API ASM164

API ASM164 Summing Mixer

The API ASM164 Summing Mixer is a 16-channel analogue rackmount mixer delivering classic API sound. Based on the summing section of THE BOX® console, it features DB-25 connectivity, dual stereo buses, insert points, 2510 and 2520 op-amps, and balanced I/O, ideal for hybrid studios seeking API summing in a compact, affordable format.

API ASM164 Summing Mixer Details

The API ASM164 Summing Mixer delivers the unmistakable API sound in a streamlined 16-channel format, purpose-built for today’s hybrid production environments. Housed in a compact 19-inch rackmount chassis, the API ASM164 brings the sonic pedigree of API’s acclaimed THE BOX® console to professional project studios, home setups, and commercial facilities alike.

With 16 balanced analogue summing channels and DB-25 connectivity, the API ASM164 features individual insert send/returns on each channel, global 0dB bypass, and continuously variable panning with centre detents. A 31-step detented level control ensures precise adjustments, while each channel can be independently assigned to two stereo mix buses – Mix-A and Mix-B – for flexible routing and parallel processing.

The internal signal path is driven by proprietary API 2510 input op-amps, classic 2520 op-amps, and custom output transformers, preserving the rich, punchy tone that defines API’s legacy. Balanced stereo external inputs and comprehensive rear-panel I/O expand integration options, while front-panel 4-segment LED meters and VU metering for stereo outputs provide clear visual feedback.

Designed with efficiency and performance in mind, the API ASM164 Summing Mixer offers a cost-effective path to authentic API summing with no compromise on character or quality.

Features

  • 16 Analog Summing Channels
  • Balanced, Line-Level, DB-25 Connectors
  • Global 0dB Channel Level Control Bypass
  • Proprietary API 2510 Input OpAmps
  • Insert Send/Return On Each Channel
  • 4-Segment LED Level Meters
  • 2 Stereo Program Buses – Mix-A and Mix-B
  • Each Channel Assignable to Mix-A and/or Mix-B
  • Continuously Variable Panning With Center Detent
  • 31-Step Detented Level Control
  • Balanced Stereo External Input (Assignable to Mix-A and/or Mix-B)
  • Signature API 2520 OpAmps and Proprietary Output Transformers
  • Analog Stereo Output Level VU Meters
  • Comprehensive Rear Panel Connections with Balanced In/Out
  • External Power Supply

Specifications

  • Input connectors: Channels: 25-pin D-sub (standard pinout); External input: XLR female
  • Output connectors: Mix outputs: XLR male; Inserts: ¼” balanced
  • Input impedance: 30k ohms, balanced
  • Mix output impedance: 75 ohms, transformer coupled, balanced
  • Max input level: +25dBu
  • Max output level: +25dBu
  • Frequency response: ±0.5dB from 20Hz to 40kHz
  • THD+N: < 0.02% @ +4dBu, 1kHz
  • Signal to noise ratio: -112dBr
  • Power requirement: 30 watts, external PSU (model 951-0365)

The details provided above are drawn from historical documents like advertising brochures or user manuals. They’re shared without bias or review. This info is given solely for your consideration, helping you gauge its usefulness to you.

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