 3/2002

Duetta Top
Technical data:
- impedance: 8 Ohm
- rated SPL: 85 dB
- frequency range (-3dB): 58-20 000 Hz
- crossover frequency: 2.2 kHz
- size (HxWxD): 39.4 x 24.4 x 36.4 cm

This small 2 way bass reflex speaker can also be used as a sealed cabinet speaker. There is an excellent internal bracing (pictured below right) to prevent natural oscillation.

After the reference Duetta made an exceptional impression (see K+T 1/2002) the K+T team set itself the goal to develop a smaller speaker for smaller rooms. Here is the result (and in K+T 3/2002). Duetta

Review by Klang+Ton:
"In our listening room the Duetta TOP showed the expected sensitivity with regard to recording quality of the CD's played as well as the electronics used. Any flaw in the transmission chain was ruthlessly disclosed. When everything was fine, however, the sound quality - with the exception of bass - was on the same level as the Duetta."
 

The kit consists of (without compensating circuitry):
- the Eton ER4 Air Motion Transformer
- the Eton 7-360/37 HEX midrange / bass driver
- 2 HP 50 bass reflex tubes , shortened to 14.5 cm
- no damping material (as per building instruction)
- 1/2 pack MDM-5 sealing tape
- a screw set (or 16 PAN screws 4x20)
- 1 pair Au binding posts
- 2 metre cable 2x1.5 mm2
- the building instruction 		a crossover kit to be mounted on wood
- 1.8 mH Mundorf CFC 14 coil (upon request also Tritec coil)
- air core coils: 0.33mH/0.7mm and 0.47mH/0.7mm
- Mundorf 4.7 uF audiophile MKP, 400 V
- 10 uF audiophile MKP, 400 V
- 1.5 uF audiophile MKP, 400 V
- 2 x 3.9 Ohm MOX10 resistor (orange-white-gold)
- 2.7 Ohm MOX10 resistor (red-purple-gold)

Price per unit without wood:   EUR 483,00

... or the kit as above but with absolute high-end crossover with impedance correction, consisting of:

- 1.8 mH Mundorf CFC 14 coil (upon request also Tritec coil)
- baked varnish coils: 0.33mH/0.9mm and 0.47mH/0.9mm
- air core coil: 1.0 mm/1.0mm
- Mundorf 4.7 uF audiophile MKP, 400 V
- Mundorf 33 uF audiophile MKP, 400 V
- 10 uF Jensen ALU oil paper
- 1.5 uF Jensen ALU oil paper
- 2 x 3.9 Ohm MOX10 resistor (orange-white-gold)
  for R1 and R3: the diagram indicates the wrong values
- 2.7 Ohm MOX10 resistor (red-purple-gold)
- 8.2 Ohm MOX10 resistor (grey-red-gold)

Price per unit with high-end crossover without wood:   - not available

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