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Specification
Brand : Nobsound
BulletPoint1 : Tube Preamp with 4-Way RCA Selector & Splitter:​​ Seamlessly manage up to 4 high-fidelity audio sources (CD players, DACs, Blu-ray players, streamers) without swapping cables, while our ​180V optimized tube circuit​ and ​metal-shielded isolated power​ deliver cleaner, interference-free signals for your ​home stereo receiver​ and ​speakers.
BulletPoint2 : High-Fidelity Tube Headphone Amplifier:​​ Unleash up to ​500mW​ of pure tube power, effortlessly driving ​16-600Ω headphones​ (compatible with Sennheiser HD600/650, Beyerdynamic DT 990 Pro etc.). Experience rich, dynamic sound with adjustable bass/treble controls (±6dB) for personalized tonal perfection.
BulletPoint3 : Vintage VU Meter & Premium Glowing Tubes:​​ Elevate your listening space with the mesmerizing dual-channel ​VU Meter​ and warm glow of genuine vacuum tubes. Enhanced by customizable ​RGB lighting, it delivers an immersive retro ambiance perfect for audiophiles in any ​home stereo or studio setup.
BulletPoint4 : Ultra-Low Noise Signal Purity:​​ Engineered for audiophile-grade clarity, our ​isolated power section​ with full ​metal shielding​ dramatically reduces interference. Combined with a ​THD ≤0.06%​​ and ​SNR ≥107dB, it ensures the cleanest possible audio signal path from source to your ​speakers or headphones.
BulletPoint5 : Effortless Customization: Easy Op-amp & Tube Upgrades:​​ Unlock endless sonic possibilities with our user-friendly ​pluggable sockets. Easily swap the included ​NE5532 op-amp​ for higher-end 2134/2604/5532/2068/muse02 ​dual op-amps​ or replace the default ​ECC83 tube​ with premium ​PSVANE 12AX7-S / Shuguang 12AX7B / 7025​ to tailor your unique listening journey.
Color : Black
CompatibleDevices : 48V 5A Charger for Fosi Amplifier BT20A Pro
ConnectivityTechnology : Powerline
ConnectorType : Corded Electric
ControlMethod : push_button
IncludedComponents : LM386 Amplifier Board
IncludedComponents1 : 1* TUBE-T5C Preamp
IncludedComponents2 : 1* DC 12V Power Adapter
IncludedComponents3 : 1* Hexagonal Wrench
InputVoltage : 100 volts_of_alternating_current
ItemName : ​Douk Audio Vacuum Tube Preamp: Headphone Amp with VU Meter, 4-Way RCA Selector Switch Box, Preamplifier with Tone Control for​ Receivers, Amplifiers, Speakers, 16-600Ω Headphones (TUBE-T5C)
ItemPackageDimensions_Height : 11.22 inches
ItemPackageDimensions_Length : 6.1 inches
ItemPackageDimensions_Width : 4.33 inches
ItemTypeKeyword : audio-component-amplifiers
Manufacturer : Nobsound
ModelNumber : TUBE-T5C
MountingType : Surface Mount
NumberOfBoxes : 1
NumberOfChannels : 2
NumberOfItems : 1
OutputCurrent : 5 amps
OutputPower : 10 watts
OutputVoltage : 48 volts_of_direct_current
PartNumber : TUBE-T5C
PowerSourceType : Corded Electric
ProductDescription : Warm tips
1. All outputs work at the same time. The volume/treble/bass are controlled simultaneously.
2. If the VU meter needle isn't moving noticeably, please turn up the bass and the master volume.
3. 10-second warm-up required; audio delayed during tube activation.
4. The TUBE-T5C with 1PC pluggable NE5532 op-amp, can be upgraded by dual op-amps like 2134/2604/5532/2068/muse02.
5. Default one ECC83 tube, can be directly replaced by PSVANE 12AX7-S and Shuguang 12AX7B / 7025 / 12AX7 etc.
6. High voltage inside, please turn the TUBE-T5C off first before replacing the op-amp and the tube, and avoid dropping anything inside.

Parameters
Brand: Nobsound
Model: TUBE-T5C
Audio input: 4 groups of RCA
Audio output: 2 groups of RCA / 3.5mm headphone jack
Input sensitivity: 0.775V
Rated output level: 2V
Frequency response: 20Hz-20KHz (±0.8dB)
THD+N: 0.06%
SNR: ≥107dB
Bass/treble range: ±6dB
Headphone output power: 500mW/32Ω
Matched headphone impedance: 16-600Ω
Working voltage: DC 12V
Dimensions (W*D*H): 152 * 92 * 85mm / 5.98 * 3.62 * 3.35in
Package dimensions (W*D*H): 285 * 155 * 110mm / 11.22 * 6.10 * 4.33in
Net weight: 827g / 1.82lb
Package weight: 1.10kg / 2.42lb

Packing list
1* TUBE-T5C Preamp
1* DC 12V Power Adapter
1* Hexagonal Wrench
ProductSiteLaunchDate : 2025-04-08T08:02:14.125Z
SupplierDeclaredDgHzRegulation : not_applicable
SupplierDeclaredHasProductIdentifierExemption : 1
UnitCount : 1
UnspscCode : 52161547
Voltage : 5 volts_of_direct_current
WarrantyDescription : 18-Month Limited Warranty