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Old 23rd July 2006, 04:24 AM   #21
maxro is offline maxro  Canada
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A quote from Bob's report: "The most impotent effect of the phase plugs..."

Dave, you will have to let your customers know about possible serious side-effects of these plugs.

Max
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Old 23rd July 2006, 05:48 AM   #22
Dumbass is offline Dumbass  British Antarctic Territory
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Quote:
Originally posted by maxro
A quote from Bob's report: "The most impotent effect of the phase plugs..."

Dave, you will have to let your customers know about possible serious side-effects of these plugs.
Just don't cram them into your ringpiece.

I once made that mistake.
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Old 23rd July 2006, 07:10 AM   #23
ssmith is offline ssmith  France
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Originally posted by Scottmoose
Join the club. I'm looking forward to getting mine. Pity about the phase plugs, but the other tweaks Dave does should more than compensate.
Scottmoose,
What you planning to put your FE126E's in?
I'll be trying the frugel horn...
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Old 23rd July 2006, 07:46 AM   #24
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Hi JandG!
How do they sound without dust caps?
BTW, I have same problem in the mornings. Without coffe, no life signs here.

Regards Peter
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Old 23rd July 2006, 07:57 AM   #25
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Sorry, forgot my manners. Dave and Terry, thanks for the replies.
Didn`t finish my coffe
Peter
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Old 23rd July 2006, 10:31 AM   #26
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Very interesting write-up and measurements Bob. I like a warmer balance myself, so I can see why I like these things. Your description appears to coincide with my own experiences. Be interesting to see what different lengths etc would do, as you say.

I'll be putting the 126s into Frugels ultimately, but I'll be trying out a couple of other ideas first -I'm currently fooling around in MathCad to get the details finalised. Will let you know once I'm 100% happy.
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Old 23rd July 2006, 11:17 AM   #27
MJK is offline MJK  United States
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Quote:
My fe167e's in healthy BR monitors are under 100hrs & edge with shout & just to forward..
Are you using a BSC filter? If not then I don't think the phase plugs will completely cure your problems. They might help but won't make up for a 3 to 4 dB loose of bass output, that is what really causes a speaker to shout.
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Old 23rd July 2006, 02:12 PM   #28
JandG is offline JandG  United States
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No BSC, I don't even know what one is, I will have to do a search., ..The speaker measure's internaly @ W-7.25" D-10" T-17.5" port is 3"round x 4.5 deep in front below 167. Also a 2.75" x 3/4" brace @ 8.5" @ centered from top. Baffle is 1" thick. fe167e is not recessed, the port flare is recessed. I am new to DIY speakers but not other area's of DIY audio. I am done with all & any commercial offerings in speakers.................
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Old 23rd July 2006, 03:53 PM   #29
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A BSC circuit is a small passive circuit between amplifier and speaker driver that compensates for the 3-4db loss in output below a certain frequency caused by baffle diffraction. The specific frequency at which this occurs depends on the width of the front baffle.

Typically, a BSC circuit consists of an inductor and a resistor paralleled in the + lead to the driver, sometimes with a Zobel network (a capacitor and resistor in series connected between the + and - leads) added. Not to be confused with adding series resistance, which is sometimes done for various reasons, but usually to prevent an amplifier over-damping a low Q driver.
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Old 23rd July 2006, 04:31 PM   #30
JandG is offline JandG  United States
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Thank you, I actually understood that..Very helpfull ....
J & G
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