Reference Design · Install column
Penn Choir Column P15
Dual 5.25″ sealed LF + 8× 4″ coaxial array · Sealed
A slim, furniture-grade vertical column for church and chapel installation. A phase-coherent dual 5.25″ sealed low-frequency section pairs with an eight-driver 4″ coaxial mid/high array, fan-tilted for wide, even vertical coverage from the front pew to the back row.
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 | Two-way install column, sealed LF section + coaxial mid/high array |
|---|---|
| Frequency response (target) | 85 Hz – 19 kHz |
| Sensitivity | 99 dB SPL (array sum, design target) |
| Maximum SPL | 115 dB @ 1 m (design target) |
| Power handling | 400 W (program, design target) |
| Nominal impedance | 4.0 Ω |
| LF section | 2 × 5″ full-range, sealed (top + bottom) |
| Mid/high array | 8 × 4″ neodymium full-range, ±6° symmetric fan |
| Crossover | LR4 @ 350 Hz (LF → coaxial array) |
| Coverage (target) | 110° H × 25° V (−6 dB) |
| Enclosure | Sealed, braced plywood column |
| Dimensions (W × H × D) | 152 × 1524 × 152 mm |
Inside the design
Why it’s built this way.
Why sealed
Speech and choral program have aggressive envelope dynamics that a ported box blurs with group delay near tuning. The sealed alignment trades deep-bass reach for transient accuracy and clean intelligibility — the right call for a column meant to live in a room without sub augmentation.
Phase-coherent LF
The two 5.25″ drivers sit symmetrically at the top and bottom of the column so their combined acoustic center lands exactly on the array midpoint — perfectly phase-aligned with the coaxial array centroid through the 350 Hz crossover.
Symmetric fan tilt
A ±6° symmetric fan on the 4″ array widens vertical coverage so seated and standing congregants get equivalent SPL, rather than a J-array that would favor the back rows.
Penn Audio
Hear the Choir Column P15 on your system.
Book a demo, or download the full datasheet.