HP 300 SE | |||||||||
The HP 300 SE is a enhanced version of the HP 300 MKII. The HP 300 SE does not replace the HP 300 SE, this model extends our range of Preamps. The HP 300 SE offers more flexibility in the connections and sonic benefits due to some improvements in the Power Supply and the Output stage of the Line Amplifier. The HP 300 SE has two independent XLR Inputs, three RCA Inputs, one Monitor Output, two RCA Outputs and one XLR Output. The Gain is switchable in three steps, this allow to set the optimum Gain and regulation Ratio depending on the efficiency of the Loudspeaker. The new designed Line Amp has a extremely high Signal to Noise Ratio. Noise is not only a characteristic of the tubes, a significant contribution is coming from the mains, respectively the Power supply design of a Preamp. The Power supply of the HP 300 SE consists of the external transformer with optimized isolation characteristic, and the precise ultra low noise Voltage regulators of the main unit. Both systems are match to each and help reducing the Noise of the Lime Amplifier effectively. The Balanced Output is realized with a highly symmetrical Output Transformer. The Transformer offers the possibility to connect or disconnect the Ground connection to the Power Amplifier. The feature helps to reduce disturbing mains induced currents that usually flow in the Ground of the Signal connection. Both Outputs offer very low Output Resistances. Connecting cables up to 5 - 10 meter is without negative influence. A helpful feature in modern Hifi combinations is the Home Theatre Bypass Function. The HP 300 SE offers this feature, with the additional possibility to select the Bypass Input from a RCA Input to a XLR Input. The Monitor Output is buffered and can be used to drive an external headphone Amp, the Analog Input of a Computer or similar. Phono MC is available optional. | |||||||||
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RE 290 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
OCTAVE proudly presents the latest evolution of the successful and enduring RE 280 stereo amplifier. The company’s traditional stereo amplifier design has been produced since 1990, having been updated and improved continuously over the years. This progressive development has brought forth an even further improved variant in the form of the new RE 290 power amplifier – an ideal companion for any and all modern high-performance loudspeakers. The RE 290 based on the stable and reliable electronic circuits of the RE 280 MKII model, while incorporating the benefits of the recently-developed KT120 power tube. The KT120 allows an output power of more than 100 W via two tubes in push-pull mode, while its current capacity is higher compared to the classic KT88 tube designs. Increased stability with difficult, low impedance speakers is achieved through the increased bandwidth and OCTAVE’s specially designed output transformers. Lifelike reproduction of even the most complex orchestral passages in the own home is now possible. The power bandwidth of the RE 290 ranges from 15 Hz to 85 kHz. The noise level (100μV =-106dB) is so low that even with high efficiency speakers there is no audible hum or noise. The power supply functions are controlled by the exclusive OCTAVE power management circuitry. In combination with the highest quality components manufactured in Europe, this results in a finer-sounding and more stable performance over the entire lifetime of the RE 290 (over 15 years expectancy). A certain charm of tube amplifiers is the ability to explore the sonic properties of different tube types. Whether rare NOS models or new tubes such as the KT120, the OCTAVE RE 290 allows the use of various pin-compatible output tubes. In order to allow optimal operation of a diverse range of output tubes of different power classes, a switching circuit is included on the rear panel of the amp. The bias of the output tubes can be fine-tuned in three steps. Other features enhancing ease of use and operation include the ECOmode, the optional connection for the external Black Box or Super Black Box capacitance upgrade modules, as well as switchable RCA and XLR inputs. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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HP 500 SE, the Orchestral |
Our perennial preamplifier, the HP 500, has been around for almost as long as OCTAVE and was in many ways responsible for defining our approach to building amplifiers. For over 20 years, this preamplifier has been the epitome for consistent excellence in sound quality and state-of-the-art tube technology.During this time, it has maintained its market-leading position thanks to regular design updates from OCTAVE. OCTAVE recently developed the SE (Special Edition) version to mark the 25th anniversary of Stereoplay magazine, which first tested the original HP 500 in 1989. The SE brings the HP 500 preamp back to the current state-of-the-art once more. The use of two Siemens D3A (EF 184) pentodes provides the output stage of the HP 500 SE with a significantly greater bandwidth (0.2 Hz to 2.3 MHz, 6 dB). The extremely low cut-off frequency is responsible for the clearer and more tightly defined bass, which provides the foundation for a clean low frequency register and a thrilling midrange performance. OCTAVE has also further refined the outboard power supply. MOSFET transistors regulate the high-voltage supply. Increased reservoir capacity, improved rectification with Schottky diodes, and end-to-end electronic stabilization all ensure a virtually noise-free supply voltage with a noise component of less than 300 µV. These measures contribute to the exceptionally high signal-to-noise ratio of 103dB |
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