My next step is to try a 48V linear power supply and see how it performs, if it does't give more power I will purchase another one to build a mono block set. I am running a pair of Elac's Debut 6.2 (87 dB sensitivity) and they sound great.
The sound signature is delicious, the only drawback is its small power, but found out thanks to James from TungstenAudio and his genius and generosity, that it is possible to hack the ACA and take it to a better level, I followed up his recommendations and wow, more power and even better sound, it reminds me the sound stage of a tube amp, very, very nice. I thought this is definitely something, well, I am a natural maker with very little electronics knowledge and an audiophile newby, so it could be an inexpensive way to begin this journey and it catches me deeply. I started this project being amazed by all the comments and fantastic feedback posted everywhere. I've selected Omega speakers for their ease with flea-watts. I'm so impressed that I'm building a new desktop system around it for my workspace. So, is the Amp Camp Amp any good? Well, there is joy and pride to be found in building the amp yourself, but that only goes so far if it sounds bad or even just disapoointingly fine. This is probably not an amp to leave on all the time. It has that classic slightly warm class-A sound and the heat that comes with it. Another thing to note: this amp runs hot. The biggest issue I noticed, is that during particularly busy sections, the amp couldn't deliver the clean and tight bass that the Sugden can - the ACA bottom-end reaches plenty-deep, but its presentation is more disorganised and smeared. The midrange clarity and soundstage are lovely, really suiting quieter acoustic music. While it lacked the muscularity of a higher-powered amp, it had no problem driving the speakers to ear-splitting levels with real class. It's way better than that, it blew me away.
This being a low power amp, I was happy to be feeding it to very sensitive Klipsch Forte IIIs. Once I'd biased the channels (simple but finicky process) and checked for DC offset (almost negligible at about 3mV), I hooked the amp up to my usual Sugden IA4 running as a preamp. Faults were easy to track down using the diagnostics supplied and first principles. Rest-assured, if you're a reasonably methodical person capable of following basic instructions, you'll be fine. I kitted-up with a basic soldering iron and a decent multimeter and took a deep breath.
I bought this as a fun holiday project, and with appropriate reverence for the talents of Mr Pass, but with none for myself as I'd never soldered before. Parts Kit $129 - Power Supply $49 - Chassis $159 The official V1.8 build guide with new photos, will be released in the coming weeks.Ī Beautiful "Class A" Amplifier Kit Stereo chassis or monoblocks. We are slowly updating the site and build guides with V1.8 information. These changes are shown clearly on the V1.8 build guide temporary page. Please note: The official V1.8 build guide has not yet been released. Please wire your ACA according to the V1.8 wiring diagram. There are some minor but important wiring changes compared to V1.6.
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Rear panel V1.8 connection diagram to match the V1.8 wiring diagram clearly showing how to select all 4 modes (1 stereo, 3 mono) and how to wire inputs and outputs.V1.8 parts kit contains a new rear mode selector switch allowing you to use regular stereo single ended RCA, or switch between.
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