API 505-DI Direct Input Module – 500 Series
The API 505-DI is a premium-quality 500 Series direct input module, purpose-built for instruments such as electric guitar, bass, or keyboard. Designed to deliver pristine audio and tonal flexibility, the 505-DI brings API’s signature analog warmth, clarity, and punch to your direct recordings — all in a compact format ideal for modern studio setups.
With a wide-range gain control offering up to 55 dB, the 505-DI can accurately bring instrument-level signals up to a clean, professional +4 dBu output level. The unique TONE control helps reduce low-frequency muddiness, while the BRIGHT switch adds clarity and presence to high frequencies — making this unit capable of delivering mix-ready tones without the need for external EQ during tracking.
The front panel features a Hi-Z instrument input, a THRU output for simultaneous amp routing, and a switchable input load (100K / 400K) for optimal impedance matching with different instruments. Visual monitoring is handled by a 10-segment LED VU meter and a peak output LED to ensure precise level control. A built-in 20 dB pad accommodates hot signals from active pickups or high-output sources.
Internally, the API 505-DI features the classic fully discrete circuit design and is powered by the renowned API 2520 and 2510 op amps, delivering the legendary API sound with maximum transparency and reliability.
Key Features:
- Specifically designed for guitar, bass, and keyboard DI recording
- Wide-range Gain Control with up to 55 dB of gain
- Front-panel Hi-Z instrument input and THRU output
- Unique TONE control reduces muddiness
- BRIGHT switch enhances clarity and top-end presence
- 10-segment LED VU meter and Peak Output LED indicator
- 20 dB pad for high-output signals
- Switchable input impedance: 100K / 400K
- Fully discrete API design with 2520 and 2510 op amps
- 500 Series format – compatible with all standard racks
The API 505-DI is the ultimate direct input solution for capturing rich, detailed, and powerful instrument tracks, with flexible tone shaping and the trusted API sonic signature.
