Description
London Power offers the feature-packed, all-tube Power Scaling power amplifier for use in your pro or home recording studio: the STUDIO-3D with tube-driven reverb.
Note that the photos here are of the previous models which had horizontal tubes sticking out the back. The chassis has been redesigned with a rear step allowing the tubes to be fully external and vertical. The front panel Input jack has been replaced by the 3D control. All of the other controls and features are identical. New pics soon.
Note also that KC-25 has been discontinued.
In the past, we offered STUDIO with and without reverb, as 0-10W in its original form, as 0-50W in later forms. We settled at a sweet spot with 0-25W incorporating London Power‘s proprietary and legendary push-pull reverb driver. A full-length custom delay line works into our unique recovery path providing warm, articulate ambience – hence 3D – even with saturated distortion sounds. Traditional tube reverbs get muddy with distortion sounds.
• Power Scaled 0-25W output
• STUDIO-3D uses any octal-based tube: 6V6, 6L6, 5881, 6550, EL-34, KT-66/77/88
• uses any 12A_7 tubes: 12AT7, 12AU7, 12AY7, 12AX7, ECC-81-/82/-83
• operate single-ended (SE) or push-pull (PP)
• either tube in cathode or fixed bias
• either tube in triode, ultralinear or pentode mode
• direct-impedance jacks for 4,8,16 ohms
• switched ‘Match’ speaker output
• pedal-friendly
• full-length custom reverb tank
• proprietary push-pull reverb driver
• 2U, 6.1kg, 17″W x 3.3″H x 10.5″ D
• 120V, 240V range switch
• rack-mountable with optional kit
• rubber foot storage on rear panel when rack mounted
Download the Studio-KC25-Manual-for-web (123 kB PDF)
STUDIO is the world’s first production guitar amp with Power Scaling. This proprietary technology allows players to use output stage compression and distortion effects within the Human Scale of loudness. Since its introduction in 1995, STUDIO has been in a class of its own – truly unique – with a range of tonal expression far beyond traditional tube amps. It can use all the common octal-based power tubes in singles, in pairs and in mixed pairs.
STUDIO-3D combine a sophisticated power section with an equally sophisticated front-end. The input stage has true variable gain, and accommodates any signal amplitude with as pristine or warm a result as the player desires. Equalisation is distributed throughout the circuit, offering a much wider range of tone than that found in traditional guitar power amps. The touch responsiveness of the amp is affected by these and other controls, such as Vibe, and by the choice of tubes used.
STUDIO-3D can be used as a stand-alone guitar amp with effects pedals in front. You will hear exactly what the pedals do and exactly what the instrument does with them. STUDIO-3D‘s input stage has far more headroom than that of a standard guitar amp, so over-driving the first stage grid is not possible, and thus grid-blocking distortion is avoided. The very low noise, high-quality components and careful circuit design make STUDIO a “tone microscope”.
Each power tube has its own bias switch for cathode biasing or fixed biasing and can be operated in triode, pentode or ultralinear mode. Both tubes can be set the same way or quite differently – one cathode biased and the other fixed biased, for example. Cathode bias is set here to maximize tonal difference at the expense of output power. Each power tube also has its own Level control, allowing either to be dialed out leaving the single-ended tone of the other tube. Bias pots and meter jacks are on the rear panel, accessible from the outside of the amp.
STUDIO-3D accepts any of the pin-compatible octal-based power tubes singly, in pairs or in mixed pairs. Use any of: 6V6, 6L6, 5881, 6550, EL-34, E34L, KT-66, KT-77, KT-88, or any equivalents.
Yes – you can use a single power tube in STUDIO-3D!
Power Scaling allows tube compression and distortion effects at any loudness down to a whisper. The standard loudness range is “unusably loud down to unusably quiet,” so the player or sound engineer can decide how quiet “quiet” is. The 25W maximum output is loud enough to damage hearing when used with typical high-efficiency guitar speakers, but Power Scaling lets you have “cranked” tone at safe sound pressure levels.
Specs & details:
STUDIO-3D incorporate all of London Power’s standard design and construction features:
• toroidal power and output transformers
• fusing for all power transformer windings
• worldwide mains compatibility
• Galactic Grounding (learn about this in our book, The Ultimate Tone Vol. 3 – or ask us!)
• active hum filtering
• long-life capacitors low noise metal-film resistors
• metal-oxide and wire-wound power resistors
• zero standby power when switched ‘off’
You can rack mount STUDIO-3D using the optional 2U6-BRKT, sold as pairs.
Comments our awesome customers have shared with us:
“Fantastic tones”
“STUDIO can out-tweed a tweed amp”
“It’s amazing to be able to play really quietly but have this ripping overdrive for my recording.”
“This is a revolutionary product”
“Incredible reverb tone! Notes hang forever.”
Photo Gallery
