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  • HIFI stereo Shuguang 12AX7 12AU7 JJ ECC83S home sound speaker Tube preamplifier Upgrade Marantz7 circuit
  • HIFI stereo Shuguang 12AX7 12AU7 JJ ECC83S home sound speaker Tube preamplifier Upgrade Marantz7 circuit
  • HIFI stereo Shuguang 12AX7 12AU7 JJ ECC83S home sound speaker Tube preamplifier Upgrade Marantz7 circuit
  • HIFI stereo Shuguang 12AX7 12AU7 JJ ECC83S home sound speaker Tube preamplifier Upgrade Marantz7 circuit
  • HIFI stereo Shuguang 12AX7 12AU7 JJ ECC83S home sound speaker Tube preamplifier Upgrade Marantz7 circuit
  • HIFI stereo Shuguang 12AX7 12AU7 JJ ECC83S home sound speaker Tube preamplifier Upgrade Marantz7 circuit
  • HIFI stereo Shuguang 12AX7 12AU7 JJ ECC83S home sound speaker Tube preamplifier Upgrade Marantz7 circuit
1/1
  • HIFI stereo Shuguang 12AX7 12AU7 JJ ECC83S home sound speaker Tube preamplifier Upgrade Marantz7 circuit
  • HIFI stereo Shuguang 12AX7 12AU7 JJ ECC83S home sound speaker Tube preamplifier Upgrade Marantz7 circuit
  • HIFI stereo Shuguang 12AX7 12AU7 JJ ECC83S home sound speaker Tube preamplifier Upgrade Marantz7 circuit
  • HIFI stereo Shuguang 12AX7 12AU7 JJ ECC83S home sound speaker Tube preamplifier Upgrade Marantz7 circuit
  • HIFI stereo Shuguang 12AX7 12AU7 JJ ECC83S home sound speaker Tube preamplifier Upgrade Marantz7 circuit
  • HIFI stereo Shuguang 12AX7 12AU7 JJ ECC83S home sound speaker Tube preamplifier Upgrade Marantz7 circuit
  • HIFI stereo Shuguang 12AX7 12AU7 JJ ECC83S home sound speaker Tube preamplifier Upgrade Marantz7 circuit

HIFI stereo Shuguang 12AX7 12AU7 JJ ECC83S home sound speaker Tube preamplifier Upgrade Marantz7 circuit

SKU:
12AX7 12AU7 JJ ECC83S Tube preamplifier
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  • voltage:
    AC 115V Input voltage ShuangGuang tube
    AC 1230V Input voltage ShuangGuang tube
    AC 115V Input voltage JJ tube
    AC 230V Input voltage JJ tube
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  • HIFI stereo Shuguang 12AX7 12AU7 JJ ECC83S home sound speaker Tube preamplifier Upgrade Marantz7 circuit
  • HIFI stereo Shuguang 12AX7 12AU7 JJ ECC83S home sound speaker Tube preamplifier Upgrade Marantz7 circuit
  • HIFI stereo Shuguang 12AX7 12AU7 JJ ECC83S home sound speaker Tube preamplifier Upgrade Marantz7 circuit
  • HIFI stereo Shuguang 12AX7 12AU7 JJ ECC83S home sound speaker Tube preamplifier Upgrade Marantz7 circuit
  • HIFI stereo Shuguang 12AX7 12AU7 JJ ECC83S home sound speaker Tube preamplifier Upgrade Marantz7 circuit
  • HIFI stereo Shuguang 12AX7 12AU7 JJ ECC83S home sound speaker Tube preamplifier Upgrade Marantz7 circuit
  • HIFI stereo Shuguang 12AX7 12AU7 JJ ECC83S home sound speaker Tube preamplifier Upgrade Marantz7 circuit
  • HIFI stereo Shuguang 12AX7 12AU7 JJ ECC83S home sound speaker Tube preamplifier Upgrade Marantz7 circuit
  • HIFI stereo Shuguang 12AX7 12AU7 JJ ECC83S home sound speaker Tube preamplifier Upgrade Marantz7 circuit
  • HIFI stereo Shuguang 12AX7 12AU7 JJ ECC83S home sound speaker Tube preamplifier Upgrade Marantz7 circuit
  • HIFI stereo Shuguang 12AX7 12AU7 JJ ECC83S home sound speaker Tube preamplifier Upgrade Marantz7 circuit
  • HIFI stereo Shuguang 12AX7 12AU7 JJ ECC83S home sound speaker Tube preamplifier Upgrade Marantz7 circuit
  • HIFI stereo Shuguang 12AX7 12AU7 JJ ECC83S home sound speaker Tube preamplifier Upgrade Marantz7 circuit
  • HIFI stereo Shuguang 12AX7 12AU7 JJ ECC83S home sound speaker Tube preamplifier Upgrade Marantz7 circuit
1/1
  • HIFI stereo Shuguang 12AX7 12AU7 JJ ECC83S home sound speaker Tube preamplifier Upgrade Marantz7 circuit
  • HIFI stereo Shuguang 12AX7 12AU7 JJ ECC83S home sound speaker Tube preamplifier Upgrade Marantz7 circuit
  • HIFI stereo Shuguang 12AX7 12AU7 JJ ECC83S home sound speaker Tube preamplifier Upgrade Marantz7 circuit
  • HIFI stereo Shuguang 12AX7 12AU7 JJ ECC83S home sound speaker Tube preamplifier Upgrade Marantz7 circuit
  • HIFI stereo Shuguang 12AX7 12AU7 JJ ECC83S home sound speaker Tube preamplifier Upgrade Marantz7 circuit
  • HIFI stereo Shuguang 12AX7 12AU7 JJ ECC83S home sound speaker Tube preamplifier Upgrade Marantz7 circuit
  • HIFI stereo Shuguang 12AX7 12AU7 JJ ECC83S home sound speaker Tube preamplifier Upgrade Marantz7 circuit
  • Description
Product details:

In response to some shortcomings of the Marantz7 circuit, the Japanese have made improvements. The main feature of the improved circuit is to replace the cathode follower of the Marantz7 circuit with an SRPP circuit. Since the SRPP output stage does not have any voltage amplification effect, it is only used as a buffer stage. Compared with ordinary cathode output devices, its driving load capacity is stronger. In terms of sound quality, it maintains the sweet and mellow characteristics of the Marantz7 circuit's mid frequency, Its analytical power and high-frequency and low-frequency response are better than Marantz7, with a higher signal-to-noise ratio

Materials:

Non break point A-core transformer, pure copper transformer
US CMC 24K gold-plated RCA.
Japanese ALPS 16 potentiometer.
All high-grade aluminum alloy chassis.
With the highest class of philips, WIMA High voltage capacitor.
Resistance are catch DALE resistance of the United States and Japan KOA series.


Parameters:

Tube: 12AU7*2 12AX7*2 6Z2 (Q aviation class)*2

Frequency response: 20HZ-30KHZ

Input sensitivity: 300MV

Signal to noise ratio: 98DB

External dimensions: W232 * H84（Excluding transformer cover） * D300  mm

Weight: 4Kg

Packing List:

Tube preamp*1
power cable*1

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BRZhifiaudio e-commerce Co., Ltd address： A3, 9th Road, Zone B, Qixing Industrial Zone, Luocun, Shishan Town, Nanhai District, Foshan,GuangDong，China
19157426618
BRZhifiaudio@outlook.com
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