Log into Facebook
[h=Andrea Govigli]2[/h]
· 691gi5p3on7t6o6rud8h142h ·
hi, I have a pair of gpa 515 8 lf, I would like to know which is the optimal volume to build the bass reflex speakers, I did some tests but I'm not happy with the result ..., thanks to those who help me!
Greets!
'Optimal' depends on a number of things such as what your performance goals are, whether or not it will be driven with a high output impedance amp and/or what sort of EQ will you use, if any; then there's the room dimensions and where in it each speaker will be placed and area where the listening 'sweet spot' is.
So for now just a couple of basic cab alignments based on the published specs and allowing only a 1/2 ohm series resistance [Rs] for speaker wiring: https://greatplainsaudio.com/wp-content/uploads/2016/06/515_LF.pdf
[Qts']: [Qts] + any added series resistance [Rs]: http://www.mh-audio.nl/Calculators/newqts.html
Qts' = 0.274
Classic BR:
Vb = ~326.43 L/1.44 = ~226.69 L/8 ft^3
Fb = [actual] Fs
T/S max flat [0.707] BR:
Vb = 20*470.06*0.274^3.3 = ~131.45 L
Fb = 0.42*27.4*0.274^.0.96 = ~39.88 Hz
In either case, vent design will depend on the max [peak] power it's likely to 'feel' down in the bass.
In theory, any box size, tuning [vented alignment] within this range is 'optimal' depending on all the variables that impact its performance.
Loud is Beautiful if it's Clean! As always though, the usual disclaimers apply to this post's contents.
Bookmarks