APL1 – Unbeatable Quality in Pocket Size

APL1 is a FIR based 2 channel equalizer with 4096 coefficient FIR filters per channel allowing curve resolution of up to 6Hz. It is capable of creating any arbitary Amplitude Frequency Respone (AFR), Phase Frequency Response (PFR) or Delay Frequency Response (DFR) suitable for very detailed and accurate corrections and equalization in critical applications such as studio monitors, headphones and car audio systems.

USB connection allows the upload of correction filter files to APL1 unit even in the middle of a live performance without any disturbdances in sound. The unit can optionally have a 16 preset memory accessible trough an external, freely placeable rotary switch, excellent for car audio installations.

APL1 is available in three different configurations:

  1. RCA model for car usage – 4 RCA connectors for analog in/out, 2 – for SPDIF digital coaxial in/out, 2 TOSLINK digital in/out
  2. XLR model – 4 XLR  connectors for analog in/out, 2 RCA– for SPDIF digital coaxial in/out, 2 TOSLINK digital in/out
  3. XLR model with optional AES/EBU digital in/out - 4 XLR  connectors for analog in/out, 2 RCA– for SPDIF digital coaxial in/out, 2 TOSLINK digital in/out; 2 XLR for AES/EBU digital in/out

Specifications:

  • Number of processing channels: 2
  • Resolution: 48kHz/24bits
  • Frequency resolution of correction curve: 6 Hz, 4096 coefficients at 24 kHz bandwidth
  • Inputs: 2 analog balanced, digital - SPDIF coaxial and TOSLINK optical, AES/EBU on order
  • Outputs - 2 analog (XLR balanced), digital - SPDIF coaxial and TOSLINK optical, AES/EBU on order
  • Input/output analog signal max levels: +10dBu (can be changed on order)
  • Analog input/output connection types: RCA or XLR
  • Analog input impedance: 10 kOhm
  • Analog output impedance: 150 Ohm
  • Common mode signal rejection (CMSR) of analog input – 90 dB
  • Dynamic range (analog input/output):104 dBA.
  • THD (analog input/output): 0,07%
  • Signal delay: 1.6 ms (analog input/output), 2.4 ms (digital input/output)
  • Control and upload interface: USB
  • Interface computer system: Microsoft Windows
  • Power: 6.5 to 16 V DC, 3.5 W.
  • Dimensions 15х20х5.3 cm.