A question for the OP: When you say that you can’t get enough volume with the combination of your 40 watt amp and 87 db speakers, is the symptom (a) if you turn the volume control up past a certain point you hear clipping distortion, indicating that the amp can't supply enough power, or (b) you simply run out of range on the volume control, and at its maximum setting the sound is undistorted but is not loud enough, which would signify a gain problem rather than a power problem?
One reason I ask is that the 30 db gain of your Mystere integrated amp is on the low side, for an integrated. Another reason I ask is that as Audiothesis stated earlier "40 watts will get you around 103 db at 1 meter and that isn’t anything to scoff at." (And that is from just one speaker, not two. Although it assumes that the specs on the amp and speaker are accurate. Also, at distances greater than 1 meter that volume will fall off at 6 db per doubling of distance, neglecting room effects).
All of which leaves me unsure as to whether the problem is not enough power capability for your 87 db speakers, or not enough gain, or perhaps both. If the problem is not enough gain, there are probably solutions that are considerably less expensive than purchasing new speakers.
Regards,
-- Al
One reason I ask is that the 30 db gain of your Mystere integrated amp is on the low side, for an integrated. Another reason I ask is that as Audiothesis stated earlier "40 watts will get you around 103 db at 1 meter and that isn’t anything to scoff at." (And that is from just one speaker, not two. Although it assumes that the specs on the amp and speaker are accurate. Also, at distances greater than 1 meter that volume will fall off at 6 db per doubling of distance, neglecting room effects).
All of which leaves me unsure as to whether the problem is not enough power capability for your 87 db speakers, or not enough gain, or perhaps both. If the problem is not enough gain, there are probably solutions that are considerably less expensive than purchasing new speakers.
Regards,
-- Al