A phono preamplifier with tone control at an affordable price - typical of JDS Labs.
Powerful RIAA phono preamp plus clean 2-band EQ – flexible bypass switching
Atom Phono is a powerful RIAA phono preamplifier and a clean equalizer in one. Its flexible bypass switches allow it to be used as an equalizer or a phono preamp—both or neither. Selectable gain of 30/40 dB delivers far more volume than typical integrated phono preamps, while noise and distortion remain impressively low.
Atom Phono delivers exactly what you expect from a phono preamplifier and more. It fits seamlessly into your vinyl setup, can be paired with other Atom devices, or used as a mix of both.

- Tone Control
Also known as a 2-band EQ, this is a low-noise Baxandall adaptation customized for deeper bass and sparkling highs. Bypass the EQ at will—there’s no loss of performance when using the EQ with the phono stage.- Dual Gain
Selectable amplification of 30 dB or 40 dB. At 40 dB, a typical 15 mV MM cartridge is amplified to over 1.5 VRMS—about 4× stronger than an average phono preamp.- Subsonic Filter
A subsonic filter based on the NJM5532 prevents low-frequency turntable noise from being amplified and sent to your headphones or speakers, improving sound quality and preventing unwanted low-frequency driver movement.- Low Noise
As a phono preamplifier, Atom Phono is remarkably low-noise—even at high gain.
| Case Dimensions (mm, w/ knobs) | 145 × 132 × 35 mm |
| Case Dimensions (in, w/ knobs) | 5.7 × 5.2 × 1.4 in |
| Weight | 1 lb 1 oz |
| Configuration | |
| Inputs/Outputs | RCA |
| Phono Gain | 30 and 40 dB |
| Phono Input Impedance | 220k, 100pF |
| Phono Performance | |
| SINAD @ 1 kHz, 15 mV | 89 dB |
| Signal-to-Noise Ratio | 89 dB |
| Noise (low gain, A-weighted) | 5 µV |
| Crosstalk @ 10 kHz | -82 dB |
| SMPTE Ratio | -87 dB |
| Dynamic Range @ 1 kHz | 97 dB |
| Tone (EQ) Attributes | |
| SINAD @ 1 kHz, 2 VRMS, centered knobs | 110 dB |
| Noise, centered knobs | 3.8 µV |
| Freq Response, centered knobs (20–20kHz) | +/- 0.13 dB |
| Bass – adjustment range | +14 to -23 dB |
| Bass – shelving frequency | ~100 Hz |
| Treble – adjustment range | +13 to -22 dB |
| Treble – shelving frequency | ~4 kHz |
| Packaged Items | |
| In the box | Atom Phono, 15VAC power supply |