MalValve
HighEndHifi
D. Mallach
Towersgarten 11
45229 Essen
Germany
+49-(0)201-408084
Email: info@malvalve.de
Preamp Three Phono Mk7Vollsymmetrischer Röhrenvorverstärker
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Schaltung * Aufbau
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Steckverbinder
· vergoldete Cinchbuchsen
· vergodete XLR-Steckadapter
· vergoldete 2 mm-Buchsen (ground)
· Kaltgerätestecker
Rückwandschalter
· Kippschalter für symmetrischen oder asymmetrischen Phono 1-Eingang
· Kippschalter für symmetrischen oder asymmetrischen Phono 2-Eingang
· Kippschalter für symmetrischen oder asymmetrischen Ausgang
Anschlüsse * Daten |
Phono 1 + 2 Phono 1 + 2 100 - 800 Ohm 10 - 100 kOhm 0,1 - 0,2 - 0,4 mV 1 mV 22 µs - 83 µs Preamp Out Preamp Out < 100 Ohm 2 Veff. < 0,1 % 10 - 60.000 Hz > 70 dB (A) > 80 dB (A) 90 - 250 VAC, 50 - 60 Hz 80 Watt 0,3 Watt |
Gehäuse |
· Abmessungen: · Gewicht: |
483 mm (b) x 315 mm (t) x 100 mm (h) 12 Kg |
Design * Construction
· full tube construction in the signal path
· MC- and MM-operation
· low-noise phono-input-stage
· passive RIAA pre-emphasis correction
· RiAA phono de-emphasis stepwise switchable
· switchable input-impedances for MC- and MM-operation
· three-step MC-adjustment by switchable transformation ratio
· balancing of unbalanced inputsignals
· full balanced signalprocessing in all operation and connection modes
· pure class A-operation
· equal balanced-unbalanced In-/outputs because of transformer technique
· galvanic isolation by input-/outputtransformercoupling
· modular concept
· all switching procedures relay-controlled
· processor-controlled and thereby flexible switching functions
· switch mode power supply for all operation voltages
· on-off muting
Frontpannel rotary step switches
· phono 1 = MM, MC 1 - 3
· phono 2 = MM, MC 1 - 3
· mode for RIAA de-emphasis
· impedance for Phono 1
· impedance for Phono 2
· on to switch on and off
LEDs · front right |
red/green red middle red left red left red middle red right red all |
operation phono 2 phono 1 MC 1:5 MC 1:10 MC 1:20 MM |
Features
· 2 x ECC 808-tubes
· 6 x ECC 81-tubes
· 4 x ECC 88-tubes
· 2 x MC-transformer mit MU-metal-shielding
· 2 x MM-transformer mit MU-metal-shielding
· 2 x output transformer mit MU-metal-shielding
· 7 x Schaltungssteckmodule
· internal switch mode power supply 150 VA
· powercable (2 m)
Connectors
· gold platted cinchsockets
· gold plated XLR-connectors
· gold plated 2 mm-sockets (ground)
· power supply connector
Rearpannel switches
· toggle switch for balanced or unbalanced Phono 1-Input
· toggle switch for balanced or unbalanced Phono 2-Input
· toggle switch for balanced or unbalanced Output
Case
· 15 mm complete aluminium frontplate brushed and black or natur anodized
· brushed and black or natur anodized complete aluminium case
· brass buttons and productbadge highgloss finished uand chome plated
· dimensions: 483 mm (w) x 315 mm (d) x 100 mm (h)
· Gewicht: 12 Kg
Specifications · balanced Inputs · unbalanced inputs · input impedance MC · input impedance MM · input sensitivity MC · input sensitivity MM · phono RIAA de-emphasis · balanced outputs · unbalanced outputs · output impedance · output voltage · harmonic distortion · frequency response · signal to niose distance MC · signal to niose distance MM · supply voltage · power consumption · standby |
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