Radial Engineering J33 RIAA Turntable Pre-Amp and DI for Dynamic Phono Cartridges

The Radial Engineering J33 is a high quality RIAA turntable preamp combined with a direct box that enables long-play records to connect directly to a professional mixing console, thus bypassing the usual DJ mixer. The J33 will be of interest to recording engineers that re-sample old vinyl record tracks for musical archiving to transfer long-play albums to CDs, and of course professional DJs and scratching.

Designed specifically for dynamic cartridges, the J33 begins with a low noise front end. Inputs are standard RCA with the required turntable ground lug. A precise RIAA low pass filter is tailored to produce a smooth, warm response. The signal is then buffered to provide the audio system with a standard -10dB signal with choice of RCA connectors for compatibility with home HiFi entertainment systems, 3.5mm (1/8") output to feed a laptop or iPod, or a stereo TRS ¼" jack for an audio recorder. A second set of direct box XLR outputs deliver a mic level signal to feed a concert snake, mic splitter and mixing desk preamp inputs. A rumble filter is also available for high sound pressure environments to reduce bothersome resonant feedback.

As with all Radial DIs, the J33 features a 14 gauge steel enclosure with a unique book-end design that creates a protective zone around the switches and connectors. The internal I-Beam construction ensures maximum rigidity while ensuring minimal stress on the sensitive solder joints. These combine to provide exceptional shielding against noise while ensuring greater dependability in the most demanding environments.

The Radial J33, a high performance turntable preamp that is ideally suited for music playback, archiving, DJing and sampling.

Features

• Combination RIAA Phono preamp and DI box
• Stereo RCA, ¼" TRS, 3.5mm and XLR outputs
• Built -in low frequency rumble filter
• Choice of +48V phantom or DC supply

Specifications

• Audio Circuit Type: Active circuit
• # of channels: Stereo
• Frequency Response: RIAA response curve for phonographic playback
• Dynamic Range: 91 dB
• Total Harmonic Distortion: 0.002% @ 1 kHz (-33 dBu input level)
• Intermodulation Distortion: 0.025% @ -45 dBu input
• Input Connectors: RCA
  • Input Impedance: 47 kΩ, unbalanced
  • Equivalent Input Noise (EIN): -82 dBu @ 0 dBu output
  • Max. Input Level: -30 dBu @ 1 kHz
• Output Connectors: RCA, 1/4" 3.5mm, XLR
  • Output Impedance: XLR, 600 Ω; all others, 470 Ω
• Voltage Gain: +37.8 dB
• Features: HPF, Rumble Fitler
• Construction: 14-gauge steel chassis and outer shell
• Power: +48V phantom or +15VDC/400mA external supply (included)
• Conditions: For use in dry locations only, 5-40°C
• Dimensions (H x W x D): 2" x 5" x 6.25"
• Weight: 2.80 lbs (1.28 kg)