It will come as no surprise that I have quite a few Reslo mics in my collection.
Reslosound were a British company based in Romford who made some of the most recognisable mics in the 1940s, 1950s and 1960s.
I have a number of these RBT ribbon mics, which are possibly the best known as Reslos and there are plenty of pictures of The Beatles using them at the Cavern Club and elsewhere. The reality is that the frequency response is limited and the impedance (and thus output) very low so without modification they’re more a curiosity than an everyday mic.
Here’s a bit of blurb I found on Vintagemicrophoneworld.com…
The Reslo RBT/L is a small, British made, ribbon microphone, from the end of the Fifties, it had a bi-directional pick up pattern. The fairly simple design had a ribbon housing in a replaceable bakelite frame, to simplify the procedure of changing the ribbon, when blown (which happened often with the fragile ribbons). Acoustic pads could be inserted in the microphone, to enhance dampening of loud signals, or to make it more directional, by dampening only the back side. They were produced until the end of the Sixties, and were often used for P.A., or at home, together with a tape recorder.
The RBT/L is often referred to as ‘the Beatles mic’ because these mics were used at the Cavern Club in Liverpool, for vocals, by the Beatles (as well as by a lot of other British performers and clubs of the Sixties). Many of these microphones are still around, and sought-after, because of the Beatles connection, and their Sixties sound.
I have several of these in lovely cosmetic condition, but they’re not rare. I’ve seen them on eBay and elsewhere for around £500 – an awful lot for what was very cheap (if groovy) mic in its day. I do have one elongated double ribbon version which Liam at Toerag tells me is a very useable (and rare) version, but I’ve yet to give it a try – I’ll post a picture soon.