Hot Sprot a speaker system with transmission line bass and 2 way top as in Klang+Ton 6/2007

Harald Meyer designed a speaker system for Tang Band and Omnes Audio drivers that was published in Klang+Ton 6/2007. The major component is the Omnes Audio MW 8.01 bass driver used in a transmission line cabinet; the bass unit can be combined with several high / mid frequency units (called Top).

The following Tops can be place on top of the bass unit:
- with Tang Band full range driver (see below) or
- with Tang Band coax driver or
- with 2 way cabinet with Tang Band tweeter and Omnes Audio bass drivers

 

Please note: These speakers are enormous, before attempting to build this speaker a model should be made.Hot Sprot Full Range as in Klang+Ton 6/2007

Hot Sprot with Tang Band W3-871 SA full range driver

Technical data of the Hot Sprot full range
- size (HxWxD): 113 x 28.8 x 43.6 cm
- impedance: 6 Ohm
- sensitivity (2.83V/1m): 83 dB
- crossover frequency: 330 Hz
- frequency range (-8dB): 32-22 000 Hz
- speaker type: transmission line

Excerpt of the review in Klang+Ton 6/2007:
... "The full range version, obviously needs to be angled towards the listener, while both other variations are fine when placed in parallel to the side walls. Initially, we paid attention to the bass that was ultra low and sonorous. Like any good transmission line, the Hot Sprot bass displays an unspectacular but always present low frequency range. In conjunction with the two way Top this system succeeds in producing an extremely relaxed and pleasant sound, perhaps without attention to the finest details, but certainly with an impressive homogeneity and a wide range of timbres and dynamics. The combination with the coax driver shows slightly more three-dimensionality, more differentiation of instruments and more depth, but at the expense of a slightly less balanced tonality and size of the sound reproduction. The full range driver version displays an even more pronounced three-dimensionality, width and depth of the stage were just phenomenal, also the reproduction was extremely thigh an direct – no surprise, since the full range driver was totally relieved of lower frequencies that were contributed by the bass unit with exceptional control."

The Klang+Ton recommendations:
"The full range version is ideally suited for the connoisseur who prefers lower volumes, the coax version will attract listeners who fancy a precise and detailed reproduction, while the two way version is for those of us who favour a bold and big sound.

Our Hot Sprot Full Range consists of:

  • 1x Tang Band W3-871SA full range driver
  • 1x Omnes Audio MW 8.01 bass driver
  • 3.5 packs (7 mats) polyester fleece
  • 0.5 mat nap foam
  • 1/2 pack wool
  • 10 PAN screws 4x20
  • 6 binding posts, gold plated
  • 3 m cable 2x1.5 mm2
  • sealing tape
  • the crossover components to be
    mounted on wood (see right)
  • Klang+Ton building instruction
  • 5.6 mH Mundorf HPGR56 core coil
  • 3.3 mH Mundorf HPGR40 core coil
  • 0.56 mH air core coil, 0.7 mm
  • 100 μF ELCO non-etched
  • 47 μF ELCO non-etched
  • 12 μF MKP capacitor (10+2.2 μF in parallel)
  • 2x 2.2 Ohm MOX10 resistor (red-red-gold)
  • 2.2 Ohm MOX10 resistor (red-red-gold)

Please note: compared to the Klang+Ton version our kit contains additional three mats polyester fleece and nap foam since this was recommended by the designer.

Price per Hot Sprot Full Range kit with cabinet per unit: - not available

If you don't want to mount the crossover components on wood, we recommend a 220 x 155 mm universal PCB.
Price per PCB (one needed per speaker) EUR 11,80 excl. VAT: € 9.92 / $ 10.71

Hot Sprot Full Range with high-end crossover

If you prefer this floorstander with high grade components, we recommend our high-end version consisting of a baked varnish coil and a 47 μF MKP capacitor in the signal path to the full range driver:
  • 5.6 mH Mundorf HPGR56 core coil
  • 3.3 mH Mundorf HPGR40 core coil
  • 0.56 mH baked varnish air core coil, 0.7 mm
  • 100 μF ELCO non-etched
  • 47 μF MKP capacitor
  • 12 μF MKP capacitor (10+2.2 μF in parallel)
  • 2x 2.2 Ohm MOX10 resistor (red-red-gold)
  • 2.2 Ohm MOX10 resistor (red-red-gold)
Price per Hot Sprot high-end, full range kit, without cabinet per unit: - not available

If you don't want to mount the crossover components on wood, we recommend a 220 x 155 mm universal PCB.
Price per PCB (one needed per speaker) EUR 11,80 excl. VAT: € 9.92 / $ 10.71

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