Ampeg B328, B3158 manual Technical Specifications, Output Power Rating

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B3/B328/B3158 Bass Amplifier

Technical Specifications

OUTPUT POWER RATING

 

 

 

 

 

B3, B328:

150 Watts RMS, 4load

 

 

 

B3158:

Low Freq - 100 Watts RMS, 4

load

 

 

 

High Freq - 50 Watts RMS, 8

load

 

 

 

 

 

 

POWER REQUIREMENTS

120VAC, 60Hz, 170VA

 

 

 

 

 

100/115VAC, 50/60Hz, 170VA

 

 

 

 

220-240VAC, 50/60Hz, 170VA

 

 

 

 

 

 

 

TONE CONTROL RANGE

 

 

 

 

 

Bass:

±8dB @ 50Hz

 

 

 

 

Ultra-Mid:

+5, -17dB @500HZ

 

 

 

 

Treble:

+17, -22dB @ 5KHZ

 

 

 

GRAPHIC EQ RANGE

±11dB @ 40Hz; ±8dB @ 80, 150, 300, 600, 900, 2kHz; ±9dB @ 9kHz

 

 

 

 

 

GAIN

 

66dB typical, tones @ center

 

 

 

 

 

 

 

SIGNAL TO NOISE RATIO

75dB typical

 

 

 

 

 

 

 

 

INTERNAL SPEAKERS

B3

B328

 

B3158

Low Frequency:

Size/Type:

15” Ampeg Custom (1)

8” Polypropylene (2)

15” Ampeg Custom (1)

 

Magnet:

56 oz

30 oz

 

56 oz

 

Voice Coil:

2.5”

1.5”

 

2.5”

 

Impedance:

4

8

 

4

High Frequency:

Size/Type:

N/A

Hi-Efficiency Piezo (1)

8” Polypropylene (1)

 

Magnet:

 

 

 

30 oz

 

Voice Coil:

 

 

 

1”

 

Impedance:

 

 

 

8

 

 

 

 

 

SIZE AND WEIGHT

B3

B328

 

B3158

(W x H x D)

 

20”x26”x13.5”

20”x18.75”x13.5”

20”x34.5”x14.5”

 

 

68 lbs.

57 lbs.

 

84 lbs.

 

 

 

 

 

 

www.ampeg.com

Ampeg reserves the right to change specifications without notice.

Ampeg is proudly Made in America. ©1999 SLM Electronics, 1400 Ferguson Avenue, St. Louis, MO 63133 U.S.A.

P/N 47-588-03 • 10/99

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Contents B3 / B328 / B3158 An Introduction to your new Ampeg Bass Amplifier FeaturesImportant Safeguards and Precautions Front Panel Controls and Their Use Rear Panel Ground Prong of the AC PlugAlto EL Borne DE Tierra DE LA CLAV- IJA DE CA Some Suggested Settings Funk PoppingTroubleshooting System Block DiagramTechnical Specifications Output Power Rating

B3158, B3, B328 specifications

The Ampeg B328, B3, and B3158 are part of Ampeg's esteemed lineup of bass amplifiers, cherished by musicians for their power, clarity, and versatility. Each model presents unique features and innovative technology that cater to different playing styles and musical genres.

The Ampeg B328 is a compact yet powerful combo amplifier designed for both practice and live performances. It features a 200-watt output, delivering rich and punchy sound that is perfect for any stage or rehearsal setting. The B328 includes a 8-inch speaker combined with a high-frequency tweeter, providing a broad frequency response. One of its standout features is the built-in limiter, which protects against distortion and overload, ensuring clean sound at high volumes. Additionally, the Equalization (EQ) section comprises three band EQ controls allowing players to shape their tone, complemented by an Ultra Low and Ultra High switch for enhanced tonal flexibility.

The Ampeg B3 amplifier is a versatile and portable solution for bassists on the go. With its robust 300-watt output, it is ideal for both practice and performances. This model also utilizes a 12-inch speaker for powerful low-end response. A key feature of the B3 is its blending of traditional tube sound with modern digital technology. It includes a Tube Gain control, providing users with the warmth associated with all-tube amplifiers and the reliability of solid-state circuitry. The B3 also boasts a comprehensive EQ section, enabling users to fine-tune their sound. Furthermore, it has a headphone output for silent practice, and a direct output for easy recording or PA connection, increasing versatility in various settings.

Lastly, the Ampeg B3158 features a unique combination of a 15-inch speaker and a built-in compressor, delivering an impressive 350 watts of power. This amps excels in producing deep, resonant lows that are characteristic of Ampeg’s iconic sound. The B3158 is equipped with a four band EQ that allows extensive tone shaping and includes a presence control for enhancing high frequencies. It also features a cabinet that is designed for portability without compromising sound quality. Another important aspect of the B3158 is its dual input channels, which provide flexibility for connecting multiple instruments or effects.

Overall, the Ampeg B328, B3, and B3158 serve a broad range of musical applications. From gigging musicians to studio recording, these amplifiers offer fundamental features, advanced technologies, and exceptional sound quality that underline Ampeg's commitment to innovation and performance in the world of bass amplification.