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HELP just bought a SUNN spectrum 1

W

worldsnake

Jan 17, 2012
12
0
#1
just won a sunn spectrum 1 off of ebay. i cant find hardly any info on this amp head except that it pushes 125 watts and has either a 16 or 8 ohm option...

does this mean I cant use it for my ampeg 810 as a mono for all 8 speakers?

Im kind of new at the bass world so I know this is a newb question. I just dont want anything to catch fire. also, I want to get the best sound I can get from this thing. I might be re-listing it on ebay if I cant use it for this rig. thanks!
 
#3
worldsnake said:
just won a sunn spectrum 1 off of ebay. i cant find hardly any info on this amp head except that it pushes 125 watts and has either a 16 or 8 ohm option...

does this mean I cant use it for my ampeg 810 as a mono for all 8 speakers?

Im kind of new at the bass world so I know this is a newb question. I just dont want anything to catch fire. also, I want to get the best sound I can get from this thing. I might be re-listing it on ebay if I cant use it for this rig. thanks!
Click to expand...

I recently found a Invalid Link Removed, I wonder how similar it is? That has a pair of KT88s for output tubes, what's in yours?

Note that the schematic shows the 4 and 8 ohm taps used for the output - but there's a 16 ohm tap (which is just used for feedback).
 
#4
The Spectrum I is a 2 X EL34 output, Dynaco Mk IV based guitar amp rated for 40 watts. Low powered but should work just dandy for bass.
It came paired with a 38" X 24" X 11.5" bass reflex cabinet loaded with a single JBL D130.
Only offered in late 1966 & 1967 as a 1967 model as far as I know.

If it has the OEM output transformer it has taps for 4, 8, and 16 ohms, and the outputs were factory configured for either 4 & 8 or 8 & 16 ohms with switching jacks that default to the lower impedance tap when both jacks are used. It's pretty simple to switch the taps from one configuration to the other.

The Spectrum II is a different circuit; 60 watts out of a pair of KT88's and much bigger "iron".


Link Removed. Not a real high traffic or "instant response" site, but a whole bunch of knowledgable and helpful Sunn-o-philes hang out there.
 
#6
Yeah I decided to sell it to my buddy...I'm going with 2 ampeg svt200t's for the full 8x10 power I want. Thanks for the input though. I'm loving the sunn line up. I'm looking into tracking down 2 concert bass amps. I'm pretty sure that would be plenty loud and tone driven.
 

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