Dedicated to the lives, memory, and families of Chris Camacho and Gabe Weiner — two young men who shared a passion for great audio, and who left us much too soon.
READ THIS FIRST! Any changes or modifications not expressly approved by MILLENNIA MEDIA, INC. could void your authority to operate this equipment under the EC or FCC rules. 1. Copyright: You acknowledge that no title to the intellectual property in the STT-1 is transferred to you. 2. Inspection: Inspect packing box(es), STT-1, and cable(s) for damage, unusual marks, or shortages. It is your responsibility to report damage, shortage, or misshipments in a timely manner.
SAFETY PRECAUTIONS For your safety and the safety of others, be sure to read and understand all safety and operational instructions before attempting to use the STT-1. WARNING: The STT-1 internal circuitry carries lethal voltages. Carefully observe all warnings, precautions, and instructions on the STT-1 and as described in the instructions supplied with the unit. 1.
QUICK START READ THIS!! The STT-1 operates with lethal operating voltages — the voltage inside the STT-1 can kill you. Never, under any circumstances, remove the top cover. Refer to a qualified electronics technician any and all servicing and other operations which require the top cover to be removed. Congratulations on your purchase of the Millennia Media STT-1 Origin tracking and post system.
INTRODUCTION (see block diagram) The STT-1 Origin is a collection of Millennia's essential product line combined into one box. You might call it our "greatest hits" compilation. The STT-1 is a single channel (mono) processing chain with various signal path topologies (vacuum tubes, discrete transistors, audio transformer, transformerless) all selectable at various functions. The STT-1 offers an entirely discrete, entirely Class-A direct signal path from input to output.
STT-1 REAR PANEL (1) MICROPHONE INPUT "MIC INPUT" Conventional 3-pin female XLR input jacks for use with all standard balanced microphones, both phantom and non-phantom powered. Provides +48 Volts DC Phantom powering via front panel switch. Input impedance is approximately 6,200 ohms with phantom power switched in. Microphone input is selected via a front panel rotary switch marked "Source - MIC." Pin 2 is positive polarity. Pin 3 is negative polarity.
115 STT-1 Origin Rear Panel PUSH STT-1 ORIGIN STT-1 PUSH
(5) MAIN OUTPUT #2 "MAIN OUT - UNBAL" Conventional three pin male XLR connector providing unbalanced, line level output from all stages of the STT-1. Can be used simultaneously with all other outputs. This XLR sits directly above the 1/4" unbalanced output connector. Pin 1 is ground. Pin 2 is positive polarity. Pin 3 is ground. This output is all discrete, pure Class-A, and is capable of driving < 600 ohm loads and long, high capacitance cables.
STT-1 FRONT PANEL — FRONT END (1) FRONT-END AMPLIFIER SELECT SWITCH - TWIN TOPOLOGYtm Pushbutton switch which selects the front-end gain amplifier as either entirely vacuum tube (VT) or entirely solid state (SS). When used as a microphone preamp, the solid state amplifier is essentially identical to the front-end found on Millennia's acclaimed HV-3 — used by a who's who in critical acoustic recording worldwide.
(3) POLARITY REVERSE SWITCH "POL REV" A pushbutton switch which, when depressed and illuminated, reverses the polarity (180 degree inversion) of all input signals, including the DI, mic input, and line input. (4) TRANSFORMER SELECT SWITCH "XFMR IN" A pushbutton switch which, when depressed and illuminated, places the Millennia MIT-01 audio path transformer in the front-end circuit.
PARAMETRIC EQUALIZER SECTION (9) BAND IN/OUT SWITCH "IN" Pushbutton switch which places its associated EQ band in circuit or out of circuit. There are four bands of equalization on the STT-1 Origin. The four frequency bands are labeled LF (low frequencies), LM (low-mid frequencies [20 Hz - 2.5 kHz]), HM (high-mid frequencies [250 Hz - 25 kHz]), and HF (high frequencies). An EQ band is in circuit when its associated band switch is depressed and LED is illuminated.
T IN REV IN POL O XFMR INST LINE MIC IN +48V SOURCE SS IN INPUT TT VT OUT OL 50 dB SOLID STATE GAIN 40 dB VACUUM TUBE GAIN UMEN STR T IN 34 15 20 0 180 270 100 56 LF 15 IN 0 15 4.0 Q 0.4 15 X10 0.6 0 15 4.0 2.5k Q 2.1k 1.0 300 250 IN 1.4k 1.6k 1.2k HM 400 900 0.4 15 5.8k 4.8k 0.6 0 16k 21k 10k 8.0k HF 15 IN IN SS IN OFF DE-ESSER 4.9k 2.0 +20 RATIO METER GR 30:1 15:1 1.4:1 COMP +LIM OUTPUT MUTE 20:1 9:1 3.
(16) EQUALIZER IN/OUT SELECT SWITCH "EQ IN" Pushbutton switch which places the single (yes, only one) active EQ amplifier in the signal path. Because of this equalizer's unique design, the four bands of active filters are not technically 'in' the direct audio signal path. Rather, the filter bands exist within the shunt network of a single audio amplifier.
(21) RATIO CONTROL "RATIO" Conductive plastic rotary potentiometer offering continuously variable compression ratio. When fully CCW, the lowest and most gentle compression ratio is achieved (1.4:1). When fully CW, the highest and most pronounced compression ratio is achieved (30:1). A compression ratio of approximately 10:1 or higher is typically called "limiting" hence the STT-1 dynamics section is properly called a "compressor/limiter.
(24) DYNAMICS IN/OUT SWITCH "COMP + LIM IN" Pushbutton switch which places an opto-compressor/limiter into the signal path. When switch is depressed and LED is illuminated, opto-electronic gain reduction elements are activated. When pushbutton switch is not depressed, gain reduction is not in circuit. Opto-compressor/limiter can be used with or without additional active amplifier stage (vacuum tube or solid-state).
COMPRESSOR T/T OPERATION Please review the STT-1 block diagram. You'll note that the opto-compressor gain reduction "shunt" elements, both pre-EQ and post-EQ, are passive. This means that no additional audio path amplifiers are required for dynamics control, though an additional 10 dB of "make up gain" can be achieved via the master output buffer amplifiers if required. In some cases, the sound of an additional Class-A biased amplifier in the dynamics signal path may be preferred.
1/4“ PHONE XLR LINK DYNAMICS OUT BAL OUT UNBAL OUT PHONO RCA XLR MALE +25V -25V +48V +350V +5V +12V +18V -18V AMPLIFIER SOLID-STATE AMPLIFIER SOLID-STATE DISCRETE MUTE VU METER LEVEL/GR AMPLIFIER SOLID-STATE MONOLITHIC 50V FSA-01 350V 50V MONOLITHIC 50V INTERNAL DC POWER PHONE XLR 2 1/4“ MALE 2 XLR MALE 2 JACK (front panel) INPUT SELECT (ROTARY) PHANTOM AMPLIFIER TUBE VACUUM 12AT7 +48V Phantom FEMALE 2 XLR FEMALE 2 1/4“ PHONE IN DI DIRECT STT
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, .
EQUALIZER SPECIFICATIONS Maximum Boost & Cut Parametric "Q" Adjustment Range Low-Mid (LM) Parametric Sweep Freqs High-Mid (HM) Parametric Sweep Freqs Low (LF) Range Fixed Frequencies High (HF) Range Fixed Frequencies Low/High Range Fixed "Q" Parametric Frequency Multiplier (10X?) Peak/Shelf Selection on Hi & Lo bands? Bypass Selection on Each Band? Twin Topology Selection +/- 15 dB (21 step detent) Q = 0.4 to 4.0, sweepable 20 Hz to 220 Hz -or- 200 Hz to 2.2 kHz 250 Hz to 2.
WARRANTY Millennia Media will repair this product, free of charge, in the USA, in the event of defect of materials or workmanship for one (1) year following date of purchase. This warranty is extended only to the original purchaser. This limited warranty covers failures due only to defects in materials and workmanship which occur during normal, intended use and does not cover damage which occurs in shipment or failures which are caused by products not supplied by Millennia Media.