- #1 [niceman], 14-03-22 23:39
- #2 [icefox_2001], 14-03-23 09:59How about this?
- #3 [Dynavector], 14-03-23 10:20
44+405=excellence. -
- #4 [icefox_2001], 14-03-23 10:2944+405=excellence.
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This surely is a very tasteful and sensible recommendation. However, the gent wants a valve amp. But it really couldn't go wrong with 44. - #5 [Dynavector], 14-03-23 14:13
22+II
33+303
44+405
+) 66+606
------------------
= Excellence
==================
The old UK Quad couldn't go wrong! kakakakaka.
Go out for a walk and enjoy the Beautiful Sunday! Have a nice and sunny day!
最後修改時間: 2014-03-23 14:17:08 - #6 [icefox_2001], 14-03-23 22:5222+II
33+303
44+405
+) 66+606
------------------
= Excellence
______________________
What would be your pick for 50E then??? - #7 [Dynavector], 14-03-23 23:1622
- #8 [軍城], 14-03-24 00:2022要做個POWER SUPPLY比佢
搵部狀態好嘅DYNACO啦
- #9 [alphability], 14-03-24 08:09十數年前用Sonic Frontiers SFL-1 推QUAD 405.2及 LS 3/5a
高音可以比QUAD44靚D, 記得QUAD 405.2 是反相，喇叭正負最好用 TEST CD及您對耳去收貨
後來幾年前花時間RECAP時，改opamp
發現QUAD的opamp放大太勁，太依賴opamp放大
https://www.review33.com/avforum/forum_message.php?topic=12090324162805
RECAP改opamp後, 用PASS DIY BUFFER PRE AMP
聲音到極點，極度MUSICAL!!! - #10 [shungyan], 14-03-25 01:05ching 們所言甚是! 小弟用的是405! recap後也改的些内接線! 聲音便比較現代化了! 機内的opamp 就是聲音之靈魂! 要唔同聲只须要換過粒opamp 就得! 很有趣! 甚麽胆前我不太會! 甚麽也不太差吧! 這後級就强! 有朋友用diy convergence 胆前! 效果很不錯! 留意一下，405 input sensitivity 係0.5v! 别外左405 的lm301 不能直用到405-2! 但就個人而言，初代的lm301 (74 年出品) 和剛遇到的77年koera 出品，真是極品!
- #11 [leicam6classic], 14-04-16 11:18好想玩膽前+405-2做後級，但通常低噪好大，想問alphability兄，加Sonic Frontiers SFL-1 有沒有這問題? 想用來推sl6si
或者有沒有ching用過其他膽前夾405,沒有低噪問題的
先謝過了! - #12 [shungyan], 16-09-22 00:55Sfl-1 推405-2 底噪大不大? 我現在有資格答啦! 唔大! 不過我部405轉咗1v input sensitivity!
- #13 [alphability], 16-09-22 06:16Sfl-1 推405-2 底噪大不大? 我現在有資格答啦! 唔大! 不過我部405轉咗1v input sensitivity! X2
當年改OPAMP 增益後(如下)，聲音變化不大
SFL-1 =＞ QUAD 405-2 =＞ LS3/5a (11ohm)
不過小心留意正相負相有否相反, 大聲時會更耐聽！
Note from BerndFritzLudwig
"To reduce gain of the input-stage...Local feedback: Close to the OpA there is one MKT-capacitor C4 =47nF connected
to R6=330k. Add [1] C4'=100nF (same type) across C4. Add [2] R6'=150k across
R6=330k.
Overall feedback: Two 22k-resistors are connected to pin 2 (inverting input of the OpA): R3 which leads to the input cap C1=0.68uF and R4=22k which leads to C2=100uF. Add [3] R4'=10k across R4=22k (not across R3!)..."
最後修改時間: 2016-09-22 06:20:24 - 返回 ...
Quad 405.2 Power Amp 加什麼膽前級好聲
樣子小巧更好
主要是推丹麥皇太子
多謝師兄指教