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Product Archive

Bass Cube

Dedicated bass processing platform with selectable contour control, phase switching, and line-driver output capability.

Category

Equalizer / Processor / Crossover

Series

Signal Processing

Era

1990s processor era (manual archive source)

Bass Cube reference image
Bass Cube manual cover page rendered from archived PDF.

Specifications

Input Voltage
200mV to 8V RMS
Input Impedance
20k ohms
Input Frequency Response
10Hz to 100kHz
Output Impedance
100 ohms
Output Voltage
8V RMS max
Output Frequency Response
10Hz to 500Hz
Signal to Noise Ratio
>95dB
THD
<0.05%
Power Requirements
13.8VDC, 0.2A
Dimensions
2.0"H x 5.75"W x 9.5"D

Visual Identification Notes

  • Compact processor format with dedicated bass-shaping controls and phase switch.
  • Document switch positions and contour knob settings when recording baseline behavior.
  • Capture all panel text clearly for future control-map references.

Known Issues

  • Control wear and oxidation can cause intermittent output changes.
  • Unverified prior tuning settings can mask actual circuit faults.

Recommended Service Actions

  • Return controls to known reference positions before fault isolation.
  • Validate output behavior in bypass/flat states before contour tuning tests.
  • Record final calibrated settings with measurement notes for repeat installs.

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

Bass Cube reference image

Bass Cube reference image

Bass Cube 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

  • Bass Cube archived manual specifications

    Imported - Needs Primary Verification
    • Bass Cube manual lists >95dB S/N, <0.05% THD, and up to 8V RMS output.
    • Input range is listed as 200mV to 8V RMS with 20k-ohm input impedance and 100-ohm output impedance.
    • Published dimensions are 2.0in H x 5.75in W x 9.5in D at 13.8VDC / 0.2A operating power.

    Source: BassCube Manual (archive PDF)

    Open source page

Sources / Notes

  • BassCube Manual (archive PDF)

    Primary source for Bass Cube specification values.

    Open source

  • Processor Manual Index - Basscubes

    Directory listing confirms archived Bass Cube 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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