AccessMyLibrary provides FREE access to over 30 million articles from top publications available through your library.
Create a link to this page
Copy and paste this link tag into your Web page or blog:
Addendum: Velodyne Deco Series Speaker Package.
Manufacturer: Velodyne Acoustics, 345 Digital Drive, Morgan Hill,CA 95037; 408/465-2800; techhelp@velodyne.com (Please note this is the correct address; an old one was printed erroneously in Issue 96's review). Price: $1,499 (Satellite list price: $149) Source: Reviewer Loan
[Editor's Note: In Issue 96, Howard Ferstler praised the performance of the Velodyne Deco Series loudspeaker package. Unfortunately, the graph that Howard had produced to show the performance of the system got hung up somewhere between Ostrander and Snyder; however, we are reprinting it here, along with some explanatory excerpts from Howard's full review. Those who would like to learn more about these speakers should refer back to the full review in our previous issue.--KWN]
I started off by doing some RTA measurements with just one pair of satellites in combination with the subwoofer. I used my vintage Carver C-1 preamp, in combination with an 80-wpc AudioSource Amp-One power amp for these initial measurements, and also for my initial listening impressions. For this phase of the analysis, I used the Velodyne's on-board crossover and set the low pass to the recommended 100-Hz mark. The satellites were on 28-inch stands.
After fooling around with satellite and subwoofer placement for a while, I managed to get a very workable response curve. "Fooling around" in this case involved making sure that the distance from the center of the 4-inch midrange drivers to the front and side walls were reasonably different from each other and also from the distance to the floor. It also involved toeing the satellites inward toward the center of the listening couch. As you can see from the curve, we still have a bit of a boundary-related dip at 160 Hz, but with some other smallish sub-sat systems I have reviewed the dip has been considerably more emphatic.
Note the midrange smoothness between 200 Hz and 2 kHz. This is as good as I have gotten with some very expensive ...
- Velodyne Deco series speaker package. (Components).
- Magazine article from: Sensible Sound Ferstler, Howard June 1, 2003 700+ words
...wars to 110 watts, and the rated response is from 110 Hz on out to 20 kHz, +/- 3 dB. The speaker is warranted...surround-sound receiver. The sub is rated to cover 28 Hz to 120 Hz, +/-3 dB. The on-board crossover is typically Velodyne...
- Design decision: 60 Hz or 50 Hz? Global marketing demands challenge machine...
- Magazine article from: Design News November 21, 2005 700+ words
...as well as the domestic market. That means a 60 Hz motor for North America and a 50 Hz power supply every-where else. Does the OEM build...requirements for North America, i.e. 460V, 60 Hz. Another line, based on a 400V, 50 Hz power supply...
- 80 Hz data acquisition for Ultra-fast LC.(Application in...
- Magazine article from: Laboratory Equipment Gratzfeld-Huesgen, Angelika Frank, Michael Schuette, Stefan July 1, 2005 700+ words
...However, current diode-array UV detectors with 20 Hz signal sampling rate and 10 Hz spectral rate are simply not fast enough to accurately...Agilent has introduced the 1100 Series DAD SL with 80 Hz multi-signal and full spectral sampling rate for...
- 1-Hz to 100-MHz VFC features 160-dB dynamic range.(design ideas)
- Magazine article from: EDN Williams, Jim September 1, 2005 700+ words
...and allows continuous operation down to 1 Hz. Additional specifications include 0...drift ensures the circuit's 50-nV/Hz gain-versus-frequency characteristic slope and permits operation as low as 1 Hz at 25[degrees]C. Applying a positive...
- Lymphoma risk does not rise with chronic exposure to 50 Hz magnetic fields.
- Newspaper article from: Life Science Weekly October 26, 2004 700+ words
...does not rise with chronic exposure to 50 Hz magnetic fields. "Some epidemiological studies suggest that exposure to 50 or 60 Hz magnetic fields might increase the risk...possibility experimentally, the influence of 50 Hz magnetic-field exposure on lymphoma induction...
- Spectrum Analyzers span 3 Hz to 26.5 GHz.(Product Briefing)
- Magazine article from: EE-Evaluation Engineering August 1, 2006 700+ words
...local oscillator phase noise <-115 dBm/Hz at 10 kHz offset from 1 GHz and +18 dBm third...IF offers resolution bandwidths from 5 MHz to 1 Hz. The 3281 has a frequency range from 3 Hz to 3 GHz, the 3282 from 3 Hz to 13.2 GHz, and...
- Schirn Kunsthalle. (Reviews).(Frequencies [Hz])
- Magazine article from: Artforum International Fricke, Harald October 1, 2002 700+ words
"FREQUENZEN [HZ]" Many have observed a change in the Schira...concern. Running parallel to "Frequenzen [Hz]" (Frequencies), an exhibition on the...a significant portion of "Frequencies [Hz]" seemed of more scientific than artistic...
- Low noise, 1.9nV/[square root of Hz], 100MHz op amps require just 3mA max...
- Magazine article from: EDN March 20, 2003 700+ words
...typ., low noise, 1.9nV/[square root of Hz] @100kHz, unity gain stable voltage feedback...Input Noise Voltage: 1.9nV/[square root of Hz] typ @ 100kHz 4.5nV/[square root of Hz] max @ 10kHz Input Noise Current: 0.75pA...