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回覆 (131): Knowledge is Power lor!
 
Is this the same book ??  
 
http://www.amazon.com/Valve-Amplifiers-Third-Edition-Morgan/dp/0750656948
Cadiver
12-08-01
01:29:53
回覆 (130): Knowledge is Power lor!
For those who are standing in cross road not sure of getting a copy. The fourth edition has fewer circuit than the previous three editions. In this latest edition, it seems unavoidable for him not to get into the slightly more technical anlysis and equations to describe how a valve amp actually work.  
 
The book is circle around valve and its application in audio amplication but he is not blindly committed to anything valve. i.e, he doesnt like valve regulator, he is more into push pull than SE. He doesnt like mercury recitifier. This one is not good news lor!  
 
If you are a diyer or want to get into diy. This is a good book for you. If you are no diyer. Its a good book too. Simply because some of the topics can save million of dollars from buying the wrong stuff.  
 
Someone can correct me. OK. Audio highhand may not find it interesting to read if you are completely against valve amp!  
 
bobui
12-07-31
17:45:14
回覆 (129): Knowledge is Power lor!
i got the ebook version quite sometime ago. still quite a few typo in there. and it is not available under kindle but it more convenient.
drwkng
12-07-31
16:49:39
回覆 (129): 小師妹 prefer this from 小師兄
小師妹: Oh! 小師兄呀, Up and below is OK. Front and back is not OK for me.  
小師兄: That's fine with me. I can live with that.  
小師妹: You sure? There seems to be a growing trend that you guys just love the front and back.  
小師兄: I mean, the only real difference is that the front is more open and spacious and the back is always a little bit more......................you know, more depth!  
小師妹: Oh! 小師兄呀, I like 呀! You always give me so much more.  
小師兄: So, how about this now? I have just pushed in another inch?  
小師妹: Oh Oh! Almost la! I can feel it la. Its coming so much stronger. I like呀. Can you try just a little harder please?  
小師兄: No more, no more. I think I am done la.  
小師兄: If I push the speaker in a little further, you will lose that sound stage. You know, the front and back effect you longing for. And the below, I mean the bass note and the up, I mean the treble should be well extended and filling up the entire listening room lor.  
小師妹: OK! OK! Why you only have Hi Fi in your mind. So boring lor!  
 
bobui
12-07-31
15:52:19
回覆 (128): Knowledge is Power lor!
Need not to say more about the author la! Bought from bay watch and arrived on my desk yesteday from UK post. Watch out the pricing difference between sellers. You shouldnt need to pay more than 40 pounds for a paperback copy. Some sellers are asking for 80+ pounds.  
 
In its fourth edition. Total 700 pages. Nice new topic includes a Chapter on Dynamic Range: Distortion and Noise. A balanced Hybrid RIAA circuit. And finally, a short Chapter on SE amp.  
 
bobui
12-07-31
11:12:09
回覆 (127): mods on X'over
Icefox,  
 
Brother Wei's big massive horns remind me of 大煉鋼, all he need are some red flags and "big letter poster" to move the room's atmosphere from the 1950s to 1970s :D  
 
Brother Keung & Horn King is very scientific, with audio analyzer to set up their systems.
Willleung
12-07-26
22:40:01
回覆 (126): mods on X'over
thekong's grandpa this Saturday  
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Much appreciated for the invite. Yes, i will be joining in the morning. As for any further activities after lunch. I need approval from my CEO. Its kind of grey and miserable outside, not the best time to send application.  
 
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Layout of the new crossover looks reasonable & great. Many times layout of the original one may look crappy  
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Thats encouraging. Danke!  
 
No to my surprise! The original layout was rather ok but the component quality wasn't very attractive lor. Very terrible indeed! However messy it may look, the layout wasnt crappy at all. The original layout have all the coils at 90 degree crossing. No coils were parallel to each other. It does look a bit messy but thats the whole point. Is to avoid magnetic interference. And even the caps were at 90 degree crossing.  
 
 
 
bobui
12-07-25
15:15:51
回覆 (125): mods on X'over
 
 
me bringing my AVO over. Cant wait for the grand visit  
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Anytime my friend. Just come to Sat lunch and I'll be at your service.  
 
Have you any idea what a BIG sound is like? I'll be visiting thekong's grandpa this Saturday. Join me if you can.  
 
 
limage
12-07-25
14:18:45
回覆 (124): mods on X'over
Layout of the new crossover looks reasonable & great. Many times layout of the original one may look crappy, but sometimes it's crappy layout, components here & there without any sense that create magic. Just in case, the new crossover let you down, try rearrange the components to mimic that of the crappy original.
Derek2A3
12-07-25
13:52:55
回覆 (123): mods on X'over
speaker placement is the damn thing that makes or breaks.  
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I am completely empty when it comes to room acoustic and speaker placement. In fact, what i am doing now with the Leak 3090 crossover is as I see it, a new opening chapter for me learn and play around on how to max out a pair of large domestic multi units speakers in an average size den.  
 
 
Remember we talked about me bringing my AVO over. Cant wait for the grand visit.  
 
 
bobui
12-07-25
12:41:04
回覆 (122): mods on X'over
 
 
I can feel it coming! And is coming fast!  
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Good, that's the singular item I would earnestly ask of you. Believe me please, speaker placement is the damn thing that makes or breaks.  
 
 
limage
12-07-25
12:09:02
回覆 (121): mods on X'over
For example, when you've finally clocked the best position for your speakers, everything has to be re-started from square one.  
 
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I can feel it coming! And is coming fast!
bobui
12-07-25
11:46:20
回覆 (121): mods on X'over
The original caps uf were mostly exceed 50% than their design values. No way i can trust them to do their jobs anymore. The rebuild i am having is based on a new platform and i am keeping the original one for later comparsion. At least i am doing one thing not incorrect so far, right?  
 
Its such a risky business to fiddle around with crossover. Oh, my god! What am I doing??? You know this TV adv from a lady cosmetic brand "FANCL" . Remember their tag line - "LESS IS MORE". Thats how i feel about this crossover rebuild right now.  
 
The trouble is I am just not too sure if I am doing too less or too more. I hate speaker designers. They earn the most in dollar and offer the less in responsiblity and improvement.
bobui
12-07-25
11:29:36
回覆 (120): mods on X'over
 
 
when your audio feat improves.  
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For example, when you've finally clocked the best position for your speakers, everything has to be re-started from square one.  
 
limage
12-07-25
11:09:57
回覆 (119): mods on X'over
 
 
When you work on crossovers, it's good practice to keep the original intact. Chances are that you may find the original better when your audio feat improves.  
 
 
limage
12-07-25
11:03:15
回覆 (118): Gigantic DIY Mega Horn Systems
OK Ok, dont panic! Right? Any suggestions on caps for crossover? Can I keep the Solen coils? Allow me please!  
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solen coils are qutie good. but those caps are really bad. solen have tin foil caps which are quite good.
drwkng
12-07-25
11:01:22
回覆 (117): Gigantic DIY Mega Horn Systems
get rid of those solens. they are only good for trash^-^  
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Ahhhhhhhh! This little shit is pretty much done. What should I do now?  
 
OK Ok, dont panic! Right? Any suggestions on caps for crossover? Can I keep the Solen coils? Allow me please!
bobui
12-07-25
10:55:53
回覆 (116): Gigantic DIY Mega Horn Systems
get rid of those solens. they are only good for trash^-^
drwkng
12-07-25
10:44:58
回覆 (115): Gigantic DIY Mega Horn Systems
I am almost 200% sure that is NOT the path for me. Being a lazy bastard, it's just way too much work with highly questionable returns.  
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You are not alone, my friend!  
 
I am 20000% certain that electronic crossover and big DIY multi-horns never can within my knowledge of understanding.  
 
"Its scary when you have to deal with something you don't understand"  
 
Speaking of crossover, I am working on a complete crossover rebuild for my Leak 3090. Its almost done now. And to be honest, I can assure you that its no fun at all. Its one of the worst soldering expereience i ever had in my entire DIY audio life. Its utterly boring. Its very expensive. Its time consuming. Once done, its hidden away and even if it doesnt, it aint sexy to look at. And is almost impossible to conduct any scientific measures at my little den.  
 
All new coil mH and cap values were indentical to the original design. I even measured the coil resistance to make sure not much ohms deviation to the originals. Nothing too fancy or exotic. Just Solen mult-strand coil and caps. All wiring were Supra multi-strand. No silver wiring or alien space ship materials. No WBT la and no flat wire coil lor! A coil is a coil, why introduce a capacitor within!  
 
Share with you more on LISTENING test in about a week. And do give me a shout if you have something to share!
bobui
12-07-25
10:25:58
回覆 (114): Gigantic DIY Mega Horn Systems
This is the amplification used. Another surprise, matching of this valve application with the Cello Suite Preamp is indeed quite a lovable combo.  
icefox
12-07-25
09:18:35
回覆 (113): Gigantic DIY Mega Horn Systems
this is a hobby. the worse sound you get the more fun you will have since you will start all over again and again and again.  
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This is a very thought-provoking statement indeed.  
 
For the sake of 搞,looks no further multi-way, multi-driver, electronic crossover system is the way to go. However, as a key take away for this trip, I am almost 200% sure that is NOT the path for me. Being a lazy bastard, it's just way too much work with highly questionable returns.  
 
On that respect, I walked away with great curiosity on the magic behind the Legacy's loudspeakers design. Being a 4 ways, multi-driver speaker system, it managed to behave extremely power efficient. This system is capable of being driven by a 10W parallel SE 300B amplification without sounding like energy deficient, for a tiny bit, even on large and complex passage.  
 
p.s. For those who would be interested in seeing more photos of the trip, you can use the link below where you could find some more professional photographic inputs from another teammates. My photography sucks and I am just too lazy in posting.
http://www.hiendy.com/hififorum/forum.php?mod=viewthread&tid=7480&extra=page%3D1&page=198
icefox
12-07-25
09:03:16
回覆 (112): Gigantic DIY Mega Horn Systems
 
 
The room itself??? Well..... I don't know  
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The purpose of this design, progressive width borrowed from the Japanese, is to get rid of room resonances, but I'll bet that the designer must have the vision of making this big room a huge horn as well.  
 
A good trial and error, nevertheless.  
 
limage
12-07-24
15:50:19
回覆 (111): Gigantic DIY Mega Horn Systems
this is a hobby. the worse sound you get the more fun you will have since you will start all over again and again and again.
drwkng
12-07-24
15:42:49
回覆 (110): Gigantic DIY Mega Horn Systems
Friends let's take it easy.... ^__^!!!  
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The thing is you were having fun with huge .......this and giant .......that. We were here looking at our 16" monitor and listening to wee size computer speakers!  
 
Very different life style lor!
bobui
12-07-24
15:36:56
回覆 (109): Gigantic DIY Mega Horn Systems
Friends let's take it easy.... ^__^!!!  
 
In this mega system, the nicest surprise for me is this ......  
 
icefox
12-07-24
15:21:30
回覆 (108): Gigantic DIY Mega Horn Systems
原來捨號角而轉投障板!  
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Not exactly true, the current setup is only transitional, it will be changed to another loudspeaker system shortly.
icefox
12-07-24
15:18:20
回覆 (108): Gigantic DIY Mega Horn Systems
so it will be more like pressure than sound waves.  
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Ah, I see and that remind me of the floor firing bass units in many 7.1 system. They were built to shake the earth and make your butt vibriate!
bobui
12-07-24
15:15:04
回覆 (107): Gigantic DIY Mega Horn Systems
Am I correct to say that sound travel through air, not concrete, right?  
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it shouldn't matter. it is bass we are talking about. so it will be more like pressure than sound waves.
drwkng
12-07-24
15:09:19
回覆 (106): Gigantic DIY Mega Horn Systems
the speaker units looks kind of small comparing to the enclosure.  
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and the people look kind of tiny comparing to the enclosure.  
 
Actually I am curious of the huge amount of cabniet space above the treble unit which press the bass units down almost sitting on the floor. Am I correct to say that sound travel through air, not concrete, right?  
 
 
 
 
bobui
12-07-24
15:05:09
回覆 (110): Gigantic DIY Mega Horn Systems
個場咁 Q大,障板得唔得?  
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during the actual audition, there might be free earhpones dished out.
drwkng
12-07-24
15:04:49
回覆 (109): Gigantic DIY Mega Horn Systems
The room itself??? Well..... I don't know.  
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this makes my day!
drwkng
12-07-24
15:03:46
回覆 (107): Gigantic DIY Mega Horn Systems
 
 
原來捨號角而轉投障板!  
 
個場咁 Q大,障板得唔得?  
 
limage
12-07-24
15:02:37
回覆 (108): Gigantic DIY Mega Horn Systems
oh! where is the horn?  
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The room itself??? Well..... I don't know.
icefox
12-07-24
14:56:40
回覆 (107): Gigantic DIY Mega Horn Systems
oh! where is the horn?
drwkng
12-07-24
14:53:43
回覆 (106): Gigantic DIY Mega Horn Systems
the speaker units looks kind of small comparing to the enclosure.  
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You may find the answer in this photo.
icefox
12-07-24
14:51:45
回覆 (105): Gigantic DIY Mega Horn Systems
the speaker units looks kind of small comparing to the enclosure.
drwkng
12-07-24
14:45:45
回覆 (104): Gigantic DIY Mega Horn Systems
limage
12-07-24
12:33:59
回覆 (103): Gigantic DIY Mega Horn Systems
 
 
整容後  
 
整容前  
 
 
limage
12-07-24
12:33:34
回覆 (102): Gigantic DIY Mega Horn Systems
To me, one of the nicest surprise is a chance auditioning this system, a system with a pair of Legacy speakers.  
 
icefox
12-07-23
15:31:24
回覆 (101): Gigantic DIY Mega Horn Systems
We warp up the trip with another gigantic setup, 王總‘s brand new setup in another location!  
 
icefox
12-07-23
15:23:29