Audiophilepure

https://www.enjoythemusic.com/superioraudio/equipment/1023/Art_Audio_Opus4_Carissa_Vacuum_Tube_Amplifier_Review.htm

Art Audio’s Opus 4 monoblocks managed to convey an impression to me of nearly as much depth of overall musicality as the 275 Watts of ultra-linear power of my other reference system amp, the CJ Premier 8A. I ultimately decided to keep the Carissa amplifier as part of my system to use with the Quad 57s and as an alternative for the 63s when they are not connected to the big CJ amps. The power, control, and sound along with the lavish and lovely looks of this latest revised Art Audio 18 Watt SET amp as designed by Tom Willis is highly recommended to be seen and heard.

Art Audio’s Carissa vacuum tube stereo amplifier has character, a distinctive beauty, and elegance that it continues to be part of my reference system. If you are looking for an elegant-looking design and musically refined, and lovely sounding amp in a more powerful rating range, then seek out an audition of the Art Audio Opus 4 monoblocks that have a diminutive look and weight yet produce a prodigious, powerful, and excellent quality output. Bravo to both Tom and Scott for their excellence in design, musical listening, and customer support throughout this evaluation period.