Identify these vintage 8" Alnico drivers.

[walpurgis]

Two vintage 8" Alnico magnet bass/mid drivers from a pair of speakers I built over forty years ago and I can't remember what they are. If you know, tell me. My initial thoughts are maybe Isophon, they have that German look about them and look to be high quality.

https://i.ibb.co/X3zTB0C/IMG-1090.jpg (https://ibb.co/dLQy9C5)
upload images (https://imgbb.com/)

[Lawrence001]

I recognise the baskets but not in white. I'll have a dig.

[struth]

saw a pair like them. were marked as "russian" but no maker mentioned. expensive too.

[walpurgis]

I recognise the baskets but not in white. I'll have a dig.

They're not white, the alloy is matt finished like a sand casting.

[struth]

found pair i was looking at geoff.

https://www.ebay.co.uk/itm/233671210402?_trkparms=amclksrc%3DITM%26aid%3D1110 01%26algo%3DREC.SEED%26ao%3D1%26asc%3D201609081050 57%26meid%3D8c5467e5ceff4deaa53a26a85cc9051a%26pid %3D100675%26rk%3D1%26rkt%3D15%26sd%3D233671210402% 26itm%3D233671210402%26pmt%3D0%26noa%3D1%26pg%3D23 80057&_trksid=p2380057.c100675.m4236&_trkparms=pageci%3A074b595c-42f2-11ec-95de-6ab1945154ad%7Cparentrq%3A0f276aef17d0a44c3a44e537 fff2bf9e%7Ciid%3A1

[walpurgis]

saw a pair like them. were marked as "russian" but no maker mentioned. expensive too.

Yeah, could be Russian. They've made some good speakers. Actually, I seem to recall these may have been used in Decca's own speakers, they used a variety of makes including their own..

[walpurgis]

found pair i was looking at geoff.

https://www.ebay.co.uk/itm/233671210402?_trkparms=amclksrc%3DITM%26aid%3D1110 01%26algo%3DREC.SEED%26ao%3D1%26asc%3D201609081050 57%26meid%3D8c5467e5ceff4deaa53a26a85cc9051a%26pid %3D100675%26rk%3D1%26rkt%3D15%26sd%3D233671210402% 26itm%3D233671210402%26pmt%3D0%26noa%3D1%26pg%3D23 80057&_trksid=p2380057.c100675.m4236&_trkparms=pageci%3A074b595c-42f2-11ec-95de-6ab1945154ad%7Cparentrq%3A0f276aef17d0a44c3a44e537 fff2bf9e%7Ciid%3A1

That's the answer it seems. Now what to do with them? :)

[Shovel_Knight]

found pair i was looking at geoff.

https://www.ebay.co.uk/itm/233671210402?_trkparms=amclksrc%3DITM%26aid%3D1110 01%26algo%3DREC.SEED%26ao%3D1%26asc%3D201609081050 57%26meid%3D8c5467e5ceff4deaa53a26a85cc9051a%26pid %3D100675%26rk%3D1%26rkt%3D15%26sd%3D233671210402% 26itm%3D233671210402%26pmt%3D0%26noa%3D1%26pg%3D23 80057&_trksid=p2380057.c100675.m4236&_trkparms=pageci%3A074b595c-42f2-11ec-95de-6ab1945154ad%7Cparentrq%3A0f276aef17d0a44c3a44e537 fff2bf9e%7Ciid%3A1

Yep, definitely Soviet-made as they have Soviet OTK ("quality control") stamps.

[Shovel_Knight]

10GD-30A, made by inmates of a penal colony near Novosibirsk in Russia.

http://ldsound.ru/10-gd-30a/

8Ohm impedance, 86dB sensitivity, max power 10W RMS or 20W musical programme, Fs 25 Hz, Qts 1.0, Vas 60l

[walpurgis]

Ah, thanks.

[Lawrence001]

10GD-30A, made by inmates of a penal colony near Novosibirsk in Russia.

http://ldsound.ru/10-gd-30a/

8Ohm impedance, 86dB sensitivity, max power 10W RMS or 20W musical programme, Fs 25 Hz, Qts 1.0, Vas 60lI hope they didn't put sand in the voice coils like the slave labourers did to German engines in WW2.

Mind you JPW were just as bad using convicts to make their cabinets [emoji23]

[Shovel_Knight]

I hope they didn't put sand in the voice coils like the slave labourers did to German engines in WW2.

Mind you JPW were just as bad using convicts to make their cabinets [emoji23]

When I still lived in Russia, one of my mates had speakers made by this factory. One day he decided to "upgrade" them (replace wiring, upgrade crossovers, that kind of thing) and asked me to help him. When we opened them up, there was half a brick in one of the speakers and a letter from a prisoner wrapped around it ("whoever finds this, please let my mother know that I'm OK"). It was ~15 years after the speakers were made, so the guy had probably already served his sentence by then.

[Lawrence001]

Great story!