lol, well he did ask for it.
Very good response btw, full of good insight!
--
http://www.myspace.com/hawkinnc45
remove "spamtrap" in return address for replys.
http://web.nccray.net/jshodges/mommasaid/sss.htm
20% of all sales goes to the local food pantry.
Accepting any and all donations of pro audio equipment.
Thanks so much to those who have responded.
"Arny Krueger" wrote in message
...
"duty-honor-country" wrote
in message
oups.com
On Mar 26, 9:30 am, "Arny Krueger"
wrote:
"DeserTBoB" wrote in message
25-20 KHz at what level and with how many dBs
tolerance? If you can't provide those two key
addiational parameters, you're talking marketing crap,
not technology.
OK Arnie K- please evaluate this BIC T-4M deck- here is a
complete spec and review writeup- please tell me how the
dB's tolerance and levels shown in these tests, affect
this unit. It seems to have quite wide FR to me.
http://i9.tinypic.com/352re5f.jpg
http://i11.tinypic.com/4dgxj7p.jpg
http://i9.tinypic.com/2qcngyd.jpg
I do value educated, experienced opinions, backed by
fact. There are graphs for various levels and FR. Have
at it. Tell me how this vintage BIC 3.75 IPS cassette
deck, is "junk".
While I'd prefer to actually test the machine up front and personal, the
supplied test report is damning enough.
Please focus your attention on figure 3, the lower two plots, taken at
your preferred operational speed of 3.75 ips.
The upper of the two lower plots is taken at 3.75 ips and 0 dB. It does
not shed any light on response at 20 KHz becasue data stops at 15 KHz,
where response is already a whopping 7 dB down. Response is reasonably
flat from 400 Hz to 5 KHz. There is an approximate 1 octave rise that
averages about 1 dB, centered at about 100 Hz. This might cause a slight
thickening of the sound of a variety of instruments with strong response
in the 100 Hz range, such as pipe organs, bass guitars, etc.
Treble response is about 3 dB down at 10 KHz, and rolling off at 12 dB or
more per octave. This should be clearly audible as a noticable dulling of
the upper treble range. This will take the live edge off of brushed
cymbals, etc.
The same data taken from a CD burned on a PC and played on a $39 DVD
player is flat within a few tenths of a dB from 20 to 16 KHz, which along
with normal extensions of response outside this range, is sufficient to
eliminate any perceptible change in the sound quality of musical
recordings. The same is true of iPods and portable digital recorders such
as the Microtrack operating on 16/44 .wav files.
A modern digital recorder that was 3 dB down at 10 KHz would be called
"junk" by just about any knowlegeable person. One of the lowest quality
kinds of digital players around is the analog audio section of a
computer's optical (CD or DVD) drive. For years they have all been within
1 dB or better of flat at 10 KHz. Of course, in digital mode, these same
players are perfectly flat and add no distortion.
I believe this test you asked me to review was published in Audio
Magazine, February 1980. This was prior to the introduction of the CD
player by about 3 years.
IME, what really deep-sixed the cassette format in the ears of discerning
audiophiles such as myself was the fact that it was impossible to use a
cassette machine operating at either 1 7/8 or 3 3/4 ips to make sonically
identical transcriptions of a wide variety of CDs. Of course, the same
was true of open reel tape up to at least half track and 15 ips.
Based on my own personal measurements of cassette recorders, this BIC deck
must have been a high point of the development of the cassette recorder
and George W. Tillet (GWT) was a wizard on the test bench.
For example, most cassette tapes shift their characteristics enough from
end to end that GWT had to be very careful how he made his measurements.
The machine was probably carefully adjusted for this exact sample of
cassette tape. Using a different cassette from the same batch, or even
removing and replacing the cassette in the well, might lead to far less
impressive measurements. Compare this with digital recorders that produce
the identically same response with any of very many different pieces of
media from various batches and sources.
--------------------------------------------------------------------------------
I am using the free version of SPAMfighter for private users.
It has removed 2594 spam emails to date.
Paying users do not have this message in their emails.
Try SPAMfighter for free now!