IMF STUDIO ALS 30 STEREO LOUDSPEAKERS

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IMF STUDIO ALS 30 STEREO SPEAKERS - VINTAGE QUALITY ENGLISH LOUDSPEAKERS

These speakers were purchased new in 1982, they have been used lightly since then and used very rarely lately.  They are genuine one owner items that have been well cared for.  They have had no repairs, no upgrades, no cone re-foaming, no driver replacement, no crossover adjustments. They come with the original boxes, packaging and manual.  Technical information from IMF is below. 

They are hand made English speakers of exceptional quality, well engineered and built to very high standards.  They are a mirror image pair, with four drivers in each enclosure. The enclosures are heavy, solid and inert. They are well constructed and veneered with real timber, a dark honey coloured oak.  There are some small scuffs, minor chips and scratches but considering their age they are in very good condition. The cloth is intact, some minor staining on one.  

They are working well considering their age.  I have no idea whether they are working to specification but they play music well, better than the other speakers I own. They have a solid, controlled sound, strong in the midrange.  They handle vocals and acoustic music very well.  If your music tastes include a lot of chunky assertive bass then these speakers may not be for you, or you may need to use a subwoofer or auxiliary bass speaker. They are not particularly efficient and do need some power to drive them.  I am using an amplifier that produced a continuous 60 watts per channel. This seems adequate, they can safely be driven by more powerful amplifiers.  

The midrange driver foam is starting to degenerate and probably should be renewed at some time in the future. I am not aware of any other mechanical issues, I have never opened them up and can’t comment on the condition of the crossover components.

The following technical information is sourced from the IMF website. 

STUDIO ALS 30

Dimensions
22 1/2" x 13" x 11 1/2" wide; 57 cm x 28 cm x 30 cm

Drive Units
6 1/2" 16.5 cm ribbed bextrene bass unit
6 1/2" 16.5 cm bextrene sub-bass unit
4" 10cm rolled surround impregnated cone mid-range with domed tweeter

Crossover
Electrical four way at 250 Hz, 450 Hz and 3.5 kHz

Frequency Range
29 Hz 20 kHz

Matching Impedence
4 - 8 ohms

Efficiency Measured via Pink Noise at 1 metre on axis for 40 watts
99dB

Driving Power Requirements
25 - 50 watts

Nett Weight (each)
16 kgs

Gross Weight Packed (pair)
38 kgs

IMF International, Westbourne Street, High Wycombe, Bucks. Telephone High Wycombe 35576

Sourced from: http://www.imf-electronics.com/Home/imf/speaker-range/studios/als30

These have been sold.