Crucial Audio Studio Nugget 2025

Mint Condition. I bought it last year directly from manufacturer. Superb delay effect

Upgrade your sound system with The Crucial Audio Studio-Nugget Vacuum Tube Analog Delay. Amazing tape-like pure analog tonality, and a feature set that will blow your mind. Enter Crucial Audio’s world famous analog delay (BBD) circuitry driven by transformer-coupled Class A vacuum tube preamp stages. Prime Number and Tempo Indicators and an analog VU meter guide you towards the ultimate echoes and sonic excellence for your mix! Hand-built to order by Crucial Audio.

PRIME NUMBERS AND DELAY TIMES

Legendary producer and recording industry icon Rob Fraboni was a huge part of the inspiration to develop the Studio-Nugget’s Prime Number Identification algorithm. Professional producers and recording engineers have known that delay times/echoes set to prime numbers deliver a sonic difference in overall echo clarity and level in the mix. It can be an effective technique at any song tempo.

A prime number can only be divided by 1 and itself. Thus less likely to create phase cancellation of the fundamental frequencies during audible intermodulation events. One example is a multi-tone of 250 Hz + 1 kHz Dry and Delayed Sine Waves (summed with delay range of 80 – 120ms) @0 dBv and -10 dBv. Measurements on the Stanford Research Systems SR-760 FFT spectrum analyzer illustrate that a change of 1ms from a prime number can yield as much as -8 dBv in delay gain at the 1 kHz carrier during the 250 Hz intermodulation. Hence the audible difference of reported echo clarity and level within the frequency feast of the mix.