EMI 630 Speakers

A rare sight to find these England made dual concentric speakers in the used market, these speakers or EMI speakers have been rumored to have been used in recording studios in England.

These speakers were designed around the use of tube amps and are very efficient. Smaller than the Isophon PH2132E speakers with a little more bass and the mid range set back just a bit.

Interesting to see the inductor coil wrapped around the capacitor in the crossover.

These speakers sound magnificent and image really well.

Plenty of further information can be found through the Ebay site on EMI and these speakers.

These speakers from my research seem to have a cult following in Asia, Japan and Honk Kong these speakers seem to command a premium compared to the North American market.

Noresco NEC-571 Speakers

I came across another pair of Noresco speakers, the NEC-571. Super heavy, solidly built with a real wood veneer.

Instead of using Isophone drivers, this unit uses Foster drivers. The woofer seems to be Alnico, the tweeter seems to be a full range 3" driver that acts like a mid range/tweeter, it has an open back on the casket but its own separate box inside the speaker.

These speakers sound pretty solid with deep bass from the 10" woofer. The speaker box is an acoustic suspended design.

Efficiency is pretty good as they sound pretty loud on the tube amp.

They remind me of the ADC 303AX speakers that were featured here a few months ago.

The cabinets sanded out the blemishes pretty nice and a coat of Circa 1850 Terra Nova oil brought back the luster of the Walnut. I pulled the old faded speaker cloth off to reveal the drivers, it needs to be replaced.

A much different offering than the Noresco NE-561 speakers featured here early. These have more bass but not nearly the sound stage as the NE-561's.



 

Noresco NE 561 Speakers

A great find came my way in this pair of Noresco NE 561 speakers, these are Canadian made with a well revered Isophon PH2132E dual concentric Alnico 8"X12" woofer with a 3" tweeter center mounted.

This pair of speakers has a beautiful walnut veneer cabinet that was a little sun bleached but a few nice coats of Circa 1856 Naturoil brought out the best in the cabinets.

I have swapped to this oil versus Minwax as the Minwax off gasses for 48 hours and this product is all natural.

I opted to upgrade the internal speaker wire to 16 gauge and replace the tired caps with Solen Fast Caps and it has completely opened up these speakers.

It looks t me like Noresco built these speakers to Isophon specs according to the data sheet.

So how do they sound, absolutely amazing on the Single Ended tube amp. They need a little bump up in the bass region but the mid range imaging is incredible. The cone tweeter is nice and smooth without any paper harshness, almost horn like. The dual concentric driver really shines in placement of instruments and musicians, the sound from one origin source is a real joy to listen to, no wonder the Isophon PH2132 drivers are well sought after.

The efficiency is pretty high of at least 95db at one watt, which suits the tube amp perfectly.

I have become a real fan of well designed speakers that use natural roll offs and a single capacitor in the crossover, it means that the drivers were designed to work together and they are not off the shelf  drivers.

Speakers that do this the best are EPI 100's, AR 18B's these Isophon drivers, the Tannoy Oxford Gold's and the Sound Dynamic Concert 500's all have a 1st order crossover and they all sound best on a tube amp.

These Noresco'c image incredibly well as if they are a window into the music. If you are a tube aficionado these speakers should be on your list of must hear speakers.