SPECIFICATIONS

POWER AMP SECTION

Rated Power & Load:

15 W RMS into 4 ohms

Power @ Clipping: (Typically)

(5% THD, 1 kHz, 120 V AC line)

15 W RMS into 4 ohms

Total Harmonic Distortion:

Less than OS%, 100 mW to IO W RMS, 60 Hz to 10 kHz, 4 ohms (typically below 0.2%)

Power Consumption:

40W, 50/60 Hz, 120 V AC

PREAMP SECTION

The following specs are measured

@2 kHz with the controls preset as follows:

Channel Select Normal (Out) Low&High@ 10

Mid @ 0

Pre Gain & Post Gain @ 10 Reverb @ 0

Nominal Levels are with Normal Gain @ 5

Minimum Levels are with Normal Gain @ 10

Preamp Input: (Normal channel)

Impedance: High Z, 1 M ohm

Nominal Input Level: -6 dBV, 500 mV RMS

Minimum Input Level: -23 dBV, 70 mV RMS

Maximum Input Level: 0 dBV,

I VRMS

CD/Tape Input:

Input Impedance: 100 K ohms

Nominal Input Level: .5 V RMS, -6 dBV

(Stereo jack designed for use with stereo headphone outputs on CD/tape players)

Headphone Output:

Load Impedance: 4 ohms or greater

Nominal Power Output: 20 mW into

4ohms

(Stereo jack, monaural signal, disconnects internal speaker when phone plug is inserted)

System Hum & Noise

@ Nominal Input Level:

(20 Hz to 20 kHz unweighted)

62 dB below rated power

Equalization:

Special low, mid, & high passive type EQ

BLOCK DIAGRAM

 

 

 

 

 

 

HIGH GAIN

 

 

 

 

LEAD

AMP

 

 

 

 

 

 

POST

 

 

 

 

 

 

 

 

 

 

I

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

%

INPUT

SWITCH

 

 

PRE GAIN

LOGIC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PRE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CLEAN

CD/TAPE

INPUT

1

TONE

 

 

 

 

:::.

4 OHM

 

,oe

-

 

 

 

 

 

SPEAKER

 

 

 

 

 

 

 

 

LO MID HI

 

PWR

 

 

 

 

 

 

 

 

 

 

 

 

AMP

 

 

 

 

 

 

 

 

 

 

HEADPHONE

This block diagram shows signal flow within the unit. In order to thoroughly understand the unit’s functions, please study the block diagram carefully.

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Image 5
Peavey 158 manual Block Diagram