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SPECS - ASP880 Input Information

ASP880 Input Information

Microphone Preamplifiers & Line Inputs

  • 8 hybrid class-A microphone preamplifiers (contain both transistors and op-amps)
  • Optimised for 0 to 60dB gain with an EIN (equivalent input noise) of -127.5dB.
  • Switchable -10dB pad on channels 1+2 to provide a -10 to +50dB padded gain range
  • Inputs provided on the rear panel using Combi XLR connectors, where the ¼” Combi Jack connector provides a padded balanced line input (input impedance  >6kΩ)
  • Input impedance switch functions as a variable pad for any line input signal.

D.I Inputs

  • Two discrete class-A JFET D.I. inputs (Channels 1+2)
  • Plugging in jacks to the connectors on the front panel will automatically select the D.I. signal over the signals present at the rear.
  • Input impedance >1MΩ
  • When pushed, the JFET circuit will provide 2nd and 3rd harmonic distortion to give the input a rich sound and colour.

ADC Direct Access

  • ADC balanced line inputs available on the rear panel DB25 connector (Tascam format)
  • Direct access to AD converter with +18dBu input headroom (0dBFS = +18dBu) for line level signals.
  • Provides a path for inserts between the mic preamps and the ADC.
  • Activate direct AD access by pressing the A-D button on the required channel.

Detailed Specs

MICROPHONE PREAMPLIFIERS:

(measured to insert send)

MIC GAIN:

-10 to +60dB (-10dB Pad)

LINE GAIN:

-16 to +44dB (-10dB Pad)*

PHANTOM POWER:

48v +/-4v @ 10mA/Channel

MIC EIN:

<-127.5dBu

CMRR:

>80dB @ 100 to 10kHz

MAXIMUM INPUT LEVEL:

+22dBu (+32dBu with Pad)

INPUT IMPEDANCE:

Mic LO: 220Ω Balanced Mic MED: 1k2Ω Balanced Mic HI: 2k8Ω Balanced Line (All Z): >6kΩ Balanced

FREQUENCY RESPONSE:

+/-0.5dB 10Hz to 100kHz

CROSSTALK:

<-85dBu @ 1kHz & 10kHz

THD+N @ 0dBu (1kHz):

0.003% (-90.5dBu)

SNR:

>90dB

HPF:

Sweepable from 25Hz to 250 Hz, 2nd Order (12dB/Octave)

XLR:

Pin 2 (Hot), Pin 3 (Cold) & Pin 1 (Shield)

1/4” JACK:

TIP (Hot), RING (Cold) & SLEEVE (Shield)

* Line input level at the combi jacks will be affected by the input impedance switch position, this can be used as a second pad control to adjust line input ranges on all channels.

DISCRETE JFET D.I (Channels 1 & 2):

(measured to line outputs / insert send)

D.I GAIN:

-10 to +60 dB (-10dB Pad)

MAXIMUM INPUT LEVEL:

+16dBu (typical), +22dBu

INPUT IMPEDANCE:

1MegΩ Unbalanced

FREQUENCY RESPONSE:

+/-0.5dB 10Hz to 50kHz

THD+N @ 0dBu (1kHz):

<0.03% (-70dBu)

SNR:

89dB

ADC LINE INPUTS (Insert Returns):

(measured at optical output under AES-17)

MAXIMUM INPUT LEVEL:

+18dBu

DIGITAL REFERENCE LEVEL:

0dBFS = +18dBu

INPUT IMPEDANCE:

>10kΩ Balanced

FREQUENCY RESPONSE:

+/-0.5dB 10Hz to Fs/2

CROSSTALK:

<-80dBu @ 1kHz & 10kHz

THD+N @ -1dBFS (1kHz):

<0.002% (-94dB)

THD+N @ -6dBFS (1kHz):

<0.002% (-94dB)

DYNAMIC RANGE:

113dB un-weighted

115dB A-weighted

PEAK LED LINEUP:

+16dBu (-2dBFS)

SIGNAL LED LINEUP:

Variable Brightness from -30dBu to -10dBu (-28dBFS)

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