Millennia STT-1 Twin Topology Recording Channel - Manual (Page 18)

STT-1
TYPICAL SPECIFICATIONS
Instrument DI Input Amplifier Selected 12AT7 dual triode vacuum tube
Solid State Input Amplifier Discrete NPN Transistor Hybrid (HV-3 PAM-01)
Vacuum Tube Input Amplifier Selected 12AX7 & 12AU7 vacuum tubes
EQ and Dynamics Amplifiers Selected 12AX7 & 12AU7 vacuum tubes
— or FSA-01 J-FET all-discrete semiconductors
Total Vacuum Tubes Five (5)
Total Discrete Transistors (FET & NPN) Twenty five (25) in audio path
THD + Noise, 20 Hz - 30 kHz .005% typical SS, .05% typical VT
Frequency Response -3 dB points 3 Hz to 200 kHz, typical. Varies with topology
Frequency Response, +/- 0.5 dB 10 Hz to 100 kHz typical. Varies with topology
Maximum Balanced Mic Input Level +14 dBu (SS), +3 dBu (VT), non-xfmr
Maximum Balanced Line Input Level +30 dBu (SS), +19 dBu (VT), non-xfmr
Maximum Mic Input to Transformer +1 dBu @ 30 Hz, +20 dBu @ 1 kHz (3% THD)
Maximum Output Level +32 dBu, main balanced output
Maximum System Gain 60 dB, main balanced output.
Input Impedance 6,200 ohms, nominal, microphone input
2,200 (x2) ohms, line input
> 1 megohm, instrument DI input
Output Impedance 24.3 (x2) ohms balanced. 49.9 ohms unbalanced
Noise (Common source, mic in) -71 dB @ 50 dB gain (-121 dB EIN), solid state
(30 ohm source, mic in) -68 dB @ 50 dB gain (-118 dB EIN), solid state
(150 ohm source, mic in) -66 dB @ 50 dB gain (-116 dB EIN), solid state
Noise (Line in, EQ in, dynamics in) better than -90 dB, varies with topology
Common Mode Rejection Ratio, mic in > 50 dB, 100 mV CM, varies with topology
> 80 dB typical @ 60 Hz. varies with topology
Three-pin XLR Polarity Pin 2 = positive polarity, Pin 1 = ground
1/4" Phone Polarity Sleeve = ground, Tip = positive polarity unbal
DYNAMICS SPECIFICATIONS
Threshold Range 40 dBu, Continuously Adjustable
Attack Range 2 mS to 100 mS, Continuously Adjustable
Release Range 20 mS to 3.0 S, Continuously Adjustable
Compression Ratio Range minimum 1.4:1 (6:1 at 12 o'clock pot setting)
maximum 30:1 Continuously Adjustable
De-essing Frequencies Off, 4.9k, 6.8k, 8.2k, 10.7k, 12.0 kHz
Dynamics pre/post EQ selection? Yes
Twin Topology Selection (EQ In) TT Switch In = FET Signal Path Amplifier
TT Switch Out = Vacuum Tube Signal Path
Amplifier
EQ Select Switch Out "Passive" Opto-Compression Shunt Network
(see instructions pg 16 for details on EQ and
Dynamics co-operation)