NoBox BB

Our Price: AU $575.00 inc. GST each
AU $522.73 export price each

Product Code: V-5989

This item is listed in the following categories:
Visaton Kits, Floorstanding, 2 Way Speakers, Fullrange

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Art. No. 5989

Characteristics - Sound Properties

The NoBox BB unites a number of preferences in a single concept: it achieves the directness of a full-range loudspeaker, in particular in the voice range, and also manages to produce powerful, stable bass without having to fill the room with hardware.

The B 200 6 Ohm is used in the NoBox BB together with a 38 cm BGS 40 8 Ohm woofer in an open baffle as a dipole. The electric separation between the two drivers is low enough (250 Hz), which enables the full-range speaker to make full use of its capabilities and the BGS 40 8 Ohm is effectively the supporting woofer. The BGS 40 8 Ohm is a musician's driver with high sensitivity and can, as a result, easily be adapted to the B 200 6 Ohm without giving anything away in terms of mean sound pressure.

Despite the baffle being open, which theoretically causes an acoustic short circuit in the bass range, the system produces a dynamic low bass output down to 32 Hz (-10 dB). One reason for this is that the baffle is cut off from the floor and so no acoustic short circuit can take place in this direction. In addition, the side panels of the cabinet, which are mainly for stability, increase the acoustic distance travelled.

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Extract from Klang & Ton 03/2004

"What a surprise! These NoBox speakers are devilishly good. The treat we were offered in our editorial offices left even the most hardened professional testers open-jawed. Although the test results promised us a treat, none of us had really expected to hear such deep, clearly defined and crisp bass. Not once did we feel there was anything missing in the bass department."

"But it is not just the bass that makes this construction stand out - it is more the phenomenal B 200 wide-range speaker which, freed from the restraints of a cabinet, excels beyond compare."

The impression the sound makes is one of freedom and independence with a bass quality which is so good that the lack of sub-double bass is not perceived as a detraction. What really made us sit up and take notice is the unique combination of spatial separation and the phenomenal clarity of the sound picture. The overall impression these NoBox speakers make is less an overbearing, special-effects one than one of unbelievable coolness. The music is simply there, unpretentious and unobtrusive with sufficient objectivity and yet straight to the heart. Brilliant, this has given us a completely new set of impressions from the field of music."

Extract from Stereoplay

Visaton, the only remaining large-scale manufacturer in the German DIY market, has brought together two audiophile concepts here: The NoBox is a combination of the 20 cm full-range driver and 40 cm dipole bass speaker.

In the listening test, the NoBox came out tops in its clear reproduction of the upper frequencies and treated us to far more detail than a speaker without a tweeter should do. The voices were in 3d - in the room with us - and the voice reproduction was absolutely first-rate. The lower-range sound was equally astounding: while we were expecting relatively thin but precise bass ripples we were met by powerful, deep, crisp waves of bass.

Technical Data:
Rated power	200 W
Maximum power	300 W
Nominal impedance	4 Ohm
Frequency response (-10 dB)	32 - 20000 Hz
Mean sound pressure level	90 dB (2,83V/1m)
Cut-off frequency	250 Hz
Principle of Housing	Open Dipole
Outer dimension height	1215 mm
Outer dimension width	538 mm
Outer dimension depth	355 mm

frequency response

Construction

The panels are cut to size and glued together as shown in the drawing. The crossover can be attached to the rear of the baffle between the loudspeakers, for example, or on the base. The terminal connections are fitted to the vertical panel attached to the base.

Proposal 2 is more complicated. The edges are embellished with solid wood strips. In addition, a grille frame is included so that the entire front can be covered with fabric (please order separately). The frame is simply forced between the side pieces. The woofer should be recessed by 10 mm so that it does not touch the fabric.

If critical tube amplifiers are used, the impedance curve should be made more linear (see circuit diagram). The components are mounted on a separate PCB as shown in the circuit diagram and connected upstream of the input to the NoBox BB crossover.

Component parts list for 1 box

The kit includes all the components listed here but not the cabinet.

Fullrange speaker	B 200 6 Ohm	1 piece
Woofer	BGS 40 8 Ohm	1 piece
Terminal	ST 77	1 piece
Crossover	Crossover NoBox BB
Wood screws	5 x 30 mm	8 pieces
Wood screws	4 x 25 mm	6 pieces
Cable	2 x 2.5 mm²	1.5 m
		................

Cabinet parts list for 1 box

Parts	Size (mm)	Quantity

Version 1:
Material: 19 mm chipboard or MDF
Front panel	1210 x 500	1
Bottom panel	325 x 500	1
Side panels	1216 x 355	2
Panel for terminal	150 x 150	1

Version 2:
Material: 19 mm chipboard or MDF
Front panel	1210 x 512	1
Bottom panel	315 x 500	1
Side panels	1186 x 295	2
Panel for terminal	150 x 150	1

Material: Wood strips
Edges	1220 x 30 x 30	4
Upper edges	143 x 30 x 30	2

Material: 10 mm MDF
Frame	1210 x 498	1

version 1

version 2

crossover

impedance linearisation (optional)

sketch (version 1)

sketch (version 2)

frame (version 2)

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