Upgrade Product Overview Buy Online at Sale Prices - VKDN

Showing 1–36 of 981 results

FILTER BY CATEGORY:

75% off

ZK-1001U TPA3116D2 Mono 100W Bluetooth 5.3 Amplifier Board 9-24V Boost AUX USB Bass Treble for DIY TWS Speaker

ZK-1001U TPA3116D2 Mono 100W Bluetooth 5.3 Amplifier Board 9-24V Boost AUX USB Bass Treble for DIY TWS Speaker

ZK-1001U TPA3116D2 Mono 100W Bluetooth 5.3 Amplifier Board 9-24V Boost AUX USB Bass Treble for DIY TWS Speaker

$94.19~~$376.78~~

3 sold

50% off

Douk Audio U2 PRO Upgrade Version XMOS XU316 USB Digital Interface DDC Mini S/PDIF Audio Converter

Douk Audio U2 PRO Upgrade Version XMOS XU316 USB Digital Interface DDC Mini S/PDIF Audio Converter

Douk Audio U2 PRO Upgrade Version XMOS XU316 USB Digital Interface DDC Mini S/PDIF Audio Converter

$478.74~~$957.49~~

22 sold

12AX7-25 Vacuum Tube Replace ECC83 7025 6N4 for Tube Amp Preamp Hifi Upgrade Phono Preamp Bluetooth Amplifier

12AX7-25 Vacuum Tube Replace ECC83 7025 6N4 for Tube Amp Preamp Hifi Upgrade Phono Preamp Bluetooth Amplifier

12AX7-25 Vacuum Tube Replace ECC83 7025 6N4 for Tube Amp Preamp Hifi Upgrade Phono Preamp Bluetooth Amplifier

$24.00~~$24.00~~

2 sold

35% off

WE275 PSVANE Electronic Tube 1:1 Complete Reproduction Upgrade 1940s Xidian WE2A3 2A3 Vacuum Tube Original Precision Matching

WE275 PSVANE Electronic Tube 1:1 Complete Reproduction Upgrade 1940s Xidian WE2A3 2A3 Vacuum Tube Original Precision Matching

WE275 PSVANE Electronic Tube 1:1 Complete Reproduction Upgrade 1940s Xidian WE2A3 2A3 Vacuum Tube Original Precision Matching

$154.63~~$237.89~~

1 sold

Aogutx EH 6SN7 Vacuum Tube Upgrade 6H8C 6N8P CV181 6F8G CV1988 for HIFI Audio Valve Electronic Tube Amplifier Kit Match Quad DIY

Aogutx EH 6SN7 Vacuum Tube Upgrade 6H8C 6N8P CV181 6F8G CV1988 for HIFI Audio Valve Electronic Tube Amplifier Kit Match Quad DIY

Aogutx EH 6SN7 Vacuum Tube Upgrade 6H8C 6N8P CV181 6F8G CV1988 for HIFI Audio Valve Electronic Tube Amplifier Kit Match Quad DIY

$735.47~~$735.47~~

1 sold

50% off

Upgraded Version of the Latest Hdtv Indoor and Outdoor Digital Tv Enhanced Dtmb Tv Antenna

Upgraded Version of the Latest Hdtv Indoor and Outdoor Digital Tv Enhanced Dtmb Tv Antenna

Upgraded Version of the Latest Hdtv Indoor and Outdoor Digital Tv Enhanced Dtmb Tv Antenna

$57.29~~$114.58~~

11 sold

30% off

Matched Pair 7-Pin GE JAN 5654W Vacuum Tubes Upgrade for 6AK5/6J1/6Ж1/ EF95/6J1P

Matched Pair 7-Pin GE JAN 5654W Vacuum Tubes Upgrade for 6AK5/6J1/6Ж1/ EF95/6J1P

Matched Pair 7-Pin GE JAN 5654W Vacuum Tubes Upgrade for 6AK5/6J1/6Ж1/ EF95/6J1P

$20.99~~$29.99~~

103 sold

6% off

Free shipping LPS-A6 Upgraded Linear Power Board Special Filtering Module For Eversolo DMP-A6 Data Broadcast

Free shipping LPS-A6 Upgraded Linear Power Board Special Filtering Module For Eversolo DMP-A6 Data Broadcast

Free shipping LPS-A6 Upgraded Linear Power Board Special Filtering Module For Eversolo DMP-A6 Data Broadcast

$858.22~~$913.00~~

2 sold

PSVANE Air Series 5U4G Rectifier Vacuum Tube, Replace 5U4GB 274B 5Z3P, HiFi Audio Tube Amplifier Upgrade Parts

PSVANE Air Series 5U4G Rectifier Vacuum Tube, Replace 5U4GB 274B 5Z3P, HiFi Audio Tube Amplifier Upgrade Parts

PSVANE Air Series 5U4G Rectifier Vacuum Tube, Replace 5U4GB 274B 5Z3P, HiFi Audio Tube Amplifier Upgrade Parts

$64.18~~$64.18~~

2 sold

50% off

YS-HT21 2.1 Channel Digital Audio Amplifier 160Wx2+220W TWS Wireless Bluetooth HiFi Power Amplifier Upgraded High Tone Subwoofer

YS-HT21 2.1 Channel Digital Audio Amplifier 160Wx2+220W TWS Wireless Bluetooth HiFi Power Amplifier Upgraded High Tone Subwoofer

YS-HT21 2.1 Channel Digital Audio Amplifier 160Wx2+220W TWS Wireless Bluetooth HiFi Power Amplifier Upgraded High Tone Subwoofer

$219.00~~$438.00~~

5 sold

ShuGuang 300B-T / Matched Pair / HIFI Upgrade / Vacuum Tube / HIFI Amplifier / Original Box

ShuGuang 300B-T / Matched Pair / HIFI Upgrade / Vacuum Tube / HIFI Amplifier / Original Box

ShuGuang 300B-T / Matched Pair / HIFI Upgrade / Vacuum Tube / HIFI Amplifier / Original Box

$339.99~~$339.99~~

45% off

Upgraded Your Cassette Player with this Long lasting Gear for DCC900 Tape Play

Upgraded Your Cassette Player with this Long lasting Gear for DCC900 Tape Play

Upgraded Your Cassette Player with this Long lasting Gear for DCC900 Tape Play

$18.66~~$33.92~~

Shuguang KT66-Z Vacuum Tube Upgrade 6L6G 6P3P CV321 5881 KT88 EL34 HIFI Audio Valve Electron Tube Amp

Shuguang KT66-Z Vacuum Tube Upgrade 6L6G 6P3P CV321 5881 KT88 EL34 HIFI Audio Valve Electron Tube Amp

Shuguang KT66-Z Vacuum Tube Upgrade 6L6G 6P3P CV321 5881 KT88 EL34 HIFI Audio Valve Electron Tube Amp

$63.90~~$63.90~~

27% off

Upgrade B-063 TPA3255 Parallel High Power Amplifier Board 600W Mono PBTL XH2.54Mm 2PIN Connector-ABFT

Upgrade B-063 TPA3255 Parallel High Power Amplifier Board 600W Mono PBTL XH2.54Mm 2PIN Connector-ABFT

$38.74~~$53.07~~

1 sold

54% off

ThundeaL 4K Android Full HD Projector TD80Pro Mini Beam Projector TD80 Pro 1080P 3D Video Home Theater Projetor TD80W Upgrade

ThundeaL 4K Android Full HD Projector TD80Pro Mini Beam Projector TD80 Pro 1080P 3D Video Home Theater Projetor TD80W Upgrade

ThundeaL 4K Android Full HD Projector TD80Pro Mini Beam Projector TD80 Pro 1080P 3D Video Home Theater Projetor TD80W Upgrade

$789.18~~$1715.61~~

80 sold

81% off

PSVANE EL34PH Vacuum Tube Upgrade EL34C EL34B 6P3P 6CA7 6V6 KT66 UKEL34 HIFI Audio Valve Tube Amplifier Kit DIY Match Quad

PSVANE EL34PH Vacuum Tube Upgrade EL34C EL34B 6P3P 6CA7 6V6 KT66 UKEL34 HIFI Audio Valve Tube Amplifier Kit DIY Match Quad

PSVANE EL34PH Vacuum Tube Upgrade EL34C EL34B 6P3P 6CA7 6V6 KT66 UKEL34 HIFI Audio Valve Tube Amplifier Kit DIY Match Quad

$59.67~~$314.03~~

51 sold

33% off

GE 5654W GE5654 Vacuum Tube Valve Vacuum Electronic Tube Upgrade for 6J1 6m1 6AK5 6J1P EF95 Pairing Audio Amplifiers

GE 5654W GE5654 Vacuum Tube Valve Vacuum Electronic Tube Upgrade for 6J1 6m1 6AK5 6J1P EF95 Pairing Audio Amplifiers

GE 5654W GE5654 Vacuum Tube Valve Vacuum Electronic Tube Upgrade for 6J1 6m1 6AK5 6J1P EF95 Pairing Audio Amplifiers

$13.39~~$19.98~~

4 sold

30% off

Version Upgraded 300W Power Amplifier With Speaker Protection 1943+5200 Hifi High-Power Audio Amplifier Board DC 20V-90V

Version Upgraded 300W Power Amplifier With Speaker Protection 1943+5200 Hifi High-Power Audio Amplifier Board DC 20V-90V

Version Upgraded 300W Power Amplifier With Speaker Protection 1943+5200 Hifi High-Power Audio Amplifier Board DC 20V-90V

$77.38~~$110.55~~

2 sold

60W R-Core Transformer Low Noise Linear Power Supply DC 5V-24V for Home Theater Amplifier HiFi Audio Device Upgrade

60W R-Core Transformer Low Noise Linear Power Supply DC 5V-24V for Home Theater Amplifier HiFi Audio Device Upgrade

60W R-Core Transformer Low Noise Linear Power Supply DC 5V-24V for Home Theater Amplifier HiFi Audio Device Upgrade

$688.04~~$688.04~~

7 sold

37% off

Op amp decoupling base, upgrade base, op amp base

Op amp decoupling base, upgrade base, op amp base

Op amp decoupling base, upgrade base, op amp base

$111.45~~$176.90~~

6 sold

30% off

PUZU PZ-C7 Wiring Harness 4X150W Car DSP Amplifier Car Radio Sound Upgrade Digital Audio Signal Processor For Hyundai Kia

PUZU PZ-C7 Wiring Harness 4X150W Car DSP Amplifier Car Radio Sound Upgrade Digital Audio Signal Processor For Hyundai Kia

PUZU PZ-C7 Wiring Harness 4X150W Car DSP Amplifier Car Radio Sound Upgrade Digital Audio Signal Processor For Hyundai Kia

$922.88~~$1318.40~~

192 sold

Svetlana 6L6GC 6L6 Vacuum Tube Upgrade 6P3P EL34 6L6G 5881 6CA7 HIFI Audio Valve Tube Amplifier Kit DIY Matched Quad Aogutx

Svetlana 6L6GC 6L6 Vacuum Tube Upgrade 6P3P EL34 6L6G 5881 6CA7 HIFI Audio Valve Tube Amplifier Kit DIY Matched Quad Aogutx

Svetlana 6L6GC 6L6 Vacuum Tube Upgrade 6P3P EL34 6L6G 5881 6CA7 HIFI Audio Valve Tube Amplifier Kit DIY Matched Quad Aogutx

$816.32~~$816.32~~

2 sold

14% off

Golden Throat Preamplifier A100 Upgrade High-Definition Amplifier Board Ultimate Flagship Version A100SSPV5

Golden Throat Preamplifier A100 Upgrade High-Definition Amplifier Board Ultimate Flagship Version A100SSPV5

Golden Throat Preamplifier A100 Upgrade High-Definition Amplifier Board Ultimate Flagship Version A100SSPV5

$9.62~~$11.19~~

3 sold

53% off

Shuguang KT100 Vacuum Tube - Compatible with KT88/6550 - High Power Audio Amplifier Upgrade

Shuguang KT100 Vacuum Tube - Compatible with KT88/6550 - High Power Audio Amplifier Upgrade

Shuguang KT100 Vacuum Tube - Compatible with KT88/6550 - High Power Audio Amplifier Upgrade

$37.53~~$79.85~~

6 sold

45% off

LHY Audio 25W Dc12v Low Noise DC Stabilized Linear Power Supply Upgrade HiFi Audio Audio Routing

LHY Audio 25W Dc12v Low Noise DC Stabilized Linear Power Supply Upgrade HiFi Audio Audio Routing

LHY Audio 25W Dc12v Low Noise DC Stabilized Linear Power Supply Upgrade HiFi Audio Audio Routing

$580.66~~$1055.75~~

16 sold

Aogutx PSVAEN Acme 805 A805 Vacuum Tube Upgrade 805A 805AT 805M HIFI Audio Valve Electronic Tube Amplifier Diy Matched Quad

Aogutx PSVAEN Acme 805 A805 Vacuum Tube Upgrade 805A 805AT 805M HIFI Audio Valve Electronic Tube Amplifier Diy Matched Quad

Aogutx PSVAEN Acme 805 A805 Vacuum Tube Upgrade 805A 805AT 805M HIFI Audio Valve Electronic Tube Amplifier Diy Matched Quad

$839.45~~$839.45~~

5 sold

32% off

Operational Amplifier Upgrade Socket

Operational Amplifier Upgrade Socket

Operational Amplifier Upgrade Socket

$178.03~~$261.81~~

3 sold

PSVANE Horizon 12AT7-AT / ECC81 Vacuum Tube Amplifier Upgrade B739 6201 6J8P 6SJ7 EF86 HIFI Audio Valve Electron Tube

PSVANE Horizon 12AT7-AT / ECC81 Vacuum Tube Amplifier Upgrade B739 6201 6J8P 6SJ7 EF86 HIFI Audio Valve Electron Tube

PSVANE Horizon 12AT7-AT / ECC81 Vacuum Tube Amplifier Upgrade B739 6201 6J8P 6SJ7 EF86 HIFI Audio Valve Electron Tube

$233.81~~$233.81~~

23 sold

Shuguang FU-7 807 Vacuum tube Upgrade FU-7 807 Electron tube Amplifeir Kit HIFI Audio Valve DIY Matched

Shuguang FU-7 807 Vacuum tube Upgrade FU-7 807 Electron tube Amplifeir Kit HIFI Audio Valve DIY Matched

Shuguang FU-7 807 Vacuum tube Upgrade FU-7 807 Electron tube Amplifeir Kit HIFI Audio Valve DIY Matched

$42.80~~$42.80~~

68% off

Upgraded 6K4/6A2 Tube Preamplifier Amplifiers HiFi Tube Preamp Bile Buffer Auido Amp Speaker Sound Amplifier Home Theater DIY

Upgraded 6K4/6A2 Tube Preamplifier Amplifiers HiFi Tube Preamp Bile Buffer Auido Amp Speaker Sound Amplifier Home Theater DIY

Upgraded 6K4/6A2 Tube Preamplifier Amplifiers HiFi Tube Preamp Bile Buffer Auido Amp Speaker Sound Amplifier Home Theater DIY

$138.86~~$433.94~~

93 sold

6% off

New Upgrade AMP 2CH TPA3255 MONO Split High power Class D Digital Power Amplifier 300W+300W RCA or XLR Input Version (Optional)

New Upgrade AMP 2CH TPA3255 MONO Split High power Class D Digital Power Amplifier 300W+300W RCA or XLR Input Version (Optional)

New Upgrade AMP 2CH TPA3255 MONO Split High power Class D Digital Power Amplifier 300W+300W RCA or XLR Input Version (Optional)

$747.45~~$795.16~~

5 sold

1% off

6Z5P Electronic Valve Class J Tube Amplifier Rectifier Upgrade 6U5C 6X5G 6X5GT Vacuum Tube Provide Match 2PCS

6Z5P Electronic Valve Class J Tube Amplifier Rectifier Upgrade 6U5C 6X5G 6X5GT Vacuum Tube Provide Match 2PCS

6Z5P Electronic Valve Class J Tube Amplifier Rectifier Upgrade 6U5C 6X5G 6X5GT Vacuum Tube Provide Match 2PCS

$12.56~~$12.69~~

15 sold

AogutxMullard 12AT7 ECC81 Vacuum Tube Upgrade B739 6201 6J8P 6SJ7 EF86 HIFI Audio Valve Electron Tube Amplifier Matched Quad DIY

AogutxMullard 12AT7 ECC81 Vacuum Tube Upgrade B739 6201 6J8P 6SJ7 EF86 HIFI Audio Valve Electron Tube Amplifier Matched Quad DIY

AogutxMullard 12AT7 ECC81 Vacuum Tube Upgrade B739 6201 6J8P 6SJ7 EF86 HIFI Audio Valve Electron Tube Amplifier Matched Quad DIY

$563.37~~$563.37~~

5 sold

45% off

BREEZE 2025New upgrade hifi power amplifier reference inscription Naim NAC52 line balance front power amplifier

BREEZE 2025New upgrade hifi power amplifier reference inscription Naim NAC52 line balance front power amplifier

BREEZE 2025New upgrade hifi power amplifier reference inscription Naim NAC52 line balance front power amplifier

$1944.23~~$3534.96~~

2 sold

29% off

Constant Temperature Crystal Oscillator Divider Board Supports Clock Signal Upgrade for Optical Drives, Network Cards, and More

Constant Temperature Crystal Oscillator Divider Board Supports Clock Signal Upgrade for Optical Drives, Network Cards, and More

Constant Temperature Crystal Oscillator Divider Board Supports Clock Signal Upgrade for Optical Drives, Network Cards, and More

$397.58~~$559.97~~

2 sold

10% off

New upgraded enthusiast EMI filtering purification isolation transformer for AC power supply 30W AC 12V, 16V, 18V, 24V

New upgraded enthusiast EMI filtering purification isolation transformer for AC power supply 30W AC 12V, 16V, 18V, 24V

New upgraded enthusiast EMI filtering purification isolation transformer for AC power supply 30W AC 12V, 16V, 18V, 24V

$52.20~~$58.00~~

75% off

ZK-1001U TPA3116D2 Mono 100W Bluetooth 5.3 Amplifier Board 9-24V Boost AUX USB Bass Treble for DIY TWS Speaker

ZK-1001U TPA3116D2 Mono 100W Bluetooth 5.3 Amplifier Board 9-24V Boost AUX USB Bass Treble for DIY TWS Speaker

ZK-1001U TPA3116D2 Mono 100W Bluetooth 5.3 Amplifier Board 9-24V Boost AUX USB Bass Treble for DIY TWS Speaker

$94.19 $376.78

3 sold

Categories: Consumer Electronics, Home Audio & Video

Buy Now

50% off

Douk Audio U2 PRO Upgrade Version XMOS XU316 USB Digital Interface DDC Mini S/PDIF Audio Converter

Douk Audio U2 PRO Upgrade Version XMOS XU316 USB Digital Interface DDC Mini S/PDIF Audio Converter

Douk Audio U2 PRO Upgrade Version XMOS XU316 USB Digital Interface DDC Mini S/PDIF Audio Converter

$478.74 $957.49

22 sold

Categories: Consumer Electronics, Home Audio & Video

Buy Now

12AX7-25 Vacuum Tube Replace ECC83 7025 6N4 for Tube Amp Preamp Hifi Upgrade Phono Preamp Bluetooth Amplifier

12AX7-25 Vacuum Tube Replace ECC83 7025 6N4 for Tube Amp Preamp Hifi Upgrade Phono Preamp Bluetooth Amplifier

12AX7-25 Vacuum Tube Replace ECC83 7025 6N4 for Tube Amp Preamp Hifi Upgrade Phono Preamp Bluetooth Amplifier

$24.00 $24.00

2 sold

Categories: Consumer Electronics, Home Audio & Video

Buy Now

35% off

WE275 PSVANE Electronic Tube 1:1 Complete Reproduction Upgrade 1940s Xidian WE2A3 2A3 Vacuum Tube Original Precision Matching

WE275 PSVANE Electronic Tube 1:1 Complete Reproduction Upgrade 1940s Xidian WE2A3 2A3 Vacuum Tube Original Precision Matching

WE275 PSVANE Electronic Tube 1:1 Complete Reproduction Upgrade 1940s Xidian WE2A3 2A3 Vacuum Tube Original Precision Matching

$154.63 $237.89

1 sold

Categories: Consumer Electronics, Home Audio & Video

Buy Now

Aogutx EH 6SN7 Vacuum Tube Upgrade 6H8C 6N8P CV181 6F8G CV1988 for HIFI Audio Valve Electronic Tube Amplifier Kit Match Quad DIY

Aogutx EH 6SN7 Vacuum Tube Upgrade 6H8C 6N8P CV181 6F8G CV1988 for HIFI Audio Valve Electronic Tube Amplifier Kit Match Quad DIY

Aogutx EH 6SN7 Vacuum Tube Upgrade 6H8C 6N8P CV181 6F8G CV1988 for HIFI Audio Valve Electronic Tube Amplifier Kit Match Quad DIY

$735.47 $735.47

1 sold

Categories: Consumer Electronics, Home Audio & Video

Buy Now

50% off

Upgraded Version of the Latest Hdtv Indoor and Outdoor Digital Tv Enhanced Dtmb Tv Antenna

Upgraded Version of the Latest Hdtv Indoor and Outdoor Digital Tv Enhanced Dtmb Tv Antenna

Upgraded Version of the Latest Hdtv Indoor and Outdoor Digital Tv Enhanced Dtmb Tv Antenna

$57.29 $114.58

11 sold

Categories: Consumer Electronics, Home Audio & Video

Buy Now

30% off

Matched Pair 7-Pin GE JAN 5654W Vacuum Tubes Upgrade for 6AK5/6J1/6Ж1/ EF95/6J1P

Matched Pair 7-Pin GE JAN 5654W Vacuum Tubes Upgrade for 6AK5/6J1/6Ж1/ EF95/6J1P

Matched Pair 7-Pin GE JAN 5654W Vacuum Tubes Upgrade for 6AK5/6J1/6Ж1/ EF95/6J1P

$20.99 $29.99

103 sold

Categories: Consumer Electronics, Home Audio & Video

Buy Now

6% off

Free shipping LPS-A6 Upgraded Linear Power Board Special Filtering Module For Eversolo DMP-A6 Data Broadcast

Free shipping LPS-A6 Upgraded Linear Power Board Special Filtering Module For Eversolo DMP-A6 Data Broadcast

Free shipping LPS-A6 Upgraded Linear Power Board Special Filtering Module For Eversolo DMP-A6 Data Broadcast

$858.22 $913.00

2 sold

Categories: Consumer Electronics, Home Audio & Video

Buy Now

PSVANE Air Series 5U4G Rectifier Vacuum Tube, Replace 5U4GB 274B 5Z3P, HiFi Audio Tube Amplifier Upgrade Parts

PSVANE Air Series 5U4G Rectifier Vacuum Tube, Replace 5U4GB 274B 5Z3P, HiFi Audio Tube Amplifier Upgrade Parts

PSVANE Air Series 5U4G Rectifier Vacuum Tube, Replace 5U4GB 274B 5Z3P, HiFi Audio Tube Amplifier Upgrade Parts

$64.18 $64.18

2 sold

Categories: Consumer Electronics, Home Audio & Video

Buy Now

50% off

YS-HT21 2.1 Channel Digital Audio Amplifier 160Wx2+220W TWS Wireless Bluetooth HiFi Power Amplifier Upgraded High Tone Subwoofer

YS-HT21 2.1 Channel Digital Audio Amplifier 160Wx2+220W TWS Wireless Bluetooth HiFi Power Amplifier Upgraded High Tone Subwoofer

YS-HT21 2.1 Channel Digital Audio Amplifier 160Wx2+220W TWS Wireless Bluetooth HiFi Power Amplifier Upgraded High Tone Subwoofer

$219.00 $438.00

5 sold

Categories: Consumer Electronics, Home Audio & Video

Buy Now

ShuGuang 300B-T / Matched Pair / HIFI Upgrade / Vacuum Tube / HIFI Amplifier / Original Box

ShuGuang 300B-T / Matched Pair / HIFI Upgrade / Vacuum Tube / HIFI Amplifier / Original Box

ShuGuang 300B-T / Matched Pair / HIFI Upgrade / Vacuum Tube / HIFI Amplifier / Original Box

$339.99 $339.99

Categories: Consumer Electronics, Home Audio & Video

Buy Now

45% off

Upgraded Your Cassette Player with this Long lasting Gear for DCC900 Tape Play

Upgraded Your Cassette Player with this Long lasting Gear for DCC900 Tape Play

Upgraded Your Cassette Player with this Long lasting Gear for DCC900 Tape Play

$18.66 $33.92

Categories: Consumer Electronics, Home Audio & Video

Buy Now

Shuguang KT66-Z Vacuum Tube Upgrade 6L6G 6P3P CV321 5881 KT88 EL34 HIFI Audio Valve Electron Tube Amp

Shuguang KT66-Z Vacuum Tube Upgrade 6L6G 6P3P CV321 5881 KT88 EL34 HIFI Audio Valve Electron Tube Amp

Shuguang KT66-Z Vacuum Tube Upgrade 6L6G 6P3P CV321 5881 KT88 EL34 HIFI Audio Valve Electron Tube Amp

$63.90 $63.90

Categories: Consumer Electronics, Home Audio & Video

Buy Now

27% off

Upgrade B-063 TPA3255 Parallel High Power Amplifier Board 600W Mono PBTL XH2.54Mm 2PIN Connector-ABFT

Upgrade B-063 TPA3255 Parallel High Power Amplifier Board 600W Mono PBTL XH2.54Mm 2PIN Connector-ABFT

$38.74 $53.07

1 sold

Categories: Consumer Electronics, Home Audio & Video

Buy Now

54% off

ThundeaL 4K Android Full HD Projector TD80Pro Mini Beam Projector TD80 Pro 1080P 3D Video Home Theater Projetor TD80W Upgrade

ThundeaL 4K Android Full HD Projector TD80Pro Mini Beam Projector TD80 Pro 1080P 3D Video Home Theater Projetor TD80W Upgrade

ThundeaL 4K Android Full HD Projector TD80Pro Mini Beam Projector TD80 Pro 1080P 3D Video Home Theater Projetor TD80W Upgrade

$789.18 $1715.61

80 sold

Categories: Consumer Electronics, Home Audio & Video

Buy Now

81% off

PSVANE EL34PH Vacuum Tube Upgrade EL34C EL34B 6P3P 6CA7 6V6 KT66 UKEL34 HIFI Audio Valve Tube Amplifier Kit DIY Match Quad

PSVANE EL34PH Vacuum Tube Upgrade EL34C EL34B 6P3P 6CA7 6V6 KT66 UKEL34 HIFI Audio Valve Tube Amplifier Kit DIY Match Quad

PSVANE EL34PH Vacuum Tube Upgrade EL34C EL34B 6P3P 6CA7 6V6 KT66 UKEL34 HIFI Audio Valve Tube Amplifier Kit DIY Match Quad

$59.67 $314.03

51 sold

Categories: Consumer Electronics, Home Audio & Video

Buy Now

33% off

GE 5654W GE5654 Vacuum Tube Valve Vacuum Electronic Tube Upgrade for 6J1 6m1 6AK5 6J1P EF95 Pairing Audio Amplifiers

GE 5654W GE5654 Vacuum Tube Valve Vacuum Electronic Tube Upgrade for 6J1 6m1 6AK5 6J1P EF95 Pairing Audio Amplifiers

GE 5654W GE5654 Vacuum Tube Valve Vacuum Electronic Tube Upgrade for 6J1 6m1 6AK5 6J1P EF95 Pairing Audio Amplifiers

$13.39 $19.98

4 sold

Categories: Consumer Electronics, Home Audio & Video

Buy Now

30% off

Version Upgraded 300W Power Amplifier With Speaker Protection 1943+5200 Hifi High-Power Audio Amplifier Board DC 20V-90V

Version Upgraded 300W Power Amplifier With Speaker Protection 1943+5200 Hifi High-Power Audio Amplifier Board DC 20V-90V

Version Upgraded 300W Power Amplifier With Speaker Protection 1943+5200 Hifi High-Power Audio Amplifier Board DC 20V-90V

$77.38 $110.55

2 sold

Categories: Consumer Electronics, Home Audio & Video

Buy Now

60W R-Core Transformer Low Noise Linear Power Supply DC 5V-24V for Home Theater Amplifier HiFi Audio Device Upgrade

60W R-Core Transformer Low Noise Linear Power Supply DC 5V-24V for Home Theater Amplifier HiFi Audio Device Upgrade

60W R-Core Transformer Low Noise Linear Power Supply DC 5V-24V for Home Theater Amplifier HiFi Audio Device Upgrade

$688.04 $688.04

7 sold

Categories: Consumer Electronics, Home Audio & Video

Buy Now

37% off

Op amp decoupling base, upgrade base, op amp base

Op amp decoupling base, upgrade base, op amp base

Op amp decoupling base, upgrade base, op amp base

$111.45 $176.90

6 sold

Categories: Consumer Electronics, Home Audio & Video

Buy Now

30% off

PUZU PZ-C7 Wiring Harness 4X150W Car DSP Amplifier Car Radio Sound Upgrade Digital Audio Signal Processor For Hyundai Kia

PUZU PZ-C7 Wiring Harness 4X150W Car DSP Amplifier Car Radio Sound Upgrade Digital Audio Signal Processor For Hyundai Kia

PUZU PZ-C7 Wiring Harness 4X150W Car DSP Amplifier Car Radio Sound Upgrade Digital Audio Signal Processor For Hyundai Kia

$922.88 $1318.40

192 sold

Categories: Consumer Electronics, Home Audio & Video

Buy Now

Svetlana 6L6GC 6L6 Vacuum Tube Upgrade 6P3P EL34 6L6G 5881 6CA7 HIFI Audio Valve Tube Amplifier Kit DIY Matched Quad Aogutx

Svetlana 6L6GC 6L6 Vacuum Tube Upgrade 6P3P EL34 6L6G 5881 6CA7 HIFI Audio Valve Tube Amplifier Kit DIY Matched Quad Aogutx

Svetlana 6L6GC 6L6 Vacuum Tube Upgrade 6P3P EL34 6L6G 5881 6CA7 HIFI Audio Valve Tube Amplifier Kit DIY Matched Quad Aogutx

$816.32 $816.32

2 sold

Categories: Consumer Electronics, Home Audio & Video

Buy Now

14% off

Golden Throat Preamplifier A100 Upgrade High-Definition Amplifier Board Ultimate Flagship Version A100SSPV5

Golden Throat Preamplifier A100 Upgrade High-Definition Amplifier Board Ultimate Flagship Version A100SSPV5

Golden Throat Preamplifier A100 Upgrade High-Definition Amplifier Board Ultimate Flagship Version A100SSPV5

$9.62 $11.19

3 sold

Categories: Consumer Electronics, Home Audio & Video

Buy Now

53% off

Shuguang KT100 Vacuum Tube - Compatible with KT88/6550 - High Power Audio Amplifier Upgrade

Shuguang KT100 Vacuum Tube - Compatible with KT88/6550 - High Power Audio Amplifier Upgrade

Shuguang KT100 Vacuum Tube - Compatible with KT88/6550 - High Power Audio Amplifier Upgrade

$37.53 $79.85

6 sold

Categories: Consumer Electronics, Home Audio & Video

Buy Now

45% off

LHY Audio 25W Dc12v Low Noise DC Stabilized Linear Power Supply Upgrade HiFi Audio Audio Routing

LHY Audio 25W Dc12v Low Noise DC Stabilized Linear Power Supply Upgrade HiFi Audio Audio Routing

LHY Audio 25W Dc12v Low Noise DC Stabilized Linear Power Supply Upgrade HiFi Audio Audio Routing

$580.66 $1055.75

16 sold

Categories: Consumer Electronics, Home Audio & Video

Buy Now

Aogutx PSVAEN Acme 805 A805 Vacuum Tube Upgrade 805A 805AT 805M HIFI Audio Valve Electronic Tube Amplifier Diy Matched Quad

Aogutx PSVAEN Acme 805 A805 Vacuum Tube Upgrade 805A 805AT 805M HIFI Audio Valve Electronic Tube Amplifier Diy Matched Quad

Aogutx PSVAEN Acme 805 A805 Vacuum Tube Upgrade 805A 805AT 805M HIFI Audio Valve Electronic Tube Amplifier Diy Matched Quad

$839.45 $839.45

5 sold

Categories: Consumer Electronics, Home Audio & Video

Buy Now

32% off

Operational Amplifier Upgrade Socket

Operational Amplifier Upgrade Socket

Operational Amplifier Upgrade Socket

$178.03 $261.81

3 sold

Categories: Consumer Electronics, Home Audio & Video

Buy Now

PSVANE Horizon 12AT7-AT / ECC81 Vacuum Tube Amplifier Upgrade B739 6201 6J8P 6SJ7 EF86 HIFI Audio Valve Electron Tube

PSVANE Horizon 12AT7-AT / ECC81 Vacuum Tube Amplifier Upgrade B739 6201 6J8P 6SJ7 EF86 HIFI Audio Valve Electron Tube

PSVANE Horizon 12AT7-AT / ECC81 Vacuum Tube Amplifier Upgrade B739 6201 6J8P 6SJ7 EF86 HIFI Audio Valve Electron Tube

$233.81 $233.81

23 sold

Categories: Consumer Electronics, Home Audio & Video

Buy Now

Shuguang FU-7 807 Vacuum tube Upgrade FU-7 807 Electron tube Amplifeir Kit HIFI Audio Valve DIY Matched

Shuguang FU-7 807 Vacuum tube Upgrade FU-7 807 Electron tube Amplifeir Kit HIFI Audio Valve DIY Matched

Shuguang FU-7 807 Vacuum tube Upgrade FU-7 807 Electron tube Amplifeir Kit HIFI Audio Valve DIY Matched

$42.80 $42.80

Categories: Consumer Electronics, Home Audio & Video

Buy Now

68% off

Upgraded 6K4/6A2 Tube Preamplifier Amplifiers HiFi Tube Preamp Bile Buffer Auido Amp Speaker Sound Amplifier Home Theater DIY

Upgraded 6K4/6A2 Tube Preamplifier Amplifiers HiFi Tube Preamp Bile Buffer Auido Amp Speaker Sound Amplifier Home Theater DIY

Upgraded 6K4/6A2 Tube Preamplifier Amplifiers HiFi Tube Preamp Bile Buffer Auido Amp Speaker Sound Amplifier Home Theater DIY

$138.86 $433.94

93 sold

Categories: Consumer Electronics, Home Audio & Video

Buy Now

6% off

New Upgrade AMP 2CH TPA3255 MONO Split High power Class D Digital Power Amplifier 300W+300W RCA or XLR Input Version (Optional)

New Upgrade AMP 2CH TPA3255 MONO Split High power Class D Digital Power Amplifier 300W+300W RCA or XLR Input Version (Optional)

New Upgrade AMP 2CH TPA3255 MONO Split High power Class D Digital Power Amplifier 300W+300W RCA or XLR Input Version (Optional)

$747.45 $795.16

5 sold

Categories: Consumer Electronics, Home Audio & Video

Buy Now

1% off

6Z5P Electronic Valve Class J Tube Amplifier Rectifier Upgrade 6U5C 6X5G 6X5GT Vacuum Tube Provide Match 2PCS

6Z5P Electronic Valve Class J Tube Amplifier Rectifier Upgrade 6U5C 6X5G 6X5GT Vacuum Tube Provide Match 2PCS

6Z5P Electronic Valve Class J Tube Amplifier Rectifier Upgrade 6U5C 6X5G 6X5GT Vacuum Tube Provide Match 2PCS

$12.56 $12.69

15 sold

Categories: Consumer Electronics, Home Audio & Video

Buy Now

AogutxMullard 12AT7 ECC81 Vacuum Tube Upgrade B739 6201 6J8P 6SJ7 EF86 HIFI Audio Valve Electron Tube Amplifier Matched Quad DIY

AogutxMullard 12AT7 ECC81 Vacuum Tube Upgrade B739 6201 6J8P 6SJ7 EF86 HIFI Audio Valve Electron Tube Amplifier Matched Quad DIY

AogutxMullard 12AT7 ECC81 Vacuum Tube Upgrade B739 6201 6J8P 6SJ7 EF86 HIFI Audio Valve Electron Tube Amplifier Matched Quad DIY

$563.37 $563.37

5 sold

Categories: Consumer Electronics, Home Audio & Video

Buy Now

45% off

BREEZE 2025New upgrade hifi power amplifier reference inscription Naim NAC52 line balance front power amplifier

BREEZE 2025New upgrade hifi power amplifier reference inscription Naim NAC52 line balance front power amplifier

BREEZE 2025New upgrade hifi power amplifier reference inscription Naim NAC52 line balance front power amplifier

$1944.23 $3534.96

2 sold

Categories: Consumer Electronics, Home Audio & Video

Buy Now

29% off

Constant Temperature Crystal Oscillator Divider Board Supports Clock Signal Upgrade for Optical Drives, Network Cards, and More

Constant Temperature Crystal Oscillator Divider Board Supports Clock Signal Upgrade for Optical Drives, Network Cards, and More

Constant Temperature Crystal Oscillator Divider Board Supports Clock Signal Upgrade for Optical Drives, Network Cards, and More

$397.58 $559.97

2 sold

Categories: Consumer Electronics, Home Audio & Video

Buy Now

10% off

New upgraded enthusiast EMI filtering purification isolation transformer for AC power supply 30W AC 12V, 16V, 18V, 24V

New upgraded enthusiast EMI filtering purification isolation transformer for AC power supply 30W AC 12V, 16V, 18V, 24V

New upgraded enthusiast EMI filtering purification isolation transformer for AC power supply 30W AC 12V, 16V, 18V, 24V

$52.20 $58.00

Categories: Consumer Electronics, Home Audio & Video

Buy Now

1
2
3