Reference Design · Full-range concept
Penn FR5
Single 5″ full-range · Ported (EBS) · Concept
A single-driver full-range concept around a 5″ full-range driver in a compact extended-bass-shelf reflex enclosure. A desktop / nearfield monitor study from the Speaker Lab — one driver, no crossover, full range.
Specifications
Engineered, then verified.
Every figure on this page traces to this cabinet’s design data in the Penn Audio Speaker Lab, where it’s modeled as a complete system and verified before production.
| Configuration | Single-driver full-range, vented (extended-bass-shelf) |
|---|---|
| Frequency response (target) | 70 Hz – 18 kHz |
| Cabinet tuning Fb | 64 Hz |
| Sensitivity | 89.5 dB SPL (2.83 V / 1 m) |
| Maximum SPL | 105 dB @ 1 m (design target) |
| Power handling | 120 W (program) |
| Nominal impedance | 8.0 Ω |
| Transducer | 1 × 5″ full-range driver (8 Ω) |
| Crossover | None — single-driver full-range |
| Enclosure | 15 mm MDF, ported (EBS alignment) |
| Dimensions (W × H × D) | 160 × 280 × 220 mm |
| Net weight | < 5.5 kg |
Inside the design
Why it’s built this way.
Extended-bass-shelf
An oversized EBS box with a low tuning ratio trades ~1.5–2 dB of upper-bass level for usable reach to ~70 Hz from a 92 Hz-Fs driver — and the gentle midbass shelf helps offset desktop boundary gain.
Single-driver coherence
One light cone with a 25 mm voice coil carries the whole band with no crossover in the signal path — a point source with the simplicity and phase coherence single-driver designs are prized for.
Penn Audio
Hear the FR5 on your system.
Book a demo, or download the full datasheet.