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Which sub? Black Friday specials calling ...
Which sub? Black Friday specials calling ...
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Old 24th November 2017, 12:20 PM   #1
rhubarb9999 is offline rhubarb9999  United States
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Default Which sub? Black Friday specials calling ...

I am ready to pick the bottom end of my active 4 way. The RSS390HO and HF are both on sale for Black Friday .. so its going to be one of them. But which one?

The cabinet will be up to 5.1 cubic feet. I can reduce the amount of internal volume, but the cabinet dimensions are fixed at 16.5x30x23. I would like to do a rectangular port on the front .. not necessarily a slot port using walls of the cabinet. I'm thinking the port will be around 15" long and 3" tall. This driver will cross over to a 10" RS270 around 100Hz. The room is 20x20. 99% music use.

So .. which driver? Cabinet volume too big? Internal length of port?
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Old 24th November 2017, 01:56 PM   #2
rhubarb9999 is offline rhubarb9999  United States
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Playing with WinISD ...

It shows the HF in 140 liters .. 2x11 port that is 18.7 inches long. Tuning to 23Hz. It looks pretty good (if I am doing it right). There is a bump at 35Hz that I can EQ out.

Does this sound reasonable?
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Old 24th November 2017, 02:23 PM   #3
chris661 is offline chris661  United Kingdom
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Sounds about right for those drivers. Post screenshots and we'll have a look.

Chris
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Old 26th November 2017, 09:22 PM   #4
rhubarb9999 is offline rhubarb9999  United States
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I pulled the trigger on a pair of the 'HF' drivers. The subs are going to be part of the 'tower' so placement is not really something I can change. However, since the entire system is active, I can EQ the room as flat as possible.

Power is from a Carver PM-900 so I have 450 watts per side to play with
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Old 30th November 2017, 12:38 AM   #5
rhubarb9999 is offline rhubarb9999  United States
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60 pounds of subwoofer arrived today

Weather looks good to make some sawdust this weekend!
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Old 30th November 2017, 04:36 AM   #6
norman bates is offline norman bates  United States
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Join Date: Nov 2003
Location: iowa
Based on listed specs...............
Speaker Stats
fs 19.5 hz
vas 7.5 ft3
qts 0.43


sealed Qtc .707
VB = 4.40 Ft3 (each)
fsb = 32.06 hz
F3 = 32.07 hz

I've wanted to try them in a push pull sealed..................
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Old 3rd December 2017, 02:28 AM   #7
rhubarb9999 is offline rhubarb9999  United States
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So I built the frame of the woofer boxes today .. wound up with 160 liters. I reworked everything in BBPro and WinISD. I come up with a 2"x11" port between 17.5 and 18.5" long. Fb= 22Hz.

Does this look about right? I am not trying to reach into the teens .. this is for music only. Also, because the entire system is active, I can apply some EQ from the MiniDSP to smooth things out or dig a little deeper.

Is it soup?
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