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Older Activity
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Today, 10:06 AM
I've been trying to find a pic of his steel bracing (also double walled), my favorite; but my links are dead.
It's good for research for someone...
17 replies | 825 view(s)
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Today, 09:29 AM
Thanks Bryan. I really appreciate that. These truly are a back breaking effort, and I'm not kidding. My back is really aching after lugging these...
53 replies | 3346 view(s)
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Today, 02:06 AM
I'm having problems seeing this pic linked from AudioCircle.
So here's the same shot uploaded to PE directly.
53 replies | 3346 view(s)
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Today, 01:11 AM
That's the correct layout.
The original pic at the start of the thread was definitely not going to work.
26 replies | 233 view(s)
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Yesterday, 07:25 PM
You mean the problem's not just balloons for birthday parties and people making funny voices? ;)
27 replies | 503 view(s)
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Yesterday, 05:54 PM
Do you know why? We're actually running into short supply of Helium, and it's just going to keep getting worse.
27 replies | 503 view(s)
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Yesterday, 05:16 PM
What happens here is this - Qes is a measurement of electromagnetic damping of the driver's resonance. This is directly related to the amount of...
10 replies | 247 view(s)
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Yesterday, 05:06 PM
Very sad news indeed. What a tragedy, he was much too young.
17 replies | 825 view(s)
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Yesterday, 11:51 AM
Phone pics . . . Finally painted. We install drivers today and get some measurements.
53 replies | 3346 view(s)
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05-22-2013, 11:52 PM
I'm building this amp for a Taiwanese company and they provided the heatsink and chassis for the prototype. I know I saw a nice chassis and heatsink...
13 replies | 319 view(s)
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05-22-2013, 11:44 PM
:D Good one!
Not only that, but the amp circuit includes active line filters that will reduce the 120Hz ripple by another 40dB.
13 replies | 319 view(s)
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05-22-2013, 10:02 PM
MOSFET.
Final bias level will be determined by what I consider to be a reasonable heat sink temperature. I've got 12 MOSFETs on each channel, so...
13 replies | 319 view(s)
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05-22-2013, 09:33 PM
Not sure where you saw that, but it's my own design. Class A/B, 250W. I'm aiming the bias to allow maybe 50W of class A operation before it reverts...
13 replies | 319 view(s)
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05-22-2013, 08:55 PM
For you amplifier lovers, here's a bit of :eek:
That's a quarter on the one power transformer.
I've got some work to do.
:D
13 replies | 319 view(s)
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05-22-2013, 07:51 PM
I did.
"Few tweeters will last long with sustained power at a level easily achieved with an overdriven 100W amplifier - they are simply not ...
41 replies | 844 view(s)
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05-22-2013, 06:21 PM
That's the point Frank. With MUSIC as the signal, the 100W amp delivering 50W RMS will be horribly distorted compared to the 500W amp delivering the...
41 replies | 844 view(s)
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05-22-2013, 05:14 PM
The difference is that with MUSIC as the signal, the amount of high frequency power is MUCH lower in the unclipped 50W signal.
50W RMS being...
41 replies | 844 view(s)
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05-22-2013, 04:33 PM
The blue paragraph is incorrect. If you drive both coils, whether in series, parallel, or if you drive both coils separately via two different...
10 replies | 247 view(s)
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05-22-2013, 10:23 AM
Get some cut with MDF and wrap them in vinyl. They make vinyl in all kinds of metallic look, including chrome.
51 replies | 5525 view(s)
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05-22-2013, 03:31 AM
xsundown, where do you live?
There may be a DIY'er nearby who would be glad to come by with a mic and woofer tester and actually design you a...
35 replies | 526 view(s)
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05-22-2013, 03:20 AM
I think that's backward IMO. An amp in clipping sounds louder than an amp not in clipping due to the extra harmonic content that is easily perceived...
41 replies | 844 view(s)
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05-21-2013, 11:47 PM
LMAO
How many vehicles can you hit in one intersection before leaving the pavement altogether?
http://www.liveleak.com/view?i=af1_1369050002
6 replies | 399 view(s)
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05-21-2013, 11:33 PM
That's the actual spectral content not limited by digital sampling rates.
The first plot has peaks just under the voltage rail of the amp. The...
41 replies | 844 view(s)
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05-21-2013, 10:42 PM
10 parts.
5 for the woofer and 5 for the tweeter.
Woofer:
2.7mH
5.6uF
.3mH
125uF
9 Ohm
35 replies | 526 view(s)
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05-21-2013, 10:37 PM
I'll let the readers decide which has more high frequency information.
Guess which plot is clipped.
41 replies | 844 view(s)
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05-21-2013, 09:21 PM
One more thing - I can send you the frd files for the woofer and the passive radiator if you want to load them into something and sum them yourself. ...
50 replies | 1094 view(s)
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05-21-2013, 08:51 PM
Do you like the way we hid something useful and informative in a thread no one sees?
50 replies | 1094 view(s)
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05-21-2013, 08:50 PM
It's the latter. You can see all of that in this graph:
50 replies | 1094 view(s)
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05-21-2013, 08:43 PM
;) Several years ago on the old Mad board Dave Ellis posted that everytime he ate popcorn and listened to music everything about the music sounded...
50 replies | 1094 view(s)
About jkrutke
- Biography:
- A hoopy frood who always knows where his towel is.
- Location:
- ZZ9 Plural Z Alpha; 2nd home in Wisconsin
- Interests:
- Music, speakers, biking, running, swimming, movies, mixed martial arts, video games, food
- Occupation:
- Mechanical Engineer
Total Posts
- Total Posts
- 549
- Posts Per Day
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General Information
- Join Date
- 10-07-2005
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