SPL Audio P8

The SPL Audio P8 is a professional eight-channel microphone preamplifier designed for high-quality multichannel recording in recording studios, project studios and professional production environments. Featuring eight individually designed discrete transistor preamps, it delivers a clean, transparent signal path with extensive gain control and independent channel settings. Each channel includes switchable 48 V phantom power, a −20 dB pad, polarity inversion and an analog high-pass filter, making the P8 a versatile solution for recording drums, ensembles, multiple microphones and other multichannel sources.

Key Features

• Eight Discrete Microphone Preamplifiers: Each channel uses individual transistor-based circuitry rather than integrated-circuit preamp designs.
• Wide Gain Range: Provides adjustable microphone gain from +8 dB to +62 dB, accommodating a broad range of microphone output levels.
• Individual 48 V Phantom Power: Each channel features independently switchable phantom power for compatible condenser microphones and other equipment requiring phantom power.
• Switchable −20 dB Pad: Reduces the incoming microphone signal to accommodate high-output sources and help prevent input-stage overload.
• Polarity Inversion: Individual polarity-reversal switches help optimize phase relationships between microphones during multitrack recording.
• Analog High-Pass Filter: Switchable 80 Hz filter with a 6 dB-per-octave slope helps reduce subsonic noise, rumble and unwanted low-frequency energy.
• Multichannel Signal Monitoring: Individual LED indicators display signal levels, with green at −25 dBu, yellow at 0 dBu and red at +19 dBu in the standard analog version.
• Balanced Microphone Inputs: Eight electronically balanced XLR microphone inputs with Neutrik connectors and gold-plated contacts.
• Multichannel Analog Outputs: Two DB25 connectors carry the analog line-level signals from preamps 1–8, allowing connection to multichannel converters or compatible recording equipment.
• Optional ADAT Conversion: An optional eight-channel A/D converter module adds digital output through optical ADAT connections, supporting sampling rates up to 192 kHz.
• Professional Headroom: Supports a maximum microphone input level of +13.5 dBu at minimum gain, increasing to +33.5 dBu with the −20 dB pad engaged.
• Linear Power Supply: Uses an internal linear power supply with a shielded toroidal transformer.
• Rackmount Construction: Features a durable 19-inch, 1U steel chassis with a black anodized aluminum front panel.

Technical Specifications

• Device Type: Eight-channel microphone preamplifier
• Number of Channels: 8
• Microphone Gain Range: +8 dB to +62 dB
• Pad Attenuation: −20 dB
• Phantom Power: +48 V, independently switchable per channel
• High-Pass Filter: 80 Hz, 6 dB/octave
• Maximum Microphone Input Level: +13.5 dBu; +33.5 dBu with pad engaged
• Input Impedance: 10 kΩ
• Output Impedance: 75 Ω
• Frequency Response: 15 Hz–200 kHz
• Equivalent Input Noise (EIN): −124 dBu
• Noise (A-weighted, 150 Ω source, 30 dB gain): −94 dBu
• THD + N (1 kHz, 30 dB gain): 0.003%
• Common-Mode Rejection (1 kHz): Less than 78 dB
• Analog Operating Voltage: ±18 V
• Mains Voltage: Selectable 230 V AC / 50 Hz or 115 V AC / 60 Hz
• Maximum Power Consumption: 27 VA
• Dimensions (W × H × D): 482 × 44 × 237 mm
• Rack Format: 19-inch, 1U
• Unit Weight: Approximately 4.15 kg

Official Manufacturer Page

https://spl.audio/en/spl-produkt/p8/