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OCTAVE HP300 MKII/Silver ( silver favorably ) hybrid vacuum tube preamplifier octave HP300L/S

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$ 6,448.72 (¥ 723,600)
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OCTAVE HP300MK2

By tube line stage parts and
Comprising a semiconductor output buffer parts
Hybrid vacuum tube preamp
HP300MK II delivers superior hybrid configuration allows for various load drive power. In the buffer by using high-current output device (BUF634). Vacuum tube circuits are divided into two parts, Dan ECC802 and form a high-impedance input stage drives buffer using ECC88 (6922) next steps. Systems are over the NFB.
This machine can be two gain settings (low gain: 12.5 dB, gain high: 17.5 dB). XLR outputs are output through the semiconductor inversion amplifier device. Balanced output is always a signal level of + 6 dB for RCA output.
A possible high-current output buffer of the in actual output impedance HP300MK II is very low. Balanced output stage AC-coupling is DC coupled, RCA output stage. カップリングコンデンサ RCA output is 15 µ F.
Built in phono stage as well as technology. RIAA amp Center may 1 book (ECC81) vacuum tubes. The MC input stage uses a special low noise ICS (LT 1115).
Formed in the vacuum tube EQ, the output stage is due to the FET input IC (OPA604). Available all necessary setting MC phono circuit asked this three-stage design. MC input impedance can be adjusted in the selectable gain, subsonic filter features. All the internal supply voltage is stabilized in each place. New power supply corresponds to the voltage fluctuations of a wider range, less vulnerable to adverse effects on sound quality due to contamination of the power supply. But the degree of improvement depends on the commercial power and environment, as well as on the measurement value hearing on revolutionized the good results. Also, output hum and noise has been reduced to the theoretical value limit.

The line amp General characteristics]
■ use vacuum tube Line:ECC 802 JJ, 6922 Phono:ECC 81 ( 5751or6072 )
■ residual noise gain high/30 µ V below
gain low/10 V or less
■ input resistance unbalance: 100 k Ω
Balance:5.6k Ω
■ output resistance unbalance: 56 Ω
Balance: 2 x 22 Ω
■ crosstalk output LR between:-80dB/1kHz ( input open 100 Ω end )
Input terminals:-90dB/1kHz ( input open 100 Ω end )
■ gain ( high ) 17.5 dB
■ gain ( low ) 12.5 dB
■ frequency characteristics 3Hz-300kHz/-1.5dB
■ total harmonic wave distortion 0.001%(3V/7.5kOhm )
■ less than 0.001% total harmonic distortion (RCA output) and normal-98 dB (3 Vrms)
■ SN ratio gain high /-92 dB
low gain /-100 dB
■ input impedance 100 k Ω
■ output impedance 100 k Ω (exitor unbalanced)
2 × 100 Ω (balance)
■ channel tracking 0.5 dB / 70 dB
■ pin assignment-balanced output Pin 01: ground
PIN 02: + (hot)
PIN 03:-(cold)
The MC phono section.
■ RIAA equalization deviation ± 0.3 dB ( 15Hz-20kHz )
■ subsonic filter characteristics 20 Hz /-3 dB ( 12db Oct. )

■ input impedance 16 stages can be set between 30-1000 Ω
■ input sensitivity 0.1 mV
■ gain ( high ) 71 dB
■ gain ( low ) 80 dB
■ signal to noise ratio-75 dB
[General]
■ output terminals XLR×1, RCA×2 (to bypass mode when the XLR and RCA2 input signal through on output that is)
■ input terminal RCA×4 ( フォノモデル are MC (RCA) x 1, RCA×3 )
XLR×1, tape (RCA) x 1
■ power consumption 25 W
■ weight 9 kg
■ standard accessories AC power cord, remote control
■ size 435 W x 65 H x 390 Dmm
■ tax included price ( フォノモデル ) ¥ 840, 000 (price incl. tax)
■ finish black ( HP300P/BK )
Silver ( HP300P/S )
■ tax included price ( linkmodel ) \672, 000 (price incl. tax)
■ finish black ( HP300L/BK )
Silver ( HP300L/S )

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