How adequate is 40 watts?
Let's see:
40 watts at 8Ω = 17.8Vrms = 25.28Vpk
My speakers (4Ω) gave 87dB at the listening position with 2.83Vrms...
Assuming the SECA can hold its volts and "double down" flowing 80W across 4Ω, some guesstimating:
2.83Vrms- 2W - 87dB
4.00Vrms - 4W - 90dB
5.65Vrms - 8W - 93dB
8.00Vrms - 16W - 96dB
11.3Vrms - 32W - 99dB
16.0Vrms - 64W - 103dB
17.8Vrms - 80W - 104dB
That's right at my usual loud peak level, so, might be
just adequate for me...
---
Playing a bit extra loudly recently I saw 50V on the Fluke, assuming that's a peak reading:
50Vpk x .7071 = 35.35Vrms
35.35Vrms / 16.0Vrms = 2.209 voltage ratio
2.209 voltage ratio = 6.88dB gain
103dB + 6.88dB = 109.88dB
35.3Vrms - 312.4W - 109.88dB (I think I saw 110)
So, not quite adequate for headbanging and amp cooking (146F on the heatsink at that time) here. Not that I do that, 120F is more normal hot and loud on the sinks, with about 100F on the case cover.
---
What's the rail voltage on the SECA 40W?