Front panel – Manley Neo-Classic 300B Preamplifier 2002 - 2008 User Manual

Page 6

A - INPUT SELECT - 5 Position switch for input selection. Each input is electrically
identical. The RECORD OUT directly follows this switch. There is no buffer amp to isolate
the effects of loading and cable capacitance so we recommend disconnecting any
interconnect cables from the RECORD OUT if you are not recording.

B & C - HEADPHONE JACKS - Standard 1/4" stereo headphone jacks. The
HEADPHONE IMPEDANCE SWITCH (on top of the unit) should be set for the range that
best matches your headphones. The maximum power output primarily depends on the actual
headphone impedance. Typically the preamp can deliver 1 watt (10 volts RMS ) into 100
ohms and 1 watt (25 volts RMS) into 600 ohms. These outputs are transformer coupled for
highest possible isolation from shock hazards, cable shorts, and other potential problems.

D - VOLUME - Audiophile-grade Noble pot.

E - BACKLIT PANEL - This is the power indicator. When it is lit-up, your unit is on. When
it is not lit-up, your unit is off.

F - POWER SWITCH - Self explanatory. Because tubes require some time to warm up
there is about 10 seconds of silence followed by "not-so-good sound" before "wow". The best
way to power up the system is sources ( CD, turntable, etc) first, then this preamp, then after
a 30 second wait - turn on the amplifiers. Wait a minute or so - then play tunes. This allows
everything to warm up. Some people hear a difference after an hour or two but it depends on
the equipment. Powering down is the opposite order - power amps first. This procedure is a
good habit to follow because it stresses the speakers and ears the least.

The power supply in this preamp is tube based which has the inherant advantage of

slow start (as the tubes warm up). This gives the least stress to the internal components.

AUX

TAPE

TUNER

VIDEO

HEADPHONES

VOLUME

OFF ON

A B C D E F

FRONT PANEL