2025 Tube Power Amplifier of the Year: PrimaLuna EVO 400 Power Amplifier

$4995

PrimaLuna’s most powerful Evolution series amplifier delivers 70Wpc in ultralinear mode with the stock EL34 pentode, and almost 90Wpc with the optional KT150 beam tetrode. If more power is needed, a pair of amps can easily be configured in monoblock operation. The design is quite flexible; at the flick of a bias switch, all the popular beam power tubes can readily be used. A neat and useful convenience is the remote switching capability between ultralinear and triode modes. Generally, triode mode offers a mellower presentation and occasionally better bass-line definition. And there is no need for tedious manual power-tube bias adjustments. PrimaLuna’s Adaptive AutoBias™ circuit monitors and continuously adjusts bias current under dynamic operating conditions. Its inherent tonal character is rather neutral and tends to be shaped by that of the associated preamp. It is capable of excellent imaging and resolution, coupled with exceptional soundstage transparency. In stock form, it delivers the tonal gravitas that the EL34 pentode is famous for, achieving a satisfying big tone presentation. Relative to most vintage tube amps, its superior detail resolution, enhanced dynamic nuances, and ability to peer deeper within the soundstage make for a much more compelling sonic impression. Sonically, the EVO 400 signifies nothing less than a joyous celebration of tube virtues without the genre’s traditional limitations at the frequency extremes. At its asking price, the EVO 400 represents supreme value. (353)