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An Audiophile Classic... with "ONLY" 54 Parts? B&W 802 Matrix

GR-Research2024-06-22
Tuesday Tech Talk#audiophile#hifi#loudspeaker#fullrange driver#comb filtering#GR-Research#Danny Richie#crossover design#measurements#best loudspeakers#tube amplifier#preamplifier#diy speakers#audiophile speakers#audiophile music#amplifier#best voice#audiophiles#high end#baffle step loss#open baffle#fast bass#subwoofers#line source#drivers#high power handling#low distortion#the room#speaker upgrade#audiophile loudspeakers#crossovers#DIY Audio#soundstage
18K views|29 days ago
💫 Short Summary

The video examines a vintage BMW model 802 S2 speaker with design flaws and cheap internal components but offers a balanced response. It features a good frequency response, linearity, and phase coherence, with improvements in imaging and sound stage layering. The speaker's spectral decay and woofer response are adjusted for a balanced output and accuracy, with enhancements in vertical off-axis response. It maintains consistent response and impedance curve for amplifier compatibility, with structural and damping upgrades promising better performance. The speaker encourages viewer engagement and offers upgrades on the website.

✨ Highlights
📊 Transcript
Overview of the vintage BMW model 802 S2 speaker.
02:26
The speaker has a three-way design with paper cone drivers and features bracing in the Matrix series design and Kevlar material.
Despite design flaws and cheap internal components, the speaker offers a fairly balanced response without excessive brightness.
The speaker's crossover has 54 parts with common electrical wiring and iron core inductors.
Overall, the speaker provides a decent listening experience with minimal fatigue, despite some shortcomings.
Summary of Speaker Design Evaluation
04:17
The speaker's frequency response and linearity are good, with a slightly voiced down Tweeter to avoid overpowering brightness.
The design includes modular components to minimize surface reflections, improving imaging and sound stage layering.
The drivers maintain phase coherence over a wide range, contributing to good on-axis and off-axis responses.
The impedance is tuned low, requiring a stable amplifier, and the evaluation process involves analyzing individual driver responses and correcting any issues for potential improvement.
The segment focuses on spectral decay and woofer response issues in an audio device, with a specific emphasis on output loss and step loss at various frequencies.
10:11
Speaker design and crossover points are adjusted to tackle these issues, resulting in a more balanced response and increased accuracy.
Notch filters are utilized to eliminate humps and ringing in the mid-bass driver's response, leading to a remarkable overall performance.
The adjustments also improve the vertical off-axis response of the audio device, further enhancing its performance and sound quality.
Improvements in Speaker Performance
11:11
The speaker provides accurate sound representation from any position in the room.
Spectral decay is cleaner with improved detail and resolution.
Impedance curve stays around 4.9 ohms for amplifier compatibility.
Crossover quality is enhanced with fewer parts and high-quality components for better clarity.
Speaker expresses gratitude for viewers watching the upgrade videos.
14:22
The opportunity to see the original speakers and their inner workings is highlighted.
Viewers are encouraged to leave comments and subscribe for future content.