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Marantz Model 9 Amplifier

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Front View

Front View
Image Attribution: Yuri Titkov
Date: June 17th, 1999

Front panel sans cover
EBay Auction #1211610849
Date: January 31, 2001

Rear View
Image Attribution: Yuri Titkov
Date: June 17th, 1999

Rear View, cage on
EBay Auction #1211610849
Date: January 31, 2001

EBay Auction #1211610849
Date: January 31, 2001

Peeking from the packing…
EBay Auction #1211610849
Date: January 31, 2001

What more could you ask for?
EBay Auction #1211610849
Date: January 31, 2001


There are two slight variations in the Model 9. After the first 520 or so there is a change to the output transformer, and a few related changes to the feedback circuitry

Contributed by Kevin M. Hayes
On February 1st, 2000


Retail Price780
Designed inUSA
Manufactured InUSA
First Year1960
Years Manufactured1960-1968
Last Year1968
ChannelsOne (mono)
Tube DesignYes
Tube Count7
Diode Count6
Speaker ConnectionsOne set
AC SwitchYes
Fusing3a Slowblow, front panel
Power Source DetailsStandard, potted transformer
Power Consumption250 watts
Special Option 170.7V option for commercial inst. no 4 ohm tap

Width15 3/8
Height8 1/4
Depth10 1/2
Weight60 lbs (shipping wt)

RMS Power Per Channel70, or 40 in Triode operation
Damping Factor @ Load Impedance>20
Total Harmonic Distortion (THD)<0.1%
Frequency Response0.1dB 20 Hz to 20 KHz and 1 dB 12 Hz to 40 KHz
Hum and Noise>90 dB below 70 watts
Signal to Noise Ratio90 dB
Intermodulation Distortion (IM)<0.5%
Gain Control(s)Yes
DC CapableNo
Meter RangeFull mode selection
Peak Lamp(s)No
Overload Lamp(s)No
Output Meter(s)Yes
Cooling Fan(s)No
Auxillary MeteringDC+AC Bal, V5-V8 bias
Output Impedance(s)4, 8 and 16 ohms, + 1 ohm tap for ctr spkr (except 9-970, no 4 ohms.)

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