RM 58 Classic Stereo Limiter
with 456 HD®


The RM 57 and RM 58 Stereo Limiters were and still are regarded today by many leading producers as a Holy Grail piece of vintage analogue equipment and were manufactured in New York by Roger Mayer Electronics Inc. They have a 50 year studio history and heritage of being used on many hit records since their introduction. From Olympic studios in London famous for the Rolling Stones recordings and of course Jimi Hendrix's iconic "Axis Bold as Love" to New York's Record Plant, Electric Lady, Atlantic Records, Columbia Records, Hit Factory, Media Sound, Elektra Records, Vanguard Records, Mayfair Studios, A&R Studios the unique and musical properties of the RM 57 and 58 became a go to choice for producers who needed an alternative more dynamic sounding limiter than the traditional radio station type of limiter that were in use.

Other recording studios quickly followed both in the USA, England and Europe and the sound of the RM 57 and 58 can heard on the tracks from these famous studios who were responsible for many legendary iconic recordings of so many famous artists: Jimi Hendrix, Stevie Wonder, Led Zeppelin, Aerosmith, John Lennon, to name a few. Leading mastering studios also used RM Limiters and Atlantic Records, Record Plant; Elektra Records had custom versions made. So it would be accurate to say that you have already heard them in action.

Recording Console versions were also installed in our custom recording desks as well on a Custom Film Location Mixer with a RM 58 Stereo Limiter for Rolf Pardula used for main dialogue capture on many Hollywood major film releases. Rolf also went on to win an Emmy for TV series sound recording using his custom RM location recording mixer. Fred Weinberg Productions went on to win multiple Clios for commercial TV Music using both a custom RM Console and RM 58 limiters.

Technical Description

A unique proprietary FET gain reduction circuit uses the input information in a feed forward manner to control both positive and negative peaks. This dynamically controlled gain reduction method enables the Stereo Centre image to be maintained whist using significant amounts of gain reduction thus making it popular for vinyl mastering applications. It is almost the opposite of using the old type of limiter where the information is integrated over a period of time and then applied to control gain. The limiting ratios are not specified because with this dynamic gain reduction method occurring in real time they are always changing to produce a very natural and musical sounding result. The wide range of Attack and Release times available enables many difficult recording situations to be recorded perfectly.

The closely dynamically matching of our 57 or 58 limiters is crucial to enable successful Master 2 Track Bus production tasks. Individual superb performance with Bass Guitars, Vocals, Drums. Strings and Brass for initial tracking etc also benefit from this dynamic matching to enhance the overall performance when using multiple microphones set-ups.

The audio circuit path is all Class A low noise advanced discrete design only using the best available components. The resulting Class A circuit path provides the ultimate audio transparency with an extended frequency response to 100 KHz. The output is also Class A - ultra low output impedance.

Technically the design was very advanced and today its performance still stands out and compares very favourably to newer designs. It is more open and dynamic sounding than many of the old type of traditional Radio Station Type of Limiters So take time out to isten to our latest version of a truly important piece of audio equipment with an impeccable heritage and history to understand and "experience the difference".

As this Classic RM 58 design has long history of success and has been used in so many landmark recordings the actual progress and evolution to our current model has been a case of simply bringing the design forwards using today's technological improvements. This great design is then combined with our latest high speed analogue dynamics process to produce a truly unique compact product with all the modern features for DAW recording.

RM 58 Classic Stereo Limter Technical Features

  • 2 Dynamically Matched Channels
  • Optimal Stereo Performance for 2 Channel Mixing
  • 456HD® Tape Simulation
  • 456HD® Trim control for easy DAW setup
  • Choice of Continuous or 21 position stepped Threshold and Output potentiometers
  • Wide Range 10 position stepped Attack and Release time constants
  • VU Monitoring of Input, Output or Gain Reduction Levels
  • Ultra Wide Band Hand Wound Custom Ferrite Transformer Balanced Inputs and Outputs
  • Hand Built in the United Kingdom
  • Ultra Low Noise Triple shielding construction using 6 layer PC Card
  • Channel Link switch with LED Indication
  • Channel Bypass switches with LED Indication
  • 456HD® Bypass switches with LED Indication
  • Front Panel access to VU Meter Calibration
  • Front Panel access to Gain Reduction VU Zero Set
  • Gold Plated Neutrik XLR Connectors
  • 3U Standard 19 inch Rack Mount - w 483 x h 133 x d 220mm - weight:4.2Kg
  • Stainless Steel Construction
  • 48 Volt DC Meanwell Universal World AC Power Supply supplied