It is a very simple design of the tiny speaker. Ideal for people who begin their adventure with a stand-alone building loudspeakers. The minimum number of parts and ease of construction make anyone can take on this project. High efficiency speaker allows the use of low power amplifiers (max. 25 W) to publicize room of 10 - 15 m2.

The Antlia is recommended for small sound systems, e.g. as computer speakers or a home theater system, or as a satellite or even center speaker while supplemented with subwoofer. In such cases its filter should be set to approx. 100 Hz. Mentioned applications are honestly recommended to them, as the used speaker has a shielded magnetic system. Therefore, it can work close to any electronic devices, without affecting them with their electromagnetic field. The impedance is also "friendly" for each amplifier.

There is no crossover utilized thanks to using a full range speaker. It is considered an advantage, by many audiophiles that consider it as having a negative influence on the sound quality.

 

Specifications

Type: 1-way, sealed
Frequency response (+/- 6dB): 100 – 20 000 Hz
Impedance: 8 Ohms
Sensitivity: 87 dB
Recommended amplifier power: 5 – 25 W
Dimensions (H x W x D): 200 mm x 150 mm x 165 mm
Weight: 1,9 kg/pc

Cost (without box): ~ 35 USD/pc

 

Construction

This project includes the box, the speaker, a piece of dumping material, 2-conductor speaker cable and connectors or terminal. For the box construction a kind of chipboard or MDF material can be used with a thickness of 12 mm. The dimensions of the elements are shown in the figure below and in the table later in this article. The loudspeaker box net volume is 3.1 liters.

 

The speaker model is W3-871SC from TangBand. It is a full range loudspeaker driver with a paper cone, aluminum phase plug used in higher class speakers and shielded magnetic system.

 

Any speaker cable size of 0.75 mm2 or larger can be used. Terminal or connectors of any kind are allowed.
Interior should be filled with dumping material in or other to suppress the standing waves. It can be glued to the inner side of construction walls or inserted in rolled form behind the speaker (it's better to fix it permanently, with a few drops of glue).

 

Crossover

As the speaker runs in full bandwidth, a crossover solution is unnecessary here. Speaker cable from the terminal have to be directly connected to the speaker with correct orientation ( "+" speaker red socket connector, and the "-" black). In this case, a diagram of electrical system is not required.

 

Box

MDF or chipboard with a thickness of 12 mm:
- front and back - 176 x 126 mm - 2 pcs
- top and bottom - 165 x 126 mm - 2 pcs
- side plates - 165 x 200 mm - 2 pcs

 

Modifications

For better sound at bass range, you can use a thicker plate, e.g. 16 mm and a better quality of the speaker cables and the terminal connector's.

 

List of elements for a single loudspeaker

Box - 1 pc
Speaker - W3-871SC - 1 pc
Speaker cable - 0.5 m, size 0.75 mm2
Dumping material - approx. 25 grams
Terminal (as requested) - 1 pc
Speaker screw - 4 pcs


Documentation to download (PDF file):