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14. FUSE:This protects the unit from damage due
to overload conditions or power line surges. If the
fuse blows, replace it only with the same size and type.
15. AC LINE IN: Firmly insert the supplied AC
power cord into this socket until it is fully seated. Plug the male end of the cord into a grounded AC
outlet. DO NOT DEFEAT THE GROUND PRONG
OF THE AC PLUG!
16. PREAMP OUT:This jack carries the post-
Master (10) signal. Using this jack does not break
the path to the power amp. This signal can be used to feed an external power amplifier, mixing console or house PA system. 17. POWER AMP IN:
This jack accepts a signal to
be sent to the power amp and the Slave Out jack
(18). Using this jack breaks the path from the sig -
nal that was present at the Preamp Out jack (16). This can be used as a post-Master (10) patch
point.
18. SLAVE OUT: This jack receives the same sig-
nal that is being sent to the power amp. It is useful
for powering another amp (slave) from this unit s
preamp. It can also be used as an unbalanced
version of the Balanced Out (19) signal.
19. BALANCED OUT :This XLR jack is the pre -
amp output. Thus, it will include any processing done in the Preamp Out/Power Amp loop (16,17).
This signal can be used to feed an external power amplifier, mixing console or house PA system. 20. PRESENCE SWITCH:
When this switch is
depressed a high frequency boost is added to the
output signal. This helps compensate for a speak -
er cabinet with no high frequency driver, adding a glassy top end to the sound.
21. SPEAKER OUT: Two 1/4 phone jacks are pro -
vided for connecting speakers to the unit. These
jacks are wired in parallel. Use the jack on the right
(Main) first. The jack on the left should only beused to connect a second speaker cabinet.
22. IMPEDANCE SELECTOR: Use this switch to
match the output impedance of the amp to the
speaker(s) being used (4 or 8 ohms).
Technical Specifications:
OUTPUT POWER RATING 100 watts RMS minimum continuous @ <3% THDinto 4 or 8W, 0.7VRMSinput
TOTAL SYSTEM GAIN 59dB @ 1kHz with levels up and tones flat, -3dB @ 30Hz and 12kHz
TONE CONTROL RANGE
BASS: ±12dB @ 40Hz
MIDRANGE: +10dB, -20dB @ 220, 450, 800, 1.6k or 3kHz
TREBLE: +15dB, -20dB @ 4kHz
ULTRA LOW: +2dB @ 40Hz, -10dB @ 500Hz
ULTRA HIGH: +9dB @ 8kHz
SIGNAL TONOISERATIO 80dB typical
TUBE COMPLEMENT 12AX7 (3), 12AU7 (2), 6L6/5881 (4)
POWER REQUIREMENTS 120VAC, 60Hz, 190VA; 100VAC, 50/60Hz, 190VA; 230VAC, 50/60Hz, 190VA
SIZE AND WEIGHT23 3/4 W x 11 H x 12 3/43 D, 40 lbs.
V-4BH rear panel:
