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w*******y
发帖数: 60932 | 2 Newegg has the Onkyo HT-RC360 receiver for $279 with promo code EMCJJKB83
Link:
http://www.newegg.com/Product/Product.aspx?Item=N82E16882120178
Processing
Power Output
Front L/R:
100 W + 100 W (8 ohms, 20 Hz-20 kHz, 0.08%, 2 channels driven, FTC)
125 W + 125 W (6 ohms, 1 kHz, 0.1%, 2 channels driven, FTC)
Center:
100 W (8 ohms, 20 Hz-20 kHz, 0.08%, 2 channels driven, FTC)
125 W (6 ohms, 1 kHz, 0.1%, 2 channels driven, FTC)
Surround L/R:
100 W + 100 W (8 ohms, 20 Hz-20 kHz, 0.08%, 2 channels driv... 阅读全帖 |
|
A*******g
发帖数: 607 | 3 PWM 1khz 只是专利的第一项：
http://www.freepatentsonline.com/y2011/0164069.html
What is claimed is:
1. An electronic device, comprising: a display panel comprising a plurality
of pixels; a light source comprising a plurality of light emitting diode (
LED) strings adapted to generate light to illuminate the plurality of pixels
; and display control logic adapted to sequentially activate and deactivate
each LED string of the plurality of LED strings at a frequency of
approximately at least 1 kHz.
2. The el... 阅读全帖 |
|
A*******g
发帖数: 607 | 4 PWM 1khz 只是专利的第一项：
http://www.freepatentsonline.com/y2011/0164069.html
What is claimed is:
1. An electronic device, comprising: a display panel comprising a plurality
of pixels; a light source comprising a plurality of light emitting diode (
LED) strings adapted to generate light to illuminate the plurality of pixels
; and display control logic adapted to sequentially activate and deactivate
each LED string of the plurality of LED strings at a frequency of
approximately at least 1 kHz.
2. The el... 阅读全帖 |
|
i*d
发帖数: 2640 | 5 673比573功率大些，网站标了好几个数字，容易把人弄晕。673和717比，仔细看数据，
功率差的并不太多。
Rated Output Power (1kHz, 2ch driven) 105W (8ohms, 0.9% THD)
Rated Output Power (20Hz-20kHz, 2ch driven) 90W (8ohms, 0.09% THD)
Dynamic Power per Channel (8/6/4/2 ohms) 130/170/200/240W
All Channels 125 W (6 ohms, 1 kHz, 0.7%, 2 channels driven)
Front L/R 110 W (8 ohms, 20 Hz-20 kHz, 0.08%, 2 channels driven, FTC)
125 W + 125 W (6 ohms, 1 kHz, 0.7%, 2 channels driven, FTC)
Center 110 W (8 ohms, 20 Hz-20 kHz, 0.08%, 2 channels driven, FTC)
12... 阅读全帖 |
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w*******y
发帖数: 60932 | 6 This was front page a week or so ago at $424 and a lot of people wanted $400
. Here you go. Great network receiver at the $400 range. This plays
internet music directly from the receiver once you plug in internet access.
No computer needed. Two independent zones make another great option. Plus
there are 6 HDMI inputs which is well more than most can use.
Link:
General
Brand
ONKYO
Type
Receiver
Model
HT-RC270
Channels
7.2-Channel
Processing
Power Output
Front L/R
- 10... 阅读全帖 |
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s**a
发帖数: 1995 | 7 本版大拿，不少小白，像我一样入手了这对音箱，但对给这对音箱匹配一个合适的功放
是给个难题。我看了看手头的资料，还是不太明白，哪位能以这对音箱为例讲解一下匹
配音箱和功放的原则，比如，六欧姆不是典型的阻抗值，怎么计算合适的功率，除了功
率以外还有什么指标要匹配如何匹配等等，实在是功德无量的好事。本人愿意全部包子
赠送。
先锋BS-41指标如下
Enclosure ... Bass-reflex Bookshelf Type
Configuration ... 2-way
Frequency Range ... 55 Hz-20 kHz
Nominal Impedance ... 6 Ohms
Sensitivity (2.83 V) ... 85 dB
Maximum Input Power ... 130 W
Crossover Frequency ... 2.5 kHz
amazon有个ONKYO TX-8050 2.0的receiver，我比较喜欢它的数字输入比较多，光纤/
usb/coax都有，而且列出来的6 Ω loads 100W 功率貌似也够了。他的电气指标如下。
哪位如... 阅读全帖 |
|
c*******n
发帖数: 671 | 8 谢谢，以下是我的X11/xorg.0.log, 我看不出来什么问题？是的我不应该删lightdm，
不是那个的问题。startx会出现我上面帖子写的Loading extension GLX, fatal
server error: no screen found. 请问我该怎么修复xwindow? 谢谢！
[ 4.113]
X.Org X Server 1.13.0
Release Date: 2012-09-05
[ 4.113] X Protocol Version 11, Revision 0
[ 4.113] Build Operating System: Linux 3.2.0-37-generic x86_64 Ubuntu
[ 4.113] Current Operating System: Linux x-ThinkPad-X201 3.5.0-49-generic
#74-Ubuntu SMP Fri May 2 23:28:58 UTC 2014 x86_64
[ 4.113] Kernel command line: BOOT_IM... 阅读全帖 |
|
w*******y
发帖数: 60932 | 9 Link:
https://www.shoponkyo.com/detail.cfm?productid=HT-RC230&modelid=24&group_id=
1&detail=1
for new members join club Onkyo $100 otherwise $110
includes 15% disc for today only
I live in FL shipped $106.63 ($6.98 tax)
this has been posted before but not w/ 15% discount
Amplifier Section
Power Output* (8 ohm, 20 Hz-20 kHz, FTC)
Front L/R 60 W/Ch
Center 60 W
Surround L/R 60 W/Ch
Surround Back
Power Output* (6 ohm, 1 kHz, FTC)
Front L/R -
Center -
Surround L/R -
Surround ... 阅读全帖 |
|
w*******y
发帖数: 60932 | 10 Link:
https://www.shoponkyo.com/detail.cfm?productid=HT-RC230&modelid=24&group_id=
1&detail=1
for new members join club Onkyo $102 otherwise $112
Amplifier Section
Power Output* (8 ohm, 20 Hz-20 kHz, FTC)
Front L/R 60 W/Ch
Center 60 W
Surround L/R 60 W/Ch
Surround Back
Power Output* (6 ohm, 1 kHz, FTC)
Front L/R -
Center -
Surround L/R -
Surround Back
Dynamic Power** (front)
3 ohm 160
4 ohm 125
8 ohm 85
THD (Rated Power) 0.7 % (2 channels driven)
Damping Factor (1 kHz, 8 ohm) 60
Input Sensitivit... 阅读全帖 |
|
K**********n
发帖数: 1197 | 11 增加电感系数吧，这是低频波段了。AM最低的频率也是200kHZ了吧？
三个波段，
Long wave is 153–279 kHz, with 9 kHz channel spacing generally used. Long
wave is only used for radio broadcasting in ITU region 1 (Europe, Africa,
and parts of Asia), and is not allocated elsewhere. In the United States,
Canada, Bermuda, and U.S. territories, this band is mainly reserved for
aeronautics navigational aids, though a small section of the band could
theoretically be used for microbroadcasting under the United States Part 15
rules. Due to th... 阅读全帖 |
|
w*******y
发帖数: 60932 | 12 Crown XL 5000 rackmount stereo amplifier for $534 shipped!
This is a barn burner price. I see this amp most places for $1k. Crown is
a well recognized and high quality manufactorer. 3 year full warranty.
This amp actually sells on ebay used for more than this new price in in all
of the most recent sales. I don't know that's it's worth flipping because
it weighs 73 pounds and by the time you pay shipping and fees you wouldn't
turn a profit - but it's nice to know you can buy something new for... 阅读全帖 |
|
B******1
发帖数: 9094 | 13 Good call. I found another post below:
Following the directions on each package, the team mounted the devices onto
a car's front bumper. Using a road closed to the public, they drove the car
at speeds ranging from 30 to 45 miles per hour while recording sound and
data.
"We tested them strictly from an acoustical point of view," explains
Scheifele. He found that the whistles typically produce a signal either at a
frequency of 3 kilohertz (kHz) or 12 kHz. Both, as it turns out, are
problematic.
Th... 阅读全帖 |
|
j*********r
发帖数: 24733 | 14 dota解释的很清楚了, 另外这只公房的说明书上其实说的很清楚了:
• Rated Output Power (2-channel driven)
[U.S.A. and Canada models] (20 Hz to 20 kHz, 0.09% THD, 8Ω)
[Other models] (20 Hz to 20 kHz, 0.09% THD, 6Ω)
Front L/R .....................................................80 W+80 W
[U.S.A. and Canada models] (1 kHz, 0.9% THD, 8Ω)
Front L/R .....................................................95 W+95 W
Center ............................................................ 95 W
Surround L/R................................... 阅读全帖 |
|
d******0
发帖数: 22800 | 15 ☆─────────────────────────────────────☆
story9988 (小小故事人) 于 (Mon Jan 3 09:24:25 2011, 美东) 提到:
最近经常用到，随便讲一下。
jitter本身就是一个专业术语，可惜，90%的中文书里面看不到正确的解释，10%的英文
专业书，也会有错误的解释。
jitter是 variety of delay。很清楚，很明白，比方说delay一直是10ms，那么就是
constant了，也就是jitter=0.但是，可能么？
这里就解释了为什么有些人提出cd player加个RAM就可以解决的问题，可以么？
不可以！
这也就是为什么jitter消除不了的原因。
再说一下震动，音响器材里面最怕的就是震动，因为器械一震，会影响很多问题，这也
就是脚钉这样一个神奇之物的主要功效。
但是，震动就一定是不好的么？很多时候歪打正着，很可能就是抵消了有害波，这个时
候，就有意思的。
所以了，HIFI为啥这么多年来一直这么有魅力，一句话：不统一的和谐型。
这也是我老见过最有趣的一个东西，一个早就拥有了一个宗旨：高度还原... 阅读全帖 |
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k******9
发帖数: 878 | 16 如果准备买JBL ES80，那Onkyo TX-NR626可以搭配吗，我把参数都列在下面，麻烦高手
看看，谢谢了
JBL ES80. Specifications General Specifications Finish Black Series ES Wall-
Mount Capable No Type Floorstanding Audio Specifications Crossover
Frequencies 700Hz, 3.6kHz a?" 24dB/octave; 12kHz a?" 18dB/octave Maximum
Recommended Amplifier Power 200W Power Handling (Recommended) 100W
Sensitivity (2.83V@1m) 91dB Power Handling (Peak) 400W Nominal Impedance 8
ohms Frequency Response 45Hz a?" 40kHz Speaker Specifications High-Frequncy
Transduc... 阅读全帖 |
|
k******9
发帖数: 878 | 17 这种卡拉OK要求的音响，有什么参数要求，这方面一窍不通，听大家说音响容易烧坏，
那是要哪个参数高或者低？有具体的选购参数标准吗？
我在版上翻了翻，有推荐JBL ES80的，还有BOSE301的，前几天看到NEWEGG上有POLK打
折的，等等等，大家可以给个建议吗？
另外如果选好了音响，如何看功放的参数和音响是否匹配，不会烧坏也不会推不上去，
那要看哪几个项目的数值，实在是什么都不懂，望高手帮忙！感激不尽
如果准备买JBL ES80，那Onkyo TX-NR626可以搭配吗，我把参数都列在下面，麻烦高手
看看，谢谢了
JBL ES80. Specifications General Specifications Finish Black Series ES Wall-
Mount Capable No Type Floorstanding Audio Specifications Crossover
Frequencies 700Hz, 3.6kHz a?" 24dB/octave; 12kHz a?" 18dB/octave Maximum
Recommended Amplifier... 阅读全帖 |
|
f****i
发帖数: 20252 | 18 光纤不是一面镜子，是用两种不同折射率的玻璃实现全反射，其实就是折射，＂电磁波
拐弯＂．你到底学过电磁场和光通讯没？
中波传播距离能比１００MHz的调频广播距离还短？
中波传播方式你自己看Wiki：
http://en.wikipedia.org/wiki/Surface_wave
Radio propagation[edit]
Most long-distance LF "longwave" radio communication (between 30 kHz and 300
kHz) is a result of groundwave propagation. Mediumwave radio transmissions
(frequencies between 300 kHz and 3000 kHz), including AM broadcast band,
travel both as groundwaves and, for longer distances, as skywaves. Ground
losses become lower at lower frequen... 阅读全帖 |
|
a******e
发帖数: 80 | 19 这个问题可能很简单，但我一时想不明白，哪位大虾指点一下
我现在有一个spectrum analyzer可以显示0(不是0，接近0)到100kHz范围内的噪声，
analyer提供两种显示，一种是V/sqrt Hz为单位，另一种是V rms/sqrt Hz。（sqrt的
意思是square root）
问题1： 如果我要求100 Hz到10 KHz的RMS noise voltage, 我应该把以V/sqrt Hz为单
位的读数，先平方，然后做从100 Hz到10 KHz的积分，接着再把结果开方，最后得到的
就是100 Hz到10 KHz的RMS noise voltage,这个理解没错吧？
问题2： 那如果拿到的是V rms/ sqrt Hz的数据，然后还是要求100 Hz到10 KHz的RMS
noise voltage，这个我就是不明白了。从数据单位可以看出，它已经是rms的了，但不
知道这个rms是基于那个频率范围算出来的均值？是不是在每一个具体采样点附近的一
个狭小频宽内？
谢谢 |
|
w*******y
发帖数: 60932 | 20 Onkyo HT-RC360 7.2-Channel Network Audio/Video Receiver (Black)
Amazon link:
http://www.amazon.com/Onkyo-HT-RC360-7-2-Channel-Network-Receiv
Typically around $400, so seems like a good deal.
Details
Technical Details
100 Watts per Channel at 8 Ohms, 20 Hz-20 kHz, 0.08%, 2 Channels Driven,
FTC; 125 Watts per Channel at 6 Ohms, 1 kHz, 0.1%, 2 Channels Driven, FTC
6 HDMI Inputs and 1 Output, HDMI Support for 3D, Audio Return Channel,
Deep Color , x.v.Color , Lip-sync, Dolby TrueHD
DTS-H... 阅读全帖 |
|
w*******y
发帖数: 60932 | 21 Amazon just reduced the price on Onkyo HT-RC360 7.2-Channel Network Audio/
Video Receiver (Black).
$321.44
Link:
http://www.amazon.com/Onkyo-HT-RC360-7-2-Channel-Network-Receiv
This is am awesome Receiver for the price and compares head on to:
Denon AVR-1912
Yamaha RX-V671
Pioneer VSX-1021-K
Technical Details
100 Watts per Channel at 8 Ohms, 20 Hz-20 kHz, 0.08%, 2 Channels Driven,
FTC; 125 Watts per Channel at 6 Ohms, 1 kHz, 0.1%, 2 Channels Driven, FTC
6 HDMI Inputs and 1 Output, HDMI S... 阅读全帖 |
|
w*******y
发帖数: 60932 | 22 Onkyo HT-RC360 7.2-Channel Network A/V Receiver $299.99 Shipped Amazon
Amazon just reduced the price on Onkyo HT-RC360 7.2-Channel Network Audio/
Video Receiver again(Black). Was lowered again from $320 or so a few days
ago and now matches what Fry's has been listing it on-sale for, minus the
tax.
$299.99
Not a bad deal and compares with the following but lacks airplay.
Denon AVR-1912
Pioneer VSX-1021-K
Yamaha RX-V671
More Details:
100 Watts per Channel at 8 Ohms, 20 Hz-20 kHz, 0.08%, 2 Channels... 阅读全帖 |
|
|
G**L
发帖数: 22804 | 24 你们搞物理的博士给讲讲大傻能传300公里的结论是肿么来的
http://en.wikipedia.org/wiki/Underwater_locator_beacon
A 37.5 kHz (160.5 dB re 1 μPa) pinger can be detectable 1–2 kilometres (0.
62–1.24 mi) from the surface in normal conditions and 4–5 kilometres (2.5
–3.1 mi) in good conditions. A 37.5 kHz (180 dB re 1 μPa) transponder
pinger can be detected 4–5 kilometres (2.5–3.1 mi) in normal conditions
and 6–7 kilometres (3.7–4.3 mi) in good conditions. Transponder 10 kHz (
180 dB re 1 μPa) range is 7–9 kilometres (4.3–5.6 mi... 阅读全帖 |
|
i**i
发帖数: 2042 | 25 人类： 20 Hz to 20 kHz
狗： 40 Hz to 60 kHz
猫： 55 Hz up to 79 kHz
海豚： 75 Hz to 150k Hz |
|
|
a******s
发帖数: 4052 | 27 http://web.archive.org/web/20010117182700/http://www.celestion.
CELESTION 1
The new Celestion 1 is a masterpiece of loudspeaker engineering designed
to enhance any of today's music systems, whether as an upgrade to a Midi
system, or for use in a more audiophile set-up. This high quality speaker
utilises Celestion's renowned 1" (25mm) titanium dome tweeter along with a
special new 4" (105mm) felted fibre cone mid/bass unit to provide superb
sound reproduction. Coupled with the compact slee... 阅读全帖 |
|
L**Q
发帖数: 4 | 28 想配套卡拉ok. 最好能以后能兼顾家庭影院
这几天在版上收益非浅
so far 配置如下：
1. mic 就用大家推荐的 Shure 58S. musician's friend 现在有rebate， $104 x 2-
26
http://www.musiciansfriend.com/pro-audio/shure-sm58s-mic-with-switch
2. 音箱就用 Bose 310, 到处都一个价330. 在crutchfield.com买的，没有税。
3. mixer 和 receiver 就有点犹豫
option a: 就是用 BMB DAS-150 (SE) 300W 2-Channel Karaoke Mixing Amplifier
. 一个box就行了，可放在一起是不是不太好，而且以后不能兼顾家庭影院。 $819 也
不便宜。
option b: mixer 用 BMB 3000 g2, 可除了ebay没见哪儿有卖的. Receiver 没有选
到特别合适的。 想有足够大的 power 推Bose 310，声音好，有wifi,blue... 阅读全帖 |
|
l******g
发帖数: 6771 | 29 新手，最近看看音响,看看电影，唱唱卡拉OK，人笨不太会考古搜精华，所以就放狗搜
，看到这个深入浅出，转到版上分享一下，抛砖引玉。。。
http://thecreativealternative.com/best-home-theater-receiver-gu
#####################################################################
AV Receiver Guide – Home Theater
Posted on April 14, 2013 by mychaelp
Check out some of the latest models with 4K Ultra HD compatibility now
included in this AV Receiver Guide for Home Theater
The A/V Receiver… Some have referred to this device as “The “Heart of the
Home Theater”. And for good reas... 阅读全帖 |
|
n*****g
发帖数: 178 | 30 我想弄个卡拉OK，兼家庭影院效果。不知道雅马哈HTR-3066 能否带得起五个bose 301+
subwoofer？
雅马哈参数如下，我看不懂为何有两个不同的瓦数per channel？？
5-channel powerful surround sound
100 W per channel (8 ohms, 1 kHz, 0.9% THD, 1-ch driven)
70 W per channel (8 ohms, 20 Hz-20 kHz, 0.09% THD, 2-ch driven)
Discrete amp configuration
HD Audio format decoding: Dolby® TrueHD and DTS-HD Master Audio™
Dolby® Digital Plus and DTS-HD High Resolution Audio™
192 kHz/24-bit Burr-Brown DACs for all channels
High dynamic power, low-impedance... 阅读全帖 |
|
r*********2
发帖数: 108 | 31 感谢您的回复！
看了你的回复现在纠结于两个型号不知道选择哪个好，我感觉区别就是Eizo是LED
backlight, 而NEC 是CCFL Backlight。 价格NEC比EIZO贵47刀。下面列出参数，
请你在给些建议，十分感谢！。
Eizo - FlexScan 24" LCD Monitor $477.49
Model: EV2436W
Panel
Type IPS
Backlight LED
Size 24.1" / 61 cm (611 mm diagonal)
Native Resolution 1920 x 1200 (16:10 aspect ratio)
Viewable Image Size (H x V) 518.4 x 324.0 mm
Pixel Pitch 0.270 x 0.270 mm
Display Colors 16.77 million
Viewing Angles (H / V, typical) 178°, 178°
Brightness (typical) ... 阅读全帖 |
|
w****j
发帖数: 237 | 32 不好意思，原文有错误，应该是：
频谱分析仪span 1MHz, 100 kHz/division 横轴，10 dB/division 纵轴。RBW 10 KHz,
VBW 100 KHz.
用的是E4440测得，绿线是MAX hold.应该不是RBW或者VBW的问题，因为不同的设置都用
过了，spur还在。
也是怀疑不稳定引起的，用的是op-amp的active bias,增加其中电路gate偏置的LPF的
电容不知道会不会降低spur。
另外，放大器的spur对系统的影响应该怎么确定了?降低信噪比？降低BER? |
|
w*******y
发帖数: 60932 | 33 I normally don't pre-post, but this receiver is already priced below other
sellers. At 6:20 PM EST (3:20 Pacific), Amazon will be offering an
additional discount. Most likely it will be around 50% off ($425), but could
be even lower.
Gold box link
product link
Link:
http://www.amazon.com/gp/product/B003K51IPI
Description
Onkyo HT-RC270 7.2-Channel Network A/V Receiver (Black)
by Onkyo
List Price: $849.00
Price: $499.99 & eligible for free shipping with Amazon Prime
You Save: $349.01 ... 阅读全帖 |
|
w*******y
发帖数: 60932 | 34 Logitech Ultimate Ears SuperFi 4 Noise Isolating Earphones -$29.99 after
Code Applied, with free shipping at logitech.com
Code to apply at checkout: superfi4_311 (exp. 3/17)
Deal LINKY:
http://www.logitech.com/en-us/speakers-audio/earphones/devices/
Tuned in - Youll get lost in your music with silicone ear-cushions that
block outside noises like the chatty guy behind you.
The real thing - Your music will sound the way it was meant tocrisp and
clean mid and high tones with detailed bass.
Not-hea... 阅读全帖 |
|
f****r
发帖数: 5118 | 35 懂信号处理的帮忙分析一下 Wow Signal，俺以前懂，现在虾米了
这个东西说不定正往地球飞过来呢
http://en.wikipedia.org/wiki/Wow!_signal
The Wow! signal was a strong narrowband radio signal detected by Dr. Jerry R
. Ehman on August 15, 1977, while working on a SETI project at The Big Ear
radio telescope of The Ohio State University.[1] The signal bore expected
hallmarks of potential non-terrestrial and non-solar system origin. It
lasted for the full 72 second duration that Big Ear observed it, but has
not been detected again. Much attenti... 阅读全帖 |
|
f*********d
发帖数: 3358 | 36 http://news.cnet.com/8301-13645_3-10466722-47.html
Hifiman HM-801 vs. iPod, Zune: A sound winner?
Sure, iPods and Zunes can sound perfectly fine, but no one ever claimed they
were bona fide portable high-end audio devices. Their "good enough" sound
isn't entirely their fault: they're too small to house a battery potent
enough to power a high-quality headphone amplifier and a high-resolution 24-
bit/96kHz digital-to-analog converter.
The Hifiman High Fidelity Music Player HM-801 is the Hummer of ... 阅读全帖 |
|
G*******r
发帖数: 657 | 37 http://www.etsist.upm.es/estaticos/catedra-coitt/web_salud_medi
加拿大卫生部这篇文章的第63页有这么一句话，说低于70-100kHz会有刺痛感，但是高
于这个频率人会感到热，了解无线电的朋友们来说说这会是什么设备。
The perception of currents at frequencies lower than 70-100 kHz
is quite different than that from currents at higher frequencies. While
the perception is one of tingling or pricking sensation at frequencies
lower than about 100 kHz, the sensory perception is that of warmth
at the higher frequencies
8E%
E7.
57] |
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m****r
发帖数: 283 | 38 Denon AVR-684 AV Surround Receiver. All the usual bells and whistles. 75
Watt. Six Channels.
Velodyne CHT-8 Subwoofer. Frequency response: 35-149 Hz. A versatile 8"
sub, with a clear, deep sound.
Two B & W(Bowers & Wilkins) DM600 S3 bookshelf loudspeakers. Bandwidth 75
Hz - 22 kHz. 120 Watts at 8 Ohms.
Tweeter: 25 mm. Boomer: 180 mm.
Two B & W DM602 S3 bookshelf loudspeakers. Bandwidth 49 Hz - 22 kHz. 100
Watts at 8 Ohms. Tweeter: 25 mm.
Boomer: 135 mm. All the speakers have a clean sound with g |
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C********n
发帖数: 6682 | 39 你去好好看看那所谓的jitter management都是对应什么应用的
20-20000 hz的音频，撑死了也就是192 khz的数字信号，192 khz的 D/A，时钟都做不
好，那些人完全可以去跳楼了
jitter在音响里就是个笑话
而且按照你的理论，那么无论你后期的clock做的多好，只要前期你AD的clock不达标，
一样没戏
音响界经常有人吹牛他D/A jitter能做到5ps,你去问问他他音源A/D的jitter是多少 |
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G********d
发帖数: 10250 | 41 dyna focus 110
45 Hz5 kHz (3 dB)
dyna focus 140
41 Hz5 kHz (3 dB)
va haydn grand
42-20000 Hz 5” Bass/Midrange Driver
sf domus concertino
找到了
50 Hz - 20.000 Hz
sf toy
60 Hz – 25.000
sf 老concertino
Frequency response: 55-20,000 Hz, + 3 dB
linn katan
75Hz to 20kHz (+/-3dB)
silverline minuet
60 - 28,000 Hz |
|
l****e
发帖数: 476 | 42 http://www.musiciansfriend.com/stupid/?icid=200510&CJAID=103812
查了下spec,
Recording and playback formats
WAV: 44.1/48/96 kHz, 16/24-bit (stereo or monaural)
MP3: 44.1 kHz, 32/64/96/160 kbps (monaural), 64/128/192/320 kbps (stereo)
/LINE OUT jack
Connector: 1/8” (3.5-mm) stereo mini-jack Output impedance: 200Ω
Nominal output level: –18 dBV
Maximum output level: –2 dBV
106TASCAM DR-08
11 – Specifications
Maximum output: 5 mW + 5 mW (into 16Ω) |
|
D**********s
发帖数: 3139 | 43 音量控制对音质的影响，以前有一篇note写得不错，我找了半天才找到，其实还有用变
压器的方法，不过dac这块最保真的方法就是保持位深和标准输出电平，音量控制交给
前级和功放去管就好了，终究绕不过模拟放大这一关的。
Volume Control Technologies
Newsletter Edition:
July 2009 Issue
With the introduction of Benchmark’s HDR-VC™ (High Dynamic Range
Volume Control), many audio enthusiasts are taking another look at volume
control methods. What are the differences between the different volume
control topologies? Is one sonically superior, and why?
The important qualities to consider with respect to volum... 阅读全帖 |
|
b**w
发帖数: 283 | 44 是 Control4 的multiple channel amplifier,上一个房东留下的：
Model Number C4-16AMP3-B
Analog Input Sources 16
Digital Input Sources 0
Speaker Output Zones 8
Line Level Output Zones 0
Rated Wattage
per Channel 120 @ 8 ohms
220 @ 4 ohms
Frequency Response 19 Hz – 20 kHz
+/-.5dB @ 8 ohms
+/- .2dB @ 4ohms
Signal-to-Noise Ratio >95 dB
THD <0.05% –... 阅读全帖 |
|
s******d
发帖数: 2568 | 45 Class D的放大器确实是先进入中高端的HT receiver的。 以前Class D的放大器的BOM
成本比A/B高。 但现在已经用在有些中低端的HT Receiver了。
曾经测过几台早期先锋Elite 和Sony ES的Class D HT receivers。 虽然输出端已有LC
滤波， 但音频上仍叠加有不小的几百KHz锯齿波。 理论上讲喇叭线圈也是滤波器的一
部分， 而且人耳听不到几百KHz信号。 但音质确实不太好。 在参数指标上， Class D
的失真一般比A/B要高。 |
|
s******d
发帖数: 2568 | 46 Class D的放大器确实是先进入中高端的HT receiver的。 以前Class D的放大器的BOM
成本比A/B高。 但现在已经用在有些中低端的HT Receiver了。
曾经测过几台早期先锋Elite 和Sony ES的Class D HT receivers。 虽然输出端已有LC
滤波， 但音频上仍叠加有不小的几百KHz锯齿波。 理论上讲喇叭线圈也是滤波器的一
部分， 而且人耳听不到几百KHz信号。 但音质确实不太好。 在参数指标上， Class D
的失真一般比A/B要高。 |
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Y**i
发帖数: 3016 | 47 26 inch Soyo LCD monitor 1920 x 1200 excellent condition
in excellent condition in all aspects
never ever had any problem, very reliable sharp and bright monitor
$190 obo
please see a detailed review of the monitor here:
http://benchmarkreviews.com/index.php?
option=com_content&task=view&id=191&Itemid=1
please email me at PurdueUSA .at. gmail.com or call me at 765-409-8119
if interested.
SOYO Pearl Series Features
SOYO Pearl series LCD monitors incorporate superior TFT (Thin Film
Transistor) dis... 阅读全帖 |
|
Y**i
发帖数: 3016 | 48 26 inch Soyo LCD monitor 1920 x 1200 excellent condition
in excellent condition in all aspects
never ever had any problem, very reliable sharp and bright monitor
$140 obo
please see a detailed review of the monitor here:
http://benchmarkreviews.com/index.php?
option=com_content&task=view&id=191&Itemid=1
please email me at PurdueUSA .at. gmail.com or call me at 765-409-8119
if interested.
SOYO Pearl Series Features
SOYO Pearl series LCD monitors incorporate superior TFT (Thin Film
Transistor) dis... 阅读全帖 |
|
c***n
发帖数: 1511 | 49 好听。
关于S音，我听说是可以用EQUALIZER，在某个特定的高频上“削”一下。但是没试过，
可能可以google出来：
http://www.audio-production-tips.com/vocal-eq.html
"Sibilance around the 7 Khz.
Some people have more sibilance than others. The s' sounds have much more
energy than other consonants. If your singer has an excess of s's you can
try cutting around 7 Khz. It will make the s's less pronounced and won't
make them jump out too much. Better yet, inserting a de-esser or a
compressor that only compresses the s area can work even better." |
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