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  #1  
Old 27th February 2007, 05:27 PM
graeme
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Default WD25A crossover tweeking

Has anyone tried any tweeks to these yet?

i'd like slightly more bass as its a little quiet in the mix for me.

The article suggests swapping L1, the coil in series with the bass unit (normaly 0.58mH) for one of 0.6mH for a 'darker, heavier bass perormance'

Sounds like this might be worth a try. Has anyone else played with this?

Ive been considering buying an active sub, but i dont want THAT much more bass Just a little more.
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  #2  
Old 27th February 2007, 06:23 PM
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naimart naimart is offline
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Default Re: WD25A crossover tweeking

Graeme,
Do you have the series 3 crossover or the the series 4?

I seem to remember you where building the WD25a around the same time as I had bought mine - my kit (around May 2006) contained a series 3 crossover which has a slightly lighter balance. I think the WD25a is superb but like you wanted a little more bass. It's a long story but I now have both, a series 3 and a series 4 version of the WD25a - and I have used them with a small active sub. Currently I prefer the series 3 with the sub in my particular room and system - but there is not much in it.
Regards
Robert
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  #3  
Old 27th February 2007, 06:28 PM
graeme
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Default Re: WD25A crossover tweeking

Im not sure what crossover i have, is there an easy visual check?
If so, ill pull it out and get back to you.
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  #4  
Old 27th February 2007, 06:36 PM
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naimart naimart is offline
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Default Re: WD25A crossover tweeking

If you contact Nick at WD they will be able to tell you from the order - would save any dismantling!
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  #5  
Old 27th February 2007, 06:55 PM
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Cobblers Cobblers is offline
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Default Re: WD25A crossover tweeking

Before playing with the crossover why not try tweaking the stands?

I have raised my WD25a's on higher stands (22 inches tall for those it may concern maybe not making for high WAF!).
Despite theoretically getting less Bass, I prefer the bass now as it is even cleaner, with notably better defined soundstaging than before (and as you may have noticed I thought it was pretty damned fine on the open frame stands)
Bass seems stronger (it is obviously even better defined) without any of the one note bass I detest.

These old Apollo stands are sand filled twin pillar high ('ish) mass (sorry Petercom!) and it hasn't slowed the pace or blurred definition in my room at all. Different results may be achieved with a concrete floor.
I filled these old things with sand years ago and added a wider chunky wood base for stability. Metal base plate is decoupled from the stand with cork, which stops the bolts loosening because of constant tension on them) .

It could be that even better results could be achieved if the stands were just damped with something light as recommended by Petercom.
It could be merely that it sounds better with the cleaner output from the bass driver away from the floor on the higher stands. I imagine this would lead to even lighter bass though, which is not Graeme's objective.
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  #6  
Old 27th February 2007, 07:45 PM
Ianm2 Ianm2 is offline
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Default Re: WD25A crossover tweeking

just a suggestion if it hasn't occured, why don't you build your xovers in external boxes, or better for ascertaining, on a flat board of mdf or anything improvised?

so you can try all of the xovers, or even tweak yourself, with cheap components at first, see what you prefer, and then you can spend money on your fave parts for the preferred version?

Its illogical to keep 'opening them up' if you want to change things

check out "solen" on how to layout a xover board spatially
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  #7  
Old 27th February 2007, 08:41 PM
graeme
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Default Re: WD25A crossover tweeking

For stands, at the monent, i built a simple mdf pillar, about an inch smaller than the speaker. They are filled with expanding foam so there very dead.

In theory, these should be bolstering the bass to a certain extent. I can here a slight boom but only very rarely (one or two tracks on cd which are very bass heavy with lots of sub bass)

Im sure stands that were more frame like, without the front baffle effect would improve bass sound, but not increase it.

If i mod the crossovers i will probably mount them seperate anyway.

With some of my music the bass is fine, more than fine really, but on some music i have which is supposed to be bass heavy it just sound week. Bass extension doeant reach down quite far enough and it doesnt have enough punch.

What is super anoying is i have a track with a deep punching bass line and the vocal sample says 'is this bass really strong enough' (intended to be ironic) but im left siting there thinking no, not really

Im not looking for much more, just a little more punch which will probably make it sound more extended as well anyway.

I guess crossover mods are worth trying before i commit to a sub.

Im assuming its not the kel84 at fault?
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  #8  
Old 27th February 2007, 08:51 PM
Ianm2 Ianm2 is offline
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Default Re: WD25A crossover tweeking

sometimes its actually the mix, in that the engineer or the compressor actually kicks in to 'withold' some part and let another to the fore. Are you sure its the spx 'voicing'?
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  #9  
Old 27th February 2007, 09:17 PM
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Cobblers Cobblers is offline
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Default Re: WD25A crossover tweeking

WD25a's are supposed to be accurate speakers.
I think Music like Dub bass relies to a certain extent on the exaggerated unrealistic upper Bass boom (which most people mistake for deep or subsonic bass) of most speakers and can lack something with more accurate flat bass response speakers.

A high mass sand filled stand would bolster the bass slightly, why not try this?

If you want both accuracy for most material and slam for tecno stuff why not get a sub (or two) and set the sub crossover frequency fairly high (80hz)for that kind of material, and switch it off for acoustic music.
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  #10  
Old 27th February 2007, 09:50 PM
Ianm2 Ianm2 is offline
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Default Re: WD25A crossover tweeking

of all hifi words, I think accurate is the most disagreeable, AND contentious(just one of my pet peeves)
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