top of page
Useful Arts SFP-30 Single Channel Tube Microphone Preamp 
The concept behind the Useful Arts SFP-30 Single Channel Tube Microphone Preamp is simple, take the exact audio and power circuitry from the SFP-60, put a single channel into a tabletop format, and make it less than half the price of the SFP-60. Done. Everything about the SFP-30 signal path is identical to the SFP-60, except that the SFP-30 lacks the DI input. Other than that, you can now get the finest, most flexible tube preamp available. A better sonic toolkit for recording simply isn't available at this price. Anywhere.

Useful Arts SFP-30 Single Channel Tube Microphone Preamp

$1,299.00Price

  • - High voltage soft start power supply puts out over 270 volts of clean, regulated power to ensure maximum headroom and the lowest noise possible

    - Each gain stage is single-ended, inherently Class A

    - Audio Magnetics (Input and Output Transformers, Plate Inductor) custom wound by Cinemag

    - Output Transformer with 50% nickel core

    - Frequency response is flat within 2 dB from 20 Hz-30 kHz

    - Each channel of the SFP-30 features 4 switches: High Pass Filter, Input Pad, Phase Reverse, and Phantom Power

    - Front panel switches control sealed, gold-plated relays to ensure years of operation without pops and clicks

    - The input and output levels of the triode stages of the SFP-30 are separately controllable by detented attenuators, and combined with the color control, the SFP-30 provides just over 55 dB of useable gain

    - Voltage selector for 115/230 volt operation in the IEC fuse block on black panel, gold-plated XLR connectors are on the front panel

    - The only active devices in the signal path are the three tube gain stages, consisting of 1 EF806 and 1 ECC82 per channel

    - New-manufacture JJ tubes for long life and easy replacement

    - Each channel features an output level VU meter, which is op-amp buffered to ensure that the signal is not loaded by the meter

    - The audio power supply features a toroidal dual-primary transformer and linear regulation for lowest noise

bottom of page