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TECHNICAL DATA SONAB OA-4 TYPE 2

According to the SONAB manual and/or “HiFiHandboken”

Volume: 36 litres 
Measures: 24 x 49 x 43cm (W x H x D)
Weight: 9 Kg 
Principle: Omni-directional. Bass reflex. (Editors comment: Well. The models lack a real bass reflex tunnel. There are only two round holes in the bottom with glass wool inside, almost a like Dynaudio’s bass vented systems. Due to production technical reasons, was Sonab’s excuse, greediness we say. Stig Carlsson never used this solution in any of the following models.)
Impedance: Approx. 7 ohm
Frequency range: 44-18.000 Hz 
Frequency response: 48-15.000 Hz +/- 5 dB on the floor against a wall 
Cross over frequency: 3500 Hz (6/12dB)
Full range unit: 1 22 cm 8 ohms Philips 9710 full range unit.
Tweeter: 3 pc 5 cm, Peerless MT20HFC. One 16 and two 8 ohms.
Finishes: Rosewood, walnut, teak, oak and white lacquer. 
Prices (in SEK)
1973: 630:- per pair 
2nd hand: 100:- up to 1500:-
Fully restored in good condition: May cost up to 2.800:-
Fully upgraded: Up to 4.800:-.