JBL / UREI 5547A Graphic Equalizer 1993 - 1995

JBL UREI 5547A Graphic Equalizer — 3 units available (sold as lot or individually)

Three fully tested JBL UREI 5547A Graphic Equalizer units, professionally verified using RiTA measurement software in loopback configuration. A classic piece of professional audio history from the legendary UREI lineage.

SPECIFICATIONS:

• Single channel (mono) 1/3-octave graphic equalizer

• 30 bands, ISO frequencies, 25Hz–25kHz

• ±12dB gain range per band

• Constant-Q filter design with DLT (Dynamic Laser Trimming)

• High-pass and low-pass variable filters per channel

• Relay bypass — automatic hard-wire bypass on power failure

• Electronically balanced XLR inputs and outputs (+4dBu)

• THD <0.01%, noise <-94dBm

• Made in USA (JBL/UREI Professional)

TESTED & VERIFIED — SERIAL NUMBERS:

• SN 09154 1189 — fully functional, all filters, gains and controls verified

• SN 09648 0890 — fully functional, all filters, gains and controls verified

• SN 09157 1189 — fully functional, all filters, gains and controls verified

VERIFICATION RESULTS (RiTA loopback measurement):

• Reference signal: direct loopback to RiTA reference input

• Measured signal: JBL UREI 5547A output routed back to RiTA measurement input

• All 30 filter bands verified: gain, center frequency and Q response coherent across all units

• All gain controls, bypass relay and HP/LP filters functioning correctly

• Flat magnitude and phase response confirmed in bypass mode

CONDITION: Very Good

All 3 units fully functional and professionally verified. Signs of professional use consistent with an active theatre and live sound career. All controls smooth and operational.

NOTE:

The JBL UREI 5547A is a MONO unit — each unit processes a single channel. Three units provide three independent channels of 1/3-octave graphic equalization.

PRICING:

• Full lot (3 units): 600€ (negotiable — offers welcome)

• Individual units: 220€ each

Collection preferred — Barcelona area (Esplugues de Llobregat), Spain.

Shipping possible at buyer's expense — units are rack-mount format and straightforward to ship safely.