SD503 vs KEF Q3 Meta
The Q3 Meta's sensitivity is 87 dB against the SD503's 89 dB and its low-frequency extension 49 Hz against 48 Hz. Both share impedance (4Ω) and ways (2).
AI-generated product photo — not official manufacturer imagery.
LoudspeakersBookshelf SpeakersDiscontinued
Estimated price (community-sourced)
$900
Around — community and catalog average, updates slowly
About the SD503
The Usher Audio SD-503 is a premium bookshelf 2-way bass-reflex speaker designed as part of Usher’s SD series. It uses the company’s 1.25-inch DMD dome tweeter and dual 5.5-inch paperfiber complex-cone bass drivers, with a focus on wide bandwidth, low distortion, and strong imaging. It is listed as a center-channel capable model in some retail listings and is shown in multiple finishes, including High Gloss Macassar Ebony, Black, and White.
Specifications
Transducer Specifications
Driver and acoustic performance characteristics
- Sensitivity
- 89 dB SPL @ 1W/1m
- Impedance
- 4Ω
- Frequency Response
- 48 Hz - 40 kHz
Speaker Design
Driver configuration and enclosure design
- Configuration
- 2-way
- Driver Type
- DMD dome tweeter and paperfiber complex cone
- Driver Size
- 5.5"
- Driver Count
- 2
- Enclosure Type
- ported
- Crossover Frequency
- 2.6 kHz
Physical Dimensions
Size, weight, and appearance
- Dimensions
- 560 × 300 × 185 mm (W × H × D)
- Weight
- 13.2 kg (29 lbs)
- Available Colors
- High Gloss Macassar Ebony, High Gloss Black, High Gloss White
Key Specifications
Sensitivity: 89 dB
Impedance: 4Ω
Frequency: 48-40000 Hz
Specifications are community-contributed and may not be accurate or complete. Verify all details with the manufacturer before making purchasing decisions. Terms & Conditions