LF
Mid-Woofer
6"
61FHM
Code: DR-6-004-4R-B2-C0001
Mid-Woofer/6.5inch/Ferrite/Aluminium/60W/4ohm
Key Features
- EXTENDED FREQUENCY RESPONSE
- Hard anodized aluminum cone, aluminum basket
- Designed for hi-fi and outdoor applications
Quick Specs
Impedance
4 Ω
Program Power
120 W
Sensitivity
86.01 dB
Fs
35.00 Hz
Magnet
Ferrite
Voice Coil
38 mm
Design Notes
61FHM mid-woofer was designed for outdoor applications, yet it will shine in hi-fi home and studio applications as well.
Optimized ferrite based magnetic circuit with good air-venting features ensures long lasting performance.
Our engineers have chosen hard-anodized cone with rubber surround for this model. Both of these components are produced with UV stabilizers. Furthermore, REDCATT state of the art adhesives and dispensing techniques ensures waterproof seals in all weather exposed glue joints. Sealing to the exposure can be guaranteed by EVA gaskets or based upon a request by Form In Place Gaskets.
The audio system designers can rest assured we have extensively tested this product with UV exposure, salt exposure and waterproofing.
The extended mid-frequency response allows the systems to be used with higher resonance frequency HF units. For the best performance in the audio systems, we recommend usage in sealed enclosures. In this model the aluminum cone further improves the mid-frequency response and lowers the harmonic distortion artifacts.
Optimized ferrite based magnetic circuit with good air-venting features ensures long lasting performance.
Our engineers have chosen hard-anodized cone with rubber surround for this model. Both of these components are produced with UV stabilizers. Furthermore, REDCATT state of the art adhesives and dispensing techniques ensures waterproof seals in all weather exposed glue joints. Sealing to the exposure can be guaranteed by EVA gaskets or based upon a request by Form In Place Gaskets.
The audio system designers can rest assured we have extensively tested this product with UV exposure, salt exposure and waterproofing.
The extended mid-frequency response allows the systems to be used with higher resonance frequency HF units. For the best performance in the audio systems, we recommend usage in sealed enclosures. In this model the aluminum cone further improves the mid-frequency response and lowers the harmonic distortion artifacts.
Specifications
General Specs
Nominal Diameter
6"
Rated Impedance
4 Ohm
Magnet
Ferrite
Basket Material
Aluminum
Power Handling
AES Power
60 W
Continuous Power
120 W
Peak Power
240 W
Voice Coil
Diameter
38 mm
Winding Wire
CCAW
Former
Glass Fiber
Winding Height
17.8 mm
T/S Parameters
Resonant Frequency (Fs)
35.00 Hz
Re
3.40 \u2126
Qes
0.550
Qms
14.70
Qts
0.530
Vas
28.60 liters
Sd
132.70 cm\u00B2
Mms
18.40 grams
Rms
0.23
Cms
1.1300
Bl
5.01 T\u00B7m
Le
0.100 mH
Sensitivity
86.01 dB
Design Details
Surround Material
NBR
Cone/Dome Material
Aluminum
Spider
Nomex
T-Plate
5 mm
Xmax (peak)
6.4 mm
Xmech
11.4 mm
Overall Diameter
181.50 mm
Bolt Circle Diameter
169.50 mm
Baffle Cutout Dia.
151.00 mm
Mounting Holes
6
Depth (flange to rear)
78.60 mm
Net Weight
1.61 kg
Ordering Codes
Product Code
DR-6-004-4R-B2-C0001
Downloads
Frequency Response & Impedance
2D Drawing
Technical Summary
The 61FHMX4-430C is a 6-inch mid-woofer driver designed for hi-fi subwoofer systems, home theater, in-wall and under-seat installations, and similar domestic or automotive applications. It operates at 86.0 dB sensitivity (1W/1m). The driver features a compliant suspension design suited to moderate-volume enclosures with extended low-frequency response.
The driver is intended for use with moderate amplification (approx. 60 W AES / 120 W continuous) and DSP control. A high-pass filter in the range of 21-32 Hz is recommended depending on enclosure tuning, along with proper limiting to manage thermal and mechanical stress. Typical operating bandwidth is 28-100 Hz, suitable for integration with a mid-bass or full-range driver in a two-way system.
This design is particularly effective in single or multi-driver bass reflex systems used in hi-fi two-way and compact speaker systems, home theater, in-wall and in-ceiling installations, and automotive applications, where extended low-frequency response, wide operating bandwidth, and compact form factor are the primary design priorities.
The driver is intended for use with moderate amplification (approx. 60 W AES / 120 W continuous) and DSP control. A high-pass filter in the range of 21-32 Hz is recommended depending on enclosure tuning, along with proper limiting to manage thermal and mechanical stress. Typical operating bandwidth is 28-100 Hz, suitable for integration with a mid-bass or full-range driver in a two-way system.
This design is particularly effective in single or multi-driver bass reflex systems used in hi-fi two-way and compact speaker systems, home theater, in-wall and in-ceiling installations, and automotive applications, where extended low-frequency response, wide operating bandwidth, and compact form factor are the primary design priorities.
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): - 8 liters tuned to 40 Hz: high output, strong mid-bass, reduced excursion; -3 dB approx. 37 Hz, HP filter 32 Hz - 10 liters tuned to 37 Hz: balanced response, general-purpose (recommended); -3 dB approx. 34 Hz, HP filter 27 Hz - 10 liters tuned to 33 Hz: extended low-frequency, requires HP filter protection; -3 dB approx. 28 Hz, HP filter 21 Hz
Frequently Asked Questions
- - EXTENDED FREQUENCY RESPONSE
- - Hard anodized aluminum cone, aluminum basket
- - Designed for hi-fi and outdoor applications
Recommended enclosure alignments (bass reflex): - 8 liters tuned to 40 Hz: high output, strong mid-bass, reduced excursion; -3 dB approx. 37 Hz, HP filter 32 Hz - 10 liters tuned to 37 Hz: balanced response, general-purpose (recommended); -3 dB approx. 34 Hz, HP filter 27 Hz - 10 liters tuned to 33 Hz: extended low-frequency, requires HP filter protection; -3 dB approx. 28 Hz, HP filter 21 Hz
Compact 2-way pa top or hi-fi mid-woofer
AES Power: 60 W,
Continuous: 120 W,
Peak: 240 W.
Sensitivity: 86.01 dB (1W/1m).
