![]() However, the second loudspeaker adds considerable depth and projection, and on a big stage where it can be wound up properly, the Neptune’s relatively low output is ideally suited for players who like to drive everything from their guitar.Īs USA-assembled amps go, the price is about right, but bear in mind the Neptune is all about vintage appeal, with no modern features such as effects loops or built-in attenuators. ![]() Both reverb and tremolo can be foot-switched if needed.īig 2x12 combos aren’t for everyone: they’re often unwieldy, heavy brutes that demand an extra degree of dedication if you’re responsible for your own carriage. We’ve heard better spring reverbs from Supro in the past, so maybe this was a one-off. The reverb on this sample was less inspiring, with a pronounced cyclical fluctuation that makes it sound more like a short delay with the feedback control turned up, rather than a splashy cavern. The Neptune’s built-in tremolo sounds excellent, with a good range of speed and depth control. Indeed, the Neptune’s medium-gain preamp makes it an ideal partner for effects, although everything has to go in through the guitar input as there’s no built-in effects loop. Alternatively, any decent stompbox will do the trick. Low-output single coils have a nice crunchy clarity however, you need a good beefy humbucker if you want to drive the Neptune hard. With no preamp gain, the amount of drive you can get depends on how high up you turn the volume control and what kind of guitar you use. Turn the volume up and things get progressively raunchier, with Supro’s characteristic edgy overdrive balanced by a punchy midrange producing a great classic rock lead/rhythm crunch. The tone controls interact smoothly and it’s easy to dial in any guitar adding a little more treble for humbuckers is all that’s needed to retain a nice even balance. The Neptune has no preamp gain control, so most of the amp’s overdrive effects come from turning it up.Īt lower volume settings, the Neptune produces fat ‘blackface’-inspired cleans with lots of headroom. We tried out the Neptune with a variety of single-coil and humbucking guitars, including a Strat with Duncan Alnico Pros and a PAF-equipped Les Paul Standard. The Neptune’s control panel is very easy to navigate it’s a straightforward single-channel affair with a single input jack and knobs for volume, treble, bass, reverb level, tremolo speed and depth. Also inside the cabinet is a long pan reverb spring, which is valve powered, along with the amp’s vintage tremolo effect. The 6973 looks similar to an EL84, but isn’t interchangeable because the pin connections are different. Here's the place you can go to ask tube amplifier questions. There are hundreds of pages of Tube amp information on my library page. The Neptune uses a pair of 6973 output valves, a type more commonly found in vintage jukeboxes but also used on some early Supros and considered to be a key part of the vintage Supro sound. Click the link above for Tube amp info, Schematics, Board building information, Projects, Mods, Transformer diagrams, Photo's, Sound clips. Component quality is good, with metal film resistors to keep hiss levels down and neat, tidy wiring.
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