Setting the gain calculations help.

[ccwatson160]

I am using a multimeter to tune my amp to match the sub using a 55hz test tone at 75% max volume. I understand the Ohm's Law calculations for what output reading I need but I'm confused what numbers I should use to calculate with. I have my dual voice coil sub wired in parallel to give me 1Ω but I don't have the number or fully understand how to figure out the impedance for a dual voice coil sub.
My question is using the information below what number should my multimeter read when I adjust the gain for this particular setup. Thank you!
Amp: Pioneer ‎GM-D8701
(1Ω Stable)
Maximum Output
600W (4Ω)
1600W (1Ω)
Nominal Output
800W (1Ω)
500W (2Ω)
300W (4Ω)

Sub: Pioneer TS-D12D2
Maximum Output
2000W
Nominal Output
600W
Nominal Impedance
2Ω DVC

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[winkychevelle 10+ year member]

V(ac)=√(w×r)
28.28v(Ac)=√(800w×1ohm)

 

[hispls 5,000+ posts]

I am using a multimeter to tune my amp

Why not just dial in your gains while playing the type of music you intend to use?

 

[ccwatson160]

Why not just dial in your gains while playing the type of music you intend to use?

If I had access to an oscilloscope I'd use that. I listen to many different types of music with custom EQ settings for each to keep from overpowering the system. I prefer to be a bit more precise than "just crank until it distorts."

 

[ThxOne Premium Member]

Just a simple guide.

 

[ThxOne Premium Member]

To make it easier... use a 40hz (-10db) tone. Set the amp gain to 28.28v.