Audiophilepure

https://www.hifinews.com/content/krell-illusion-iiksa-i400-prepower-amplifiers

An Ethernet port is provided on the power amp for software updates, but the only means of control from the preamp is via 12V triggers for on/standby. The Illusion II itself has two sets of balanced analogue inputs and three on RCAs, plus two coaxial, optical and one AES/EBU digital input. Outputs are also on XLRs and RCAs, alongside 12V trigger in/outs, and a socket for an external IR receiver should you want to hide the preamp away.

Front panel controls are via traditional ‘pin-head’ pushbuttons, duplicated on the chunky metal remote handset. There’s no volume knob, but the balanced resistor-ladder adjustment has a rather a large number of very fine steps controlled by up/down buttons. This makes for precise if rather slow adjustment, but at least the blue light-bar on the preamp, which initially glows red in standby, flashes to show you that commands are being received and acted upon. There’s a mute button on the remote should you wish for a swifter pause or restoration of output level.

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