- Very good performance in mid frequencies
- Compact design that delivers very high performance
- High power handling
- 61NPM was developed for all applications where compact and lightweight t mid-woofer is required. The driver delivers very good performance in mid-frequencies, with a good extension into the low frequencies. Neodymium based magnetic circuit
- was optimized to deliver the highest level of performance. Lightweight paper cone with glass fibers is attached to “M” roll fabric surround. It provides great combination that delivers very good performance across wide range of frequencies. Our
- newly designed basket was structurally reinforced and supports the magnetic structure with ease. Furthermore, the driver sports front and rear gaskets, thus you can mount it into the baffle as front or rear mount.
General specs Nominal Diameter: 6.5 in. Rated Impedance: 8 Ohm Power handling AES Power: 100 Watts Program Power: 200 Watts Voice Coil Diameter: 1.5 in. Winding wire: Copper Former: kapton Winding height: 10.6 mm T/S Parameters Resonant frequency: 92 Hz Re: 5.2 ohm Qes: 0.38 Qms: 5.6 Qts: 0.36 Vas: 7 liters Sd: 143.1 cm2 Mms: 12.3 grams Bl: 9.8 Le: 0.37 mH Sensitivity: 95.44 dB Design details Surround Material: Fabric Cone material: Paper Spider: Nomex Plate thickness: 6 mm Peak to peak linear cone Displacement 10.4 mm Overall diameter: 167 mm Bolt circle diameter: 155 mm Baffle cutout dia.: 145.9 mm Number of mounting holes: 4 Depth (flange to rear): 61.5 mm Net weight: 0.8 kg Ordering codes: 8 ohm version: 61NPMX8-466A Recone kits: Download: Spec download 2D drawing 3D model
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PRODUCT CODE: 61NPMX8-466A
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--- ENCLOSURE RECOMMENDATIONS ---
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ENCLOSURE RECOMMENDATIONS: 61NPMX8-466A
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Driver: 61NPMX8-466A (61NPM) — 6" Mid-Woofer
Key T/S: Fs=92.0Hz, Qts=0.36, Vas=7.0L, Sens=95.44dB
Power: AES 100W / Cont 200W / Peak 400W
Xmax=2.30mm, Sd=143.1cm², Bl=9.8T·m
RECOMMENDED ENCLOSURE TYPE: Bass Reflex (Vented)
PORT RECOMMENDATION: Round port (50mm diameter) — adequate for compact enclosures with lower air volume velocity
a) High SPL
Net Volume: 6 liters
Tuning (Fb): 106 Hz
Est. -3dB: 98 Hz
HP Filter: 98 Hz (24dB/oct recommended)
Round Port: 50mm dia × 61mm long
Slot Port: 117mm W × 40mm H × 177mm L
Port Velocity: 11.1 m/s
Notes: Strong mid-bass impact, reduced cone excursion, maximum output
b) Balanced Response
Net Volume: 8 liters
Tuning (Fb): 85 Hz
Est. -3dB: 72 Hz
HP Filter: 75 Hz (24dB/oct recommended)
Round Port: 50mm dia × 69mm long
Slot Port: 117mm W × 40mm H × 196mm L
Port Velocity: 8.9 m/s
Notes: General-purpose PA/subwoofer, even response, good transient behavior
c) Extended Low Frequency
Net Volume: 10 liters
Tuning (Fb): 71 Hz
Est. -3dB: 60 Hz
HP Filter: 59 Hz (24dB/oct recommended)
Round Port: 50mm dia × 80mm long
Slot Port: 117mm W × 40mm H × 221mm L
Port Velocity: 7.5 m/s
Notes: Deep bass extension, requires proper system protection below tuning
--- Summary ---
The 61NPMX8-466A is a 6-inch mid-woofer driver designed for professional 2-way and multi-way systems requiring high sensitivity (95 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 6 to 10 liters, tuned between 71 and 106 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 moderate amplification (approx. 100 W AES / 200 W continuous) and DSP control. A high-pass filter in the range of 59–98 Hz is recommended depending on enclosure tuning, along with proper limiting to manage thermal and mechanical stress. Typical operating bandwidth is 60–2500 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.
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