sandyk Posted May 18, 2020 Share Posted May 18, 2020 On 5/12/2020 at 6:59 AM, austinpop said: Chris, I'm really curious to know if RAAL's HSA-1A direct drive amp competes with the best you've achieved with the ARC (or PASS 😎) through the amplifier interface box. Is the HSA-1A on your list? Surely the amplifier interface box contains step down transformers as virtually all Vacuum Tube based amplifiers are incapable of directly driving such a low impedance load ? This also suggest the possibility that high quality Solid State amplifiers may do even better if they also used suitably designed step down transformers in an interface box. How a Digital Audio file sounds, or a Digital Video file looks, is governed to a large extent by the Power Supply area. All that Identical Checksums gives is the possibility of REGENERATING the file to close to that of the original file. PROFILE UPDATED 13-11-2020 Link to comment
sandyk Posted May 18, 2020 Share Posted May 18, 2020 16 minutes ago, The Computer Audiophile said: The interface box presents a 6 ohm load. In which case it must be using a Step Down transformer, and the SQ should be entirely dependent on the quality of the amplifier, whether VT or SS, and personal preferences. "The RAAL ribbon's natural impedance is a near-dead-short 0.018 ohm." How a Digital Audio file sounds, or a Digital Video file looks, is governed to a large extent by the Power Supply area. All that Identical Checksums gives is the possibility of REGENERATING the file to close to that of the original file. PROFILE UPDATED 13-11-2020 Link to comment
sandyk Posted May 18, 2020 Share Posted May 18, 2020 36 minutes ago, fas42 said: Alex, the interface box dumps the amplifier power into a huge array of resistors, in series with the headphones - talk about Green! 😁 https://6moons.com/audioreview_articles/raalrequisite/2/ 5A RMS into 6 ohms is a lot of heat for Ribbons which only need 1/2W There is nothing Green about that ! At least it will be a purely resistive load for the amplifier. How a Digital Audio file sounds, or a Digital Video file looks, is governed to a large extent by the Power Supply area. All that Identical Checksums gives is the possibility of REGENERATING the file to close to that of the original file. PROFILE UPDATED 13-11-2020 Link to comment
sandyk Posted May 18, 2020 Share Posted May 18, 2020 16 hours ago, fas42 said: Just being a bit sarcastic, Alex ... 😉. Frank These headphones are intriguing, as they would appear to be far more accurate than Loudspeakers which often have marked impedance changes over the Audio bandwidth due in part to XOver networks . As many higher powered Vacuum Tube amplifiers need to use Output Transformers to drive low impedance loads, it would appear that something like a 50W/Channel Class A amplifier which should have a natural warmth due to no crossover distortion , and a decent bandwidth, would be ideal, and with a much flatter extended frequency response than when using Output Transformers. This would appear to make them ideal for High Resolution music playback. It's a shame that they are such a damn low impedance though. I am not surprised that Chris loves them so much . I am envious . Alex fas42 1 How a Digital Audio file sounds, or a Digital Video file looks, is governed to a large extent by the Power Supply area. All that Identical Checksums gives is the possibility of REGENERATING the file to close to that of the original file. PROFILE UPDATED 13-11-2020 Link to comment
sandyk Posted May 19, 2020 Share Posted May 19, 2020 53 minutes ago, ShawnC said: I'd be curious if anyone could get a hold of an old Krell amplifier like this, or a high powered one and try it out. Better still, a pair of 100W Nelson Pass Class A Monoblocks . Perhaps a good test for typical Class D amplifiers too ? ShawnC 1 How a Digital Audio file sounds, or a Digital Video file looks, is governed to a large extent by the Power Supply area. All that Identical Checksums gives is the possibility of REGENERATING the file to close to that of the original file. PROFILE UPDATED 13-11-2020 Link to comment
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