61FHM 61FHM
LF Mid-Woofer 6"

61FHM

Code: 61FHMX8-430A

Mid-Woofer/6.5inch/Ferrite/Aluminium/60W/8ohm

Key Features

  • EXTENDED FREQUENCY RESPONSE
  • Hard anodized aluminum cone, aluminum basket
  • Designed for hi-fi and outdoor applications

Quick Specs

Impedance

8 Ω

Program Power

120 W

Sensitivity

87.77 dB

Fs

37.00 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.

Specifications

General Specs

Nominal Diameter 6"
Rated Impedance 8 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 17.6 mm

T/S Parameters

Resonant Frequency (Fs) 37.00 Hz
Re 5.80 \u2126
Qes 0.520
Qms 11.01
Qts 0.490
Vas 28.20 liters
Sd 132.70 cm\u00B2
Mms 16.40 grams
Rms 0.35
Cms 1.1300
Bl 6.60 T\u00B7m
Le 0.400 mH
Sensitivity 87.77 dB

Design Details

Surround Material NBR
Cone/Dome Material Aluminum
Spider Nomex
T-Plate 5 mm
Xmax (peak) 6.3 mm
Xmech 11.3 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 61FHMX8-430A

Frequency Response & Impedance

Frequency response of 61FHM

2D Drawing

2D drawing of 61FHM

Enclosure Recommendations

Recommended enclosure alignments (bass reflex):
- 8 liters tuned to 43 Hz: high output, strong mid-bass, reduced excursion; -3 dB approx. 40 Hz, HP filter 35 Hz
- 10 liters tuned to 39 Hz: balanced response, general-purpose (recommended); -3 dB approx. 36 Hz, HP filter 29 Hz
- 10 liters tuned to 35 Hz: extended low-frequency, requires HP filter protection; -3 dB approx. 30 Hz, HP filter 23 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 43 Hz: high output, strong mid-bass, reduced excursion; -3 dB approx. 40 Hz, HP filter 35 Hz
- 10 liters tuned to 39 Hz: balanced response, general-purpose (recommended); -3 dB approx. 36 Hz, HP filter 29 Hz
- 10 liters tuned to 35 Hz: extended low-frequency, requires HP filter protection; -3 dB approx. 30 Hz, HP filter 23 Hz
Compact 2-way pa top or hi-fi mid-woofer
AES Power: 60 W, Continuous: 120 W, Peak: 240 W. Sensitivity: 87.77 dB (1W/1m).

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