Posted by Peter Krojgaard [ 130.225.37.97 ] on June 03, 2004 at 03:16:27:

Using McBeans HornResp program (and with the generous aid of others!), I am about to build a pair of large, straight 29 Hz bass horn. I use two 15" woofers (Precision Devices PD.158)for each horn in order to get the horn shorter. The throat size for the dual woofers is 720 cm2 wich is a little less than 1:2 (throat size:cone area).

In McBeans program you can see how the predicted output varies using different sizes of back chambers.

Now, for my particular horn, I get almost identical predicted outputs from McBeans program using back chambers between 100 and 140 liters for both woofers.

Does this mean that I just need to get the size of the back chamber within this interval, or can I get a more precise 'quess' regarding optimal back chamber size based on 'reactance annulling' (which I unfortunately do not know about)?

If the latter is the case, I would really appreciate if someone could tell me how to achieve 'reactance annuling'!

I thank you a lot in anticipation!

Regards
Peter Krojgaard

Replies:

• Re: How do you calculate the optimal back chamber size for a frontloaded bass horn? - Bill Fitzmaurice 06:31:02 06/03/04 (3)
  • Thanks a lot and a few more questions! - Peter Krojgaard 11:36:02 06/03/04 (2)
    • Re: Thanks a lot and a few more questions! - Bill Fitzmaurice 12:35:14 06/03/04 (1)
      • Re: Thanks a lot and a few more questions! - Peter Krojgaard 13:58:47 06/03/04 (0)