Inside Out as in Klang+Ton 2/06

Inside Out aus Hobby HiFi 6/2004
technical data
- size (HxWxD): 40 x 19 x 30 cm
- impedance: 4 Ohm
- sensitivity (2.83V/1m): 82 dB
- frequency range (-8dB): 40 - 22000 Hz
- speaker type: band pass with hidden bass driver

Udo Wohlgemuth designed a loudspeaker called Inside Out, with hidden Monacor SPH 135 TC band pass.

Sound review by Klang+Ton 2/2006:
..."Since Yello's "Baby" was still in our CD player, we decided to play "Blender", not necessarily food for thought, but a fare that might be swallowed the wrong way by some show-off speakers. After burbling along for a while, especially with uncritical mids and tops, the first two bass kicks hit our stomach. We thought we had fallen for an acoustic illusion. One of our colleagues who happened to enter the listening room, asked us whether we have listened to these small speakers without the subwoofer. Well, his search for bass support was to no avail. "Sultans of Swing" by Dire Straits was reproduced by these manikins as if the music was coming from monsters. Electric bass, vocals, guitar runs and cymbal crashes came up without any critical sounds, neither from the speakers nor from the listeners. It wasn't any different when Mick Fleetwood battered his bass drum on "I'm So Afraid. Afterwards, we were spoiled by Lindsey Buckingham's acoustic guitar and Stevie Nick's delightful and captivating voice on "Landslide". But, even Shakira, Melanie C, Scooter and Fettes Brot were given the right treatment." ...

Our kit consists of:

- Number One DT 107 tweeter
- Number One SPH-130 midrange / bass driver
- bass driver with twin voice coil
  Number One SPH-135 TC
- bass reflex tube BR 50 (original length)
- terminal T105 with gold plated brass binding posts
- 2 packs (4 mats) polyester fleece
- 2.5 metre cable 2x1.5 mm2
- 16 x screws Pan 3.5x17
- the building instruction
- crossover components, to be mounted on wood:
- 4.7 mH ferrite core coil
- 1.8 mH ferrite T-core coil
- 0.39 mH / 0.7 mm wire
- 220 μF ELCO etched
- 8.2 μF ELCO non-etched
- 4.7 μF MKP capacitor
- 2.7 Ohm MOX4 resistor (red-purple-gold)
- 8.2 Ohm MOX4 resistor (grey-red-gold)
Note: The new port BR50 has only 48 mm cut-out diameter!

Price for Inside Out kit without cabinet per unit: EUR 260,00 excl. VAT: € 218.49 / $ 233.78

Upon request: impedance correction for valve amps
- 0.27 mH air core coil, 1 mm
- 33 μF ELCO non-etched
- resistor 6.8 Ohm, 5 Watt

Our high-end version of Inside Out

The high-end crossover contains:
- a low resistance i-core coil instead of ferrite coil
- an air core coil with 1.4 mm wire instead of 1.8 mH ferrite core coil
- a baked varnish air core coil, 0.9 mm wire instead of 0.39 mH air core coil
- instead of 220 μF ELCO non-etched, 3 capacitors in parallel:
  2 x 100 μF ELCO non-etched and 22 μF MKP capacitor
- a Mundorf MKP/400 V (in series to tweeter) instead of 4.7 μF MKP.

Price for high-end kit Inside Out without cabinet per unit: EUR 378,00 excl. VAT: € 317.65 / $ 339.88

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