Set the AHB2 MODE switches to MONO on both. Left AHB2 M+ to YELLOW of REL sub (left input) Left AHB2 1- to BLACK of REL sub (ground input) Right AHB2 M+ to RED of REL sub (right input) Note: It may be necessary to extend the RED wire if the left and right amplifiers are not stacked. Several of his conference papers have been published in the ARSC Journal. Two Mono AHB2 amplifiers feeding a single REL subwoofer. He is an active member of the Association for Recorded Sound Collections (ARSC) and has been a regular presenter at ARSC conferences. He is the author of more than 280 articles and reviews on both musical and technical subjects. He now works as a volunteer, transferring vintage analog recordings in the Crane archive to digital format. Gary Galo retired in June 2014 after 38 years as an Audio Engineer at the Crane School of Music, SUNY, in Potsdam, NY. (I know I’ve written such things before, but the AHB2 takes it to a new level.)” The Benchmark amplifier lets you penetrate the densest orchestral scores with ease, never offering a hint of congestion. The AHB2 redefines the word “transparency” and will make many competing amplifiers sound veiled and foggy by comparison. Output current is rated at 18 A, per channel, both channels driven (protection shut-down circuitry kicks in above that threshold).Īs Gary Galo writes: “The most immediately striking characteristic of this amplifier is a jaw-dropping level of detail and resolution. The AHB2, with both channels driven, can also deliver 190W / channel into 4 Ω, and 380 W into an 8-Ω operating bridged mono. Given that I too would be testing the Benchmark AHB2 power amplifier with a pair of Revel Ultima2 Salons, John sent me a second AHB2 so that I could mimic the amplification setup of the AXPONA show. The entire package measures 11” × 4” × 9.5” and weighs 12.5 lb. The power output rating of Benchmark’s new stereo power amplifier, belies its size and weight at 100W / channel into 8 Ω.
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