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Product Archive

EQ-215

Two-channel 2/3-octave graphic equalizer with integrated 2-way electronic crossover support.

Category

Equalizer / Processor / Crossover

Series

Signal Processing

Era

Early 1990s processor era (manual archive source)

EQ-215 reference image
EQ-215 manual cover page rendered from archived PDF.

Specifications

Equalizer Bands
15 per channel (30 total)
Equalizer Center Frequencies
25Hz to 16kHz (2/3 octave spacing)
Equalizer Range
+/-12dB per band
Crossover Type
Selectable high-pass and low-pass modes
Crossover Slopes
12dB and 18dB per octave options
Crossover Frequency Range
30Hz to 6kHz
Input Sensitivity
200mV to 8V
Input Impedance
20k ohms
Output Impedance
100 ohms
Output Voltage
8V max
Signal to Noise Ratio
>100dB
THD
<0.05%
Power Requirements
13.8VDC, 0.5A (3A fuse)
Dimensions
9.5"W x 5.75"D x 1.3"H

Visual Identification Notes

  • White faceplate with blue Phoenix Gold graphics and dual-bank slider layout.
  • Two 15-band slider rows are the fastest visual identifier for EQ-215 family units.
  • Document rear connectors and selector switches before restoration work.

Known Issues

  • Slider contamination can introduce scratchy or inconsistent EQ behavior.
  • Aging power and signal capacitors may raise the noise floor over time.

Recommended Service Actions

  • Clean and exercise all slider controls before diagnosing board-level faults.
  • Verify crossover switch behavior and output mode selection after recap service.
  • Measure channel matching and noise floor before and after service.

Parts List

  • Dual op-amp for preamp / crossover stage

    Original: Legacy dual DIP-8 op-amp (marking varies by production run)

    Replacement: Low-noise audio op-amp DIP-8

    Verification: Proposed

DigiKey Recommendations

  • Audio-grade dual op-amp replacement

    DigiKey: P23456-ND

    Placeholder DigiKey reference. Verify stability and compensation in original circuit before bulk install.

    Open DigiKey reference

Gallery

EQ-215 reference image

EQ-215 reference image

EQ-215 manual cover page rendered from archived PDF.

Historical Notes

  • Signal Processor Manual Baseline

    Archived processor documentation covers EQ-215/EQ-215ix plus EQ-230/EQ-232 equalizer entries, AX-series crossovers (including AX-204A/AX-406A), and Bass Cube hardware, providing a primary-source baseline for specs and restoration notes.

Source-Backed Verification

  • Processor manual archive index for EQ, crossovers, and bass processors

    Cross-checked
    • The EQ/DEQ folder lists EQ215 and EQ215ix manuals.
    • The Crossovers folder lists AX406A documentation.
    • The Basscubes folder lists BassCube manual files and supplemental notes.

    Source: Phoenix Phorum Manual Archive - Processors

    Open source page

  • EQ-215 and EQ-215ix archived manual specifications

    Cross-checked
    • EQ-215 manual references 15 bands per channel and crossover options in the 30Hz-6kHz range with 12/18dB per octave modes.
    • EQ-215ix manual lists >100dB S/N, <0.05% THD, 20k-ohm input impedance, and 8V max output.
    • Both manuals in the same archive family use the 13.8VDC / 3A fuse baseline for operating power.

    Source: EQ-215 Manual (archive PDF)

    Open source page

Sources / Notes

  • EQ-215 Manual (archive PDF)

    Primary source for EQ-215 feature and specification values.

    Open source

  • Processor Manual Index - EQ/DEQ

    Directory listing confirms archived EQ-215 documentation.

    Open source

Model Disclaimer Block

Repair information is provided at user's own risk. Verify all measurements and polarity before power-up.

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