G****o 发帖数: 229 | 1 我在听,目前主要是讲如何推箱子
project是做 guitar amp 估计都是重点在做音箱吧
Week 1
Lesson 1: Introduction to wave propagation, simple oscillating systems,
sound pressure, sound waves, the speed of sound, wavelength, frequency and
wavenumber, sound pressure level, and auditory directional cues.
Lesson 2: Electronics fundamentals - charge, current, voltage, resistance,
Ohm’s law, DC circuits, finding currents and voltages in simple circuits
Week 2
Lesson 1: Reflection and absorption of sound, resonances in air columns,
res... 阅读全帖 |
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p********y 发帖数: 557 | 2 团购的DAC和MA能推好6 ohms 90db 的落地音箱吗? 1000刀内求推荐.谢谢! |
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g*******a 发帖数: 46 | 3 Onkyo TX-SR607 7.2-Channel A/V Surround Home Theater Receiver
90 Watts per Channel at 8 Ohms, 20 Hz–20 kHz, 0.08%,2 Channels Driven
HDMI™ Version 1.3a to Support Deep Color™, x.v.Color™,
LipSync
Audio and 1080p Video Processing via HDMI
Deinterlacer with Faroudja DCDi Edge™ (Directional Correlational
Deinterlacing) Technology
HDTV-Capable (720p/1080i) Component Video Switching (2 Inputs and 1
Output) |
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g*******a 发帖数: 46 | 4 这对音箱现在有特价,正在打算组建家庭K歌系统,音箱不在行,所以请教了。
http://www.frys.com/product/7580966
BUILT FROM: 2010
CROSSOVER FREQUENCY: 2250Hz
DEPTH: 8" (20.3cm)
ENCLOSURE TYPE: Bass-reflex via rear-firing port
FINISH: Black Ash vinyl
FREQUENCY RESPONSE: 62Hz-23KHz ± 3dB
HEIGHT: 12.5" (31.8cm)
HIGH FREQUENCY DRIVER: .75" (1.9cm) Aluminum diaphragm compression driver
mated to 90° x 60° square Tractrix® Horn
INPUTS: Single binding posts
LOW FREQUENCY DRIVER: 5.25" (13.3cm), magnetically shielded IMG woofer
NOMINAL IMP... 阅读全帖 |
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c****n 发帖数: 46 | 5 功放P2500s 250w x2 @ 8 ohm
Speaker 4-8ohm 150 w max
Mixer out 接 功放。
这样搭配可以吗? 多谢! |
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d****z 发帖数: 1232 | 7 就是说不可能所有音箱同时输出最大的功率,而且不是115w,要看8 ohms, 20 Hz-20
kHz, 0.09 % THD, 2 ch driven,所以是80W。不知道这个唱卡拉ok够不够? |
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d****z 发帖数: 1232 | 8 就是说不可能所有音箱同时输出最大的功率,而且不是115w,要看8 ohms, 20 Hz-20
kHz, 0.09 % THD, 2 ch driven,所以是80W。不知道这个唱卡拉ok够不够? |
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m*********r 发帖数: 720 | 9 全新,并不是太喜欢880的声音,可能是前端不行吧,感觉没有HD600对味。
有需要的同学PM或者email到:
m*************[email protected]
$295, my label |
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D**********s 发帖数: 3139 | 10 全新如果能退还是退了吧,昨天hd650才270,这个标230可能会有人问. |
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j*********r 发帖数: 24733 | 12 是啊,马宗上used-very good现在才200,上周我看到是$170. |
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j*********r 发帖数: 24733 | 13 130 W/Channel (6 ohms, 1 kHz, 1%, 1 ch driven)办不过也够用了. 另外音源的问题
最大. 换蓝光机放碟再试 |
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j*********r 发帖数: 24733 | 14 我LS不是回了么? 那只是在1 ch driven的情况下才能达到的功率. 接一个6欧的箱子
发信人: jerrycasper (Cat), 信区: HiFi
标 题: Re: 关于音响的几个问题
发信站: BBS 未名空间站 (Wed Jan 15 14:43:19 2014, 美东)
130 W/Channel (6 ohms, 1 kHz, 1%, 1 ch driven)办不过也够用了. 另外音源的问题
最大. 换蓝光机放碟再试 |
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r*****8 发帖数: 2697 | 16 我就不跳了, DT880估计不是我的菜. 现在有了DT990pro, 很对我的胃口了, 下次升级
应该是一年之后了, 呵呵 |
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j***k 发帖数: 2719 | 17 这个喇叭有两个单元,一个是高音的号角单元,还有一个是8寸的中底音。喇叭的构造
是类似PMC的TRANSMISSION LINE,喇叭下面有一个PORT。灵敏度很高,92DB,8OHM
。很适合我用的的小功率SET功放。用他听摇滚都非常给力。 |
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k******9 发帖数: 878 | 19 如果买BMB CSX-550 400W 8" 3-Way Speaker System ,这是它的参数:
Type: 3-Way, 3-Speaker Bass Reflex System
Speaker: One 8" Woofer each, Two 3" Tweeters each
Max Power: 400W
Sensitivity: 90dB/W/m
Impedance: 8 ohms
Dimensions: 18.27"(L) x 10.12"(W) x 10.55"(D)
Weight: 19.842 lbs each
那和Onkyo TX-NR626 receiver能搭配吗? |
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k******9 发帖数: 878 | 20 谢谢楼上2位,我现在用家里老的音响,实在效果太差了,雅马哈three way,
frequency range 100hz-40khz,impedance 6 ohms, nominal input 35w, maximum
input 120w, sensitivity 83dB,
你说的灵敏度是sensitivity? 那需要多少的数值?
我现在考虑的有JBL ES80,正好在打折,一对只有288
还有就是vocopro sv500 or sv600
再有就是日本的BMB CSX-550 |
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j*********r 发帖数: 24733 | 21 我有个TP22, 推BS41不是太好, 感觉比yamaha的后级差不少, 推我那对celestron封闭
箱倒还不错. 现在连在一个TV上推一对高敏的JBL. 我的TP22没耳机口, 不过这个价格
耳放的效果应该不会太好. 另外TA2050其实是30W, TA2022才是50W的(80W @ 4 Ohm per
channel), 这个好象是T-AMP里功率最大的一个了. |
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j**a 发帖数: 119 | 22 呵呵,一着急忘了贴音箱参数,
Pioneer fs51
Power Rating
130 W (Max.)
Frequency Response
45 Hz-20 kHz
Nominal Impedance
6 Ohms
Sensitivity
87 dB (2.83 V) |
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W********n 发帖数: 542 | 24 Tascam PA-R100 Network AV Surround Receiver $269 @ B& H Video
是Teac的牌子。
这个比 Onyko 525 好一点。
80 W per channel (8 ohms 20 Hz - 20 kHz, 0.08%, 2-channels driven, FTC)
5.2-Channel System with 80W per Channel
Built-in Wi-Fi & Ethernet Connectivity
Supports Cloud & Network Streaming
iPhone/iPod/iPad Connection via USB
Seven HDMI Inputs & One HDMI Output
HDMI Video Upscaling to 4K with Qdeo
Dolby TrueHD & DTS-HD Master Audio
Supports Zone 2 Playback in Another Room
Dual Optical & Dual Coaxial Audio Inpu... 阅读全帖 |
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n****1 发帖数: 2895 | 25 One day I picked up two free old speakers beside the street INFINITY Quantum
4
http://www.hifiengine.com/gallery/images/infinity-quantum-4-loudspeaker-system.shtml
They are in good shape but tweeters and mids are not working, I think that
is the reason the owner wants to trash them. I opened the box and found out
the
L-pads are broken, so I bypassed them with a 2 OHM resister, they all work
like new.
Great sound stage better than any <$500 new speakers from BB. |
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p********e 发帖数: 16048 | 27 价格:$1250+运费 估计$40/或者你的label
For sale is a pair of Sonus Faber Liuto Monitor Speakers in piano black
color.
They sound fantastic. You can come to audition them. They are in like-new
condition and 100% working, with original grills, package, and cloth covers.
Spec:
Sensitivity (db/w/m) 86
Dimensions (hwd, cm) 35x19x34
Impedance (ohms) 8
Max power handling (watts) 150 |
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x******r 发帖数: 538 | 30 老外的论坛,说其实没有耳放的年代很多人都是用耳机接在receiver上的,还说以前
tube时代,耳机设计的阻抗都比较高,现在耳机阻抗低下去了,所以可能有问题,有很
多人试过,用50 Ohm以上的效果就还算可以,具体是receiver本身的问题还是阻抗不匹
配,还是要等我亲自用高阻抗的耳机试一下,明天有结果了上来报道一下。简单的对技
术问题下结论离盲目花钱买设备就不远了。 |
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r*****8 发帖数: 2697 | 31 MBP的声卡相当不错了, E17和X3的音质比MBP稍有提高, 特别是对250 Ohm以上的耳机,
低阻耳机效果不明显 |
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r*****8 发帖数: 2697 | 32 MBP的声卡相当不错了, E17和X3的音质比MBP稍有提高, 特别是对250 Ohm以上的耳机,
低阻耳机效果不明显 |
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t*****e 发帖数: 2206 | 33 昨天Frys的经典deal:
Polk Audio RTi12,$299 each
http://www.frys.com/product/6895346
准备就此买receiver and/or amplifier.
由于RTi12的power是50-500W,研究了网上的各种评论得到结论:要发挥RTi12的best
performance,最好买receiver + external amplifier。一个推荐组合是:Onkyo TX-
NR828 + Emotiva XPA-3. 但,太豪华了不是?
能不能简单点买个Onkyo TX-NR727 at $449? (110W each channel at 8 Ohms) 普通大
小的房间也不会过分吵闹。其实Onkyo TX-NR626只要$269 at 95W each channel。
多谢! |
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t*******y 发帖数: 10477 | 34 这里也提到了你说的Hum:
Another downside I have with them is that they tend to be microphonic. I
find that if they are on for a while, they start to hum, and the humming
transmits through lower ohm headphones at high gain
http://www.head-fi.org/products/schiit-lyr-2 |
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n********n 发帖数: 529 | 36 旧的前几天就卖掉了,260卖的,还挺顺利。原来是RF7呀, 250W RMS / 1000W Peak,
那我建议上个 x2200w或者x3200w,这两个都带pre-out,剩下的钱买个 Emotiva xp-2
或者xp-5啥的。我上个月买了个XP-2,70lb,300 watts RMS per channel @ 8 ohm
(0.07% THD)。当然不差钱就直接上最好的receiver。:) |
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K*******n 发帖数: 607 | 37 原来你有后级,难怪听出不同。估计只上功放不上后级还是然并卵啊
2
ohm |
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H*****l 发帖数: 445 | 38 用笔记本播放音乐,输出到USB DAC,然后amp。耳机用的是DT770 Pro 250 Ohm.
播放软件和笔记本本身都可以调节音量,AMP也可以。 问题是在音量合适的情况下,如
何达到最好的音质? 我现在是把播放软件和笔记本都调到最大,调amp到最佳音量。这
样对不对? |
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a*****8 发帖数: 294 | 39 I think you should be satisfied with the speakers, esp. in Karaoke, as long
as you take some time to make the adjustment of settings. See:
Infinity Primus P363 Floorstanding Loudspeaker Review
http://www.audioholics.com/tower-speaker-reviews/primus-p363
Pros
•Impressive sound for such modest size and cost
•Ability to play loud without distress
•Very fluidic midrange performance
Cons
•4 ohm load may be challenging for modestly priced A/V receivers
•Treble a bit forwa... 阅读全帖 |
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a*****8 发帖数: 294 | 40 I think you should be satisfied with the speakers, esp. in Karaoke, as long
as you take some time to make the adjustment of settings. See:
Infinity Primus P363 Floorstanding Loudspeaker Review
http://www.audioholics.com/tower-speaker-reviews/primus-p363
Pros
•Impressive sound for such modest size and cost
•Ability to play loud without distress
•Very fluidic midrange performance
Cons
•4 ohm load may be challenging for modestly priced A/V receivers
•Treble a bit forwa... 阅读全帖 |
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b*******0 发帖数: 1695 | 41 budget $500, looking for a pair of 落地音箱, 8 ohm, 120-150W
谢谢 |
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w**********8 发帖数: 4112 | 42 Beyerdynamic DT 880 Premium 250 ohm + o2 odac
买了不到一个月,听了2次,木耳觉得浪费了,盒子配件什么都在,$400 total,
prefer湾区当面交易 |
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P*********y 发帖数: 310 | 43 不知道啊。你唱歌的时候是就用两个声道吗?你这个receiver功率”90 watts per
channel into 6 ohms (20-20,000 Hz) at 0.09% THD, with 2 channels driven”,
应该不至于过载保护吧。
: 谢谢,
: 还有一个问题,
: 我的Sony STR-DH740 7.2 Channel 4K AV Receiver,为啥连我的BOSE 唱歌用的
音箱当
: 声音调大就自动sutt off了,是不是功率不够啊?得另外买一个K歌用的功放吗?
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C*******d 发帖数: 15836 | 44 You are right. Below please find the procedure, and hopefully that can be
helpful.
A.O. Smith ProMax Water Heater Repair Procedure
1. Turn off water heater power (through breaker box)
2. Open upper and lower heater control panels
3. Disconnect wires at A, B, C, and D. Measure the resistance between A and
B, and C and D. The resistance should be around 10-20 Ohms. (When power is
on and wires are connected, the top two wires in the top panel should be 240
V, and the voltage between A and B, and C |
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t****t 发帖数: 610 | 45 空调压缩机无法运转。但是contactor没问题,因为压缩机风扇一直在低鸣,就是转不
起来。估计是电容坏了。打电话找人,报价$210, 150 labor + 60 parts.老婆死活不
同意 。结果买了个窗机顶了一天。第二天去grainger买了电容,结果俺们学校雇员还
有折扣 $17.5 ———》$12.5
五分钟换上,搞定。
注:操作前端开总闸。电容带电 (370v !!!),推荐用15k ohm, 2w 电阻放电,切勿触
摸或直接用螺丝刀放电!!!
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w***g 发帖数: 5958 | 47 【 以下文字转载自 Hardware 讨论区 】
发信人: wdong (cybra), 信区: Hardware
标 题: Re: 不需要cable,免费看电视 (转载)
发信站: BBS 未名空间站 (Sun Jan 1 22:21:17 2012, 美东)
验证完毕,可以work。我有一个75 ohm matching transformer,
(图http://www.summitsource.com/images/products/COTRAN.jpg)
一头连cable,另外一头挑一个拧到螺丝上,很方便。效果跟我自己做的鞋盒子天线差不
多,少收一个台,但是我主要看的那个台信号更好。 |
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F***Q 发帖数: 6599 | 48
是这样的。你可以用个multi-meter量一下音箱的电阻(ohm),选一个支持这个输出电阻
的receiver就可以了。 |
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P*******h 发帖数: 560 | 49 谢谢shjh1982和imore
SG379每找到,amazon和digikey上都没有,可能是停产了
俺就卖了个 1 OHM 30A 的 inrush current limiters,换上了,风扇开始转了,希
望没买错配件。 |
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s*****d 发帖数: 469 | 50 那您怎么不建议他先查查TERMINAL OHM/COMP AMP?直接就提接线盒? |
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