KEF SP4057B1AA vs ProAc CENTRE-VOICE
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Choosing between the KEF SP4057B1AA and ProAc CENTRE-VOICE? Both compete in the Speaker (Center) segment. Here’s how they compare across the specs that matter most for your home theater.
Pricing for both models is currently unavailable. Check the retailer links below for current deals.
Looking at overall performance dimensions: The KEF SP4057B1AA scores higher in value, audio quality, volume/SPL. The ProAc CENTRE-VOICE leads in form factor, room fit.
For speaker performance, the ProAc CENTRE-VOICE is more sensitive at 88 dB vs 87 dB. Higher sensitivity means your receiver works less hard, leaving more headroom for dynamic peaks in movie soundtracks. A speaker rated 3 dB higher in sensitivity needs half the amplifier power to reach the same volume.
These two Speaker (Center) options trade wins across different dimensions. The right choice depends on which specs matter most for your room and listening preferences — review the detailed table below to decide.
For most home theaters, the KEF SP4057B1AA is the stronger choice — it leads in 3 of 5 scored dimensions. The ProAc CENTRE-VOICE makes more sense if you prioritize the 2 dimensions where it leads.
Performance Overview
Scores based on specs and category benchmarks (0–100 scale)
KEF SP4057B1AA
ProAc CENTRE-VOICE
Detailed Specifications
| Specification | ||
|---|---|---|
| Price | N/A | N/A |
| Driver Config | 3-way | 3-way |
| Sensitivity | 87dB | 88dB |
| Impedance | 4Ω | 4Ω |
| Freq Response Low | 67Hz | 50Hz |
| Freq Response High | 28000Hz | 30000Hz |
| Crossover | — | — |
| Bi-Amp Capable | No | Yes |
| Rec. Power Min | 15W | 10W |
| Rec. Power Max | 200W | 100W |
| Mounting Type | center | center |
| Mounting Depth | — | — |
| Cutout Diameter | — | — |
| Cutout Width | — | — |
| Cutout Height | — | — |
| Wall Thickness Min | — | — |
| Wall Thickness Max | — | — |
| Back Box Included | No | No |
| Back Box Required | No | No |
| Mounting Mechanism | — | — |
| Installation Type | — | — |
| Stud Spacing | — | — |
| Paintable Grille | No | No |
| Magnetic Grille | No | No |
| Grille Shape | — | — |
| Connector Type | — | — |
| Wire Gauge Max | — | — |
| Angle Adjustable | No | No |
| Pivot Angle | — | — |
| Treble Attenuation Switch | No | No |
| LCR Capable | No | No |
| Coaxial | No | No |
| IP Rating | — | — |
| Moisture Resistant | No | No |
| UV Resistant | No | No |
| Salt Spray Rated | No | No |
| Enclosure Material | — | — |
| Grille Material | — | — |
| Bracket Type | — | — |
| Bracket Included | No | No |
| Dual Voice Coil (SDI) | No | No |
Key Differences
- Rec. Power Max: KEF SP4057B1AA at 200W vs ProAc CENTRE-VOICE at 100W
- Rec. Power Min: KEF SP4057B1AA at 15W vs ProAc CENTRE-VOICE at 10W
- Freq Response Low: KEF SP4057B1AA at 67Hz vs ProAc CENTRE-VOICE at 50Hz. Determines how much bass a speaker handles on its own versus relying on a subwoofer for low-end support.
- Freq Response High: KEF SP4057B1AA at 28000Hz vs ProAc CENTRE-VOICE at 30000Hz
- Sensitivity: KEF SP4057B1AA at 87dB vs ProAc CENTRE-VOICE at 88dB. Higher sensitivity means your receiver works less hard, leaving more headroom for dynamic peaks in movie soundtracks. A speaker rated 3 dB higher in sensitivity needs half the amplifier power to reach the same volume.
Which Should You Choose?
Choose ProAc CENTRE-VOICE if you want:
- + better sensitivity — higher sensitivity means your receiver works less hard, leaving more headroom for dynamic peaks in movie soundtracks
- + better freq response low — determines how much bass a speaker handles on its own versus relying on a subwoofer for low-end support
See Where These Rank
Check our editorial rankings to see how KEF SP4057B1AA and ProAc CENTRE-VOICE compare to the rest of the field.
Best Speaker (Center) RankingsRelated Calculators
Specifications sourced from manufacturer datasheets and verified against retailer listings. Prices updated hourly from authorized retailers. Scoring uses our open methodology — products are never ranked, promoted, or suppressed based on affiliate commission rates.
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