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RCF

RCF LF21X451 21" Low Frequency Woofer

$849.00
SKU:
LF21X451
Width:
22.99 (in)
Height:
23.78 (in)
Depth:
11.18 (in)
Shipping:
Free Shipping
Current Stock:

Description

The LF21X451 low frequency transducer is the result of many years of R&D developments with the goal of creating new levels of professional audio performance standards. This products features advancements and improvements in all the key areas of transducer technology. Incredibly linear frequency response characteristics, the highest power handling of any comparable transducer, the lowest power compression. The LF21X451 features a fibre loaded cone assembly along with a high excursion triple roll, constant geometry surround: this combination provides remarkable strength and a peak to peak maximum excursion of 54 mm. The new dual forced hyper-venting system guarantee a very efficient voice coil ventilation for minimum power compression and incredible power handling.

Features

  • 4,5 - inch fiberglass Inside/Outside copper voice coil
  • 4000 Watt continuous program power handling
  • 97 dB Sensitivity
  • 28 Hz - 1 kHz Frequency range
  • Dual-forced air ventilation for minimum power compression
  • Dual spider designed with silicon based damping control
  • BL of 30.5 Txm to provide a faster and accurate low frequency

Why We Like This

It combines high power handling with controlled excursion and efficient cooling for consistent low-frequency performance.

FAQs

Q: What type of applications is this woofer suitable for?
It is designed for professional audio systems requiring strong and accurate low-frequency output.

Q: How does it handle heat and power compression?
The dual forced-air ventilation system improves cooling and reduces power compression.

Q: What is the frequency range?
28 Hz to 1 kHz.

Based in Chicago, IL, Gear Club Direct supports audio professionals with reliable components for high-performance sound systems.

Tech Specs

Nominal Diameter:
21 inch / 533 mm
Rated Impedance:
8 ohm
Program Power (watt):
4000 W
Power handling capacity:
2000 W
Sensitivity:
97.0 dB
Frequency range:
28 - 1000 Hz
Effective piston diameter:
470 mm / 18.5 inch
Max. Excursion Before Damage:
54 mm / 2.13 inch
Minimum Impedance (ohm):
6.7 ohm
Voice Coil Diameter:
4.5 inch / 114 mm
Voice Coil Winding Material:
Copper
Voice Coil Length:
34 mm / 1.34 inch
Number of layers:
2
Kind of layers:
inside/outside
Top Plate Thickness:
15 mm / 0.59 inch
Cone Design:
Curved
Surround Material:
Polycotton
Surround Design:
Triple roll
Magnets:
Ceramic
Dual-force air ventilation:
Yes
Spider:
03

Delivery & Returns

At Gear Club Direct, we want you to be happy with your purchase. We understand that there are times when once a product is received, it may not be what you needed or wanted after all. So, we will gladly accept your qualifying return within 15 days of the delivery date. After 15 days of the delivery date, all sales are final. 

 

The Return Process
Customers are required to obtain a Pre-Authorization to return any product. To submit a request for a return, simply log in to your account and request a return and one of our sales representatives will contact you within 24-48 business hours. If you do not have an account with us, please open a help ticket, providing as much detail as possible and whether you are requesting a refund or an exchange.  READ MORE