UREI 535 Dual Graphic Equaliser #1


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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 535 is a two-channel graphic equaliser with 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 535 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 535 has tons of sonic character and great visual appeal. It has a functional appearance, like much German audio equipment, so simple & so 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 535 will sound unlike any other EQ you own and give you two channels of no-faff equalisation for guitars, loops, drum ambience, effects – whatever you like


UREI 535 Filter Centre Frequencies
1   31.5 Hz
2 63 Hz
3 125 Hz
4 250 Hz
5 500 Hz
6 1 KHz
7 2 KHz
8 4 KHz
9 8 KHz
10 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 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 mains input. IEC mains lead supplied on request
Installation & Service Manual http://www.jblproservice.com/pdf/Vintage%20JBL-UREI%20Electronics/UREI-533_%20535.pdf
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 and is very collectible