Angelic Sound One (10) Test Results
This week Fire Wolf shared with me the test results – the Frequency Response Curve and the Impedance Curve – the most important performance data for a speaker design, together with some other basic parameters.
To add a level of objectivity I thought I should seek someone’s help. After some research and “working” with ChatGPT, below is a consolidated summary.
Frequency Response Curve:
Low and Mid Frequencies (200 Hz–1 kHz):
The response is smooth and balanced, with no significant dips or peaks in this range. This ensures accurate reproduction of vocals and instruments.
There is no dip in the 300–500 Hz range, indicating consistent performance in the lower midrange, which contributes to natural sound.
High Frequencies (1 kHz–20 kHz):
The response is stable with minor fluctuations, ensuring detailed and clear treble reproduction without harshness or sibilance.
Ultrasonic Range (>20 kHz):
The response rises sharply after 30 kHz, peaking near 40 kHz. While outside the audible range, this extended high-frequency capability may enhance the perceived "airiness" or detail due to harmonic interactions.
Speaker sensitivity is ~90 dB.
Frequency range: 29 Hz-30 kHz +/-3dB (F3 data provided separately)
Impedance Curve:
Low Frequencies (<100 Hz):
A resonance peak near 30 Hz reflects the speaker’s tuning frequency, likely set by the enclosure design.
The impedance drops to its lowest point of 4 ohms at around 80 Hz, indicating a dip that must be accounted for in amplifier matching.
Mid and High Frequencies (>100 Hz):
The impedance stabilizes around 10–12 ohms in the mid and high-frequency range, which is typical for consumer speakers.
Minor peaks are observed around 2–5 kHz, likely due to crossover or driver interactions.
Nominal Impedance:
Based on the observed minimum impedance of 4 ohms, the nominal impedance is calculated as approximately 5 ohms to meet the 80% threshold.
Overall Performance Summary:
Strengths:
Smooth frequency response across the audible range (20 Hz–20 kHz) ensures balanced and natural sound reproduction.
Extended high-frequency performance beyond 30 kHz indicates high-quality tweeter design.
Stable midrange and high-frequency impedance ensure compatibility with a wide range of amplifiers.
Considerations:
The dip to 4 ohms at 80 Hz may challenge some amplifiers, particularly those that struggle with low-impedance loads. Ensure an amplifier stable down to 4 ohms is used for optimal performance.
These testing results are promising and align with my design goals! However, the true test will come when I listen to the final product, which is still weeks away.
I'm eager to hear the recording!
Frequency Response Curve
Impedance Curve