These relatively small bookshelves are quite easy on the eyes, thanks to the good proportions of the driver size to the enclosure dimensions. The cabinets are made of 19mm chipboard and veneered on both sides in case of sides, tops and bottoms. Front and back panels are not veneered, and instead, are painted black on the outside surfaces. There is internal chipboard bracing attached to the side walls. To further reduce vibrations, dynamat-like damping panels are attached to internal walls (visible on the photos). Enclosures are loosely packed with two polyester sheets, however, these are not visible on the photos as they were removed to allow internal cabinet photographs.
The Celestion SL6 crossovers are setup on printed circuit boards (PCB) and feature a mix of polypropylene and electrolytic capacitors, as well as a mix of an air-core and ferrite-core inductors. All connections are soldered, with an exception of where the crossovers connect to the speaker terminals and directly screw down onto the input terminals with eyelets on the PCB. All crossover components are set on foam pads to reduce the vibration – nice attention to details from Celestion.
Same attention was given to Celestion SL6 drivers, which are indeed very well made. Apart from enhancements briefly covered in the previous paragraph, it is worth to mention that the woofers feature a really rigid die cast alloy baskets with a lot of ‘breathing’ space and fairly substantial ferrite magnets. Tweeters feature an integrated grille which I presume not only protects the frigate aluminium dome, but also acts as a acoustic lens. The diaphragm with its grille is attached directly to the tweeter face plate. Both the woofer (T3507) and the tweeter (T3506), have seals on the back, which aids with creating air-tight cabinets. All in all, Celestion SL6 are pretty well made loudspeakers.
