eldartford
Responses from eldartford
| Woofers Gone Wild Actusreus... Of course the sound is improved. Those pumping woofers screw up the bass and mid frequencies. | |
| Woofers Gone Wild Everyone is talking as if the rumble filter were merely a high pass filter. Actually, a rumble filter mixes the two channels below a certain frequency without affecting pass band (although there is often a subsonic filter included that does that).... | |
| Why terminations on speaker cable? The only reason to have "terminated" wire is to facilitate frequent disconnection/reconnection. Like if you run an audio shop. For most home aplications there are better ways to spend money. | |
| Newbie Q: How do small woofer speakers reach 32Hz? Earphones with drivers smaller than an inch go lower than that. It's all about loudness. A small speaker may respond at a low frequency, but not at a useful volume. | |
| Bi-Amping questions With "passive" biamping each amp must swing the peak-to-peak voltage of the full range signal, so, as Almarg says, no significant power increase will be realized.On the other hand, when you use an electronic crossover (real biamping) at a given to... | |
| What causes turntable rumble Nsgarch...Doc Draper first developed Inertial Guidance for aircraft. The first US Navy Inertial guidance system, MK1, for the Polaris missile was actually a clone of a German design for the V2 which (fortunately) never got into production. Draper'... | |
| What causes turntable rumble Nsgarch...Although I attended MIT I transferred and graduated elsewhere in 1961. BMe. My work involved ongoing relationship (40+ years)with MIT Instrumentation Lab, now Draper lab.The gyro wheel with air bearings is not driven by air jets, but rat... | |
| What causes turntable rumble Nsgarch..."Wiffle grooves" are usually used on air bearings such as those in the gyros of the missile guidance systems I worked with. However, as Elizabeth says, regular journal bearings without grooves do pump oil quite nicely. Go look at any mec... | |
| What causes turntable rumble Nsgarch...A plain journal bearing does not have metal-to-metal contact when the shaft is turning. The turning shaft functions as a pump to keep a film of oil between the metal surfaces.Air bearings work the same way. | |
| Why monoblocks? You don't need a fork lift to move the amp(s) around. | |
| Best sound in old late 70s early 80s receivers Tandberg TR-1055. | |
| Article explaining how CD players work Elizabeth..."Educated guessing" is not an error correcting code. The recovered data, that may contain errors, includes redundant data such that the correct original bits are determined. I won't try to explain it. Google "CRC code".Digital data tra... | |
| Sub/Speaker Crossover? After years of searching for the "correct" crossover frequency I have realized that it doesn't exist. The best frequency depends on the type of music you are playing. The crossover should have an easily adjustable crossover frequency (a knob) and ... | |
| Polarity mystery: Can you help me solve it? Both the woofer and tweeter are connected through a crossover which causes phase shift as a function of frequency (and order of the crossover). At the crossover frequency both drivers are equally loud. You want them to be in phase at this frequenc... | |
| Polarity mystery: Can you help me solve it? Jea48...Some driver manufacturers (JBL for example) use the oposite polarity definition (cone pulls in). |