{"id":331302,"date":"2026-09-07T06:51:17","date_gmt":"2026-09-07T06:51:17","guid":{"rendered":"https:\/\/www.ecoustics.com\/products\/orchard-audio-starkrimson-ht-ultra-gan-amplifier\/"},"modified":"2026-09-08T00:25:38","modified_gmt":"2026-09-08T00:25:38","slug":"orchard-audio-starkrimson-ht-ultra-gan-amplifier","status":"publish","type":"post","link":"https:\/\/www.ecoustics.com\/products\/orchard-audio-starkrimson-ht-ultra-gan-amplifier\/","title":{"rendered":"Orchard Audio Starkrimson HT Ultra Takes GaN Class D Into Home Theater With Up to 500W Per Channel"},"content":{"rendered":"\n

Class D amplification has spent the better part of two decades trying to convince audiophiles that small, efficient and cool-running are not synonyms for cheap, sterile and disposable.<\/p>\n\n\n\n

We have covered that evolution rather extensively at eCoustics, including the rise of Hypex, Purifi and GaN-based designs that have made some of the old complaints about Class D sound increasingly like arguments over whether CDs can ever replace cassettes.<\/p>\n\n\n\n

Orchard Audio<\/strong> has been part of that conversation for years with its Starkrimson amplifiers. Now the New Jersey manufacturer is moving the technology into home theater with the Starkrimson HT Ultra Series<\/strong>, available in three, four and five-channel configurations.<\/p>\n\n\n\n

The last part is relevant because this is not our first encounter with Orchard Audio in a theater system. At Capital Audiofest 2025, we heard an SVS 5.2.4 system powered by Orchard amplification and came away impressed by its dynamics, control and value. The HT Ultra simply turns that concept into a purpose-built product rather than an audiophile science project involving a small mountain of separate amplifiers.<\/p>\n\n\n\n

Related<\/strong>: Fear And Loathing In Class D Amplifiers: What $130 To $50K Actually Buys<\/a><\/p>\n\n\n\n

\"orchard-audio-starkrimson-ht-ultra-inside\"<\/figure>\n\n\n\n

What Exactly Is GaN?<\/h2>\n\n\n\n

GaN stands for gallium nitride, a wide-bandgap semiconductor material used here in place of the silicon MOSFETs found in most Class D amplifiers.<\/p>\n\n\n\n

GaN transistors can switch faster with lower switching losses than conventional silicon devices. That does not automatically make every GaN amplifier sound better; circuit topology, feedback, power supply, PCB layout and output filtering still matter enormously, but it gives designers considerably more room to work at higher switching frequencies while controlling heat and efficiency.<\/p>\n\n\n\n

Orchard\u2019s Starkrimson Ultra circuitry switches at approximately 800kHz, which the company says is three to four times faster than traditional silicon-based Class D designs. Its modulation is performed entirely in the analog domain, using Orchard founder Leo Ayzenshtat\u2019s proprietary DC-coupled, fully balanced dual-feedback modulator and bridged GaN output stages.<\/p>\n\n\n\n

And no, the \u201cD\u201d in Class D still does not mean digital. We have been over this.<\/p>\n\n\n\n

The Power Supplies Are the More Interesting Part<\/h2>\n\n\n\n

The HT Ultra uses Orchard\u2019s Starkrimson Ultra 500W amplifier modules and 1200W power supplies, but buyers can determine how those resources are distributed.<\/p>\n\n\n\n

The five-channel model can be configured with one, three or five 1200W supplies. The four-channel version offers one, three or four, while the three-channel model uses one shared supply. Higher-performance configurations add 43,600\u00b5F capacitor boards to channels that receive dedicated supplies.<\/p>\n\n\n\n

That allows someone building a hybrid music\/home-theater system, for example, to give the front left and right channels dedicated power supplies and capacitor reserves while the center and surrounds share another supply.<\/p>\n\n\n\n

That is considerably more interesting than simply putting five identical amplifier modules in a box and hoping nobody asks what happens when all of them get hungry at once.<\/p>\n\n\n\n

\"orchard-audio-starkrimson-ht-ultra-rear\"<\/figure>\n\n\n\n

Starkrimson HT Ultra Specifications:<\/h3>\n\n\n\n