Description: Circumaural, open-backed dynamic headphones with detachable 3m cord (straight Y type) Connector type: 1/4". Frequency response: 6Hz–51kHz, –10dB; 14Hz–44.1kHz, –3dB. Sensitivity: 102dB/1V RMS. Impedance: 300 ohms at 1kHz. THD: <0.002% at 1kHz/1V. THD+noise: 0.02 % (1kHz/1V).
Weight: 11.5 oz (330gm) without cable.
Serial Number Of Unit Reviewed: 00262.
Price: $1399.95. Approximate number of dealers: 12. Warranty: 2 years.
Manufacturer: Sennheiser Electronic GmbH & Co. KG, Am Labor 1, 30900 Wedemark, Germany. Tel: (49) 5130-600-0.…
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Digital Sources: Ayre C-5xe & C-5xeMP universal players.
Headphone Amplifiers: HeadRoom Max, Cayin HA-1A.
Headphones: AKG K701 with Cardas Fatpipe cable.
Cables: Interconnect: Shunyata Research. AC: Shunyata Research King Cobra.
Accessories: Shunyata Research Hydra 8V vII power conditioner.—Wes Phillips
As Keith Howard wrote in the August 2008 issue, deciding what, exactly, is the optimal frequency response for a pair of headphones is neither obvious nor trivial. The only measurement I perform on headphones, therefore, is of their electrical impedance, to determine how difficult they are to drive.
The result for the Sennheiser HD800 is shown in fig.1. (I wore the headphones for this measurement.) The impedance ranges between 340 and 650 ohms, which is considerably higher than the impedance of Grados and Sonys. The HD800 will therefore be very easy to drive…
America already had High Fidelity…
Then came two years' National Service in the army. "With a radio-type background, I was put into the REME, the Royal Electrical and Mechanical Engineers, and trained as a radar technician. I studied the two main types of anti-aircraft radar, one of which was the very early type, attached physically to searchlights, with aerials comparable in…
"Well, it was hard bloody work! But of course I was able to use the office facilities, because it was to be published by Blandford, which was part of the Link House group. I had all the backup I needed, secretarial and everything else, all the drawings and so forth, and that eased matters. I had to do all the writing myself, and I had a family with young children, but by that time I had reasonable assistance in the office, so I could give time to the book."
1976 saw John Crabbe's first prolonged absence from the magazine…
By Jim Smith. Quarter Note Press (Cumming, GA), 2008. Paperback, 293 pages. ISBN 978-0-9820807-0-2. $44.50.
Web: www.getbettersound.com.
Good advice is the gift that keeps on taking: The more you give it, the more people want from you. No one knows that better than Jim Smith, an experienced audio maven who doesn't have customers so much as a client list. Smith's audio career has included jobs in retail sales (for years, he and his wife owned one of the most successful high-end audio stores in the southeast), customer-service positions at Audio Research and…
Editor: Just a few comments regarding Art Dudley's review in the July issue (p.107):
1) Get Better Sound is available exclusively from Quarter Note Press, through its dedicated www.getbettersound.com website; by calling Quarter Note at (770) 777-2095; or by e-mail at jim@getbettersound.com.
2) Included with GBS is a free addition to the manual in the form of a quarterly newsletter called (you can probably guess) Quarter Notes. It includes additional tips, plus comments by knowledgeable manufacturers (not about their products, but about getting…