Pricing and availability

We compare 600+ stores and found this item at 4 stores. Prices updated .

Sweetwater
5.0 (7)
$595.00
Reverb
$565.25 New
$430.00 Used
Thomann
4.8 (4)
$777.00 $759.00 $18.00 · All time low
Vintage King
4.0 (1)
$595.00

Average Price: $589

High-end/Boutique

$119

$300+

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Price History

Based on price data from 3 merchants for "API 505-DI 500 Series Direct Interface Module". Prices shown reflect NEW condition. Tracking began Apr 2, 2026.

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Description

Unleash the power of your instruments with the API 505-DI 500 Series Direct Interface Module, a must-have for any serious studio or touring musician. Designed with API's renowned discrete circuitry, this direct interface module delivers the classic, fat, and punchy sound that has graced countless hit records. Whether you're plugging in a bass, guitar, or synth, the API 505-DI ensures your sound is captured with maximum clarity and depth.

The module offers a front-panel Hi-Z input and a thru output, making it incredibly versatile for any setup. With a gain control providing up to 55 dB of gain and a -20dB pad, it can handle even the hottest active instruments without breaking a sweat. The tone control feature allows you to dial in the perfect amount of girth, while the "Bright" switch adds a touch of sheen to your top end, ensuring your sound is polished and professional.

What sets the API 505-DI apart is its ability to shape your signal with precision, thanks to its flexible tone control and LED VU meter. This module is compatible with any 500 Series frame, making it a seamless addition to your existing setup. Whether you're in the studio or on the road, the API 505-DI is your key to achieving that coveted API sound—rich, dynamic, and unmistakably professional.

Key Features:

  • API discrete circuitry for classic sound
  • Hi-Z input and thru output
  • Gain control with up to 55 dB gain
  • -20dB pad for hot active instruments
  • Tone control for sound shaping
  • "Bright" switch for enhanced top end
  • LED VU meter for signal monitoring
  • Compatible with 500 Series frames

Product specs

Preamp Type Solid State DI
Number of Channels 1
Frequency Response 30Hz-20kHz
Pads -20dB
EQ Yes
Analog Inputs 1 x 1/4" (DI)
Analog Outputs 1 x 1/4" (Thru)
Module Slot Size Single

FAQs

What are the main features of the API 505-DI 500 Series Direct Interface Module?

The API 505-DI features a solid-state preamp, a frequency response of 30Hz-20kHz, and includes a -20dB pad. It offers 1/4" analog input and output connections, and fits into a single module slot.

Is the API 505-DI suitable for both bass and guitar?

Yes, the API 505-DI is designed to handle a wide range of instruments, including bass and guitar, thanks to its solid-state preamp and wide frequency response.

Does the API 505-DI include any EQ controls?

Yes, the API 505-DI includes EQ capabilities, allowing you to shape your sound directly from the module.

How does the -20dB pad on the API 505-DI affect its performance?

The -20dB pad reduces the input signal level, which is useful for preventing distortion when processing high-output instruments.

What type of output does the API 505-DI provide?

The API 505-DI provides a 1/4" Thru output, allowing for easy integration with other gear in your signal chain.

Reviews

PROS

  • Exceptional sound clarity and warmth, even with large transformers

  • Versatile tone controls for precise sound sculpting

  • Enhanced bass control without sacrificing sound fullness

  • Notable saturation and distortion when gain is driven

  • Ideal for both active and passive bass guitars

  • Quick response typical of API products

  • Effective impedance matching and muting features

  • Remarkable for direct interface with various instruments

  • Delivers a unique API sound distinct from software emulations

CONS

  • High price point for a DI box

  • Limited versatility with certain bass guitars

Critic Reviews

New Gear Review: API 505 DI Module - Music Connection Magazine

musicconnection.com

API's 505-DI module delivers impressive versatility in a compact 500-series format. With features like adjustable gain and tone control, a bright switch, and a VU meter, it offers flexibility for guitar, bass, and keyboard inputs. The module's ability to amplify signals without needing a pre-amp is a standout, while the price point of $595 may deter budget-conscious buyers. Overall, it's a solid investment for those seeking to enhance their audio setup.

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