Home / 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 Silver)
  • 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 Silver)
  • 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 Silver)
  • 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 Silver)
  • 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 Silver)
  • 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 Silver)
  • 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 Silver)
  • 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 Silver)
  • 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 Silver)
  • 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 Silver)

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 Silver)

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
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  • Detail

    50Hz-16KHz Equalizer | Vacuum Tube Preamplifier | XLR Blanced Input & Output | 2-Way Audio Switch | Compact Design

    1For Amplifiers2For Active Speakers1Front2Back3Side4Top Audio input:single-ended RCA / balanced XLRAudio output:single-ended RCA / balanced XLRFrequency response:20Hz～20KHz(±1dB)Frequency band:50Hz / 125Hz / 315Hz / 750Hz / 2KHz / 6KHz / 16KHzRCA input sensitivity:0.775VrmsRCA output level:1.2VrmsBAL input sensitivity:1.5VrmsBAL output level:2.4VrmsTHD:0.01%SNR:≥98dBWorking voltage:DC12V (≥2A)Dimensions(W*D*H):186*128*38mm / 7.32*5.04*1.50inPackage dimensions(W*D*H):340*240*70mm / 13.39*9.45*2.86inNet weight:685g / 1.51lbPackage weight:1.1kg / 2.43lb

  • What does this device do?

    T8 can compensate for the defects of speakers and sound field by adjusting 7-band high, middle and low frequencies, and modify various sound sources. The timbre and loudness also can be changed to achieve different sound effects.

  • Can I use RCA and XLR outputs simultaneously?​​

    Yes! Both outputs work concurrently - connect XLR to studio monitors and RCA to a subwoofer simultaneously. Ideal for multi-amp setups without signal degradation. Perfect for A/B testing or expanding your audio chain.

  • How do I reset EQ frequencies to neutral?​

    Rotate any band's knob until you feel a tactile pause at the center position (scale line vertical). This zero point means no boost/cut applied. Reset all knobs to center for flat reference response.

  • What tubes can I upgrade to?

    Stock 6H1N-BN tubes support direct swaps with 6N1/6AQ8/ECC85. For 6SN7GT tubes, you MUST use a 6SN7-to-6N1 adapter (not included). Adapter ensures proper pin alignment and voltage safety.

    • 7-Band EQ Preamp

    50Hz / 125Hz / 315Hz / 750Hz / 2KHz / 6KHz / 16KHz

    Pro-Grade XLR Balanced Input/Output System

    Classic 6H1N-BN Vacuum Tube Sound Engine

    RCA/XLR Input Switch + Simultaneous Outputs

    HiFi Pre-Amplifier for Power Amps

    XLR/RCA Driver for Studio Monitors

    Parameters

    What does this device do?

    Can I use RCA and XLR outputs simultaneously?​​

    How do I reset EQ frequencies to neutral?​

    What tubes can I upgrade to?

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