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HP 300 SE

Owner's Manual

English

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Summary of Contents for HP 300 SE

Page 1: ...HP 300 SE Owner s Manual English ...

Page 2: ...ic circuit designs has not done the technology any favors Today s loudspeakers and source equipment provide better performance than ever before but also present greater demands on amplifiers Modern sound reproduction equipment delivers a level of performance at a price that simply would not have been possible 20 or even 10 years ago These advances have been achieved through the application of cutt...

Page 3: ...4 ...

Page 4: ... 4 Operation Front panel 11 5 Connections Rear panel 13 6 External power supply 14 7 Advanced function The bypass mode 15 8 Remote control for volume 17 9 Tubes 18 9 1 Tube layout 18 9 2 Replacing tubes 19 9 3 Tube service life 19 10 Option Phono MM MC 20 10 1 The role of the Phono preamplifier 20 10 2 The Phono section of the HP 300 SE 20 10 3 Guidelines for connecting to the Phono section 20 10 ...

Page 5: ...nagement Power supply and other functions Amplifier Sound Quality OCTAVE amplifiers are equipped with a proprietary control and monitoring system we call Power Management This is an electronic brain within the amp that regulates and controls all of the amplifier s functions It includes the Soft Start Electronics that gently ramp up the heating and supply voltages to save wear and tear on the compo...

Page 6: ...king conditions with low noise high speed electronic voltage regulators On the other hand the built in control logic guarantees highest reliability and achieves with soft start techniques the theoretically maximal possible lifetime of the tubes up to approximately 10 Years or more An additional function of the power supply is the protection circuit which releases the output of the HP 300 SE by a r...

Page 7: ...ications to OCTAVE equipment are carried out only by a qualified technician Fuses should also only be changed by a qualified technician Always replace fuses with ones of the same type and rating If your amplifier requires servicing please ship or take your equipment directly to OCTAVE or to one of our authorized service centers Explanation of the warning symbols The exclamation point within an equ...

Page 8: ...t it may be in direct sunlight Do not operate the unit near flammable materials gases or vapours Avoid areas where there may be heavy accumulations of dust or where the unit may be subject to mechanical vibration Place your OCTAVE amplifier on a stable even surface 2 Cover Never operate the amplifier without the cover 3 Ventilation Make sure that your amplifier has a good flow of air around it If ...

Page 9: ...he Power supply with the HP 300 SE 6 Check that the volume control is not set at maximum before playing music through the amplifier and the function switch is in the Position Gain Low med or High 7 Switch on the mains power the rocker switch is located on the top of the external power supply 8 Switch on the other components The preamplifier needs approx 2 4 minutes warm up time During the warm up ...

Page 10: ...eristics of the other components The switching to another position with the Mode switch is always activating the Muting function for approx 30 seconds This is to avoid click noise caused by the Gain changeover of the tube circuit Bypass Home Theatre In this position the Gain of the Line Stage is set to one and the Volume regulator is bypassed See chapter 6 Volume Control Remote control receiver To...

Page 11: ... of your turntable See chap 10 2 Guidelines for connecting to the Phono section Phono RCA line level Input With the option Phono this is the Phono Input Tuner RCA line level Input for any line level playback unit AUX RCA line Input for Video TV or alternatively as a second function the RCA Bypass input Monitor Output RCA line level Output unregulated Buffered Output to allow the connection of a re...

Page 12: ... noise and ground hum loops In position I this two ground lines are connected together with a resistance of 3 3 Ohm In position 0 the connection has a resistance of 2 2 Meg Ohm this resistance is necessary to avoid high electrostatic voltages Balanced Outputs Output for balanced amplifiers PIN assignment PIN 1 Ground PIN 2 Plus PIN 3 Minus Model identification plate Labeled with the serial no and ...

Page 13: ...14 6 External Power Supply Power Supply front Mains power switch I On Control LED Power Supply rear panel Mains Input IEC receptacle Serial number and mains voltage Connecting cable with plug connector ...

Page 14: ...e used for the front main channels The problem of double volume regulation is eliminated How it works Connect the front right and left channels to the Aux L R inputs of the HP 300 SE The signal on the inputs Aux Front L R can be monitored in the classical two channel way using the volume regulation of the HP 300 SE in the Gain Low Med or High position of the Mode Switch Note In the bypass position...

Page 15: ...The bypass mode In the multi channel mode the volume of the multi channel system has to be adjusted at the multi channel source eg the DVD player TV etc In the bypass mode the volume control of the HP300SE is out of function ...

Page 16: ...e inserting the new batteries If it still happens that the remote control does not work after changing the batteries remove the new batteries and wait for the minimum of 2 hours After 2 hours you can insert the new batteries again and the remote control should work 3 Mount the bottom plate again tighten the screws not too hard Please don t trash the old batteries Batteries must be disposed of as s...

Page 17: ... the power cord from the mains power inlet Tubes used also available under this description Line board ECC 81 E 81 CC ECC 801 S 12 AT 7 6N6 6 DJ 8 E 88 CC 6922 ECC 88 Phono MC Board ECC 81 E 81 CC ECC 801 S 12 AT 7 12 AT 7 WA 6072 The phono board is not mounted in Line Versions ...

Page 18: ...ng tips Cleaning agents and contact cleaners are not recommended for tube sockets Clean dirty sockets with compressed air and carefully clean tarnished tube pins using a wire brush 6 Please note No adjustments are necessary to your amplifier after fitting new tubes It may take new tubes some time up to 300 hours to achieve their optimum sound quality Manufacturing faults in tubes may only become e...

Page 19: ...ce moving coil cartridges Most preamps have problems with such cartridges since both gain and input impedance issues have to be addressed simultaneously We have developed an MC Head amp that successfully eliminates the problem areas At the heart of the equalizer is a tube circuit containing 1 tube and two integrated circuits It incorporates a switchable subsonic filter which prevents very low freq...

Page 20: ...static speakers should be protected against such low frequencies in general because the bandwidth of the input transformer of a wide band electrostatic speaker is normally limited to approximately 20Hz The low frequency signals can be reduced with the Subsonic Filter The cut off frequency of this Filter is 15 Hz 3 dB Delivery State Subsonic Filter ON B Gain Setting The gain switch allows you to ma...

Page 21: ...6 1 3 on 90 5 7 on 90 7 2 3 on 76 6 7 on 76 8 4 on 75 8 on 75 9 1 2 3 on 71 5 6 7 on 71 10 1 4 on 69 5 8 on 69 11 2 4 on 61 6 8 on 61 12 1 2 4 on 57 5 6 8 on 57 13 3 4 on 44 7 8 on 44 14 1 3 4 on 42 5 7 8 on 42 15 2 3 4 on 39 6 7 8 on 39 16 all on 37 all on 37 The input impedance setting is important in achieving a balanced sound from your pickup You will find the recommended impedance in the spec...

Page 22: ...solution is to use a single power socket board for your entire system and to use a different power outlet in your listening room Channels are not balanced Check that the RCA plugs are a tight fit Bend the outer ground contact inwards slightly if necessary Sometimes the internal pin in a RCA plug may not be a tight enough fit in which case you should change either the interconnect or the socket 1 D...

Page 23: ...onse Gain med RCA 10 Hz 200 kHz 0 25 dB Frequency response Gain low RCA 10 Hz 200 kHz 1 5 dB Total harmonic distortion Gain Low Med High 0 005 0 007 0 003 at 3V 7 5 kOhm Channel separation 90 dB 1 kHz Crosstalk rejection between inputs 100 dB 1 kHz Input impedance 100 kOhm Channel tracking of volume control 0 5 dB 70 dB Phono MC RIAA equalization accuracy 0 3 dB 15 Hz 20 kHz Subsonic filter corner...

Page 24: ...25 12 TECHNICAL DATA AND DIMENSIONS Preamplifier HP 300 SE Power Supply 390 mm ...

Page 25: ... Harmonic Distortion Line Stage Overall distortion THD noise of the line stage from 20 Hz to 200 kHz Distortion remains low up to 20 kHz Frequency response accuracy of line stages in Gain Low Med and High In the frequency response of 20 Hz 200 kH ...

Page 26: ... line stage 5 V output at 1 kHz The low level of harmonic distortion and low noise level are clearly visible There are no hum components at 50 Hz and 100 Hz Phono RIAA Equalization Graph Frequency response of the phono stage with and without subsonic filter ...

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Page 28: ...ctave de We reserve the right to alter and improve the specifications in pursuit of better OCTAVE logo is a registered trade mark of Andreas Hofmann Copyright by Andreas Hofmann Reproduction in whole or part is prohibited edited ...

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