LF
Mid-Woofer
12"
123NPM
Code: DR-12-021-8R-B2-C0001
Mid-Woofer/12inch/Neo/Paper/800W/8ohm
Key Features
- High sensitivity, EXTENDED FREQUENCY RESPONSE
- 3 demodulation rings, powerful motor structure, dual air-gap
- High power handling
Quick Specs
Impedance
8 Ω
Program Power
1600 W
Sensitivity
95.82 dB
Fs
58.00 Hz
Magnet
Neodymium
Voice Coil
101.6 mm
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.
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
DR-12-021-8R-B2-C0001
Downloads
Frequency Response & Impedance
2D Drawing
Technical 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.
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.
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.
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.
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.
Recommended enclosure volumes are simulated results. For best enclosure volumes and tuning, we recommend secondary simulation and careful evaluation. Several rounds of samples and fine-tuning may be required for optimal results.
Enclosure Recommendations
Recommended enclosure alignments (bass reflex): - 20 liters tuned to 67 Hz: high output, strong mid-bass, reduced excursion; -3 dB approx. 62 Hz, HP filter 59 Hz - 25 liters tuned to 61 Hz: balanced response, general-purpose (recommended); -3 dB approx. 56 Hz, HP filter 51 Hz - 30 liters tuned to 55 Hz: extended low-frequency, requires HP filter protection; -3 dB approx. 47 Hz, HP filter 43 Hz
Frequently Asked Questions
- - High sensitivity, EXTENDED FREQUENCY RESPONSE
- - 3 demodulation rings, powerful motor structure, dual air-gap
- - High power handling
Recommended enclosure alignments (bass reflex): - 20 liters tuned to 67 Hz: high output, strong mid-bass, reduced excursion; -3 dB approx. 62 Hz, HP filter 59 Hz - 25 liters tuned to 61 Hz: balanced response, general-purpose (recommended); -3 dB approx. 56 Hz, HP filter 51 Hz - 30 liters tuned to 55 Hz: extended low-frequency, requires HP filter protection; -3 dB approx. 47 Hz, HP filter 43 Hz
Vented pa bass-mid or 2-way pa cabinet; weight-critical installs
AES Power: 800 W,
Continuous: 1600 W,
Peak: 3200 W.
Sensitivity: 95.82 dB (1W/1m).
