Amplifier for use with DLS-1 column speakers?

[stereomaster]

Hi everyone, I am new here and I am very interested in this subject, I just bought a pair of DLS-1, unfortunately without amplifiers. The sound is superb, but I wonder how these speakers sounds with an STD373?

Now my best match is using an old germanium amplifier Korting Neckerman, this is the best sound I have obtained, from 10-12 amplifier, the smallest, ugliest and cheapest of all sound better by far. I used Dual CV40, Optonica 3636, HK 650, HiFi Studio 6000 and many more, even a Bang&Olufsen 2000 de Luxe, Rote , but no better results than Korting.

Now I am looking for a valve amplifier, it is impossible to find an STD373 but I have a schematic, maybe this will help me to look for something closer to this.

If you have the diagram, please send it to me, I am pretty sure that is a classic PP with EL34, but is better to be sure.

If some of you tried with good results other amplifier, please share your experiments, I really don't know which way to go. SE or PP?

[RojDW48]

Interesting discussion here - https://www.vintage-radio.net/forum/...d.php?t=141013

[Diabolical Artificer]

Welcome to the forum. Nice finds, did you buy them in Romania? If so how did they get there? Maybe from a school or institution perhaps?

Finding the original amplifiers is going to be tricky unless you have deep pockets, finding original or similar OPT's to build an amp around even harder. However if they did come from a state institution, might be worth asking around schools etc, see what they tucked away in old storerooms. Wasn't isn't there a big music school in Bucharest?

What are the drivers in the speakers, single full range or two/three way?

Andy.

[stereomaster]

Nice to see there are still people who apreciate this old but good stuff, today the only word I can hear about the new speakers is "resolution" and "power", nobody seems to want to hear some nice music.

I bought them just judging just the outside, without knowing anything about them, the only label on the right corner is writen more like "D.L.S.I" than "DLS-1", no "EMI" or other word to give me some idea what brand is it, So I found nothing on internet looking for DLSI, I just took my chance, Just seeing the finish I was thinking that may be a quality product...

They were abandoned in a warehouse of the (only) former state record factory, staying untouched and full of dust for at least 20 years. Already done searching every inch of warehouse, ask everybody, looking everywere, no trace. Probably amplifiers gone long time ago, seems that the old guys who worked with them (and know what it is about) are retired or even dead, and the new guys consider tube amps just garbage.

I also bought some small EMI/Capitol speakers and a pair of Tannoy Monitor Gold 15" and others.

I will put up some pictures, the speaker is an EMI oval 13/8 and two identical tweeters in parallel.

[Herald1360]

If you find a new guy with a "garbage" amp to dispose of, you could be on to something...

For DIY, if the speaker drive units are the twin tweeter EMI 13x8 jobs, something like the Mullard 5-10 amplifier would be ideal. Apart from the transformers which you will have to pay the going rate for to get good ones, everything else is readily available and not astronomically expensive.

http://www.r-type.org/articles/art-003e.htm

[stereomaster]

Some pictures from the storage room where i found them, few details of speakers and on final position with some good company

[stereomaster]

Some more details..