Manual

Front Panel

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Hi-Z - Selects the input signal arriving at the front panel unbalanced ¼" jack Hi-Z

connection. ( see #5 on page 4) Intended for the direct connection of electric guitar,

electric bass, or any instrument with a magnetic or acoustic transducer pickup, this can be

set to either 47K ohms or 2.2M ohms. The 47K ohms setting is best suited for the -10 dBv

level signals typically provided by active basses and guitars, while the 2.2M ohms setting is

more suitable for instruments with passive pickup systems. Since a particular instrument’s

output impedance may actually be somewhere between the active and passive levels, feel

free to experiment to achieve the best sound at the desired level. ( see page 26 for more

information)

(3) -15 dB PAD - Reduces the mic input signal by -15dB. (This switch has no effect on Line or Hi-Z

signal.) Use this to reduce the incoming signal in cases where undesired distortion is present at low

gain levels (for instance, where especially sensitive microphones are used on loud instruments).

(4) Polarity - Determines the polarity of the 6176’s Preamp LINE OUTPUT. ( see #5 on page 9)

When IN ø is selected, the signal is in phase, and pin 2 is hot (positive). When OUT ø is selected, the

signal is out of phase, and pin 3 is hot (positive). Polarity reversal may be useful in cases where

more than one microphone is utilized in recording a source.

(5) Hi-Z Input - Connect high impedance signal from an instrument such as electric guitar or bass to

this standard unbalanced ¼" jack connector. If a connection is made to the Hi-Z input, be sure that

there is no connection also made to the Mic or Line inputs.

(6) Level - Determines the amount of signal sent to the Preamp output stage. For the cleanest, most

uncolored signal from the 6176, set the Gain switch ( see #1 on page 3) to a low setting (-10 or -

5) while turning the Level knob until the appropriate output signal is attained.

(7) High Frequency - Selects the corner frequency for the high shelving filter. Available frequencies

are 4.5K (kHz), 7K (kHz), and 10K (kHz).

 The numeric values for the Level knob are NOT specific dB values.

 You can come up with many useful tonal variations by experimenting with different

Impedance, Gain, and Level settings.

 Make only one type of connection (Mic, Line, or Hi-Z) to the 6176 .