How low can you go?

[wgscott]

I wonder if the 20 Hz or lower club is populated by the same people whose hearing extends above 18 kHz?

[Brazilº]

Ohm Walsh 5s are in series with 6 Ohm subwoofer drivers on the 2Ch side.

 

Multi-Ch has 2 JL Audio Fathom 113s. Freq response 19-200Hz (+1dB / -3dB)

 

JL Audio 113

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Ohm Subwoofer Cabinets

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The other cabinet is facing the oppostie direction.

 

No measurements have been taken. The JL subs are very musical...MVI recordings of Morph the Cat, The Nightfly or Kamakiriad get many hours of play here.

[Bob Stern]

Ohm Walsh 5s are in series with 6 Ohm subwoofer drivers on the 2Ch side.

 

Are you saying the left Walsh 5 is wired in series with the left subwoofer, and that the subwoofer has a 6 ohm input impedance?

[Brazilº]

Are you saying the left Walsh 5 is wired in series with the left subwoofer, and that the subwoofer has a 6 ohm input impedance?

 

In series must be the incorrect terminology.

 

The signal from the amps travels to the sub woofers first in a normal right/left wiring configuration then to the Walsh 5s

 

The #6 refers to the number of drivers, two per enclosure, not impedance. I sent John the room dimensions and he recommended the extra sub drivers and custom crossovers. The sub cabinets and drivers were purchased from Ohm...apologies for the confusion.

[Boris75]

I have a Cabasse Santorin 30 which does room correction. It comes with a mike, a tube mike pre-amp and some additional kit. What is nice also is that you can keep room correction settings for three different spots in the room.

[Boris75]

Could you who measured their room share with me how you did it with me?

 

I would be quite interested in measuring my kit and room, and I think I have more or less what I need: a Behringer ECM8000 measurement mike and a tube mike pre-amp in particular. But I need an audio card with XLR inputs that I could plug into an USB port on my Macbook (or my PC but I prefer the Macbook as otherwise getting the sound to output from my PC to my rig would be quite complicated - not unfeasible but tricky). This way I could check how effective the DSP in my Santorin 30 proves to be.

[Kiwi2]

(or my PC but I prefer the Macbook as otherwise getting the sound to output from my PC to my rig would be quite complicated - not unfeasible but tricky)

 

Sounds like you are already halfway there... Though one thing is you don't necessarily need audio out from the computer that is doing the measuring, as you could always download a pink noise track and play it on your main system and the other computer simply records your room's frequency response.

[Al Jones]

According to the Delos test CD, my stereo rig and surround setup both have useful extension below 20 Hz.

 

Stereo: 2 M&K Sound 350THX subs, each with two 12".

 

Surround: 1 M&K Sound 350THX sub

[stephenbrown2]

I am certain I can at least get to 16 Hz measured in my room.....two paradigm subs, wired for 240v (two separate circuits)

[firedog]

okay, so just got a copy of the Stereophile test CD which has tones to measure bass response. My speakers only roll off around 31hz, which is exactly acc'd to specs.

 

I was surprised to find that the volume rolloff isn't extreme - there is quite a bit of audible bass even at 20hz.

[ampsarus]

We are big pipe organ listeners. The Ohm 5000's while superb for the rest of the range simply don't fulfill the desire for a proper plumbing of the depths. A 32 ft. organ pipe's pitch is 16.4Hz. The next improvement will be subs and will probably be killer expensive as according to specs I've seen very few will go that low. And yes, I'll prolly need dsp too.

 

If you plan on reproducing those 32' pipes you will note that the wavelength of 17Hz is 65 feet.