SVT-4 PRO Bass Guitar Amplifier Owner’s Manual
SVT-4 PRO Bass Guitar Amplifier TABLE OF CONTENTS Important Safety Instructions............................................................................................................ 2–3 Introduction / Features......................................................................................................................... 4 Hook-up Diagrams........................................................................................................................... 5–7 The Front Panel..............
SVT-4 PRO Bass Guitar Amplifier 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.
SVT-4 PRO Bass Guitar Amplifier Introduction Congratulations! You are now the proud owner of an Ampeg SVT-4 PRO bass guitar amplifier. This versatile and powerful bass amplifier delivers up to 1600 watts of unsurpassed quality, offering the classic vibrance of tubes, as well as contemporary features. The SVT-4 PRO amplifier is an ideal companion to the Classic Series, Pro Series, or PF cabinets, available separately.
SVT-4 PRO Bass Guitar Amplifier Hook-up Diagrams Full Range Cabinet(s) SVT-4 PRO MONO BRIDGE Mono 1 Bridged IN (MONO) TO INPUT JACK In this example, the SVT-4 PRO’s two internal power amplifiers are bridged together to produce maximum output power. Engage the Stereo/Mono Bridge switch [Mono Bridge position].
SVT-4 PRO Bass Guitar Amplifier Hook-up Diagrams continued Stereo Stereo Effects Procesor LEFT OUT 2 RIGHT OUT INPUT 3 PWR AMP B Stage Right Cabinet(s) EFX RET EFX RET EFX LEFT/B RIGHT/A SEND PWR AMP A 5 TO INPUT JACK 1 SVT-4 PRO Stage Left Cabinet(s) 4 OUT TO INPUT JACK (STEREO) In this example, the SVT-4 PRO’s two internal power amplifiers will each power a set of full range cabinets in stereo. Disengage the Stereo/Mono Bridge switch [Stereo position].
SVT-4 PRO Bass Guitar Amplifier Hook-up Diagrams continued BIAMP HI OUT SVT-4 PRO BIAMP LO OUT 1 Full Range Cabinet(s) 2 Bi-amp: POWER AMP B P.A. IN PWR PWR AMP B AMP A Highs / Lows 4 3 POWER AMP A P.A. IN OUT (STEREO) TO INPUT JACK TO INPUT JACK In this example, the SVT-4 PRO’s two internal power amplifiers will power both a high frequency cabinet and a low frequency cabinet. The crossover point for the cabinets is determined by the Crossover Frequency control [21].
SVT-4 PRO Bass Guitar Amplifier The Front Panel 24 25 26 23 1 2 3 4 5 6 7 8 9 10 11 1. INPUT: The signal output from an instrument (active or passive) may be connected to this 1/4" input by means of a shielded instrument cable. 2. TUNER OUT: This jack supplies the only live output when the mute switch [3] is engaged. This allows for silent tuning through an electronic tuner or killing the house send with a monitor mixer send still active.
SVT-4 PRO Bass Guitar Amplifier The Front Panel continued 24 25 26 23 1 2 3 4 5 6 7 8 9 10 11 10. BASS: Use this to adjust the low frequency level of the amplifier. This provides up to 12 dB of boost, or 12 dB of cut at 50 Hz. The low frequency output is flat at the center position. 11. MIDRANGE: Use this to adjust the midrange frequency level of the amplifier. This provides up to 15 dB of boost, or 15 dB of cut at the center frequency selected by the frequency control [12].
SVT-4 PRO Bass Guitar Amplifier The Front Panel continued 24 25 26 23 1 2 3 4 5 6 7 8 9 10 11 21. CROSSOVER FREQUENCY: This sets the crossover point between the Bi-amp High and Bi-amp Low outputs when using the amplifier in bi-amp mode (see ‘Hook-up Diagrams’, pages 5–7). 22. CROSSOVER BALANCE: This adjusts the relative level between the low and high frequency bi-amp signals when using the amplifier in the bi-amp mode. 23.
SVT-4 PRO Bass Guitar Amplifier The Rear Panel 38 1+ HOT, 1– 39 1+ HOT,1– RETURN 40 41 42 43 44 29 30 28. CIRCUIT BREAKER: The SVT-4 PRO employs an AC line circuit breaker to help protect against damages due to excessive current demands. If the amplifier stops working, check the circuit breaker. NOTE: When the circuit breaker opens, the button will be protruding and showing a contrasting color. You may reset the circuit breaker by pushing it in until it latches.
SVT-4 PRO Bass Guitar Amplifier The Rear Panel continued 38 1+ HOT, 1– 39 1+ HOT,1– RETURN 40 41 42 43 44 29 30 31. STEREO / MONO BRIDGE SWITCH: This switch sets the operating mode of the amplifier. In the “out” position, the amplifier is in Stereo Mode; with the switch in the “in” position, the amplifier is in Mono Bridged Mode. 32, 34. POWER AMP IN: These jacks connect directly to the internal power amp for use with external preamps.
SVT-4 PRO Bass Guitar Amplifier The Rear Panel continued 38 1+ HOT, 1– 39 1+ HOT,1– RETURN 40 41 42 43 44 29 30 41. LINE OUT STEREO / MONO SWITCH: This switch is active only when the Pre/Post switch [43] is in the “post” position [engaged]. When active, this switch governs the signals at the Line Out jacks as follows: Stereo Mode [switch out]: • The Channel A line out jacks [44, 45] supply a signal from the Effects Loop Return Right/A jack [47].
SVT-4 PRO Bass Guitar Amplifier Suggested Settings Since so many variables affect the actual sound of any system, the following settings are offered as starting points to help you find the exact sounds your playing demands. When using the SVT-4 PRO, please keep in mind the following points: • The Gain control should be adjusted until the peak LED flashes on strong signals. [This level will vary depending on the instrument and playing style].
SVT-4 PRO Bass Guitar Amplifier Personal Settings A note about the Graphic EQ: The Graphic EQ may be used in two ways: 1) To fine tune the sound, make small adjustments at the desired frequencies and leave the EQ on throughout the entire session. (This is great for adapting to varying room acoustics when playing multiple venues) and... 2) For a completely different sound, make larger adjustments and only activate the EQ when a “second channel” sound is required (such as during bass solos).
SVT-4 PRO Bass Guitar Amplifier Rack Mounting When mounting the SVT-4 PRO into a rack, the four bottom feet should be removed to maintain the three rack space height of the amplifier. Be sure to keep the feet and their attachment bolts for future use. If the feet are reinstalled, never use screws which will protrude farther into the amplifier than the original hardware. The rack must be a high quality enclosure capable of securely supporting the weight of the amplifier.
MASTER VOLUME (A/ MONO) (B) BYPASS BYPASS MUTE MONO STEREO MONO Σ STEREO LINE OUT LEVEL FOOTSWITCH -15dB PAD FOOTSWITCH EFFECTS BYPASS LINE OUT STEREO/ MONO INPUT FRONT TUNER OUT POST PRE COMPRESSION EFFECTS RETURN (RIGHT/A/MONO) EFFECTS RETURN (LEFT/B) GAIN BAL LINE OUT (A/MONO) BAL/UNBAL LINE OUT (A/MONO) BAL LINE OUT (B) BAL/UNBAL LINE OUT (B) PEAK LED COMPRESSION EFFECTS SEND (MONO) LINE OUT PRE/POST POST PRE TUBE GAIN STAGE REAR TUNER OUT BASS ULTRA HIGH FREQ STE
SVT-4 PRO Bass Guitar Amplifier SVT–4 PRO Technical Specifications Output Power Rating Mono-Bridged: 1600 watts rms @ 4 ohms (1200 watts continuous), 3% THD Mono-Bridged: 1200 watts rms @ 8 ohms (900 watts continuous), 3% THD 2 x 900 watts rms @ 2 ohms (600 watts continuous), 3% THD 2 x 625 watts rms @ 4 ohms (490 watts continuous), 3% THD 2 x 350 watts rms @ 8 ohms (300 watts continuous), 3% THD Signal to Noise Ratio 85 dB Compression Ratio 10:1 (2 dB change in output for 20 dB change in inp
SVT-4 PRO Bass Guitar Amplifier SVT–4 PRO Technical Specifications continued Size (H x W x D) 5.6 in / 142 mm (with feet) x 19.0 in / 483 mm (with ears) / 17.4 in / 442 mm (without ears) x 15.5 in / 394 mm Weight 39.5 lb / 17.9 kg (approximately) Troubleshooting In the unlikely event that your SVT-4 PRO should malfunction, take a few minutes to troubleshoot it before you call for service.
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