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Dual SVT's through an 8x10 cab

#3
Please explain.
Are you really using two SVTs into one 8x10?
What bass are you using?
Try your eq. flat with one SVT.
Visit your audiologist as you may need MiracleEar or that other hearing aid made by Marshall with 8x12s on each ear:).
Where are you playing and what amps are the other folks using?
How loud is the drummer?
Have your amps been serviced recently?
Who is buried in Grant's tomb?:)
 
#4
Thanks for the replies. I am already using the Tone Bone Big Shot as my ABY box and it has been silent

I am actually running 2 SVT's into 1 810
I am using an active Yamaha RBX with humbucking stock pickups.
I have tried my EQ flat with one SVT (through the upper and lower halves of my 810)
I know that I am going deaf but I have heard the same thing from soundguys/friends.
There is a Mesa Dual Rec being run through a marshall 4x12 on my side as part of a stereo guitar rig.
My drummer is not all too loud but I dod usually position my cab behind him and to the right
One of my SVTs is brand new and the other was just recently serviced.
Grants tomb is inhabited by Melissa Joan Hart.
 
#5
I'm confused by how you are running two amps into one cab. If it's the way I think, not only are you possibly wiring the amps out of phase, causing a drop in volume as well as a serious loss in lows, you are risking REAL damage to your amplifiers.
 
#6
Something must be wrong if an SVT into an 8x10 is no loud enough.

I run a GBE 1200 into a Mesa 4x12 (same size as 8x10) and it's impossible to be in the same room without ear plugs.

Both guitar players use 100w amps into marshall 4x12s and I can still hear the bass perfectly.
 
#7
Dan1099 said:
I'm confused by how you are running two amps into one cab. If it's the way I think, not only are you possibly wiring the amps out of phase, causing a drop in volume as well as a serious loss in lows, you are risking REAL damage to your amplifiers.
Click to expand...

Modern SVT 8x10s have input jacks that allow the cab to be run as a single 4 ohm 8x10 or 2 8 ohm 4x10s. So, no issue if done correctly; 1 amp to top cab input (black) and the other to one of the lower inputs.

Just remember, amps don't make noise. Speakers do. And the more speakers moving air the more noise you'll make. You may find two 8x10 cabs with 1 SVT head to make much more noise then 2 SVT amps into 2 4x10s: 16 noise makers vs 8.
 
#8
I might be wrong on this but unless your ABY box has a preamp boost to it you''ll get a reduced input into your amps. You might want to try a preamp instead, it'll send a hotter signal to your power amps. Sansamp RBI might work if you like the way it sounds Get yourself some ear plugs too!
 
#10
EASonBass said:
Modern SVT 8x10s have input jacks that allow the cab to be run as a single 4 ohm 8x10 or 2 8 ohm 4x10s. So, no issue if done correctly; 1 amp to top cab input (black) and the other to one of the lower inputs.
Click to expand...
I wonder if the amps have 8 ohm taps? The svt-cl doesn't. If the ohmage of the cab is higher than the amp is expecting that's going to cut volume, as well as make a tube amp unhappy.
 
#11
Plain Old Me said:
I'd test different cables, a different bass, and try using 1 SVT into the 810 to see if anything changes before trying anything else.
Click to expand...

I know you don;t really want to alter your sound, but seriously, if you can't hear yourself with that arrangment, you are either going deaf, or you need to eq. Mids help out alot when you need to hear yourself. Don't cut them out, and make a smiley face eq. while boosting the bass, because the lows take alot more power to reproduce than mids and highs. Mids help you cut through, no mids, you usually get lsot in the mix.

- Good luck.
 
#13
el_Kabong said:
I wonder if the amps have 8 ohm taps? The svt-cl doesn't. If the ohmage of the cab is higher than the amp is expecting that's going to cut volume, as well as make a tube amp unhappy.
Click to expand...

el_Kabong, thanks for pointing out the fact that SVTs do not have 8ohm taps. I didn't even think of that while writing the previous.

Not sure of the impact on volume but definitely not good for the transfomer.
 
#16
Yeah, that's half your problem. You're stressing out your heads running them at 8 ohms at a ridiculous volume, and you're either going to blow a lot of tubes or you're going to toast your output transformer. All SVT tube heads are only meant to run at 4 or 2 ohms.

Repeat after me:

ONE SVT HEAD PER CABINET

Now if you're not getting enough volume with one head, you might try boosting your mids at 800 hz and maybe adding a little treble. SVT's have a mid scoop, so bringing up 800 helps bring back some volume at a frequency you can hear yourself at. If that's not working, then you have two choices...buy a solid state or hybrid head with more power or buy a second cab and use both heads. But don't run two heads into one 810 like that unless you want to be known as a former SVT user when your transformers fry.
 
#17
This sounds like a bad idea all around. Have you tried one SVT into the 8x10? I've heard (know) it works wonders.

I don't understand how you couldn't possibly be loud enough with one SVT through an 8x10? I really really don't.

If you're using the top 410 for high end and the bottom 410 for lows, I maybe get it, but still, I really don't.

Edit: JimmyM beat me to the punch. Which we probably have a lot of using one head per cab.
 
#18
The modern SVT's have a mid scoop. The vintage one's like mine and yours, Jimmy, actually are quite flat when the controls are in the noon position. I just had mine on the scope today. To get it perfectly flat, I boost 3k just past the first click on the face plate.

My brother has a modern one and wish that he would bring it over some time so that we can try to match the eq curves some how to get it closer to my svt.
 
#19
kringle77 said:
The modern SVT's have a mid scoop. The vintage one's like mine and yours, Jimmy, actually are quite flat when the controls are in the noon position. I just had mine on the scope today. To get it perfectly flat, I boost 3k just past the first click on the face plate.
Click to expand...
Thuis is very interesting to me, because I hear the first channel on mine (and other vintage SVT's I've played recently) as having a bump at around 125 and a scoop somewhere along that 800-1k area, while the second channel sounds like a flat channel. Of course, I haven't scoped it and I'm only going by my ear, but the Markbass LMII also scopes out to near-flat, and it sounds a lot closer to the SVT's second channel than the first. Then again, Ampeg had always strived for near-flat response in their tube amps, so I'm not saying my ears are calibrated perfectly.

So now I want to scope mine out. How did you do it? Can it be done on a computer? How do volume settings affect your results?
 

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