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10th October 2010, 08:39 PM
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#1 |
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diyAudio Member
Join Date: Jul 2005
Location: D-55629 Schwarzerden
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Threshold Amplifier - Overview and Schematic Collection of all Models
A friend of me will start a collection of all exist Threshold models - at least of all exist power amplifiers.
This brings me to the idea, to start this thread with an information collection with a listing of (first only all me known) models and miscelaneous parts/PCB's. please help me to complete this list - there are probably missing a few models, especially the universal PCB names of various modules and special/custom made parts used in various amp models (eg front-end, VU-Meter PCB).Thank you therefore. In the next time I will also redrawn those circuit diagrams, where the original schematic documents are difficult to read. Most listed models I have found about Threshold-Audio.com First Series: 800A 200 Watt/Channel STASIS Stereo Power Amplifier (1975-77) 800S ???? unknown 400A 100 Watt/Channel STASIS Stereo Power Amplifier (1976-79) 4000 200 Watt/Channel STASIS Stereo Power Amplifier (1977-79, successor 400A) 800A Schematic Threshold 800A and 800S Threshold 800A Help! Threshold 800A and other old models: Mospec 2N5876/2N5878 or ON MJ21193/MJ21194 ? Threshold 800A assistance 400A or Stasis 3? Threshold 400 a Threshold 400 A Buying a 400A Would this work with a 400a? Threshold 400A HELP !! Threshold 4000 Threshold! (4000 vs 800A) Threshold (4000 400A CAS1) Elettronica audio - (a cura di Piercarlo Boletti): QUAD 405 - 2 - Seconda parte (800A - high resolution schema, scroll down) Threshold 400a Parts Substitution & Mods. Threshold 400A Power supply help AudiogoN Reviews: Threshold 400a Amplifier (photo) Cascode Amplifier (CAS) Series (Emitter Cascode Follower as Power Buffer) CAS-1 75 Watt/Channel STASIS Stereo Power Amplifier (1979-81) CAS-2 125 Watt/Channel STASIS Stereo Power Amplifier (1979-81) THRESHOLD CAS-2 poweramp. Threshold CAS 1 Threshold (4000 400A CAS1) Stasis-Series: STASIS-1 200 Watt STASIS MonoBlock Power Amplifier (1979-81) STASIS-2 200 Watt/Channel STASIS Stereo Power Amplifier (1979-81) STASIS-3 125 Watt/Channel STASIS Stereo Power Amplifier (1979-81) SA-1 160 Watt STASIS MonoBlock Power Amplifier (1984-88) SA-2 100 Watt STASIS MonoBlock Power Amplifier (1984-88) SA-3 50 Watt/Channel STASIS Stereo Power Amplifier (1984-88) S/150 (two series) 75 Watt/Channel STASIS Stereo Power Amplifier (1982-84) S/200 (two series) 100 Watt/Channel STASIS Stereo Power Amplifier (1984-86) S/300 (two series) 150 Watt/Channel STASIS Stereo Power Amplifier (1983-88) S/500 (two series) 250 Watt/Channel STASIS Stereo Power Amplifier (1983-88) S/1000 (two series) 500 Watt STASIS MonoBlock Power Amplifier (1984-88) SA/3.9e 60 Watt/Channel STASIS Stereo Power Amplifier (1990-94) SA/4e 100 Watt/Channel STASIS Stereo Power Amplifier (1989-95) SA/6e 125 Watt STASIS MonoBlock Power Amplifier (1990-94) SA/10e 175 Watt STASIS MonoBlock Power Amplifier (1990-94) SA/12e 250 Watt STASIS MonoBlock Power Amplifier (1989-95) stasis 2 and 3 schematics STASIS 2 problem Stasis One Meter Threshold Stasis 2. Threshold Stasis 2. threshold stasis 2 Threshold Stasis Model 3 Another Threshold Stasis 2 rebuild Threshold Stasis 3, too Stasis 3 Power Transistors Threshold S/200 Threshold SA/ and SA/e series monoblocks Stereophile: Threshold SA-1 monoblock power amplifier (SA-1) Schematic and help with Threshold SA/4 (post #34: Instruction for bias adjust) Threshold's New-Owner Series: T 50 50 Watt/Channel Stereo Power Amplifier (1994-98) T 100 60 Watt/Channel Stereo Power Amplifier (1994-98) T 200 100 Watt/Channel Stereo Power Amplifier (1994-98) T 400 150 Watt/Channel Stereo Power Amplifier (1994-98) T 800 and T 800D 200 Watt/Channel Stereo Power Amplifier (1996-98) TA-300 150 Watt/Channel Stereo Power Amplifier (1993) S/160 80 Watt/Channel STASIS Stereo Power Amplifier (1992-94) S/250 125 Watt/Channel STASIS Stereo Power Amplifier (1992-94) S/350e 150 Watt/Channel STASIS Stereo Power Amplifier (1990-94) S/450e 200 Watt/Channel STASIS Stereo Power Amplifier (1990-94) S/550e 250 Watt/Channel STASIS Stereo Power Amplifier (1990-94) S/1600 750 Watt STASIS MonoBlock Power Amplifier (1989-1994) Threshold SA/2 SA/3 Soderburg site? Biasproblems in Threshold SA/1 Schematics Threshold Series I or II Threshold S/1000 Series II Help! Schematic Threshold S/1000 Series II threshold sa 50? diyAudio Unknown models: 500 ??? 500/II ??? Threshold 500II maybe SA-500 and Stasis 500 MK-II ?? not mentioned power amplifier models about Threshold-Audio.com but mentioned about http://www.audiopathways.com/Threshold.htm preamp Stasis R 3.0 and 5.0 integrated Amp: Dragon V 5ch Power Amp: S-3500-E Stereo Power Amp: Stasis 7.0 - Stasis 8.0 - S-5000-E MonoBlock S-7000-E Upgrade Kits: ???? ........................please let me know more, whether there are such kits or not. PCBs and special parts for various models: various protection unit's: PCB part No 254-6000 Front end modules (FE-89, FE90), Universal FEB, Universal Error Correction PCB Universal LED Driver PCB for VU Light Band Displays (multi element bar graph array) e. g. Electronics-Lab.com Blog VU meter PCB for VU Light Band LED Display (multi element bar graph array) VU Light Band VFD (Vakuum Fluoreszenz)-PCB Analogue VU Moving Coil Panel Peak Indicator Meter ....................please let me know all the existing things - I have only found that from the attachement Stereo Line + RIAA Preamplifier NS-10 Stereo Preamplifier (1977-79) Threshold NS-10 and M1 info. wanted Threshold NS10 Lineamp PCB SL-10 Stereo Preamplifier (1979-81) Threshold sl-10? threshold sl10 threshold sl-10 FET-1 (two series) Stereo Preamplifier (1981-85) Threshold FET1 FET-2 (two series) Stereo Preamplifier (1981-85) FET-9 Stereo Preamplifier with Phone Stage (1986-89) FET-10Pc Stereo Phone Gain Stage (1986-89) FET-10HL Stereo High Level Preamplifier (1986-89) FET-9e Stereo Preamplifier with Phone Stage (1990-94) FET-10Pe Stereo Phone Gain Stage (1990-98) FET-10He Stereo High Level Preamplifier (1990-94) Threshold FET/10 He Service Manual Threshold Fet 10/hl Opinion ? Threshold fet ten/pc schematics T 2 Remote Control Stereo Preamplifier (1994-98) T 3/T 3i Remote Control Stereo Preamplifier (1994-98) crossover/DAC PCX (-X10) Stereo Electronic Crossover (1987-89) DAC1e Digital to Analog Convertor (1992-96) DAC2 Digital to Analog Convertor (1995-98) various URL's concerning Threshold devices: Threshold Lovers - Threshold - Product line history archiveamps Stammtisch für HiFi- und Musik-Freunde | PASS LABS | Threshold By Threshold history site not mentioned models: e.g. Stasis R-3.0 - Stasis R-5.0 - T Zero Threshold Audo from AudioPathic Last edited by tiefbassuebertr; 10th October 2010 at 08:51 PM. |
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11th October 2010, 01:04 AM
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#2 |
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diyAudio Member
Join Date: Jul 2005
Location: D-55629 Schwarzerden
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Threshold 800A various schemas and pics
Threshold 800A various schemas and pics and two URLs
http://www.affordableaudio.org/Threshold800A.pdf http://cgim.audiogon.com/cgi-bin/src...threshold+800a Last edited by tiefbassuebertr; 11th October 2010 at 01:20 AM. |
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11th October 2010, 01:08 AM
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#3 |
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diyAudio Member
Join Date: Jul 2005
Location: D-55629 Schwarzerden
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Threshold 400A various schemas and pics
Last edited by tiefbassuebertr; 11th October 2010 at 01:29 AM. |
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11th October 2010, 01:16 AM
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#4 |
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diyAudio Member
Join Date: Jul 2005
Location: D-55629 Schwarzerden
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Threshold 4000 various schemas and pics
Threshold 4000 various schemas and pics
Threshold 4000 http://www.avsforum.com/avs-vb/showt...php?p=19273750 Last edited by tiefbassuebertr; 11th October 2010 at 01:24 AM. |
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11th October 2010, 10:06 AM
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#5 |
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diyAudio Member
Join Date: Jul 2005
Location: D-55629 Schwarzerden
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Mooved Schematic Archive from www_passlabs_com
This website was several time updated in the last ten years.
Where are presently to find follow archive sites: Index of /np Index of /np Index of /np time overview: Internet Archive Wayback Machine Thank you for your advices. In the attachement the pdf file from previous post "Threshold 4000 and 400A PCB NO 053-0308.pdf" as tif-download and follow new pdf create - a bit better resolution Last edited by tiefbassuebertr; 11th October 2010 at 10:23 AM. |
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11th October 2010, 11:40 AM
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#6 |
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diyAudio Member
Join Date: Jul 2005
Location: D-55629 Schwarzerden
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Threshold CAS Series - various schemas and pics
Threshold "CAS" series - various schemas and pics
CAS1 (CAS-1): schematics here: Threshold CAS 1 (post #10) THRESHOLD CAS-2 poweramp. (post #4 and #6) CAS2 (CAS-2): no schematics I have found, also not from the LED VU-Peak Level meter therefore. AudiogoN Forums: Review: Threshold CAS-2 Amplifier I don't find complete detailled schematics about the CAS2 (CAS-2) online. Who can post that? Last edited by tiefbassuebertr; 11th October 2010 at 11:45 AM. |
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28th October 2010, 08:25 AM
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#8 |
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diyAudio Member
Join Date: Jan 2003
Location: ancient Batsch , behind Iron Curtain
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you'll do great favor to community if you scan them
I'm willing to help in any way , but - I'm too far for scanning them , but I can host scans if they are large maybe you can send them to some other USA based DIYa for scanning
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my Papa is smarter than your Nelson ! tnx to  clean  thread ; Cook Book ; PSM LS Cook Book ; Baby Diyaudio FORUM ; BAF Forum & Gallery;I'm dumb
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28th October 2010, 01:01 PM
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#9 |
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diyAudio Member
Join Date: Jul 2005
Location: D-55629 Schwarzerden
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Who knows, where I can get detailled complete schematic from the 800A - only the power amp section I can find, but no schematics of front end (integrated pre-amp section), switch-on unit (non-contact switching resp. sensor-aera therefore) and power supplies/voltage regulators.
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