SONICS AS-181

Commentary

A speaker system developed for small Hi-Fi speakers.

A 17.5 cm cone type woofer is installed in the low range.
High compliance design is applied in order to obtain acoustic suspension completely, compliance is taken large, and roll edge obtained by special molding of rough cloth on the edge is adopted in order to absorb rolling distortion and amplitude distortion of voice coil.
The cone paper uses a non-pressed cone made mainly from pulp, which has excellent physical properties. It has an appropriate internal loss and toughness. In addition, the voice coil uses aluminum to improve the input resistance.

A 2.63 cm soft dome type tweeter is installed in the high range.
The diaphragm uses a specially dumped soft dome with a constant impregnation rate.

An LC-type network is used in the network section, the best crossover point selected by hearing is taken, and the distortion due to the network is removed by using ferrite core.

An independent continuously variable level control has been adopted for the middle and high areas on the side.

All 6 sides of the enclosure are made of homogen, and the built-in type is adopted for reinforcement.
The exterior is designed to make use of the wood grain.

Model Rating

Type	2-Way, 2-Speaker, Airtight Type, Bookshelf Type
Units Used	For low band : 17.5 cm cone type For high-pass : 2.63 cm dome type
Frequency characteristic	45 Hz to 20 kHz
Max Input	30W
Impedance	8 Ω
Output sound pressure level	86dB/W (New JIS)
Crossover frequency	2.5kHz
External dimensions	Width 236x Height 340x Depth 210 mm
Weight	7.0kg