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> HP 300 MK2 (Black)
Preamplifiers are the heart of any system. From the beginning, OCTAVE has developed first-rate separate preamplifiers. The interface between the low level sources such as turntable and the high level/high current output stages is quite complex and there are many considerations to take into account. There are always interactions between the preamp and the other components in the system, thus the power supply of the preamp becomes extremely important.
The HP 300 MKII belongs to a new generation of OCTAVE preamps derived from the experience gained during the development of the Jubilee preamp. The implementation of a Super Gain/ High Current Output Stage technology improves the line amplifier in all aspects, offering extremely low distortion and very low output resistance. Perhaps the most important aspect is that the sound quality of the tube based stage is independent of the output load and the cable capacitance. The power supply is specifically designed for the HP 300 and includes a highly efficient, low magnetic stray-field transformer. The extensive features of the HP 300 MKII make it an ideal preamp for any high-end audio system.
The HP 300 MKII features a total of five single-ended (RCA) inputs, one balanced (XLR) input, while outputs included are one RCA Record output, two pair of RCA and one pair of XLR outputs.
Home Theatre
The Home Theatre pass-through function allows bypassing the AUX input direct to the RCA output, with the signal being converted into the balanced mode and also present on the balanced (XLR) outputs.
Tape Monitor
The Tape Play and Record input section is connected in the classic manner which allows monitoring of the signal, which is recorded at the same time. The Record output is buffered to minimize interaction with any type of recording equipment.
Power Management and Protection System
The preamplifier is equipped with a multistage Turn-On/Soft-Start electronic protection circuit to avoid stress caused by high inrush currents during the turn on phase. The unit powers up in a defined sequence, and during warm-up the output of the HP 300 MKII is shorted to ground. The same occurs when the unit is switched off. This avoids unwanted signals being passed to the power amplifier. The lifetime of the tubes are extended considerably while their sound quality remains stable for many years due to this protective measure.
Optional Phono Stage
The optional internal Phono Stage of the HP 300 MKII is normally set for MC (moving coil) cartridges. The gain of the MC phono board is internally adjustable in two steps. A second selector activates the subsonic filter. Listening to older analogue records is recommended with a subsonic filter to avoid infrasonic signals.
Tube Complement : Line-Stage: ECC 82 and ECC 88; Phono-Stage: ECC 81
Design : Aluminium silver or Aluminium black
Gain High : 17,5 dB = 7,4
Gain Low : 12,5 dB = 4,2
Frequency Response : 1 Hz – 1.5 MHz -3 dB
Total Harmonic Distortion : 0.001% @ 3V / 7.5 kOhm
Signal-to-Noise Ratio : Gain High : - 94 dB
Signal-to-Noise Ratio Gain Low : -100 dB
Left/Right Crosstalk : 65 dB 1 kHz
Input to Input Crosstalk : - 86 dB 10 kHz
Input Impedance : 100 kOhm
Output Impedance : 56 Ohm Cinch; 2 x 22 Ohm XLR
Channel Balance : 0.5 dB - 70 dB
Phono-MC
RIAA-Equalization Accuracy : 0,3 dB 15 Hz - 20 kHz
Corner Frequency Subsonic Filter : 15 Hz / - 3 dB
Input Impedance : 30 - 1000 Ohm
Input Sensitivity : 0.1 mV / 0.5 mV
Gain Low : 71 dB
Gain High : 80 dB
Signal-to-Noise Ratio (weighted) : - 75 dB
Connections
Inputs : 5 x Cinch, 1 x XLR, 1 x Phono Option
Outputs : 2 x Cinch, 1 x XLR, 1 x Rec
Features : HT Bypass, Sym. In and Outputs
Power Consumption : 25 W
Weight : 9 kg
Standard Accessories : Power cord, IR-Remote Control
Dimensions (in mm) : W x H x D = 435 x 65 x 390 mm
Formats
CD Formats : Red Book
Audio Formats : WAV, AIFF, FLAC, ALAC, OGG Vorbis, AAC, Windows Media-formatted content files, MP3
Internet Radio Provider : vTuner
Disc Compatability : CD, CD-R, CD-RW
User Control
Front Panel : Touch-sensitive eject and shutdown mode function
TV Monitor : 4:3 and 16:9 customisable TV interface USB touch screen compatible
Web Interface : PC and Mac internet browser compatible Adobe Flash user interface
AMX Creston : Installer-customisable reference apps available
Handheld : User interface app for iPhone and iPod Touch devices
Streaming and Ripping
USB : Scan and play from FAT and NTFS formatted memory sticks
Network Shares : Scan and play from music stored on a network share
Network Storage : Rip to external network storage for expanded music storage
CD Metadata : AllMusic.com online, FreeDB online and local database
StreamNet : 6 user streams to NaimNet and NetStreams systems
Power
Supply Voltage : 100V-230V; 50 or 60Hz
Dimensions (HxWxD) : 87 x 207 x 314 mm
Weight : 4.2 kg
Supplied with : External power supply
Formats
CD Formats Red Book
Disc Compatability CD, CD-R
User Control
Front Panel Seven button matrix
Handheld R-Com
Power
Power Supply Options 555PS, 2 x 555PS
Upgrades
Power Supply 555 PS
Other NAC 252, 552 PS, NAP 500, 500 PS
Dimensions (HxWxD) 114 x 432 x 314 mm
Weight 20.2 kg
Supplied with Hi-Line, R-Com, Burndy x 2, Remote Control NARCOM 4, Clamp 6
