Ampeg SVT-7 PRO: no sound comes out!!!

[Rigges]

Hi,

any help is appreciated a lot!!!

Today i finally received my hardly used SVT-7 PRO.

Connected it with a new Speakon to Jack. When turning the amp on it took a few seconds and the green light came up and the fan started.

Plugged in my bass in joyful anticipation but i couldn't hear anything!!! No sound comes out!!!

When hitting the strings the red "Signal" light and the orange "Thresh" light is flickering...

I have absolutely no idea what the problem is. Is there a fallacy or is anything broken?

Aaaaaaaaarghhhhhhh....

Please help!

Thanks
Andy

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[winterfire666]

check your speaker cable, i have bought new before only to find out it has a bad connection or even connected the wires the wrong poles on a 4 pole speakon.

also i have come across faulty speakon plugs that dont fully lock into place.

Edited April 30, 2013 by winterfire666

[Guest]

Please forgive me but it's something as simple as the mute button being pressed in ??
Apologies but It has to be asked.

[Rigges]

[quote name='kennyrodg' timestamp='1367349735' post='2064594']
Please forgive me but it's something as simple as the mute button being pressed in ??
Apologies but It has to be asked.

[/quote]

Unfortunately not muted.

Also tried another cable and also plugged the bass directly into the Power Amp In - NOTHING!!!!!!!!!

[Junkyard Rocket]

Have you tried turning it off and on again?

[tonyquipment]

Not even a fart?

[paul_5]

have you tried different a different bass? Plugging the bass directly into the Power Amp in isn't a particularly reliable way to check the power stage - it's expecting a line level signal (+4 dB or thereabouts); your bass on its own won't be putting out anywhere near that. Have you got a separate pre that you can test it with (Sansamp / Tone Hammer etc)?

[Rigges]

[quote name='Junkyard Rocket' timestamp='1367352317' post='2064646']
Have you tried turning it off and on again?
[/quote]

Over and over again...

[Rigges]

[quote name='tonyquipment' timestamp='1367352666' post='2064658']
Not even a fart?
[/quote]

Not even a fart!

[Rigges]

[quote name='paul_5' timestamp='1367352869' post='2064663']
have you tried different a different bass? Plugging the bass directly into the Power Amp in isn't a particularly reliable way to check the power stage - it's expecting a line level signal (+4 dB or thereabouts); your bass on its own won't be putting out anywhere near that. Have you got a separate pre that you can test it with (Sansamp / Tone Hammer etc)?
[/quote]

Tried different cables and different basses. Have a SansAmp Bass Driver lying here. What shall i do with it mate?

[paul_5]

If you're getting the preamp 'gain stage' lights flickering but no output then I'd suggest a different speaker lead. Can you check the 'preamp out' feed into a mixing desk?

[paul_5]

[quote name='Rigges' timestamp='1367353013' post='2064669']
Tried different cables and different basses. Have a SansAmp Bass Driver lying here. What shall i do with it mate?
[/quote]

Bass into the Sansamp - Sansamp to the 'power amp in' and don't be afraid to turn the level of the Sansamp up past half-way.

[paul_5]

Also, is there anything plugged into the headphone socket? This particular amp mutes the speaker output when you plug a pair in.

[Rigges]

[quote name='paul_5' timestamp='1367353168' post='2064674']
Bass into the Sansamp - Sansamp to the 'power amp in' and don't be afraid to turn the level of the Sansamp up past half-way.
[/quote]

Tried it. The only sound i can hear is coming from the amp's fan...

[Musicman20]

Unfortunately if its a Rev A or B, this is common. It's even happening with Rev C's!!!

I'd get Ampeg to sort it...it's a known issue.