What are the key features of the REDCATT 15NPM?

The REDCATT 15NPM features: EXTENDED FREQUENCY RESPONSE; 2 demodulation rings, lightweight carbon fiber loaded paper cone; Hi BL, Double air-gap, powerful motor structure.

What are the power handling and sensitivity specifications of the 15NPM?

The 15NPM has an AES power rating of 800 W, continuous power of 1600 W, peak power of 3200 W, and a sensitivity of 97.73 dB (1W/1m).

What are the Thiele-Small parameters of the 15NPM?

Key T/S parameters: Fs=48.00 Hz, Qts=0.460, Vas=89.90 liters, Sensitivity=97.73 dB, Bl=19.30 T·m, Xmax=5.25 mm. Magnet type: Neodymium.

15NPM - Mid-Woofer - Professional Loudspeaker Engineering

Name: 15NPM
Brand: REDCATT
SKU: 15NPMX8-262

Design Notes

The 15NPM is a truly unique full range woofer. We have designed cutting edge product, using the best available materials and highly optimized design for the best performance in its class. It delivers very high efficiency, (98 dB 1watt / 1 meter), incredibly linear frequency response characteristics with extended HF frequency response, high power handling capability, while generating ultra low harmonic distortion artifacts. The 15NPM uses a lightweight carbon fiber loaded cone assembly along with a high excursion triple roll constant geometry surround. This combination provides remarkable strength, high efficiency and a peak to peak linear excursion of 21mm.

Magnetic Circuit
The magnetic circuit sports two aluminum shorting rings, double air-gap front plate. The cooling system and the air flow has been designed using modern FEM techniques and further optimized to provide the highest levels of cooling efficiency. The magnetic circuit design is optimized to generate the minimum amount of flux modulation, providing exceptional stability..

Specifications

General Specs

Nominal Diameter 15"

Rated Impedance 8 Ohm

Magnet Neodymium

Basket Material Aluminum

Power Handling

AES Power 800 W

Continuous Power 1600 W

Peak Power 3200 W

Voice Coil

Diameter 101.6 mm

Former Glass Fiber

Winding Height 23 mm

T/S Parameters

Resonant Frequency (Fs) 48.00 Hz

Re 4.70 \u2126

Qes 0.470

Qms 16.50

Qts 0.460

Vas 89.90 liters

Sd 855.30 cm\u00B2

Mms 123.00 grams

Rms 2.25

Cms 0.0900

Bl 19.30 T\u00B7m

Le 0.680 mH

Sensitivity 97.73 dB

Design Details

Surround Material fabric

Cone/Dome Material Paper CF

Spider Nomex

T-Plate 12.5 mm

Xmax (peak) 5.25 mm

Xmech 17.75 mm

Overall Diameter 392.00 mm

Bolt Circle Diameter 373.00 mm

Baffle Cutout Dia. 360.00 mm

Mounting Holes 8

Depth (flange to rear) 149.50 mm

Net Weight 6.65 kg

Ordering Codes

Product Code 15NPMX8-262

Downloads

2D Drawing (PDF) 3D Model (STEP)

Frequency Response & Impedance

2D Drawing

Technical Summary

This design is particularly effective in single or multi-driver bass reflex systems used in professional two-way and multi-way PA systems, powered monitors, and compact bass-reflex enclosures, where extended bandwidth, controlled distortion across the full operating range, and versatile system integration are required.

Enclosure Recommendations

ENCLOSURE RECOMMENDATIONS: 15NPMX8-262
Driver: 15NPMX8-262 (15NPM) — 15" Mid-Woofer
Key T/S: Fs=48.0Hz, Qts=0.46, Vas=89.9L, Sens=97.73dB
Power: AES 800W / Cont 1600W / Peak 3200W
Xmax=5.25mm, Sd=855.3cm², Bl=19.3T·m
RECOMMENDED ENCLOSURE TYPE: Bass Reflex (Vented)
PORT RECOMMENDATION: Round port (100mm diameter) — compact cabinet may benefit from precision-tuned cylindrical port
  a) High SPL
     Net Volume: 50 liters
     Tuning (Fb): 55 Hz
     Est. -3dB: 51 Hz
     HP Filter: 47 Hz (24dB/oct recommended)
     Round Port: 100mm dia × 74mm long
     Slot Port: 288mm W × 60mm H × 214mm L
     Port Velocity: 19.8 m/s
     Notes: Strong mid-bass impact, reduced cone excursion, maximum output
  b) Balanced Response
     Net Volume: 60 liters
     Tuning (Fb): 50 Hz
     Est. -3dB: 46 Hz
     HP Filter: 40 Hz (24dB/oct recommended)
     Round Port: 100mm dia × 76mm long
     Slot Port: 288mm W × 60mm H × 221mm L
     Port Velocity: 18.1 m/s
     Notes: General-purpose PA/subwoofer, even response, good transient behavior
  c) Extended Low Frequency
     Net Volume: 75 liters
     Tuning (Fb): 46 Hz
     Est. -3dB: 39 Hz
     HP Filter: 34 Hz (24dB/oct recommended)
     Round Port: 100mm dia × 82mm long
     Slot Port: 288mm W × 60mm H × 232mm L
     Port Velocity: 16.4 m/s
     Notes: Deep bass extension, requires proper system protection below tuning
--- Summary ---
The 15NPMX8-262 is a 15-inch high-output mid-woofer driver designed for professional 2-way and multi-way systems requiring high sensitivity (98 dB 1W/1m) and controlled low-frequency behavior. The driver features a compliant suspension design suited to moderate-volume enclosures with extended low-frequency response.
In bass reflex enclosures, the driver performs best in net internal volumes of 50 to 75 liters, tuned between 46 and 55 Hz. This alignment provides a balanced combination of low-frequency extension, cone control around resonance, and efficient port loading. Lower tuning improves deep bass extension but increases excursion below tuning, requiring appropriate high-pass filtering. Higher tuning increases sensitivity and output in the upper bass region while improving mechanical control.
The driver is intended for use with high-power amplification (approx. 800 W AES / 1600 W continuous) and DSP control. A high-pass filter in the range of 34–47 Hz is recommended depending on enclosure tuning, along with proper limiting to manage thermal and mechanical stress. Typical operating bandwidth is 39–1500 Hz, covering bass through upper-mid frequencies for direct integration with a compression driver or tweeter in a two-way or multi-way system.

Frequently Asked Questions

- EXTENDED FREQUENCY RESPONSE
- 2 demodulation rings, lightweight carbon fiber loaded paper cone
- Hi BL, Double air-gap, powerful motor structure

ENCLOSURE RECOMMENDATIONS: 15NPMX8-262
Driver: 15NPMX8-262 (15NPM) — 15" Mid-Woofer
Key T/S: Fs=48.0Hz, Qts=0.46, Vas=89.9L, Sens=97.73dB
Power: AES 800W / Cont 1600W / Peak 3200W
Xmax=5.25mm, Sd=855.3cm², Bl=19.3T·m
RECOMMENDED ENCLOSURE TYPE: Bass Reflex (Vented)
PORT RECOMMENDATION: Round port (100mm diameter) — compact cabinet may benefit from precision-tuned cylindrical port
  a) High SPL
     Net Volume: 50 liters
     Tuning (Fb): 55 Hz
     Est. -3dB: 51 Hz
     HP Filter: 47 Hz (24dB/oct recommended)
     Round Port: 100mm dia × 74mm long
     Slot Port: 288mm W × 60mm H × 214mm L
     Port Velocity: 19.8 m/s
     Notes: Strong mid-bass impact, reduced cone excursion, maximum output
  b) Balanced Response
     Net Volume: 60 liters
     Tuning (Fb): 50 Hz
     Est. -3dB: 46 Hz
     HP Filter: 40 Hz (24dB/oct recommended)
     Round Port: 100mm dia × 76mm long
     Slot Port: 288mm W × 60mm H × 221mm L
     Port Velocity: 18.1 m/s
     Notes: General-purpose PA/subwoofer, even response, good transient behavior
  c) Extended Low Frequency
     Net Volume: 75 liters
     Tuning (Fb): 46 Hz
     Est. -3dB: 39 Hz
     HP Filter: 34 Hz (24dB/oct recommended)
     Round Port: 100mm dia × 82mm long
     Slot Port: 288mm W × 60mm H × 232mm L
     Port Velocity: 16.4 m/s
     Notes: Deep bass extension, requires proper system protection below tuning
--- Summary ---
The 15NPMX8-262 is a 15-inch high-output mid-woofer driver designed for professional 2-way and multi-way systems...

This design is particularly effective in single or multi-driver bass reflex systems used in professional two-way and multi-way PA systems, powered monitors, and compact bass-reflex enclosures, where extended bandwidth, controlled distortion across the full operating range, and versatile system integration are required.

AES Power: 800 W, Continuous: 1600 W, Peak: 3200 W. Sensitivity: 97.73 dB (1W/1m).

15NPM

Key Features

Quick Specs