almarg
Responses from almarg
| Rowland 625 versus Audio Research DS450 07-25-11: AudiozenThe two factor's I look at for class D is the ampere output, and the db level the amp can achieve before signal break up occurs. The Bel Canto's can be taken all the way up to 130 db's before strain occurs. That's damn impressive... | |
| Is preamp remote volume a deal breaker for you? 07-26-11: AtmasphereThe standard for balanced line is the output of the device driving the cable should be able to drive 600 ohms or less (in the case of microphones) without degradation (this calls for a fairly low output impedance BTW). If the c... | |
| how can a cheap cd drive equal a fine transport? An "error correction" concerning terminology :-)By definition, "error correction" CORRECTS errors in the data that is read from the cd, producing a bit-perfect result. That occurs routinely and frequently, with both computer data cd's and music cd... | |
| Thoughts of Pass XA30.5, 60.5 What would the sound become if the impedance drops to 15K balanced or 10K unbalanced?The rule of thumb for proper matching of preamp output impedance and power amp input impedance is that the power amp input impedance (or the combined impedance of... | |
| Cable 101: input output imped IMO, given that you are driving balanced cables from an output impedance that is low and constant, the connection to all of the amps should be essentially cable independent. At least assuming that cable capacitance is not unusually and unreasonabl... | |
| active or passive preamp for active speakers i guess i don't understand the purpose of the preamp. since my active speakers don't have volume control, it seems the only thing i need a 'preamp' for is volume control, assuming at least that the signal coming for the cd player is strong enough.... | |
| Thoughts of Pass XA30.5, 60.5 One thing to be careful of is the load impedance that would be seen by the preamp. The XA30.5 has an input impedance of 30K balanced and 20K unbalanced. If the preamp were driving two XA30.5 inputs, and if the preamp has two pairs of outputs that ... | |
| Looking for ac outlet with no sonic signature IMO, from a technical standpoint, there is no reason to expect the sonic effects of an outlet, if any, to be consistent or predictable from system to system.Regards,-- Al | |
| Power On First/Off Last Device? 07-23-11: RlwainwrightI fail to see why it makes much of a difference at all what order you use for turning equipment on and off. If you're worried about power-on transients, simply turn the volume pot on your preamp all the way down while turning... | |
| SS amps with little or NO feedback Also, the Modwright amplifiers have zero global feedback, and by most if not all accounts are outstanding performers in their price range.Best regards,-- Al | |
| SS amps with little or NO feedback CODA Technologies amplifiers use no global feedback. The company was founded by former employees of Nelson Pass in his Threshold days.Unsound's suggestion of some of the older Threshold amps may be a good way of obtaining a no global feedback amp ... | |
| How many forms of Jitter can you identify? Bombaywalla, thanks for the explanation.The logical follow-up question would be how significant is all of this from a quantitative standpoint? The data on page 3 of the reference you provided addresses that question, although the various terms and... | |
| How many forms of Jitter can you identify? The CD disk is made of plastic & some organic dies that hold the digital data. The plastic structural material is not non-magnetic. Thus, when the laser light hits the plastic underside to read the data, over time the plastic gets mildly magne... | |
| How many forms of Jitter can you identify? There is a good summary of ten potential contributors to jitter in this paper by Steve Nugent of Empirical Audio, about a third of the way down the page. Note that items 2 and 3, which pertain to the pits on the cd itself, and the electromechanica... | |
| Must Hear Speakers in $10K range A third strong recommendation for Daedalus!You'll have to stretch your budget a little, though, for the top of the line Ulysses model, especially if you opt for the upgraded all-poly crossover, which by all accounts significantly improves an alrea... |