Derumbleizer specifications
Measured performance of the Derumbleizer for in-phase (music) and out-of-phase (rumble) signals. All measurements are the Derumbleizer stage itself and do not include the preamp or RIAA equalization sections unless noted.
Electrical specifications
- Gain — Derumbleizer section
- Unity, ±0.5 dB (10–50,000 Hz)
- Gain — phono preamp section
- 36 dB
- Phase shift — Derumbleizer section
- 0°, ±2.0° (10–50,000 Hz)
- Frequency response (music)
- 10 Hz – 50 kHz
- Rumble attenuation
- Out-of-phase signals sharply reduced below ~100 Hz
- Phono cartridge type
- Moving magnet (built-in preamp)
- Equalization
- Standard RIAA, or custom on request
- Power supply
- Quiet dual-regulator wall-mount supply (included)
Because the low-pass and high-pass phase shifts cancel on recombination, the Derumbleizer introduces essentially zero phase shift for the signals you actually want to hear — the music.
Physical specifications
- Basic version size
- 1-3/4 × 3-1/8 × 5-1/4 in (44 × 78 × 33 mm)
- Deluxe version size (in development)
- 1-3/4 × 3-1/8 × 7-1/2 in incl. knobs (44 × 78 × 190 mm)
- Enclosure
- Extruded aluminum — clear or black anodized
- Components
- Low-noise ICs, precision resistors & capacitors throughout
- Connections
- Phono in (moving magnet), line/aux out, direct to sound card
- What’s in the box
- Derumbleizer, wall-mount power supply, printed instructions, stick-on rubber feet
Noise & performance context
The Derumbleizer’s noise floor is far below anything your system will ever encounter:
Records
Dynamic range around 60 dB (up to ~70 dB with CX records).
Turntables
Typical noise levels around −80 dB.
CDs
Reference noise around −90 dB.
The Derumbleizer is quiet enough to be completely transparent in this context — it adds no audible noise of its own. See the performance charts for measured frequency and phase response.
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