Ampeg SVT-4PRO Pro Series Tube/Solid-State Hybrid Bass Ampli... - 2024 report by Whydis
Ampeg SVT-4PRO Pro Series Tube/Solid-State Hybrid Bass Amplifier Head, 1200 Watt
Product Description
Ampeg, (a division of Loud Technologies) is recognized world-wide as the premier name in bass and guitar amplification since the 1960's, when the SVT (Super Valve Tone) bass amplifier took the rock world by storm with its 300 watt...
so I got my hands on it to repair (at least there's full schematic available online) and discovered that the power stage is a FAIL. 5 pairs of IRFP240 and IRFP9240 without ANY kind active power distribution balancing, no internal short-cirtuit protection, no per-mosfet thermal monitoring
You are reading snippets from reviews of Ampeg SVT-4PRO Pro Series Tube/Solid-State Hybrid Bass Amplifier Head, 1200 Watt
Since there is no overload or short-circuit protection for power stage input this means one MOSFET failure leads to full chain-reaction which destroys every MOSFET in that channel, every passive balance resistor, feedback resistors, gate resistors and gate driver zener diodes
You are reading snippets from reviews of Ampeg SVT-4PRO Pro Series Tube/Solid-State Hybrid Bass Amplifier Head, 1200 Watt
Since there is no overload or short-circuit protection for power stage input this means one MOSFET failure leads to full chain-reaction which destroys every MOSFET in that channel, every passive balance resistor, feedback resistors, gate resistors and gate driver zener diodes
You are reading snippets from reviews of Ampeg SVT-4PRO Pro Series Tube/Solid-State Hybrid Bass Amplifier Head, 1200 Watt
Since there is no overload or short-circuit protection for power stage input this means one MOSFET failure leads to full chain-reaction which destroys every MOSFET in that channel, every passive balance resistor, feedback resistors, gate resistors and gate driver zener diodes
You are reading snippets from reviews of Ampeg SVT-4PRO Pro Series Tube/Solid-State Hybrid Bass Amplifier Head, 1200 Watt
Since there is no overload or short-circuit protection for power stage input this means one MOSFET failure leads to full chain-reaction which destroys every MOSFET in that channel, every passive balance resistor, feedback resistors, gate resistors and gate driver zener diodes
You are reading snippets from reviews of Ampeg SVT-4PRO Pro Series Tube/Solid-State Hybrid Bass Amplifier Head, 1200 Watt
I spend a whole week analyzing and repairing this piece of "engineering wonder" when it could be prevented simply by adding an active fuse to MOSFET power input
You are reading snippets from reviews of Ampeg SVT-4PRO Pro Series Tube/Solid-State Hybrid Bass Amplifier Head, 1200 Watt
More about Ampeg SVT-4PRO Pro Series Tube/Solid-State Hybrid Bass Amplifier Head, 1200 Watt
Product Description
Ampeg, (a division of Loud Technologies) is recognized world-wide as the premier name in bass and guitar amplification since the 1960's, when the SVT (Super Valve Tone) bass amplifier took the rock world by storm with its 300 watts, 8 x10" speaker cabinet and a tone that would go on to set the standard for rock and roll bass
Today, Ampeg continues on as the leader in professional bass gear and a cherished manufacturer of classic guitar amplifier designs with a continuing tradition of advancing bass tone through quality & innovation
In 2006, Ampeg reentered the electric guitar market by re-issuing its cult classic Dan Armstrong lucite body guitar, bringing back one of the most innovative design concepts in modern guitar History.
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The Pro Series delivers the power and tone required by todays modern bass players
Pro Series heads feature tube preamps and expanded EQ capability
Enclosures reproduce the entire tonal spectrum for true high-fidelity sound
In the world of high-performance bass amps, Ampegs SVT amplifiers are in a class by themselves
In true Ampeg tradition, the SVT-4 PRO offers you more power, performance and flexibility than any other bass amplifier in its class
SVT-4PRO offers an expansive palette of tonal options
The Frequency control allows you to select the center frequency for the Midrange control, giving you five distinct voicing options for the Midrange
And if thats not enough, you can use the 9-Band Graphic EQ to fine-tune your soundor use it to set up a footswitchable "second channel" with a volume boost for your bass solo
SVT-4PRO is designed for the player who wants SVT tone and performance (with a few modern enhancements) in a convenient, high-powered, rackmount design
With a huge and diverse group of artist endorsements, including Michael Anthony (Van Halen), Tony Levin (Peter Gabriel/King Crimson), Steve Bailey (Bass Extremes), and far too many others to list here, the SVT-4PRO is a clear favorite among professionals
In the world of high performance bass amps, the Ampeg SVT-4PRO has what it takes to really define your sound
Specifications: RMS Power Output: 300-Watts x 2/900 (mono-bridged @ 8 Ohms) RMS Power Output: 490-Watts x 2/1200 (mono-bridged @ 4 Ohms) RMS Power Output (2 Ohms): 600-Watts x 2 Preamp: Tubes (3 x 12AX7) Power Amp: Solid State Tone Controls: 3-Band Mid Tone Control: 5-Position Graphic EQ: Yes, 9-Band Ultra Low/High Boosts: Yes Balanced Line Out: Yes x 2 Pre/Post with Level Effects Loop: Yes x 2 Preamp Out/Power Amp In: Yes x 2 Dimensions (W x H x D inches): 19 x 5.6 x 15.5 Weight: 39.5 Pounds