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Douk Audio Balanced EQ Preamp: 7-Band Equalizer - Vacuum Tube Preamplifier with XLR RCA Inputs & Outputs - for Home Stereo HiFi System, Amplifiers, Active Speakers (T8 PRO Black) — Open-Box, 30% Off
Brand: Douk Audio
Condition: Used - Good
$9099
$12999
-30% Save $3900
Updated: 29 days ago
Description
Professional 7-band equalizer (50Hz-16KHz) precisely adjusts highs/mids/lows to compensate speaker defects & optimize any sound source, delivering custom audiophile-grade acoustic profiles.
Dual XLR/RCA inputs & outputs with balanced signal transmission eliminate interference noise, while independent channel balance control ensures accurate stereo imaging.
Upgradable 6H1N-BN vacuum tubes generate warm HiFi analog sound signature; pluggable sockets support ECC85/6SN7GT tubes for personalized timbre sculpting.
CH1/CH2 input switching & simultaneous RCA/XLR output modes enable flexible connectivity with amplifiers/active speakers, simplifying studio-grade setups.
Compact aluminum chassis with EMI-shielding iron plate fits desktops seamlessly, featuring vintage tube glow for both aesthetic appeal and noise-free performance.
Warm Tips
1. Two outputs (RCA / XLR ) can work at the same time.
2. When the scale line on frequency knobs points to the middle means this frequency band is neither weakened nor strengthened. When rotating it to its middle position there will be a feeling of pause.
3. Default 6H1N-BN tubes, can be changed to the following models: ECC85 / 6SN7GT / 6N1 / 6AQ8, and the 6SN7GT requires a 6SN7 to 6N1 socket adapter.
Parameters
Model: Douk Audio T8 PRO
Audio input: single-ended RCA / balanced XLR
Audio output: single-ended RCA / balanced XLR
Frequency response: 20Hz～20KHz(±1dB)
Frequency band: 50Hz / 125Hz / 315Hz / 750Hz / 2KHz / 6KHz / 16KHz
RCA input sensitivity: 0.775Vrms
RCA output level: 1.2Vrms
BAL input sensitivity: 1.5Vrms
BAL output level: 2.4Vrms
THD: 0.01%
SNR: ≥98dB
Working voltage: DC12V (≥2A)
Dimensions(W*D*H): 186*128*38mm / 7.32*5.04*1.50in
Package dimensions(W*D*H): 340*240*70mm / 13.39*9.45*2.86in
Net weight: 685g / 1.51lb
Package weight: 1.1kg / 2.43lb
Packing List
1*T8 Preamp
2*6H1N-BN Tube
1*DC 12V Power Adapter
1*User Manual
1. Two outputs (RCA / XLR ) can work at the same time.
2. When the scale line on frequency knobs points to the middle means this frequency band is neither weakened nor strengthened. When rotating it to its middle position there will be a feeling of pause.
3. Default 6H1N-BN tubes, can be changed to the following models: ECC85 / 6SN7GT / 6N1 / 6AQ8, and the 6SN7GT requires a 6SN7 to 6N1 socket adapter.
Parameters
Model: Douk Audio T8 PRO
Audio input: single-ended RCA / balanced XLR
Audio output: single-ended RCA / balanced XLR
Frequency response: 20Hz～20KHz(±1dB)
Frequency band: 50Hz / 125Hz / 315Hz / 750Hz / 2KHz / 6KHz / 16KHz
RCA input sensitivity: 0.775Vrms
RCA output level: 1.2Vrms
BAL input sensitivity: 1.5Vrms
BAL output level: 2.4Vrms
THD: 0.01%
SNR: ≥98dB
Working voltage: DC12V (≥2A)
Dimensions(W*D*H): 186*128*38mm / 7.32*5.04*1.50in
Package dimensions(W*D*H): 340*240*70mm / 13.39*9.45*2.86in
Net weight: 685g / 1.51lb
Package weight: 1.1kg / 2.43lb
Packing List
1*T8 Preamp
2*6H1N-BN Tube
1*DC 12V Power Adapter
1*User Manual
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- 30-day return policy
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Product Details
- SKU:
- awhd-us-b0c5mhz68y
- Model:
- SUC-T8-PRO-H
- Country:
- US
- ASIN:
- B0C5MHZ68Y
Shopping Smarter
Common questions about buying open-box and refurbished.
Why buy refurbished or open-box?
Refurbished and open-box products offer the same performance as new at a fraction of the price. You're already saving $39 on this listing. They've been inspected, tested, and are ready to use — the only difference is the price tag. Buying refurbished also reduces electronic waste, extending product life cycles and keeping functional devices out of landfills.
What's the difference between open-box and refurbished?
Open-box products are customer returns that have been inspected and confirmed functional. They may show little to no use — often the item was returned simply because the buyer changed their mind. Refurbished products have been professionally repaired or restored by technicians, tested to meet or exceed manufacturer specifications, and sometimes come with a warranty. Both are a smart alternative to buying new.
Why use OpenBoxFox?
Finding refurbished deals is time-consuming — you'd have to check Amazon Warehouse, Reebelo, Dyson Outlet, and others separately for Douk Audio products. OpenBoxFox aggregates these listings in one place, so you can compare and find the best deal without the legwork. We update pricing daily so you always see current availability and real savings.
Is it safe to buy refurbished?
Yes. Products listed on OpenBoxFox come from established retailers like Amazon, Reebelo, and Dyson — not unknown third-party sellers. Each retailer has buyer protection policies, return windows, and in some cases warranties. You get the price advantage of used goods with the purchase security of a known retailer.
