Editing Pioneer A-858

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== Short description ==
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== Daten ==
Amplifier derived from the A-757 (and thus from the A-717) with even larger transformers and even more power in an oversized cabinet, successor of the A-88X, very similar to the analog section of the A-90D/A-91D. However, only introduced at the same time as the A-757 and A-656, therefore smaller knobs already made of plastic and plugged instead of screwed.
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{{Navigation}}
== Data ==
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'''Allgemein'''
{{navigation}}
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* Hersteller: Pioneer
'''General'''
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* Modell: A-858
* Manufacturer: [[Pioneer]]
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* Baujahre:
* Model: A-858
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* Hergestellt in:
* Type: Integrated amplifier
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* Farbe: schwarz
* Years of manufacture: 1989 - 1991
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* Typ: (Digital/Analog)
* Made in: Japan
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* Fernbedienung:
* Color: Black
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* Leistungsaufnahme:
* Power consumption: 1000W (max)
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* Abmessungen: 42cm x 17,2cm x 47,4cm (BxHxT)
* Dimensions: 420 x 172 x 474 mm (WxHxD)
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* Gewicht: 24,5 kg
* Weight: 24,5 kg
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* Neupreis ca.:
* Original price approx.: 1'500 DM
 
  
  
'''Connections'''
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'''Anschlüsse'''
* Number of inputs: 8
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* Anzahl der Eingänge: 8
 
** Phono
 
** Phono
 
** Tuner
 
** Tuner
CD/DVD
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** CD/DVD
 
** Line/Aux
 
** Line/Aux
** Tape-1/DAT
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** Tape/MD/DAT-1
** Tape-2
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** Tape/MD/DAT-2
** Tape-3
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** Tape/MD/DAT-3
 
** Adaptor In-Out / Pre-Out
 
** Adaptor In-Out / Pre-Out
Number of outputs:
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* Anzahl der Ausgänge:
** list the outputs here (with level/impedance).
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** hier die Ausgänge aufzählen (mit Pegel/Impedanz)
  
  
'''Technical Data'''
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'''Technische Daten'''
* Continuous power (with distortion factor)  
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* Dauerleistung (bei Klirrfaktor)
** 8 Ohm: 2 x 105 W / 0,03%
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** 8 Ohm: 2 x 120 Watt
** 4 Ohm: 2 x 160 W / 0,05%
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** 4 Ohm: 2 x 180 Watt
* Dynamic power
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** 2 Ohm: 2 x 350 Watt < 0,1% Klirrfaktor
** 4 Ohm: 2 x 230 W
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* Dynamikleistung
** 2 Ohm: 2 x 350 W
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** 8 Ohm:  
* Total harmonic distortion: 0.03%
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** 4 Ohm:  
* Attenuation factor 1kHz/20Hz ~ 20kHz, 8 Ohm: 200/70
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** 2 Ohm:
* Bandwidth power 0,05%, 8 Ohm: 5 - 60.000 Hz
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* Gesamtklirrfaktor:
* Signal-to-noise ratio phono MM: 74dB
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* Dämpfungsfaktor:
* Signal-to-noise ratio CD, Tuner, Line, Tape: 92dB
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* Frequenzgang:
* Stereo channel separation:
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* Signalrauschabstand:
* Tone control:
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* Stereokanaltrennung:
** Bass: +-8dB (100Hz)
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* Klangregelung:
Treble: +-8dB (10kHz)
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** Bass:
* Loudness: Yes, Volume button -40dB position +5dB(100Hz) +3dB(10kHz).
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** Höhen:
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* Loudness:
 
* High Filter:
 
* High Filter:
* Low Filter (Subsonic): Yes, key 17Hz (12db/oct.)
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* Low Filter (Subsonic):
* Mute: Yes, button
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* Mute:
* Direct/Line-Straight: Yes
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* Direct/Line-Straight:
  
  
'''Special Features'''
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'''Besondere Ausstattungen'''
* Elaborate and solid workmanship
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* hier, wenn vorhanden
* Extremely high output power (immense current stability)
 
* Adapter loop (through bridge plug on the back)
 
* Direct switch: for direct connection to the volume control
 
* Phono switch for MM and MC cartridges + subsonic
 
* Transformers in solid cast housings to protect against resonance and magnetic interference
 
* Honeycomb-ribbed chassis and honeycomb-structured heat sink (resonance and vibration damping)
 
* Robust power supply for stable supply during peak loads
 
* Spatially separated stages, therefore elimination of mutual interference
 
* Gold-plated connectors for phono and CD
 
  
  
== Remarks ==
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== Bemerkungen ==
* Previous model:
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Weitere Modelle der gleichen Serie:
* [[Pioneer A-88X]]
 
  
  
* Successor model:
 
* [[Pioneer A-878]]
 
  
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glasklarer und dynamischer Klang
  
* Other models in the same series:
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sehr aufwendige und solide Verarbeitung
*[[Pioneer A-227]]
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extrem hohe Ausgangsleistung (immense Stromfestigkeit)
*[[Pioneer A-337]]
 
*[[Pioneer A-447]]
 
*[[Pioneer A-656 MK II]]
 
*[[Pioneer A-757 MK II]]
 
*[[Pioneer A-858]]
 
  
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ordentliches Subsonic-Filter
  
== Pictures ==
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sehr gutes Rauschverhalten bei Hochpegel und Phono Eingangsteil
*[[Image: Pioneer A-858
 
[[Image:Pioneer A858.jpg]]
 
  
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geringes Übersprechen zwischen den Eingängen
  
== Reports ==
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sehr wirksame Loudness-Schaltung
  
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auftrennbare Vor- und Enstufe (durch Brückenstecker an der Rückseite)
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Anschlüsse für 2 Lautsprecherpaare (auch für dicke Querschnitte)
  
== Links ==
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Direct Schalter: Für direktes Durchstellen an die Lautstärkereglung
  
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Mute Schaltung
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Phono Schalter für MM und MC Tonabnehmer + Subsonic
  
[[Category:Integrated amplifier]]
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Phono Vor-vorverstärker (zuschaltbar)
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getrennte Spannungs- und Leistungsverstärkung
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Transformatoren in massiven Gußgehäusen zum Schutz vor Resonanzen und magnetischer Interferenzen
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Wabenrippenverstärktes Chassis und wabenstrukturierter Kühlkörper (Resonanz und vibrationsdämpfend)
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Robustes Netzteil für stabile Versorgung bei Lastspitzen
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räumlich getrennte Stufen, daher Wegfall gegenseitiger Interferenzen
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vergoldete Anschlußbuchsen für Phono und CD
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Kopfhörer-Klinkenausgang an der Frontseite
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===Bilder===
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[[Bild:Pioneer A858.jpg]]

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