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Folks,
When Magnepans's published bass performance is say 50 hz (SMGc) is this the mechanical limit of the speaker based on the size of the bass driver, or is this a measured bass response?
The reason I ask is that in my room the SMGc bass seems to go down into the lower 40 hz area, based on listening to test records.
I am experimenting with using a pair of Maggie panels as woofer augmentation for my Quad ESL 63's and have been surprised at what the SMGc panels do, considering their published specs at 50 hz. In my room/system they are clearly going lower than that.
Any ideas or speculation would be welcomed.
Thanks,
Louis
Follow Ups:
The mechanical limits define the speakers SPL capability, not its frequency response. This being an electro-mechanical device, the output below resonance will fall-off at a rate of approximately 12db/octave. In addition, 6db/octave dipole cancellation adds and ultimately yields an 18db/octave roll-off rate at really low frequencies.
Magnepan speakers are specified with a low-frequency limit/extension, but that doesn't mean the response falls off like a brick wall at that frequency. Your SMG's are spec'd with a lower limit of 50Hz, but they still have usable output below that.
Cheers,
Dave.
Dave,
Thanks...that's what I was trying to figure out.
And now, the next question proly oughta go in another post.
My 3.6 falls rapidly below 45 Hz and the maximum SPL is limited even at higher frequencies. The 1.6 or 1.7 are even more limited in the bass response.
It also depends on the power amp you are using. With my Berning ZH270 I am getting a full 32hz from my 3.6's. I also am using the Limage/HK setup wich also reinforces bass response
Alan
Thanks Roger, that corresponds, more or less, to what the specs for the 3.6 are on the MUG listing page.
That listing shows the bottom for your 3.6 at 35 hz, so the drop from 45 hz would be pretty steep and fast, probably.
I am certainly not getting less than 42 hz out of the panels I am using, but they are being driven by plate amps from a crossover with the xover point set at 60 hz, which is different than being driven full range. Maybe that explains some of it.
It is also possible my panels are sitting exactly in a room node or something.
All this is very interesting...the bass I am getting certainly matches the Quads better than any box woofer I have tried.
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