UREI 533 Graphic Equaliser


In stock


Universal Audio was one of the early pioneers in audio equipment. Founded in 1946 by Bill Putnam, UA produced recording equipment as a sideline to his Universal Recording record company. The company was later renamed United Recording Electronics Industries, giving us the famous UREI name & logo

Bill Putnam was responsible for many innovations in recording including the 1176 compressor, the valve Teletronix LA/3A and transistor UREI LA4/A levelling amplifiers. UREI produced a wide range of products and the 535 is one of many equalisers they produced in the late 70s and 80s

The 533 is a single channel version of the stereo 535 graphic equaliser. It has ten bands per channel, in / out switch, input gain trim and a transformer-coupled output with overload LED. It’s a simple design, owing a lot to the earlier 527 & 529 mono graphics

Like all UREI kit from this period, it’s built like a tank with a very functional case, secured by the traditional UREI exposed hex-head screws, and a beautifully-finished aluminium front panel. Inside, it’s best-practice, 1970s-style, with a thick circuit board, huge (by today’s standards) through-hole mounted components, massive American transformers and lots of hand-wiring

The 533 is a 10-band equaliser with frequencies at octave spacings. It has a reputation as a great guitar EQ – the bands are wide enough to be smooth, but tight enough to pull out or accentuate specific frequency bands. It definitely sounds crunchier than plugin EQs and can be as subtle or as lairy as you like, depending how far you push it

Like all UREI gear, the 533 has tons of sonic character and great visual appeal. It has a functional appearance, like much German audio equipment, so simple & logical that it can’t be bettered. That combination of simplicity, rugged construction & great sonics is as compelling now as it was in the 1970s

Great analogue outboard gear never dates and never devalues if it’s as simple, effective and well-designed as this UREI equaliser. In that respect, it’s the polar opposite of software plugins. A UREI 533 will sound unlike any other EQ you own and give you no-faff equalisation for guitars, loops, drum ambience, effects – whatever you like

UREI 533 Filter Centre Frequencies

  • 31.5 Hz
  • 63 Hz
  • 125 Hz
  • 250 Hz
  • 500 Hz
  • 1 KHz
  • 2 KHz
  • 4 KHz
  • 8 KHz
  • 16 KHz
Balanced stereo inputs & outputs are provided on barrier strips and the unit works at a nominal 0 dBm level. The input is electronically balanced and the output uses a transformer. Mains voltage is switchable between 110 and 220 Volts via a rear-panel switch. The mains cable is captive & fitted with a new UK mains plug fused at 3 Amps

1U device suitable for mounting in a standard 19" rack. Standard IEC power input. UK, Euro or US IEC power lead supplied on request

Installation & Service Manual



In superb condition, unmarked apart from odd tiny scratches and some rack rash. See the photos to appreciate the condition! This is a very usable equaliser

Tested & working 100%. Photos show the equaliser for sale

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