Altec Lansing 421-8HII
A 38 cm cone woofer designed for high-power musical instrument and PA applications
Overview
The Altec Lansing 421-8HII is a 38 cm cone type woofer unit built for durability and high-power handling. Manufactured by Altec Lansing, it was developed specifically for use in musical instrument amplification and found favor in high-power public address (PA) systems due to its ability to withstand large input levels without failure. This driver delivers a frequency response from 35 Hz to 8 kHz with a sensitivity of 101dB measured at one watt per meter.
Specifications
| Driver size | 38 cm |
| Frequency characteristic | 35 Hz to 8 kHz |
| Lowest resonance frequency | 40Hz |
| Impedance | 8 Ω |
| Allowable input | 150W continuous |
| Output sound pressure level | 101dB/W/m |
| Weight | 9.5kg |
Context
Originally developed for musical instruments, the 421-8HII became a preferred choice for high-power PA systems thanks to its robust construction and ability to handle substantial continuous power inputs, making it suitable for demanding live sound environments.
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