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Equipment > Phono Preamps > Pro-Ject - Tube Box DS Phono Preamp
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PRO-JECT - Tube Box DS Phono Preamp

Phono Preamps

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Pro-Ject Tube Box DS

Pro-Ject's Tube Box DS is a high-end MM/MC phono preamplifier featuring an unprecedented level of flexibility at its price point. Based on a dual-mono circuit topology featuring a matched pair of premium ECC-803 Golden Pin Tubes, Tube Box DS employs premium parts throughout the preamplifier circuitry including costly ultra-low noise semiconductors. Unique to this model is continuously variable control of cartridge input impedance loading. By being able to adjust anywhere within the range of from 10-1,000 ohms, you can dial in the perfectly appropriate impedance for your particular phono cartridge therefore achieving the cartridge's optimized performance. Gain adjustment is also selectable in three steps of 40/50/60 dB, covering a wide range of both Moving Magnet of Moving Coil cartridge brands. For Moving Magnet cartridges, input capacitance is also variable. A switchable subsonic filter is also provided that can filter out frequencies below 20Hz.

  • MM/MC switches on rear panel
  • Unique continuously variable input impedance loading
  • Gain adjustment 40/50/60 dB
  • Capacitive adjustment 100/200 pF
  • Capacitance switch for MM cartridges
  • Switchable subsonic filter
  • Dual mono tube triode architecture
  • Premium ECC-803 Golden Pin Tubes
  • Ultra low-noise semiconductors
  • SMD technology
  • Available in silver and black
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Tubes: 2 x ECC-803 Golden Pin Triode Type
Load Impedance: Variable from 10 - 1,000 ohms
Input Capacitance: Variable 47pF, 147pF, 267pF and 367pF / 47k ohms
Input Gain: 40dB / 50dB / 60dB
Noise Floor: -82dB
THD: 0.1%
RIAA Curve Accuracy: 20Hz-20kHz / max 0.5dB
Subsonic Filter: 20Hz at 18dB/octave, Switchable
Input: 1pr RCA Jacks
Line Level Outputs: 1pr RCA Jacks
Power Supply Output Voltage: 18 VAC / 1,000mV
Power Consumption: 490mA DC
Dimensions (WHD): 4.1" x 2.9" x 5.7"
Weight: 2.4 lbs. Finish: Black or Silver

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User Manual (PDF, 93 KB)

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