Whirlwind UT-20581-1 user manual

Summary of the content on the page No. 1

Whirlwind AS8X4

The AS8X4 Active Splitter is a 1 rack space, 8-channel active microphone splitter
providing 4 isolated outputs per channel. It features:

• Professional quality mic preamps driving premium quality Lundahl LL1581XL
transformers. This eliminates microphone loading effects characteristic of passive
splitters
• 4 transformer isolated outputs optimized for transmitting audio down long cables
• All I/O connections via plug-in Phoenix style screw type terminal strips
• 48-

Summary of the content on the page No. 2

After the 20dB pad, the signal is amplified 20, 30, or 40dBm by the microphone preamp. This low noise preamp provides 20dB of gain and adds only a few dB of noise. When used with the 20dB pad for unity gain, the unit generates 116dB maximum signal to noise ratio. Therefore, with 20dB of headroom the AS8X4 provides 96dBm “working” signal to noise ratio. Following the microphone preamp, the signal is distributed to 4 sections - Iso1/2 driver, Iso3/4 driver, headroom circuit, and cue buss

Summary of the content on the page No. 3

The rear panel contains: • 5 terminal strips - Direct IN/OUT and Iso 1-4. Each of the wire end screw type terminals handles 4 channels • Individual ground lift switches for every Iso output on the unit • A 9-pin DSUB connector that connects the monitor unit and supplies DC power to the AS8X4 As8x4 MONITOR UNIT The monitor unit is available with various wattage power supplies depending on the number of channels needed in the system. The units are available in 2 configurations, ra