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High quality PSUs

All too often, cheap switching power supplies are commonplace in consumer audio, leading to a troubling variety of ill effects ranging from audible mains buzz, all the way to damage to the equipment unfortunate enough to be connected up to these cheap and noisy devices. In order to suppress the switching noise to the legally required levels, the output has to be coupled back onto the mains with a small capacitor, injecting mains currents into the audio ground path.

In addition to this, these cheap units mostly use a sub-optimal 'single supply rail' arrangement where the ground which the audio signal is referenced to is injected with the highly non-linear power currents of active amplifying devices which often significantly degrade distortion performance. Sometimes an internal DC to DC converter is used to generate a split supply, but that brings the screeching switching electronics into the enclosure right alongside the sensitive linear audio path.


Split Supply

Bucking the current cost-driven trend, Classic Audio Ltd believes in investing in high quality parts to avoid trouble straight out of the gate. Instead of having a switching supply that injects noise, and makes a prerequisite for a compromised design, Classic Audio uses an old-fashioned low frequency transformer based design that takes the transformer and its troublesome magnetic field out of the enclosure and down to the wall socket.

To ensure the customer gets excellent sound straight away, no products are advertised with optional premium 'upgraded' (read adequate!) parts. All Classic Audio components are optimised as standard, with literally 100 times less capacitative coupling to the mains than other manufactures who offer linear upgrades that only partially improve a design intrinsically compromised for use with switching adapters. That standard means that Classic Audio power supplies are low frequency, linear, split supplies that keep the power currents out of the ground path, just like the one pictured above; a power supply you can truly rely on not to get in the way of the music!

Feedback from a professional sound engineer!

What can I say? The combination of this deck, cartridge and preamp is just outstanding. You can really feel the accuracy, but that detail doesn't detract from the soul, I've now got a real "buzz" after listening to it a few hours. That elation from just listening. I was shifting furniture around in my "Studio 2" with it on, and I just kept stopping in wonder. Like you, I'm an engineer, so steer away from hyperbole, but you've made me a very happy person today.

Alan Sallabank, 8dB Sound Ltd.

Quoted from Facebook messenger with permission!


Spartan 10 phonostage - available to order

With the first batch of 10 units entering into the hands of customers at the beginning of 2022, the Classic Audio Spartan 10 phonostage was tremendously well received by its first users. Not only does the Spartan 10 have a spec that breezily wipes the floor with all other MM stages in its price range and well above, but also features an entirely original design that includes low frequency crossfeed, a mono switch, uncompensated low distortion input amplifiers for 0.0007% THD throughout the audio band, ±0.1dB RIAA accuracy, and an ultra-flat subsonic filter that stops subsonic disturbances from not only getting through to the output, but also from eating into the final headroom of the phonostage.


Spartan 10 phonostage

Spartan 10, second batch model

Classic Audio is currently manufacturing the Spartan 10 continuously and has stock available to order.

Spartan 10s are sold at a price of £350 plus the cost of P&P and a suitable power supply. Buyers can source the latter themselves if they wish to, or Classic Audio Ltd. can provide a UK type PSU at a cost of £20.

Total price including P&P and PSU is £380.


HiFi Pig Logo

Recently the Spartan 10 has garnered a five star review in HiFi Pig magazine.


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