18rbx100 review
- Thread starter neil Fernandes
- Start date
Re: 18rbx100 review
i got one more question - i was reading this other thread and that confused me (on that thread they were discussing a rectangular port).
the suggested box volume of 140 L, is this excluding the driver volume and port volume?
i got one more question - i was reading this other thread and that confused me (on that thread they were discussing a rectangular port).
the suggested box volume of 140 L, is this excluding the driver volume and port volume?
Re: 18rbx100 review
Doubling excursion is a (simulated) increase of 6 dB. 9.23-7.83 =1.4mm (almost 1 dB...) 1.4/9.23mm is a 15% difference. 15% of 6 dB is (approximately) one dB.
I don't use either WinISD or BassBox (Hornresp is my sim of choice), but the difference may be due to different impedance calculations, which would result in different power for a given voltage. At any rate, both produce smooth lines in charts, while real speaker's measurements wiggle around with (a lot) more than 1 dB variations, don't worry about small differences.
Neil,Thanks David and Art. Sorry for the delay in responding, i got busy over the weekend.
sorry about that question about the vent size, was just trying to make sure that i understand it correctly and i think i have
ok, moving to other questions -
which one is more closer to real performance for simulating a bass reflex in WinISD or BassBox?
the reason i ask this is because there is a slight difference (approximately 1db) between the fq. plot on WinISD and BassBox which i think is fine but the difference in cone excursion is almost 2mm. On winISD at 58.27hz it's 9.23mm and on BassBox at 59.76hz its 7.83mm.
Doubling excursion is a (simulated) increase of 6 dB. 9.23-7.83 =1.4mm (almost 1 dB...) 1.4/9.23mm is a 15% difference. 15% of 6 dB is (approximately) one dB.
I don't use either WinISD or BassBox (Hornresp is my sim of choice), but the difference may be due to different impedance calculations, which would result in different power for a given voltage. At any rate, both produce smooth lines in charts, while real speaker's measurements wiggle around with (a lot) more than 1 dB variations, don't worry about small differences.
Re: 18rbx100 review
Yup, the box volume in models or suggested designs is always the empty space after accounting for ports, drivers, bracing, handles etc.
Yup, the box volume in models or suggested designs is always the empty space after accounting for ports, drivers, bracing, handles etc.
Re: 18rbx100 review
Thank you Art, David and all that have helped with their valuable inputs.
I have everything almost ready and should start my build soon, just waiting for the drivers to arrive.
Thank you Art, David and all that have helped with their valuable inputs.
I have everything almost ready and should start my build soon, just waiting for the drivers to arrive.