Twentyfive aus K+T 2/2007

3 Subwoofers for the line array Twentyfive   as in Klang+Ton 2/2008

A subwoofer for the 234 cm tall line array Twentyfive (pictured left) was needed. - Three editors of Klang+Ton came up with three totally different solutions:

Subwoofer Twelve (Big Brother) with Tang Band W5-876 SA

Technical data:
- impedance: 6 Ohm
- rated SPL: n/a since active
- frequency range (-8dB): from 30 Hz
- size without base (HxWxD): 226.8 x 20 x 30 cm
- cabinet type: bass reflex
Subwofer Twelve aus Klang+Ton 2/2008 Matching the Twentyfive Christian Gather designed a massive subwoofer comprising 12 x Tang Band W5-876 SA drivers.

The subwoofer is driven by Monacor SAM 2 amplifier that has to be fitted into a separate enclosure since the column is too slim.

Excerpt from the review of the three subwoofers in Klang+Ton 2/2008:

... "So many subwoofers next to the Twentyfive are taking away quite a bit of space in our listening room and also draw a considerable amount of current. But what matters now is to establish whether there is a "best" subwoofer for the Twentyfive and which of the three contestants it's going to be. Right away, I am extremely happy with my columns and I don't have to adjust too many settings; they just do their job with subliminal might and main. In view of the bass distribution in a room they don't interact that much with the feared resonance, which is not generated by the Twentyfive anyway. Therefore, they harmonised, unexpectedly, extremely well with the satellites. Once again proof that unusual designs might be relatively uncritical in reality. Thomas Schmidt's dipolar subs - I have to admit I like dipolar speakers, also for bass - showed their typical and expected dipolar behaviour that is so difficult to describe in words. The bass is just there, somewhere in the room. One hardly has the impression that bass is generated anywhere - the bass is simply an element of an integral whole. That's extremely pleasant, due to the inherent transparency, but is also unusual and lacks a characteristic that would work extremely well, especially with the Twentyfive: punch! When somebody kicks the bass drum then the dipole reproduces this quite realistically, but somehow something is lacking. As already mentioned, it's difficult to put into words. After listening to a dipole for a while, a boxed sub sounds rather clumsy and boomy, but that's all a matter of taste. Finally the Aurasound by Holger Barske. This sub looks rather lost next to our gigantic columns. But due to some experience I have little doubt about their ability. The Aurasound surely doesn't disappoint. Extremely precise and incredibly tight, but still exceptionally musical and realistic; that's how the octahedron distinguishes itself. The other contenders are too far away for a direct comparison and a final verdict on which of three is the best companion for the Twentyfive. There was hardly any doubt that the Aurasound would be primus inter pares, especially when the price tag is taken into consideration. But it was a huge surprise to me that at the end the battle of three diverse concepts, all with their own plus points resulted in a stalemate."

Our kit consists of

  • 56 PAN screws
  • 14 metres cable 2x 2.5 mm2
  • description / building instruction

the kit: order no. str-twentyfive-s12,
Price per speaker (without cabinet)   EUR 802,00

Please note: the 12 bass reflex tube should be 36 mm inner and 40 mm outer diameter with a length of 19 cm. The tubes and the wood are usually available at building supplies stores. Additionally, a 40 x 40 cm pavement tile is needed as base.

Note 2: Either one or two subwoofer can be used, Klang+Ton recommends two.

The other subwoofers:   Holger Barske: One,   Christian Gather: Twelve and Thomas Schmidt: Eight

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