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Inside the Presonus Inspire recording interface
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January 05, 2012, 01:54:50 PM
    • VinylAudio.net
  • BSD2000
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I don't know about you, but I love pictures of the guts of audio equipment. Whether it's the complex inner workings of a reel to reel tape deck, or the look inside the design, layout and construction of an audio amp. I like to see how an audio component was built and what components went into it's design.

Here's a few pictures inside my Presonus Inspire recording interface:
[attach=1]  [attach=2]  [attach=3]  [attach=4]

Technical Specifications:

Microphone Preamps 1-2
   Microphone input    XLR Female
   Frequency Response (0.5 dB)    10 Hz to 50 kHz
   Instrument Input Impedance (Balanced)    500k Ohm
   THD+N (unwtd, 1kHz @ +4 dBu Output, Unity Gain    < 0.01%
   Phantom Power (2 VDC)   +48 VDC
Instrument Input 1-2
   Type   1/4" TS
   Input Impedance   1 Mega Ohm
Line Inputs 3-4 (RCA)
   Frequency Response (+0,- 0.5dB)    10Hz to 50kHz
   Input Impedance (Balanced)    47.5 KOhm
Headphone Output
   Type    Mini TRS Active Stereo
   Maximum Output   150 mW/CH @ 60 Ohm Load
   Frequency Response (1.0 dB)    20 Hz - 20kHz
Digital Audio
   FireWire (IEEE 1394) Speed   400mbps
   ADC Dynamic Range (Awtd, 48 kHz Sample Rate)    102 dB
   DAC Dynamic Range (Awtd, 48 kHz Sample Rate)    108 dB
   Bit Depth   24
   Internal Sample Frequency Selections (kHz)    44.1, 48, 88.2, 96
   Daisy-chain multiple Inspire 1394    4 units total, maximum of 16 input/output at 96kHz

Information from the Wolfson website on the WM8590 AD/DA chip:

"The WM8590 is a high performance, stereo audio codec with differential inputs and outputs. It is ideal for surround sound processing applications for home hi-fi, DVD-RW and other audio visual equipment. The stereo 24-bit multi-bit sigma delta ADC has programmable gain with limiting control. Digital audio output word lengths from 16-32 bits and sampling rates from 32kHz to 96kHz are supported. A stereo multi-bit sigma delta DAC is used with digital audio input word lengths from 16-32 bits and sampling rates from 32kHz to 192kHz."


    Audio Performance
       - 110dB SNR (A weighted @ 48kHz) DAC
       - 102dB SNR (A weighted @ 48kHz) ADC
     DAC Sampling Frequency: 32kHz 192kHz
     ADC Sampling Frequency: 32kHz 96kHz
     Stereo ADC input analogue gain adjust from +24dB to 21dB in 0.5dB steps
     ADC digital gain from -21.5dB to -103dB in 0.5dB steps
     Programmable Limiter on ADC input.
     Stereo DAC with differential analogue line outputs.
     3-Wire SPI Compatible Control Interface
     Master or Slave Clocking Mode
     Programmable Audio Data Interface Modes
       - I2S, Left, Right Justified or DSP
       - 16/20/24/32 bit Word Lengths
     4.5V to 5.5V Analogue, 2.7V to 3.6V Digital supply Operation
     28-lead SSOP Package
« Last Edit: January 05, 2012, 02:50:07 PM by BSD2000 »
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