UREI 811-C
Not much is documented about the UREI 811-C. Beyond a brief new-products note, the surviving record is thin. The 1987 item in Recording Engineer (April 1987, p.90) places the 811-C in UREI's C-series studio-monitor line, alongside the 813C and 815C. It describes a monitor with higher input sensitivity than UREI's earlier Time-Align series, rated at 99 dB SPL. The related 813C and 815C are listed at 101 and 103 dB SPL. The same note credits the 811-C with response extending beyond 17.5 kHz. It says the monitor used a new 801C coaxial midrange driver combined with a titanium-diaphragm compression driver, so that it acts as a single point source.
Production years, original pricing and detailed measured performance are not documented in the available record.
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