audioequipment
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Tapco Mix.120
You are viewing stuff tagged with audioequipment.
1983: Stereophile’s jubilant review of the first CD player - You see, when the compact disc came into the consumer space, it was a pretty big deal. An entire host of problems were completely eliminated:
… the sound was so opulently gorgeous it almost defied belief! It was a total incarnation of the perfectionist’s wildest dreams: rich, velvety, airy, awesome, liquid, yet incredibly detailed. There were none of the analog disc’s problems. No marginal mistracking, no subtle VTA-error distortions, no disc-resonance smearing, no feedback-induced low-end boom or mud, no ticks or pops or pressing grumbles even at the highest listening levels. And there was no analog-tape flutter or modulation noise or transient-rounding or print-through or hiss.
I’ve been out and about; I am back to write an update.
I’ve spent part of tonight modeling subwoofer enclosures on this great program called WinISD for the Shiva Mark III. The program has an unbelievable help file and a great graphing system. Now I just learned all this tonight, so bear with me: The idea of a ported enclosure is to increase the efficiency of the subwoofer driver; in other words, it makes it easier for the thing to move air when there is a hole in the box. Each driver reacts differently to the same box because they have unique sets of properties. This program allows the user to enter in those properties and then to run box size simulations. In the shot below I have a simulation of a closed box of 66L (4027.6 cubic inches), which is graphed in yellow. See as the frequency drops, the volume that the sub is able to produce in the box drops as well. Going from right to left, the yellow line drops off quite early. However, take a look at the green line. That’s a 100L (17.48” X 16.00” X 30.00”, 6102.4 cubic inch) box that is ported. “Ported” means it has a 4” square air “tube” that guides air out. The length of this tube is precisely calculated by the program as 22.4” (as you can see) and that is what lets the green line on the graph stay up higher. But, “that line drops off as well” you say? Not to fear, I can solder out (there are instructions, don’t worry) two resistors on the 250W plate amp that I am looking at and they will boost the green line by 4dB between 20Hz and 23 Hz, which will bring that green line nearly horizontal (albeit artificially for those last 3 Hz) down to 20 Hz, which is nearly feeling, not hearing, territory. Anyways, the box will be constructed out of MDF (haven’t determined the width) and I am waiting on more information on what to use to acoustically dampen the inside. Either way, I am pretty excited about the project - it has the potential to work. We’ll see, though. We’ll see.
We’re gonna get it! We’re gonna go buy the CDP-CX455! I can’t believe it. Maybe Justin will help me with something I have to do. Maybe not. But we can all benefit from this thing. I’ll ask him sometime. I’ll keep ya posted.
Let’s see:
- MP3 Playback Capability
- CD-RCD-RW Playback
- 400 Disc Changer
- Twin Jog Dial for Easy Disc Access
- Custom File Memo
- MegaChanger Control
- Optical Digital Output
- CD TEXT
- 2 Repeat Modes (Disc or Track)
- Keyboard Input
- FL Display
- 32 Step Program Play
- Control A1 II
- Remote Commander® Remote Control