kijanki
Responses from kijanki
| Class D amps Nordick587 - it must've been long coma, since this partial list of companies making home Audio Class D was compiled in 2008:Acoustic Reality www.acoustic-realityeAR202, etc (ICEPower)Aivin www.aivinDT300 (www.aivin) (Tripath)Analog Research Techno... | |
| HDCD FLAC FOOBAR SPDIF Cary 303/200 HDCD Larry_s, AFAIK HDCD coding is a combination of peak extend (improved dynamics) and better filtering with interpolation. Redbook CD has limited dynamic range (otherwise everybody with a boombox or small system would complain about buzzing speakers ... | |
| HDCD FLAC FOOBAR SPDIF Cary 303/200 HDCD Without decoding dynamics might be lower and data will be only 15 bit since bit #16 is used to switch dynamic range. | |
| Speaker wire gauge You don't even have to calculate since area doubles every 3 steps. 4 wires = 4 x area = 6 steps. 24-6=18. | |
| Acoustic Zen Adagio Speakers? Mjmch2003, Yes speakers in Adagio have underhung motor that is responsible for both price (huge magnets) and some loss of dynamics. In exchange they produce much less distortion especially when displacements are large. Only few companies use under... | |
| Bandwidth question? Orpheus10, We're all talking harmonics here. I mentioned summing of harmonics twice while Al mentioned it also few times. Highest fundamental is around 8kHz (church organs) but most often it is only up to about 2kHz as it is shown in this interact... | |
| will different lengths affect sound I screw-up numbers in my last post - 54 deg should be 45 deg while phase difference between 10' and 20' cable comes to 12.5 degree (assuming resistive load of 4 ohms).arctan(2/4) - arctan(1/4) = 12.5deg | |
| Bandwidth question? Magfan, my class D Rowland 102 has 5Hz-65kHz -3dB bandwidth but I'm saving my Pesos for Rowland 625 with small possible temporary setbacks in the future like divorce, bankruptcy and foreclosure. | |
| will different lengths affect sound Much simpler explanation than transmission line analysis: Inductance of straight wire runs in order of 400nH/ft. Inductive reactance of 10' of speaker wire (20' counting both ways) at 20kHz is Xl=2*pi*20e3*20*400e-9=1ohm.Difference between 10' and... | |
| Bandwidth question? "Why 10 times the audbile bandwidth is neccessary" - Because of phase shift. Rule of thumb says that phase shift at 1/10 of -3dB cutoff frequency is about 5 deg and that might be significant for proper summing of harmonics. | |
| will different lengths affect sound If you believe that one speaker cable has different sound from another then this sonic signature will be proportional to the length of the cable. Sonic difference will be very small and you can probably convince yourself that there is or isn't any... | |
| It's all local now Rok2id - Yes, it was special. Young daughter of my friend said to me "you guys were lucky to live in times of all these great bands". | |
| Bandwidth question? Magfan,That's true, but sensitivity of the amp does not end at -3dB point. Also antenna reception still exists at 1/10 of the wavelength. If we take, in your example, level drop of 20dB/decade it will be only -43dB at 10x10x150kHz=15MHz. Your full... | |
| Bandwidth question? I agree that most of us can hear only up to perhaps 15kHz but higher system bandwidth guarantees low phase shift. For instance my Rowland 102 amp has -3dB bandwidth of 65kHz but at 15kHz has phase shift of about -20 degree. Even at 10kHz it is sti... | |
| It's all local now "You can't be in it because you really expect fame or fortune"With exceptions: Rolling Stones made $558 million between 2005 and 2007 on "Bigger Bang" tour. Previous "Forty Licks" tour brought them $200 million. They love to play, I'm sure, but $7... |