What are the key features of the REDCATT 123NPM?

The REDCATT 123NPM features: High sensitivity, EXTENDED FREQUENCY RESPONSE; 3 demodulation rings, powerful motor structure, dual air-gap; High power handling.

What are the power handling and sensitivity specifications of the 123NPM?

The 123NPM has an AES power rating of 800 W, continuous power of 1600 W, peak power of 3200 W, and a sensitivity of 95.82 dB (1W/1m).

What are the Thiele-Small parameters of the 123NPM?

Key T/S parameters: Fs=58.00 Hz, Qts=0.430, Vas=31.60 liters, Sensitivity=95.82 dB, Bl=19.60 T·m, Xmax=5.25 mm. Magnet type: Neodymium.

123NPM - Mid-Woofer - Professional Loudspeaker Engineering

Name: 123NPM
Brand: REDCATT
SKU: 123NPMX8-185

Design Notes

The 123NPM is a truly unique full range woofer. We have designed cutting edge product, using the best avail-able materials and highly optimized design for the best performance in its class. It delivers very high efficiency, (96 dB 1watt / 1 meter), incredibly linear frequency response characteristics with extended HF frequency response, extreme high power handling capability, while generating ultra low harmonic distortion artifacts. The 123NPM 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 features two aluminum shorting rings, double air-gap front plate. The cooling system and the air flow has been designed using the 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 12"

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 TIL

Winding Height 23 mm

T/S Parameters

Resonant Frequency (Fs) 58.00 Hz

Re 4.70 \u2126

Qes 0.450

Qms 12.60

Qts 0.430

Vas 31.60 liters

Sd 551.00 cm\u00B2

Mms 100.00 grams

Rms 2.89

Cms 0.0753

Bl 19.60 T\u00B7m

Le 0.710 mH

Sensitivity 95.82 dB

Design Details

Surround Material fabric

Cone/Dome Material Paper GF

Spider Nomex

T-Plate 12.5 mm

Xmax (peak) 5.25 mm

Xmech 17.75 mm

Overall Diameter 320.35 mm

Bolt Circle Diameter 299.00 mm

Baffle Cutout Dia. 281.90 mm

Mounting Holes 8

Depth (flange to rear) 140.50 mm

Net Weight 6.20 kg

Ordering Codes

Product Code 123NPMX8-185

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: 123NPMX8-185
Driver: 123NPMX8-185 (123NPM) — 12" Mid-Woofer
Key T/S: Fs=58.0Hz, Qts=0.43, Vas=31.6L, Sens=95.82dB
Power: AES 800W / Cont 1600W / Peak 3200W
Xmax=5.25mm, Sd=551.0cm², Bl=19.6T·m
RECOMMENDED ENCLOSURE TYPE: Bass Reflex (Vented)
PORT RECOMMENDATION: Round port (100mm diameter) — standard for mid-size professional enclosures; good balance of area and packaging
  a) High SPL
     Net Volume: 25 liters
     Tuning (Fb): 66 Hz
     Est. -3dB: 61 Hz
     HP Filter: 58 Hz (24dB/oct recommended)
     Round Port: 100mm dia × 145mm long
     Slot Port: 226mm W × 60mm H × 279mm L
     Port Velocity: 15.2 m/s
     Notes: Strong mid-bass impact, reduced cone excursion, maximum output
  b) Balanced Response
     Net Volume: 35 liters
     Tuning (Fb): 55 Hz
     Est. -3dB: 47 Hz
     HP Filter: 45 Hz (24dB/oct recommended)
     Round Port: 100mm dia × 165mm long
     Slot Port: 226mm W × 60mm H × 313mm L
     Port Velocity: 12.6 m/s
     Notes: General-purpose PA/subwoofer, even response, good transient behavior
  c) Extended Low Frequency
     Net Volume: 40 liters
     Tuning (Fb): 47 Hz
     Est. -3dB: 40 Hz
     HP Filter: 35 Hz (24dB/oct recommended)
     Round Port: 100mm dia × 191mm long
     Slot Port: 226mm W × 60mm H × 359mm L
     Port Velocity: 10.9 m/s
     Notes: Deep bass extension, requires proper system protection below tuning
--- Summary ---
The 123NPMX8-185 is a 12-inch mid-woofer driver designed for professional 2-way and multi-way systems requiring high sensitivity (96 dB 1W/1m) and controlled low-frequency behavior. The driver uses a balanced motor-suspension design that provides good cone control while maintaining usable output across its operating bandwidth.
In bass reflex enclosures, the driver performs best in net internal volumes of 25 to 40 liters, tuned between 47 and 66 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 35–58 Hz is recommended depending on enclosure tuning, along with proper limiting to manage thermal and mechanical stress. Typical operating bandwidth is 40–2000 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

- High sensitivity, EXTENDED FREQUENCY RESPONSE
- 3 demodulation rings, powerful motor structure, dual air-gap
- High power handling

ENCLOSURE RECOMMENDATIONS: 123NPMX8-185
Driver: 123NPMX8-185 (123NPM) — 12" Mid-Woofer
Key T/S: Fs=58.0Hz, Qts=0.43, Vas=31.6L, Sens=95.82dB
Power: AES 800W / Cont 1600W / Peak 3200W
Xmax=5.25mm, Sd=551.0cm², Bl=19.6T·m
RECOMMENDED ENCLOSURE TYPE: Bass Reflex (Vented)
PORT RECOMMENDATION: Round port (100mm diameter) — standard for mid-size professional enclosures; good balance of area and packaging
  a) High SPL
     Net Volume: 25 liters
     Tuning (Fb): 66 Hz
     Est. -3dB: 61 Hz
     HP Filter: 58 Hz (24dB/oct recommended)
     Round Port: 100mm dia × 145mm long
     Slot Port: 226mm W × 60mm H × 279mm L
     Port Velocity: 15.2 m/s
     Notes: Strong mid-bass impact, reduced cone excursion, maximum output
  b) Balanced Response
     Net Volume: 35 liters
     Tuning (Fb): 55 Hz
     Est. -3dB: 47 Hz
     HP Filter: 45 Hz (24dB/oct recommended)
     Round Port: 100mm dia × 165mm long
     Slot Port: 226mm W × 60mm H × 313mm L
     Port Velocity: 12.6 m/s
     Notes: General-purpose PA/subwoofer, even response, good transient behavior
  c) Extended Low Frequency
     Net Volume: 40 liters
     Tuning (Fb): 47 Hz
     Est. -3dB: 40 Hz
     HP Filter: 35 Hz (24dB/oct recommended)
     Round Port: 100mm dia × 191mm long
     Slot Port: 226mm W × 60mm H × 359mm L
     Port Velocity: 10.9 m/s
     Notes: Deep bass extension, requires proper system protection below tuning
--- Summary ---
The 123NPMX8-185 is a 12-inch mid-woofer driver designed for professional 2-way and multi-w...

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: 95.82 dB (1W/1m).

123NPM

Key Features

Quick Specs