Octave HP 700 SE Tube Preamplifier

The Octave HP 700 SE continues Octave’s tradition of innovation by refining the acclaimed HP 700 into an even more versatile and sonically sophisticated preamplifier. At its core, the SE features a newly optimized Class A output stage, tuned through extensive measurements and listening sessions for greater tonal refinement, particularly in the midrange. Added to this is expanded connectivity: dual parallel XLR outputs alongside RCA outputs now allow for all forms of bi-amping and multi-zone use.

The HP 700 SE employs Octave’s Precision Technology line stage, a tube circuit with extraordinary specifications: bandwidth extending to 1 MHz, output resistance as low as 100 ohms, and distortion of just 0.001%. With selectable output impedance and three gain levels, the preamplifier can be perfectly tailored to any system. Its discrete, feedback-free output stage relieves the tubes of current demands, ensuring pure, uncolored sound.

Power is supplied by a separate, magnetically shielded unit with high-precision, low-noise regulation circuits. This design guarantees stability even under fluctuating mains conditions and enables an exceptionally low noise floor—essential for its phono stage. Octave’s soft-start and control logic technologies extend tube life and ensure long-term reliability, with an expected service life of up to twenty years.

The modular design of the HP 700 SE allows users to adapt the preamp to their needs with optional plug-in input modules, including MC step-up transformers, XLR transformer modules, and advanced phono stages. The phono RIAA stage has been re-engineered for superior signal-to-noise performance, reduced distortion, and expanded bandwidth for highly accurate analog reproduction.

Additional refinement options include a precision tube-based tone control, frequency-compensated balance adjustment, a stepped 47-position attenuator with 0.1 dB precision, and an output selector for multi-zone playback. A home-theater bypass and full remote operation further enhance integration into modern systems.

With its combination of modular flexibility, state-of-the-art precision circuits, and Octave’s signature tube musicality, the HP 700 SE stands as one of the most advanced and customizable preamplifiers available—an uncompromising centerpiece for high-end audio systems.