Originally Posted by commsysman
The Energy speakers do not have large enough drivers to provide adequate bass for the front channels. Many people buy them and are soon looking for something with better performance.
You want front speakers that are specified to go down to 60 Hz or lower, -3db.
There ARE many monitor/bookshelf speakers that will produce enough bass for the front channels IF they are mounted on rigid solid stands or placed on top of tables or bookshelves that provide a solid foundation.
Nope. There are just a few if you include speakers 24" H x 15" W x 12" D or so which are 3-ways or 2-way wave guides with 10-12"+ mid-bass drivers. A single 8" driver iis marginal for an 80Hz cross-over and has polar response issues unless paired with an extra beefy tweeter with a low cross-over point. Otherwise such speakers don't really exist for the listener, just for the interior designer (who wants small) and manufacturer (that wants a lower bill of materials cost
for bigger profits)
Output at the maximum linear excursion into full space for various representative drivers at 3 feet is as follows at 120, 80, 40, and 20Hz. Many drivers have less excursion and lower output. Subtract 3-5dB for living room dimensions and more for a larger space for the SPL at your listening position
Size Driver Sd (cm^2) x xmax (mm) 120Hz 80Hz 40Hz 20Hz
4 1/2" Seas W12CY001 50 x 3 89dB 82dB 70dB 58dB
5 1/4" Peerless 830873 88 x 3.5 95dB 88dB 76dB 64dB
6 1/4" Seas L16RN-SL 104 x 6 101dB 94dB 82dB 70dB
7" Seas W18EX001 126 x 5 102dB 95dB 83dB 71dB
8.5" Seas W22EX001 220 x 5 106dB 99dB 87dB 75dB
10" Peerless 830452 352 x 12.5 118dB 111dB 99dB 87dB
Good jazz recordings at 85dBC SPL average can have 107dB peaks at the speaker. Reference level home theater can get you to 110dB.