Ampeg Classic User Manual

2
Classic Analog Bass Preamp
IMPORTANT SAFETY INSTRUCTIONS
1. Read these instructions.
2. Keep these instructions.
3. Heed all warnings.
4. Follow all instructions.
5. Do not use this apparatus near water.
6. Clean only with a dry cloth.
7. Do not block any ventilation openings.
Install in accordance with the manufacturer’s
instructions.
8. Do not install near any heat sources such
as radiators, heat registers, stoves, or other
apparatus (including amplifiers) that produce
heat.
9. Do not defeat the safety purpose of the
polarized or grounding-type plug. A polarized
plug has two blades with one wider than the
other. A grounding-type plug has two blades
and a third grounding prong. The wide blade
or the third prong are provided for your
safety. If the provided plug does not fit
into your outlet, consult an electrician
for replacement of the obsolete outlet.
10. Protect the power cord from being
walked on or pinched particularly at plugs,
convenience receptacles, and the point
where they exit from the apparatus.
11. Only use attachments/accessories
specified by the manufacturer.
12. Use only with a cart,
stand, tripod, bracket, or table
specified by the manufacturer,
or sold with the apparatus.
When a cart is used, use
caution when moving the
cart/apparatus combination
to avoid injury from tip-over.
13. Unplug this apparatus during lightning
storms or when unused for long periods
of time.
PORTABLE CART
WARNING
CAUTION
The lightning flash with arrowhead symbol within an equilateral
triangle means “electric shock hazard”. It is intended to alert
the user to the presence of uninsulated “dangerous” voltage
within the product enclosure, that may be of significant
magnitude to constitute a risk of electric shock to persons.
RISK OF ELECTRIC SHOCK! DO NOT OPEN!
CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK DO NOT
REMOVE COVER (OR BACK). NO USER-SERVICEABLE PARTS INSIDE.
REFER SERVICING TO QUALIFIED PERSONNEL.
The exclamation point within an equilateral triangle means
“Warning/Caution!”. It is intended to alert the user of the
presence of important operating and maintaining (servicing)
instructions in the literature accompanying the appliance.
14. Refer all servicing to qualified service
personnel. Servicing is required when the
apparatus has been damaged in any way,
such as power-supply cord or plug is
damaged, liquid has been spilled or objects
have fallen into the apparatus, the apparatus
has been exposed to rain or moisture, does
not operate normally, or has been dropped.
15. This apparatus shall not be exposed
to dripping or splashing, and no object filled
with liquids, such as vases or beer glasses,
shall be placed on the apparatus.
16. Do not overload wall outlets and
extension cords as this can result in
a risk of fire or electric shock.
17. The MAINS plug or an appliance
coupler is used as the disconnect device,
so the disconnect device shall remain
readily operable.
NOTE: This equipment has been tested
and found to comply with the limits for a
Class B digital device, pursuant to part 15
of the FCC Rules. These limits are designed
to provide reasonable protection against
harmful interference in a residential
installation. This equipment generates,
uses, and can radiate radio frequency
energy and, if not installed and used in
accordance with the instructions, may
cause harmful interference to radio
communications. However, there is no
guarantee that interference will not occur
in a particular installation.
If this equipment does cause harmful
interference to radio or television reception,
which can be determined by turning the
equipment off and on, the user is encouraged
to try to correct the interference by one or
more of the following measures:
• Reorient or relocate the receiving
antenna.
• Increase the separation between
the equipment and the receiver.
• Connect the equipment into an outlet
on a circuit different from that to which
the receiver is connected.
• Consult the dealer or an experienced
radio/TV technician for help.
WARNING — To reduce the risk of fire or electric shock, do not
expose this apparatus to rain or moisture.

Ampeg Classic Specifications

Audio Specifications

signal to noise ratio	75 dB
maximum gain	+18 dB
bass tone control	+7/–20 dB @ 40 Hz
mid tone control	+5/–11 dB @ 500 Hz
treble tone control	+10/–10 dB @ 4 kHz
ultra hi	+7 dB @ 8 kHz
ultra lo	+2 dB @ 40 Hz / –10 dB @ 500 Hz

Impedance

input impedance	1 M @ Normal, 83 k w/–15 dB Pad
output impedance	120

Power Requirements

internal power	9V Battery
external power	9VDC, ≥20 mA, center negative

Weight and Dimensions

size (H x W x D)	2.2 in x 2.6 in x 4.5 in
size (H x W x D) metric	56 mm x 66 mm x 114 mm
weight	0.6 lb / 0.3 kg