ALTO II



 

Exploded drawing

Assembly

In order to simplify the cabinet construction as far as possible, we have done without the chamfers shown in the photo. If you prefer to include the all-round front chamfer, you will need the following information:

Angle: 30°
Width: 10 mm

The cabinet consists of boards stuck together (butt jointed), making construction a simple matter. First of all, the individual boards are cut to size (refer to cutting list), stuck together (butt jointed) as shown in the drawing and firmly clamped for the duration of the drying time using sash-cramps or parcel tape. Once the cabinet has been completely built, the cut-outs are made for the speakers, bass tube and terminals using a jig-saw. The last job is the surface treatment, i.e. painting, veneering or adhesive film.

Inner damping

The damping of the speaker uses four mats of damping material pushed into the cabinet through the bass cut-out. To this end, the mats are folded once long ways and once crossways and pushed into the cabinet in such a way that the space behind the tube remains free and the rest of the space inside the cabinet is loosely filled.

Component parts list for 1 box

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

Tweeter

DT 94 - 8 Ohm

1 pc.
Bass-midrange driver

W 170 S - 4 Ohm

1 pc.
Crossover

Crossover Alto I/II (with terminal, cables und plugs)

1 pc.
Bass reflex tube

BR 15.34 (full length)

1 pc.
Damping material

Polyester wool

2 bags
Wood screws

3.5 x 19 mm

3 pcs.
Countersunk screws

3.5 x 25 mm

9 pcs.

Cabinet parts list for 1 box

Parts Size (mm) Quantity
Material: 19 mm chipboard or MDF
Front and rear panel 762 x 192 2
Side panel 800 x 230 2
Top and bottom panel 230 x 192 2

Sketch

Crossover

Press

Extract from HiFi Test

"the elegant Alto II bass reflex column speaker fascinated us with its bass reproduction that would put many a speaker twice the size to shame."

Value for money: very good

Press

Extract from Klang & Ton

"Its bass reproduction is not only very rich and very powerful, but in addition highly precise, full of detail and free of colouration. Both the base and lower mid-range remained perfectly neutral."..
"Music reproduction is airy and far reaching."

Value for money: very good