Last night I ordered a Mesa Subway D800+ to run my Ampeg SVT 810E cabinet. My question is, will I have to use both speaker outs to get the full 800 watts out of it?
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Question about getting full wattage out of head
- Thread starter UnhallowedSam
- Start date
Doesn't matter if you use one or both speaker outs, the amp reads the load it's given via the cab. So if one cab is 4ohm and the amp runs full wattage at 4ohms, one speaker out is all that's needed.
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No idea why the last sentence has a line thru it. Probably will never know.
It just looks like you are your own harshest critic.
This cab is in two parts, upper and lower. Please see the manual below. It clarifies how you can connect.
Getting the full power will depend on the impedance of the cabinet. Utilizing the upper and lower halves together, you have a 4 ohm load to the amplifier (each part is 8 ohms). The amplifier will "see" 4 ohms and put out the specified power at 4 ohms. It looks, from the manual, that you could do this with one cable or two.
My preference would be for a single speakon twist lock cable. This is much safer than 1/4 inch connectors at 400 watts each.
Getting the full power will depend on the impedance of the cabinet. Utilizing the upper and lower halves together, you have a 4 ohm load to the amplifier (each part is 8 ohms). The amplifier will "see" 4 ohms and put out the specified power at 4 ohms. It looks, from the manual, that you could do this with one cable or two.
My preference would be for a single speakon twist lock cable. This is much safer than 1/4 inch connectors at 400 watts each.
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Al Kraft
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- May 2, 2016
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The D-800+ will provide 400 Watts into 8 Ohm loads and 800 Watts into 4 or 2 Ohm loads. It would appear that the total 8 drivers in your cab present a 4 Ohm load with a single speaker cable hooked up to the correct cabinet input. While you could run a separate speaker cable into the appropriate cabinet inputs so that each would present an 8 Ohm load (i.e. the amp would effectively see two 8 Ohm 410 cabs and thus be operating with a 4 Ohm load and capable of the 800 Watt output), I see no difference or advantage over just using a single Speakon cable.
- Feb 12, 2006
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- Development Engineer-Mesa Boogie, Development Engineer-Genzler (pedals), Product Support-Genz Benz
One thing I would recommend with this cabinet is to set the HPF around 45Hz, it will improve the overall performance and power handling.
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Holy cow I never knew of a cabinet that could be utilized in two parts.
Much more common on guitar cabs, a lot of 412s are wired for mono/stereo for example. But yeah the ampeg 810s since the early 2000s have had the switched input two allow you to run it as two 8 ohm 410s.
Thats about where I set my Forte HP when I play through pretty much any cabinet. I love it that designers have started implementing HPF’s into the amps now. It’s super useful.
- Feb 12, 2006
- 61,051
- 5
- 221,011
- Disclosures
- Development Engineer-Mesa Boogie, Development Engineer-Genzler (pedals), Product Support-Genz Benz
