Rupert Neve Designs 551 Inductor EQ

Rupert Neve Designs 551 Inductor EQ

Rupert Neve Designs 551 Inductor EQ

B&H # RU551 MFR # 551
Rupert Neve Designs 551 Inductor EQ

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  • 1Description

The 551 Inductor EQ from Rupert Neve Designs is a three-band EQ with custom-wound inductors, transformers, and class-A gain blocks. The low-frequency band on the 551 can be used as either a shelf or a peak filter, adding punch, dimension, and control to your low end. The 551's inductor midrange band is ideal for sweetening vocals and instruments while bringing them forward in a mix, and its proportional "Q" response makes it well suited for minimizing problematic frequencies. The high-frequency band is a hybrid vintage/modern design, blending inductor circuitry with capacitor-based topologies to achieve vintage tones with enhanced control. The high-pass filter is a 12 dB/octave design with a fixed 80 Hz frequency, and can be used in tandem with the low-frequency EQ to add low-end presence without clouding the source material.

Both the high and low band can be switched from shelf to peak curves and offer 15 dB of boost or cut. The high band can be switched from 8 to 16 kHz, and the low band can be selected at 35, 60, 100, or 220 Hz. The inductor-based mid band offers six center frequencies: 200, 350, and 700 Hz, and 1.5, 3, and 6 kHz. The mid band also has an "MF Hi Q" switch to narrow the bandwidth (increase the Q) of the filter.

Engages all bands of the equalizer except the hpf
Adjusts up to 15 dB of boost or cut at selected low, mid, and high frequencies
Four different EQ curves to finesse the high-frequency content
Peak mode utilizes an inductor and capacitor circuit to create the bell-shaped curve
MID FREQ rotary switch has six positions to select the center frequency of the mid-band EQ stage: 200, 350, and 700 Hz, and 1.5, 3, and 6 kHz
Engages a 12 dB per octave high-pass filter set to 80 Hz
Four LOW FREQ options: 35, 60, 100, and 220 Hz
UPC: 752423657193
In the Box
Rupert Neve Designs 551 Inductor EQ
  • Limited 1-Year Warranty
  • Table of Contents
    • 1Description
    Noise Equalizer Bypassed: Better than -102 dBV (measured at Main Output, un-weighted, 22 Hz to 22 kHz, source impedance 40 Ohms balanced)
    Equalizer Engaged: Better than -94 dBV (measured at Main Output, un-weighted, 22 Hz to 22 kHz, source impedance 40 Ohms balanced)
    Frequency Response Equalizer Bypassed: +/- 0.1 dBu from 20 Hz to 31.5 kHz - 1 dB @ 120 kHz (main output, no load)
    Equalizer Engaged: +/- 0.25 dBu from 20 Hz to 45 kHz - 2 dB @ 120 kHz (main output, no load)
    Maximum Output Level Equalizer Bypassed: 23.25 dBu
    Equalizer Engaged: 23 dBu
    THD + N Equalizer Bypassed:
    @ 1 kHz, +20 dBu Output Level, No Load: Better than 0.0025%
    @ 20 Hz, +20 dBu Output Level, No Load: 0.13% Typical (2nd and 3rd harmonic)
    High-Pass Filter: -2.7 dB @ 80 Hz
    Slope: 12 dB/octave
    Equalizer Engaged:
    @ 1 kHz, +20 dBu Output Level, No Load: Better than 0.009%
    @ 20 Hz, +20 dBu Output Level, No Load: 0.13% Typical (2nd and 3rd harmonic)
    Power Requirements 120 mA on +16 VDC
    110 mA on -16 VDC
    Exterior Dimensions 10 x 8 x 3" (25.4 x 20.3 x 7.6 cm)
    Weight 2.0 lb (0.9 kg)
    Packaging Info
    Package Weight 2.1 lb
    Box Dimensions (LxWxH) 10.1 x 7.7 x 2.9"

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