Tag Archives: Ribbon microphone

The Viking(s). Extinct Audio’s BM9 Matched Stereo Pair…… Following on from my post in January.

The danger in buying an Extinct Audio BM9 ribbon microphone is that very soon you will want a stereo pair! When Stewart Tavener at Extinct offered to lend me a second one to ‘try’ he knew exactly what would happen! ( Yorkshire cunning!)  It didn’t take long before I hit the PayPal button. So I now have a beautiful matched pair!

Extinct Audio BM9 Matched Stereo Pair

The mics are coincidentally mounted, vertically one above the other and set at 90 degrees. (Classic Blumlein) I have used Rycote InVision 044901 Universal Shock Mounts as these make it really fast and easy to position the mics. They also provide the best possible isolation, and there is no chance of the mics falling out! The magnets in these microphones are seriously heavy and would make a considerable impression landing on the performer’s head!

The recording clip below of saxophone virtuoso Lydia Kenny would present a considerable challenge for any pair of microphones. The dynamic range is huge. It is packed with fine detail of tone and texture, from the delicate phrasing of the piano accompaniment to the rapid articulation of the blistering runs on the saxophone at full volume. The way that the acoustics of the hall support the music is also very subtle.

Having worked a great deal with jazz and rock ‘n’ roll over the years I had never previously been a fan of classical saxophone, but this excerpt from Lydia’s performance of ‘Fantasie’ by Jules Demersseman is quite simply an irresistible tour de force of 19th century technique and musicality. Demersseman was a friend of the inventor Adolphe Sax and the piece was published by Sax.

Pittville Pump Room in Cheltenham (UK) had its heyday in the mid-19th century and its spacious acoustic and glorious Regency architecture is the perfect setting for this recording. The Extinct Audio BM9 crossed stereo pair flown below the chandelier also look very cool!!

CLICK ON PIC  to listen

 Lydia Kenny Alto Saxophone accompanied by Damian Kenny Piano.
Lydia Kenny Saxophone with Damian Kenny Piano

Lydia Kenny is the winner of Gloucestershire Young Musician of the Year 2018

STC4113 Cardioid Ribbon Microphone (c.1967) Restoration

STC4113 Before Restoration

I have recently been generously given this STC4113 cardioid ribbon mic which is rather in need of some TLC. The socket on the bottom is badly damaged and I don’t even know if it works. I think that it will make a nice little restoration project. However, as yet, I haven’t fathomed out how to take it apart!

The 4113 was designed by Michael Gayford (STCs chief designer) who was also responsible for the 4104 noise-cancelling lip mic, and played a key role in designing the famous BBC / STC4038 which is still made by Coles today.stc-advert-1968

In today’s money 11gns (ie £11.11s) is worth about the price of a Shure SM58

Although it was the cheapest of STCs microphones the 4113 features an unusual and innovative design and Gayford’s  patent (filed in 1963) makes interesting reading.

Michael Gayford’s Patent for the STC4113

The plastic horn arrangement used in this mic to create a cardioid polar pattern appears to be somewhat similar to the one that is to be found in the Beyer M260.  In both mics the plastic horn causes a shift in the phase relationship between the front and rear of the ribbon thereby modifying the polar pattern from the usual figure of eight to hypercardioid in the case of the Beyer, and cardioid in the STC.

So on with the restoration. My first job is to sort out that connector…….. I will report back.

SOME WHILE LATER……………………………………………………………………………..

The connector problem has been solved. Preh, the company who made the original connector still make exactly the same connector. So I have bought a brand new replacement!

Having prised off the grill it was immediately obvious that the ribbon was in need of replacement.  So I decided to take the whole thing to pieces and re-build it! As you can see in the pictures below the plastic horn is glued to the circuit board, which makes it a bit of a pig to get apart! After prising it all all round with the blade of a knife the glue eventually gave way without breaking the board. Phew!!

STC4113 Dismantled Pic 1STC4113 Dismantled Pic 2And now all I need to do is to make an new ribbon, line it up in that gap, get it nicely tensioned and do up the clamps without breaking it!!!!!

This may take some time …………………………………………..

Re-ribboning and rebuilding.

Da Dah!

STC4113 Fully RestoredFully restored and repainted !!                                                                                      OK now to find out what it sounds like……………….

CLICK HERE for  my first recording which is a simple voice test.

And now for something completely different………

 CLICK here for Ukulele and Flugelbone!