Audio Database

2S-305D image
Commentary

A speaker system with a redesigned 2S 305 for home use.
It was released at the same time as the second DIATONE DS series speaker.

2S-305D uses the same cabinet and unit as 2S-305.
The main changes include a walnut finish on the exterior, a removable front back RUNNET, and a network-based tone adjustment mechanism that changes input terminals and smoothly changes high-frequency slopes.

A 30 cm cone type woofer is installed in the low range.
The vibration system of the PW 125 is a mechanical filter that attenuates the high-frequency range at a crossover frequency of 1500 Hz or more, so there is no unnecessary high-frequency radiation even without using a network.

A 5 cm cone type tweeter is installed in the high range.
The diaphragm of this unit has an effective vibration radius of 2 cm, and the magnetic circuit is made of iron-cobalt alloy, which is considered to have a higher saturation magnetic flux than other magnetic materials, to achieve higher efficiency.

The enclosure uses a bass reflex method. In addition, thin plates of hippopotamus and lauan are bonded one by one to make the exterior angle round, preventing the influence of the diffracted phenomenon on the middle and high frequency range and increasing the mechanical strength.

Model Rating
Method 2-Way, 2-Speaker, Bass Reflex System, Floor Type
Configuration such as unit For low band : 30 cm cone type
For high-pass : 5 cm cone type
Playback frequency band 50 Hz to 15 kHz ± 5 dB
Input impedance 8 Ω
Crossover frequency 1.5kHz
Rated input 20W
Max Input 60W
Output sound pressure level 96dB/W (New JIS)
102dB/VA
Network High Frequency : 12dB/oct
Level control High frequency : 3 positions (10 kHz to 15 kHz)
External dimensions Width 650x Height 880x Depth 445 mm
Weight 42 kg (listed in the catalog after 1975)
50 kg (listed in the catalog from 1969 to 71)