Lyra Prism 1

Prism Lyra 1 stereo USB converters, mastering grade with 1ch microphone preamp.

This unit was used many years by Northward Acoustics designers to test and calibrate the studios they design.

As such the unit has travelled the world a lot (in a dedicated Pelican case) and shows some minor signs of wear (see photos) but is in perfect working condition and was used until very recently.

We tested the unit to check all is fine and it performs perfectly well. It has been updated to the latest firmware a few months ago.

Front Panel:

Instrument inputs 1&2: Two  6.3mm mono jack sockets 
Headphone output: 6.3mm stereo jack socket, with illuminated volume control
Master volume control: Assignable to any selection of outputs, with LED halo indication
Level meters: Multi-segment, multi-color bargraphs with overload indication; two for analog, two for digital, assignable to inputs or outputs (analog output switchable 1/2 or 3/4) 
Input selector indicators: Indicate modes of analog inputs 1-2 as mic/line/instrument; plus phantom power indicator for mic mode
Overkiller-active indicators: For each analog input, lit when Overkiller limiters are acting
Digital input indicators: Input unlocked, and SRC (sample-rate converter) selected
Digital output indicator:SRC (sample-rate converter) selected [*Note1]
Sync indicator:Master, lit when interface is in local sync
Standby button:With standby indicator (also flashes when unit is in 'identify' mode)

Rear Panel: 

Mic inputs 1: one XLR sockets for mic input
Line inputs 1-2: two 6.3mm TRS jack sockets (balanced or unbalanced)
Line outputs 1-4: four 6.3mm TRS jack sockets (balanced or unbalanced)
Digital inputs: RCA socket for S/PDIF in, TOSLINK for S/PDIF or ADAT/SMUX in; (RCA can operate as AES3 input using XLR-RCA adapter supplied) 
Digital outputs: RCA socket for S/PDIF out, TOSLINK for S/PDIF or ADAT/SMUX out; (RCA can operate as AES3 output using RCA-XLR adapter supplied)
Wordclock I/O:
two BNC sockets, output and input (75R) 

USB 2.0 B type device socket

Analog Line Inputs:
Configuration: Electronically balanced, with fully-balanced analog signal path, Verifile enabled
Input sensitivity: Switchable ‘+4dBu’ (0dBFS=+18dBu) or ‘-10dBV’ (0dBFS=+6dBu)
Input impedance: 14.5kR
Unbalanced mode: Automatic
Total harmonic distortion: -117dB (0.00014%, -0.1dBFS)
THD+n: -111dB (0.00028%, -0.1dBFS)
Dynamic range: 116dB (-60dBFS)
Gain accuracy: ±0.05dB
Inter-channel cross-talk: 1kHz: <-140dB; 20Hz..20kHz: <-120dB
Inter-channel phase: 10Hz..5kHz: ±0.25º, 5kHz..20kHz: ±1.0º, 20kHz..50kHz: ±2.0º

Microphone Preamplifiers: 

Configuration: Electronically balanced, with fully-balanced analog signal path
Gain: 10dB to 65dB in 1dB steps (0dBFS = -56dBu to -1dBu)
Gain accuracy:±0.05dB
Input impedance: 5.5kR
THD+10dB gain: -116dB at -0.1dBFS (0.00016%) +40dB gain: -110dB at -0.1dBFS (0.00032%)

THD+n:+10dB gain: -108dB at -0.1dBFS (0.00040%)

Analog Line Outputs!

Configuration: Electronically balanced, with fully-balanced analog signal path
Output amplitude: Switchable ‘+4dBu’ (0dBFS=+18dBu) or ‘-10dBV’ (0dBFS=+6dBu)
Output impedance: 100R balanced, 50R unbalanced
Unbalanced mode: Automatic, with bootstrapping level compensation
Total harmonic distortion: -107dB (0.00045%, -0.1dBFS
THD+n: -106dB (0.00050%, -0.1dBFS)
Dynamic range: 115dB (-60dBFS)
Gain accuracy: ±0.05dB
Inter-channel cross-talk: 1kHz: <-135dB; 20Hz..20kHz: <-120dB.

Digital Input:

Formats supported: S/PDIF (RCA or TOSLINK), ADAT, ADAT SMUX (TOSLINK) µ
Sample rates supported: S/PDIF (2 channel): 44k1, 48k, 88k2, 96k, 176k4, 192k
ADAT (8 channel): 44k1, 48k; ADAT SMUX (4 channel): 88k2, 96k

Digital Output:

Formats supported:S/PDIF (RCA or TOSLINK), ADAT, ADAT S/MUX (TOSLINK) 
Sample rates supported:
S/PDIF (2 channel): 44k1, 48k, 88k2, 96k, 176k4, 192k
ADAT (8 channel): 44k1, 48k; ADAT S/MUX (4 channel): 88k2, 96k