Maybe...I'm not convince that a flat response is the be all and end all. I have a pair of 8" full-range speakers that are dead flat from like 60 to 20K and they sound...well...flat compared to these.
I'll be bi-amping them soon through a Behringer 2496 and I'll see what I can do with that. I'll be able to control the attenuation, XO freq. &XO slope. I want to listen to it for a while as is so I can get a frame of reference inbedded in my ears.
How do you get 60-20 kHz flat with a single driver without mass quantities of EQ that will likely 'suck the life out' of it?
Regardless, tonally flattening out a woofer/horn through the XO BW, then using a by-pass cap to let the highs through unattenuated won't make them either 'dead' flat or sound flat in mine and many others experience. Basically, you're just using passive components to mimic the effect of driving them with a very high output impedance once the proper shelving has been applied.
As to how much usable HF extension you can get will depend a lot on the grill cloth density.
GM
Loud is Beautiful if it's Clean! As always though, the usual disclaimers apply to this post's contents.
Hi GM,
I know Alan has moved house ( & is now quite busy with everything that implies ) and ( HiFi wise ) is generally just digging his tube driven ( modernized ) Valencias .
FWIW, earlier in this thread Alan built up a 30923 HF contour network, ( at least partly on my encouragement ) .
AFAIK, Alan has yet to test it with his GPA 802s. I figure he'll get around to that at some point ( assuming his curiosity gets the better of him ) .
Alan ?
Last edited by Earl K; January 17th, 2013 at 09:04 AM.
Greets!Originally Posted by Earl K
Ah! OK, missed this in a quick scan, though the old grill cloth density may ideally need different component specs. Of course, it's a good starting point for 'voicing'.
GM
Loud is Beautiful if it's Clean! As always though, the usual disclaimers apply to this post's contents.
Ooops, I misses this post, Earl. Yes, I still have the 30923 modules, just haven't installed them yet. There is so much that needs to be done first. I need to find the best place for the Heathkits and the sub for proper bass response. I find that even a few inches foward or back or a few degrees of twist right to left can make a difference in a 60Hz peak or suckout.Hi GM,
I know Alan has moved house ( & is now quite busy with everything that implies ) and ( HiFi wise ) is generally just digging his tube driven ( modernized ) Valencias .
FWIW, earlier in this thread Alan built up a 30923 HF contour network, ( at least partly on my encouragement ) .
AFAIK, Alan has yet to test it with his GPA 802s. I figure he'll get around to that at some point ( assuming his curiosity gets the better of him ) .
Alan ?
I also have to buy some area rugs since everything is on hardwood floors now as well as window treatments since I have bare windows and sliding doors right in the first reflection points. So there is much to do and buy before I get this really start measuring and getting things nailed down.
Here's a pic of my current, make-shift set up so far: Untitled | Flickr - Photo Sharing!
As you can see...lots to do.
Oh wow! Your basic acoustical nightmare! Ideally, jacking the speakers up is going to be required too, not to mention getting rid of the coffee table, a huge early 1st reflection zone in the worst place possible. Really, long term, you need to use the components in a DIY tower/column [aka MLTL] to overcome many of this room's core problems.
GM
Loud is Beautiful if it's Clean! As always though, the usual disclaimers apply to this post's contents.
I have new cabs on the midterm plan. Not that I don't appreciate the vintage Heathkit look, but...I think I want to separate and dampen the 811s from the 416s ala Model 19s. I am willing to sacrifice vintage for sonic improvement.
Second, here are some more shots of the space empty IMG_1734 | Flickr - Photo Sharing! . Click the "Older" button on top to flip through a few images.
The good news is it sounds reasonably OK. The open space allows the LF waves to stretch out a bit. The fireplace, doors and windows need acoustic treatments as does the cathedral ceiling. I'll build some when I get my shop set up in the garage. Right now it's filled with boxes that need unpacking. My other obtacle is I have a new puppy in the house, so new area rugs are not in the cards for a month or two.
I like the fact that with the volume control on 1 with a 15W/ch amp I get sound filling the entire house. On 3 you have to raise you voice to be heard 5' away.
Now that I have furniture and bookshelves in I don't get much slapback any longer. It looks worse than it sounds.
Oh yeah...and that raised platform the speakers are on, it's hollow underneath!
Last edited by alancohen; January 17th, 2013 at 12:48 PM.
Posting Permissions
Bookmarks