The Adcom GFA-555 stereo power amplifier has a long history. The original version was introduced in March, 1985. Designed by Nelson Pass, the amplifier weighed 30 pounds and cost about $680. The newer SE version is a redesigned amplifier that weighs 36 pounds and carries a list price of $1299. Adcom retained the styling of the original model, so look closely and you will see “model GFA-555se” above the power switch on the front panel.

Aurorasound is a company in Yokohama, Japan. Designer Shinobu Karaki has 28 years’ experience working for Texas Instruments Japan, Inc. He is also a passionate musician, music teacher and a long-time audiophile. His love of music, combined with trained ears and extensive know-how in electronics and integrated circuits makes Mr. Karaki well suited for designing high-end audio components.

The new Valvet E2 SE single-ended Class A solid-state amplifier is a revelation. Coming to market about a year after my review of the Valvet E2, the SE version exceeds the E2's audible performance in every parameter. Please see the older review for context. The special edition SE version takes all the E2's excellent performance and offers improvements in every area.