Bronco front panel functions – Fender Bronco Amp PR258 User Manual
Page 3
 
A. INPUT
—
A high impedance, high sensitivity plug-in
connection for instruments.
B.
NORMAL VOLUME —
Adjusts the overall loudness of the
Normal Channel.
C. GAIN
—
Adjusts the amount of preamp amplification in the
Drive Channel. Cleaner sound is achieved at lower gain 
settings; high gain settings will produce more sustain and 
distortion. This control works in conjunction with the 
DRIVE
VOLUME control (item E) to set the overall loudness of the 
Drive Channel.
D. DRIVE SELECT —
Activates the
Drive Channel.
E.
DRIVE VOLUME —
Adjusts the overall loudness of the Drive
Channel.
F.
TREBLE —
Adjusts the amount of boost or cut in the high
frequency range.
G. MIDDLE
—
Adjusts the overall tone quality without affecting
the signal level. High
MIDDLE settings will provide emphasis
in the midrange frequencies whereas a lower setting will 
notch the midrange to produce sounds characteristic of most 
“metal” music.
H. BASS
—
Adjusts the amount of boost or cut in the low
frequency range.
I.
POWER INDICATOR ––
When this indicator is illuminated the
Bronco is receiving AC power.
J.
POWER SWITCH —
This switch turns the AC power
ON and
OFF. When the switch is OFF the amplifier is completely shut 
down.
K. HEADPHONES
—
This jack provides an output to standard
stereo or mono headphones for private listening. NOTE: Use 
of this jack automatically disables the speaker. CAUTION: 
Prolonged listening at high levels may be hazardous to your 
hearing! This jack can also be used as an unbalanced line 
output by using either a stereo or mono 1/4 inch phone plug 
connection.
L.
EXTERNAL SPEAKER ––
This jack provides an output to an
external speaker enclosure. The enclosure must have a 
minimum impedance of 8
Ω
. Use of this jack automatically
disables the internal speaker. DO NOT PLUG HEAD 
PHONES IN HERE.
LINE CORD ––
This amplifier is equipped with a grounding type
supply cord to reduce the possibility of shock hazard. Be sure to
connect it to a grounded receptacle. DO NOT ALTER THE AC
PLUG.
INPUT
1
12
2
11
3
10
4
9
5
8
6 7
NORMAL
VOLUME
1
12
2
11
3
10
4
9
5
8
6 7
GAIN
DRIVE
SELECT
1
12
2
11
3
10
4
9
5
8
6 7
DRIVE
VOLUME
1
12
2
11
3
10
4
9
5
8
6 7
TREBLE
1
12
2
11
3
10
4
9
5
8
6 7
MIDDLE
1
12
2
11
3
10
4
9
5
8
6 7
BASS
A
B
C
D
E
F
G
H
I
Bronco Front Panel Functions
8
Ω
MIN. EXT.
SPEAKER