CC72: M-Horn as in Hobby HiFi 2/07

M-Horn aus HH 2/2007
Technical data
- rated SPL: 88 dB (2.83V,1m)
- frequency range (-6dB): 60 - 23k Hz
- crossover frequency: 2000 Hz
- rated impedance: 8 Ohm
- size (HxWxD): 90.5 x 18.2 x 42.5 cm
- speaker type: exponential horn
The M-Horn is one of the Clever Concept series (CC) designed by Bernd Timmermanns. The CC 72 is a 2 way horn system at an affordable price.

To achieve this favourable price Mivic drivers were chosen:
- the Mivoc HGH 258 FN II tweeter
- the Mivoc WPT 138 midrange / bass driver

Although the ducts look quite complicated it's still relatively easy to build the cabinet since most boards are rectangular; so you can buy the pre-cut wood and use an angle grinder or circular saw to bevel the edges.

Review of the M-Horn in Hobby HiFi 2/2007

"The M-Horn really got cracking in our listening room. This speaker enjoys what it's doing. 'The 0-Zone Percussion Group', to be found on the Manger Listening test CD, had a spectacular appearance. That's exactly the right speaker for this type of music. It was quite amazing to experience the tight the powerful drum beats that were thrown into the listening room. Or 'The Cost Of Freedom' by Marla Glen: the rich bass of this recording filled the 30 square metre room with ease, and the vocals were remarkably detached from the loudspeakers."

Our kit contains

- HGH 258 FN II tweeter
- WPT 138 bass driver
- spring terminals
- 1/2 bag damping material
- self-adhesive sealing tape
- the crossover components
  to be mounted on wood (on the right)
- 8 Pan screws 4x20 mm, black
- 3 m cable 2x 1.5 mm2
- description and building instruction		 the Strassacker crossover:
- L1 n/a
- 1.0 mH ferrite coil
- 0.56 mH air core coil, 0.7 mm
- C1 n/a
- 18 uF audio frequency ELCO, consisting of
  6.8 + 6.8 + 4.7 uF in parallel
- 5.6 uF MKP
- R1 n/a
- 4.7 Ohm, MOX10
- 10 Ohm, MOX4		 the standard crossover:
- 5.6 mH ferrite coil
- 1.0 mH ferrite coil
- 0.56 mH air core coil, 0.7 mm
- 100 uF ELCO etched
- 18 uF audio frequency ELCO, consisting of
  6.8 + 6.8 + 4.7 uF in parallel
- 5.6 uF ELCO non-etched
- 18 Ohm, 10 Watt
- 4.7 Ohm, 10 Watt
- 10 Ohm, 5 Watt		 the high-end crossover:
- 5.6 mH ferrite coil (DR)
- 1.0 mH ferrite coil
- 0.56 mH air core coil, 0.7 mm
- 100 uF ELCO non-etched
- 18 uF MKT, consisting of
  10 + 8.2 uF in parallel
- 5.6 uF MKP
- 18 Ohm, MOX10
- 4.7 Ohm, MOX10
- 10 Ohm, MOX4

Note: Only with black tweeter available.

M-Horn, with Strassacker crossover (without wave trap C1-L1-R1)
Price per speaker (without cabinet)   EUR 55,00

M-Horn, with standard crossover
Price per speaker (without cabinet)   EUR 65,00

M-Horn, with high-end crossover (and high quality terminal)
Price per speaker (without cabinet)   EUR 82,00

If you prefer to mount the crossover components on a universal PCB instead on wood (1 PCB per standard speaker, 2 for high-end version are needed):
PCB 150x115 mm, tinned, price per unit: EUR 4,70

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