SVT-350H

Troubleshooting

In the unlikely event that your SVT-350H should stop working properly (or just stop working), take a few minutes to trou- bleshoot it before you call for service. You can save yourself a lot of time and sometimes money by doing it yourself, and often the cure for the problem is something quite simple.

NO SOUND

 

 

 

LEDs LIGHT

 

 

 

 

 

 

 

 

 

 

 

 

 

LEDs DON'T LIGHT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Check amp controls, check

 

 

 

 

 

 

Check AC outlet

 

 

 

 

 

for signal from bass

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OUTLET OK

 

NO OUTLET

 

 

NO SOUND

 

 

SOUND OK

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Check power cord,

 

Check house fusebox

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Listen for hum

 

 

 

 

 

 

 

 

 

 

fuse, power switch

 

or circuit breaker

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

NO HUM

 

 

 

 

 

 

 

 

 

 

HUM

 

 

 

 

 

 

 

 

 

 

OK

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Check speaker

 

 

 

 

Unplug bass,

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

touch tip of cable

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Speaker OK

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

NO CHANGE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SOUND OK

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Replace cable

 

 

 

 

 

 

 

 

 

 

 

 

NO CHANGE

SEE BELOW

 

 

POOR SOUND

 

 

 

 

 

 

 

 

 

 

 

 

 

Check bass, cables

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

POOR SOUND

 

 

 

SOUND OK

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Check speaker(s)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SPEAKER(S) OK,

 

SPEAKER(S)

 

 

POOR SOUND

 

DEFECTIVE

 

Replace speaker(s)

POOR SOUND SOUND OK

SEE BELOW

If the problem isn’t covered above, or if the steps lead you here, then contact your Ampeg dealer for service infor- mation. Also, you should refer your amp to an authorized service center for servicing if it gets dropped, has liquid spilled into it, or sustains damage to its power cord.

System Block Diagram

0dB

 

 

LIMIT

 

 

 

 

 

 

LED

 

PROTECTION

 

 

 

 

POWER AMP

 

RELAY

 

 

PRE

 

 

 

 

 

SPEAKER

 

 

 

 

 

OUT

 

 

 

 

 

 

 

BALANCED

 

 

Thermal Shutdown,

 

 

POST

LINE OUT

COOLING

LIMIT

Low Voltage,

 

 

DC Protect

 

 

 

 

FAN

ON

 

 

SPEAKER

 

 

 

 

 

 

PAD

-20dB PAD

 

 

POWER AMP

 

OUT

 

 

 

 

 

 

 

 

 

 

IN

 

 

 

 

 

 

 

1+

 

 

 

 

 

PREAMP

1- 2- SPEAKON

 

 

 

 

OUT

2+

JACK

 

 

 

 

 

 

 

MASTER

 

 

 

 

 

 

VOLUME

 

 

 

 

 

PEAK

 

 

 

 

EFFECTS

 

 

 

 

 

RETURN

 

LED

 

 

 

 

 

 

 

 

 

 

 

EFFECTS

 

 

EQ

 

 

 

SEND

GAIN

 

IN

 

 

 

 

 

9 BAND

 

 

 

 

 

 

 

 

 

 

 

 

GRAPHIC

 

 

 

 

 

BASS ULTRA MID TREBLE

EQ

 

 

 

 

7

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Image 7
Ampeg SVT-350H manual Troubleshooting, System Block Diagram

SVT-350H specifications

The Ampeg SVT-350H is a powerful bass amplifier head that has garnered respect among musicians for its remarkable tonal quality and robust build. Designed for professional performance, the SVT-350H brings together innovative technology with classic Ampeg features, making it a versatile choice for a wide range of musical styles.

One of the standout features of the SVT-350H is its 350-watt output, which allows it to deliver substantial power suitable for both practice settings and large performances. This amp can efficiently drive a variety of speaker cabinets, providing a rich and dynamic sound that can fill any venue. The amplifier is designed with a solid-state preamp combined with a MOSFET power section, which produces a warm and punchy tone reminiscent of vintage tube amplifiers, but with enhanced reliability and reduced maintenance.

A key component of the SVT-350H is its four-band EQ, which allows players to fine-tune their sound with precision. This includes controls for bass, midrange, and treble frequencies, enabling users to shape their tone to suit their playing style or the needs of specific musical genres. Additionally, a midrange frequency switch offers further customization, allowing players to choose between different mid options for greater versatility.

The SVT-350H features a built-in compressor that can be engaged to smooth out dynamics and add sustain to notes, making it an ideal tool for both slap bass and fingerstyle playing. This enhances the amplifier’s capability to handle aggressive playing styles while maintaining clarity and definition.

Connectivity is another strong point of the SVT-350H. It includes an aux input for connecting external audio sources, perfect for practicing along with tracks. It also features a balanced XLR output for direct recording or sending a signal to a PA system, ensuring a seamless integration into any setup.

The durable chassis and reliable components make the Ampeg SVT-350H an industry favorite, well-suited for both touring musicians and local gigging artists. With its powerful output, extensive tonal shaping options, and robust build quality, the SVT-350H continues to be a prominent choice for bass players seeking a reliable and versatile amplifier. Whether for studio work or live performances, this amplifier is designed to deliver exceptional performance and adaptability, making it a cornerstone in the world of bass amplification.