Given the wild perturbations in real rooms in those low freq regions, that might be simple to the point of useless. I use a two-module bass parametric EQ (the usual cookbook design).
Back to this thread: yes, you can add parametric equalization (full range or just bass) even if you don't have a separate pre-amp or bi-amping, or anything special (use the tape record loop trick).
If you can make your ear happier at the two worst points in a 1.5 octave compass, you are doing great.
Funny, I've been experimenting the little "loudness" switch on my pre-amp. I keep the volume knob around half-way (much further up than earlier systems) and it just might be doing something nice given that volume knob setting tracking along with absolute loudness in the room.
Yes, I believe in "loudness" but neither me nor anybody I know ever does the compensation. We just EQ our systems for regular loud listening levels and leave 'em set there.
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If you read thro these reply's, you will be mad not to see hardly any relevant reply to my question, just lots irrelevant of crap about what they think they know about instead!
No one did answer your question, did they?
With the 2 drivers in series, the SPL remains the same - at the same voltage. So 91dB.
However, as the impedance is now 8ohms, you are using just 1/2 the power you did before, as long as you don't move the volume knob.
It's important to think in terms of voltage when setting gain. Since your amp delivers voltage, you need to know what each driver is doing at that voltage. Make sense?
With the 2 drivers in series, the SPL remains the same - at the same voltage. So 91dB.
However, as the impedance is now 8ohms, you are using just 1/2 the power you did before, as long as you don't move the volume knob.
It's important to think in terms of voltage when setting gain. Since your amp delivers voltage, you need to know what each driver is doing at that voltage. Make sense?
The two 4 ohm drivers in series will present an 8 ohm load to your amplifier. Your amplifier if it is a typical SS amplifier will produce ~ 2/3 the watts it can with only one 4 ohm driver. If you connect the speakers in parallel your amplifier will see a 2 ohm load. If the amplifier does not smoke (it will draw a lot of amps) it will produce more watts. So far this does not answer your question either.
IIRC two identical drivers working together will have a 6db increase in output. Remember that in series there are fewer watts available from the amplifier and in parallel the amplifier may over heat and die.
For two identical drivers in an single enclosure driven by two identical amplifiers there will twice as many watts used from the wall and a 6db increase in acoustic output.
Two identical drivers will use twice the watts and producr 4 times (+6db) the output.
DT
All just for fun!
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