Rogers LS3/5a question


I am a pro audio guy and know very little about hi-fi stuff. I was at an estate sale today and found a pair of Rogers Ls3's for a VERY good price. They were built in 1079 and the construction is some of the best I have ever seen in a speaker. The problem is that they are 15 ohms and I really don't have anything to power them. I do not want to damage them by hooking them up to something I shouldn't. I would love to hear them and make sure everything works properly. From what I gather from a little research is that the mid-range is incredible. If they are better than my reference monitors I will keep them, if not they will be sold. Thanks for your help guys!
stellastudios
(Those more knowledgeable, please correct me if my memory is faulty on this.) If you're looking for "ruthlessly revealing" monitors for recording/mastering, the LS 3/5a may not be ideal. While intended for use as monitors, they were designed by the BBC (IIRC) for mobile-recording situations, i.e., mobile vans, etc. They were also (again IIRC) designed for monitoring the human voice. They are famous for a mid-bass bump to give the illusion of deeper bass. Thus, they are not the flattest of monitors. None of this prevented them from being enormously popular and beloved in the audiophile community. Sorry I can't give you any advice on amplification.
-Bob
I had two pairs of Rogers at various times. They are subjectively very flat and terrific for solo voice, guitar, violin, small emsembles, but due to sensitivity issue will not play extremely loud and are comparatively speaking undynamic. So for large scale orchestras and rock they are not the best choice. Recommend tube amp 20-50 watts for best results.
I think any quality amplifier will drive the 15ohm Rogers with no risk to the speaker. Just use common sense and no wide open volume pots! I have a pair for over twenty-five years and have driven them with a Dynaco Stereo 70, Bedini 25/25, Quattre DGC-250 (solid state), Bryston 4B (solid state), NAD 3020 (solid state) and McCormack DNA-125 (also solid state). I have never experienced a problem with any of the set ups. The tubes were wonderful with them - seemed to ease the mid-bass bump a bit. Of the solid states, the McCormack was the hands down winner - almost fooled you into thinking it was tube. Hope this helps. Enjoy the little guys.
I had a pair also back in 1980, the Swisstone models with the 15 ohm inputs.

A NAD 3020 and a Dynaco Stereo 70 made them sound quite nice.

But I was a musician at the time,and they just didn't have enough bass for me, and no sub at that time ever really matched up.

They imaged quite well, by that you got good spacing and layering of the players on the recording, but it was all miniature.

I sold them and went to Acoustat 3 medallian and this was closer to what my musician wants were at the time.

The deal closer for me was when I took the LS3/5A out of a small room into a large room. They just didn't do it anymore.
If you want to use them as monitors, keep them in a small space and you maybe quite pleased.
Those are ok speakers but...
If you want to just get rid of them let me know.
*s*

PS. Hook em up to just about anything of decent quality and you'll be able to see if they are ok. If you are running "reference" monitors, then you certainly must have something good driving them. Just take those out and slip the Rogers into their place and you'll see right away if you like them.