Couplet

Art. No. 5912

Characteristics - Sound Properties

The COUPLET is a D'Appolito configuration shelf speaker. in the low to mid-range two 13 cm drivers, model AL 130 8 Ohm, take over the work. These high-end speakers can really show what they're capable of in a 25 litre bass reflex cabinet. Their long stroke and low mechanical losses guarantee powerful, rich bass reproduction. This is due to a large extent to the BR 25.50 bass reflex tube, mounted on the back of the cabinet, with its flow-optimised shape.

In the high-frequency range above 4000 Hz, the 20 mm textile domed G 20 SC 8 Ohm demonstrates its very linear frequency response and excellent omnidirectional sound distribution.

The specially designed crossover circuitry optimises the interaction between the mid-bass unit and the tweeter and effectively suppresses unwanted resonance from the aluminium diaphragms before it becomes noticeable. The frequency response in the mid-range is made more linear.

The result is a speaker that maintains its linear characteristics right across the frequency range. Due to the well balanced medium range, the fine details of music reproduction, in particular, comes across particularly clearly. The excellent omnidirectional sound distribution creates a particularly room-filling music reproduction and clear location of each individual instrument or voice. The lowest-range bass comes across equally powerfully. In short, the COUPLET is a speaker that is really good fun.

COUPLET is part of the combinations:
System COUPLET A

Frequency response

Construction

All the cabinet panels are cut from 19 mm chipboard or medium density fibreboard, butt-jointed and glued. The chamfers on the baffle can be applied with a power jig or circular saw set to 45° or applied later using an orbital sander.

Next, cut out the openings for the drivers, the bass reflex tube and the terminals.

Due to the small size of the cut-outs in the baffle, it is difficult to mount the crossover inside the speaker cabinet. It would be possible to make the base removable. However, it is easier to wrap the crossover in damping material and place it through the lower cut-out in the baffle on the floor of the cabinet. When you begin fitting the drivers, start with the bass reflex tube. In order to be able to get the inner trumpet flange through the opening for the upper subwoofer it will be necessary to carefully remove about 5 mm from both sides of the flange.

Inner damping

The damping material is loosely arranged below the bass reflex tube in the cabinet in such a way that the area around the vent remains free.

Crossover

Sketch