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Product Archive

M44

Four-channel M-series platform with integrated crossover flexibility and strong period-correct install relevance.

Category

Amplifier

Series

M Series

Era

1992-1995 (archived FAQ/manual sources)

M44 amplifier photo — Archived M44 product photo from Phoenix Gold FAQ M Amplifiers page.

Specifications

Output Power (4 ohm @ 12.5/14.4V): 40/55 WRMS x4
Output Power (2 ohm @ 14.4V): 80 WRMS x4
Output Power (4 ohm bridged @ 14.4V): 105 WRMS x2
Total Dynamic Output: 352 WRMS
Frequency Response: +/-1dB from 20Hz to 20kHz
Signal to Noise Ratio: >100dB
Input Sensitivity: 200mV to 2V
Input Impedance: >10k ohms
Input Voltage Range: 10.5V to 15.0V
Typical Idle Current: 1A
High-Pass Frequencies: All-pass, 75Hz, 125Hz, 175Hz
Low-Pass Frequencies: 50Hz, 75Hz, 125Hz, 175Hz
Bass EQ: 0 to +18dB @ 45Hz
Minimum Impedance: 2 ohm stereo (manual reference)
Dimensions: 18.0"L x 10.6"W x 2.0"H

Visual Identification Notes

Manual pages in gallery provide baseline control-panel visual references.
Intake photos should include terminal block and panel legends.
Track board revision tags where visible during service.

Known Issues

Wear-related connector oxidation and control noise.
Potential drift in aged electrolytic components.

Recommended Service Actions

Inspect PSU and signal-path caps during baseline service.
Test channel balance and offset stability after warm-up.
Record replacement-part IDs and measurements for repeatability.

Parts List

Main power reservoir capacitor (4700uF / 50V class)
Original: 4700uF 50V radial electrolytic (legacy OEM variant)
Replacement: 105C low-ESR radial capacitor, matched lead spacing
Verification: Community Verified
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

4700uF 50V low-ESR radial capacitor
DigiKey: P12345-ND
Placeholder DigiKey reference. Confirm ripple current, lead spacing, and can diameter against board footprint before finalizing.
Open DigiKey reference
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

M44 amplifier photo — M44 amplifier photo
Archived M44 product photo from Phoenix Gold FAQ M Amplifiers page.

M44 manual cover — M44 manual cover
Owner-manual cover extracted from archived PDF for visual identification and layout reference.

M44 manual page 2 — M44 manual page 2
Manual interior page used as technical and historical reference material.

M44 manual page 3 — M44 manual page 3
Additional manual page for control labels, tables, and period styling details.

Historical Notes

Early Phoenix Gold and M-Series Emergence
Archived Phoenix FAQ material lists M-series output tables and identifies a 1992-1995 production window, while secondary history notes describe the broader late-1980s to early-1990s brand ramp.

Source-Backed Verification

M-Series archived FAQ specs and timeline
Cross-checked
- The FAQ lists M25, M50, M100, and M44 model-level output tables at 12.5/14.4V and 14.4V load conditions.
- The same page states M-series production years as 1992-1995.
- The archived FAQ includes period product photos that are now used as top gallery images in this archive.
Source: Archived Phoenix Gold FAQ - M Amplifiers
Open source page
M-Series models with archived owner manuals
Cross-checked
- Manual index lists M25, M44, M50, and M100 model manuals.
- Each listed manual is available as downloadable PDF from the same archive.
- These documents are used as primary references for gallery cover pages and model-page source notes.
Source: Phoenix Phorum Manual Archive - M Amps
Open source page

Sources / Notes

Archived Phoenix Gold FAQ - M Amplifiers
Primary source used for M44 spec table values and product photo.
Open source
M44 Owner Manual
Primary manual source used for crossover/frequency and control-function verification.
Open source
M-Series Manual Index
Directory listing confirms archived M-series documentation.
Open source

Model Disclaimer Block

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