kijanki
Responses from kijanki
| Amp Specs esp. DampFactor : Citation, Adcom, etc. Aewhistory,Amount of gear sold here shows that problem is common. Maybe local dealer will lend you an amp or will let you bring your speakers (my did). Going by spects (especially DF) will be fruitless IMHO. Inductor in series with the woofer limi... | |
| Class "D" amp? I do not have a clue. Do you? Psag, Class D and SMPS operate on the same principle (PWM). Class D was invented when designers of SMPS showed that response to reference voltage is so fast it can play the music. | |
| Amp Specs esp. DampFactor : Citation, Adcom, etc. Aewhistory - don't base your decisions on specifications. High DF and low THD, IMD are most likely a result of deep negative feedback that increases TIM (Transient Intermodulation) causing unpleasant bright sound. I would even suspect that sound m... | |
| Negative Feedback a deal killer? Shadorne,Absolutely true, but linear power supplies also create HF noise in the AC mains by drawing current in short narrow spikes of huge amplitude. They are practically switchers at 120Hz. Modern SMPS with zero current / zero voltage switching c... | |
| Class "D" amp? I do not have a clue. Do you? 6550 - The problem here is that SMPS is small. It is hard to believe that something smaller can be better. It is line and load regulated and basically the same thing as class D amps that win Stereophile class A classification.It is difficult to ch... | |
| Class "D" amp? I do not have a clue. Do you? It is also possible that new generation is just only a little bit better (like BC Ref1000M with extra power supply caps) and "new generation" allows some critics to reevalute (read: save face) since others scored them much higher. For instance REF... | |
| Negative Feedback a deal killer? Michael_moskowich,Rowland uses SMPS in all class D models (including integrated). In higher models like 312 or integrated Continuum he uses additional PFC unit. For the rest like 102,201,501 you can buy external PFC unit. Such unit supplies about ... | |
| Class "D" amp? I do not have a clue. Do you? "I'm convinced the better Class D amps are those that pay special attention to the power source on-board."Mapman - That would explain better reviews for BC Ref1000mkIIvs. original Ref1000. Same Icepower module (1000ASP) with built-in SMPS but new ... | |
| PC audio with S/pdif input only I use Airport Express with my Mac Mini and Benchmark DAC1. There are two issues with Airport Express- it is limited to 16 bit- it looses clock between songs making some DACs skipping first second of next song (time to sync). Benchmark doesn't do t... | |
| Negative Feedback a deal killer? Magfan - ASC series has also SMPS. I think that it was AP series but now Icepower makes different modules.B&O SMPS are pretty good - very quiet (zero voltage / zero current switching) and very strong (1000ASP can deliver 40A output for 0.5s). ... | |
| Negative Feedback a deal killer? Magfan - local feedbacks are always better than global one but their application is limited. Class AB amp design has to start with excellent linearity and wide bandwidth since one of conditions to eliminate TIM is to limit bandwidth at the input t... | |
| Negative Feedback a deal killer? Dob,Mentioned Rowland 102, 201, 501 have standard SMPS without anything coming from Rowland. You can buy amplifiers with built in PFC like model 312 or buy additional power supply but most of Rowland Icepower amps have only standard B&O module... | |
| Negative Feedback a deal killer? "better dynamic range then all others based on tiny switching power supplies (again - huge exception is Jeff Rowland)" Not only that most (if not all) of Rowland Icepower amps use SMPS supplies but he uses them as well in Capri preamp and new gene... | |
| Signal Direction XLR to RCA? Which way? Rickschell - it's easy to remember if you know the reason. XLR input sides (of component or cable) are always female to prevent touching input (recessed contact). In addition XLR connectors are locking. It was intended for studio/concert environme... | |
| Negative Feedback a deal killer? "50us/0.2us = 500" ? |