One of Visaton's best loudspeaker systems, emplying the excellent MHT 12 ribbon tweeter with two AL 130 midrange and one sidemounted TIW 250 XS 10 inch bass unit. Superbly well balanced and enormously powerful. (1 pair of speakers, assembly required)Art. No. 5983
Characteristics and sound properties
Due to the deep starting frequency of the MHT 12 8 OHM it is possible to make use of this magnetostat in the VOX 253. Of course, the crossover has to be changed from that used in the original version with its KE 25 SC 8 OHM. Fortunately, the AL 130 8 OHM 's only have to be separated slightly higher which means we are still a long way from the baffle resonance levels. Here, too, the transfer frequency is 3000 Hz. As can be seen from the dotted frequency curves for the individual drivers, the AL 130 8 OHM drop off at 2000 Hz and the MHT 12 8 OHM at 4500 Hz and meet again at 3000 Hz and -6 dB. The magnetostat need not by any means produce its full output at 3000 Hz, as some people often believe. This would not make sense in terms of achieving the lowest possible distortion factor.
Since the front panel of the MHT 12 8 OHM is slightly larger, the AL 130 8 OHM 's have to be spaced a little further apart (10 mm).
As regards their sound quality, both versions (original VOX 253 with KE 25 SC and VOX 253 MHT) are at the same high level. The version preferred by each particular customer will depend on personal taste, the type of music you listen to and how you listen.
Additional Technical Data: Cut-off frequency 200 / 3000 Hz
Principle of Housing Bassreflex
Net volume 70 l + 4 l
Outer dimension height 1150 mm
Outer dimension width 235 mm
Outer dimension depth 400 mm
In the lower part of the cabinet, you can see the tunnel, made up of the base and an upper board. In the middle, there are three cross-reinforcements. At the top of the cabinet, behind the cut-out in the baffle for the mid- to high-range unit, is the enclosure required for the mid-range cone, made up of two wooden boards. Three 8 mm holes has to be drilled into the rear board of the mid-range enclosure for the connection leads. These holes have to be sealed well.
Fitting the TIW 250 XS into the side is a special feature. The mounting board for the TIW 250 XS (346 x 297 with a 235 mm cut-out) itself is glued in place from inside behind the round cut-outs in the corresponding side panel. This means that the bass driver can be sunken by 19 mm (19 mm = thickness of the boards). For optical reasons the side panel cut-out must be made extremely accurately.
The crossover unit is mounted on the side panel behind the bass port.
The damping uses one mat placed in the medium range cabinet. The remainder is evenly distributed throughout the cabinet. The area above the tunnel opening (at the rear of the front panel) up to the lower edge of the reinforcement remains free. If, as a result of the acoustics in the room, the low-range bass is too powerful, damping this area will have a corresponding effect on the overall bass output level.
Component parts list for 1 box
Tweeter MHT 12 8 Ohm 1 piece
Midrange AL 130 8 Ohm 2 pieces
Woofer TIW 250 XS 8 Ohm 1 piece
Crossover "VOX 253 MHT"
Terminal BT 95/75 1 piece
Damping material 4 bags
Special wood screws 5 x 30 mm 6 pieces
Wood screws 3,5 x 19 mm 12 pieces
Countersunk screws 3,5 x 25 mm 4 pieces
Cable 2x 1,5 mm2 2 m 2x 2,5 mm2 2,5 m
Cabinet parts list for 1 box
Parts Size (mm) Quantity
Material: 19 mm MDF or chipboard
Side panels 1150 x 378 2
Bottom panel 197 x 378 1
Rear panel 197 x 1051 1
Top panel 197 x 359 1
Bass reflex channel 197 x 270 1
Brace 197 x 100 2
Brace 197 x 60 1
Midrange rear panel 197 x 500 1
Midrange bottom panel 197 x 43 1
Mounting board woofer 346 x 297 1
Material: 22 mm MDF or chipboard
Front panel 1150 x 235 1