Known Issues
- Slider and rotary controls can drift or become noisy with age.
- Incorrect prior rewiring can create mode-selection or output-routing confusion.
Product Archive
EQ-215X (EQ-215ix)
Expanded EQ-215 variant with dual 15-band equalization and extended crossover/system-routing options, commonly listed as EQ-215X or EQ215ix.
Category
Equalizer / Processor / Crossover
Series
Signal Processing
Era
1990s processor era (manual archive source)
Specifications
- Equalizer Bands
- 15 per channel (30 total)
- Input Impedance
- 20k ohms
- Output Impedance
- 100 ohms
- THD
- <0.05%
- Frequency Response
- 20Hz to 20kHz
- Signal to Noise Ratio
- >100dB
- Max Input Voltage
- 12V
- Output Voltage
- 8V
- Power Requirements
- 13.8VDC, 0.5A
- Fuse Rating
- 3A
- Dimensions
- 9.5"W x 5.75"D x 1.3"H
Visual Identification Notes
- Shares the white/blue dual-slider look of EQ-215 with ix-specific panel labeling.
- Rear/side switch labeling and crossover controls are key to distinguishing revisions.
- Capture panel legends clearly for future revision mapping.
Recommended Service Actions
- Validate each selector path with a known-good signal before replacing active devices.
- Inspect and service control hardware first, then re-check S/N and channel tracking.
- Document switch positions used during measurement so results are repeatable.
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
Related Repair Guides
- Signal-path noise diagnosis (generic workflow)
Template process for hum, hiss, and channel imbalance root-cause analysis before replacing semiconductors.
Related Forum Threads
- Catalog scans and ad archive (contributor thread)
Crowdsourced scan quality standards and indexing conventions for source documentation.
Gallery
EQ-215X front angle photo
Community-supplied EQ-215X product photo used for visual identification of panel layout and connector arrangement.
EQ-215X front control panel detail
Front-panel view highlighting slider banks, routing controls, and legacy connector positioning.
EQ-215X top view photo
Top-side chassis and branding view to support model-revision and cosmetic restoration records.
EQ-215X (EQ-215ix) reference image
EQ-215ix 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 pageEQ-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-215ix Manual (archive PDF)
Primary source for EQ-215ix technical specification table.
Open sourceProcessor Manual Index - EQ/DEQ
Directory listing confirms archived EQ-215ix documentation.
Open source
Model Disclaimer Block
Repair information is provided at user's own risk. Verify all measurements and polarity before power-up.