donthuang
500+ Head-Fier
- Joined
- Oct 11, 2006
- Posts
- 524
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- 79
Courious about the op-amp of the HEADPHONE AMP part.
Anybody here know what the op-amp is ?
Anybody here know what the op-amp is ?
Originally Posted by Herandu /img/forum/go_quote.gif Before I officially start at 9.00AM and that new IT guy start logging network traffic during working hours Ijust want to slip in a few words. Ed doesn't. I also suspect that he is back tracking after having consulted TCC and they put him straight on a couple of things. Stanley did seem very unwilling to criticize Phonopreamps in any way. |
Herandu;2632787 said:What is said off record can sometimes be the answer others seek. Before we jump to any conclusion about whether the two units are identical, we should perhaps take note of what Stanley said about the MKIII, and its divergence from the TCC version.
Originally Posted by thubble /img/forum/go_quote.gif but the mids are recessed and grainy with no detail. I'll give it some time to see if this improves. |
Originally Posted by thubble /img/forum/go_quote.gif Note that I'm using the included Toslink cable, which someone said can cause a "coarse" sound. Is this true? ....... I also don't have a coax cable. |
Originally Posted by hortiholic /img/forum/go_quote.gif These are in some cases the same people who have been hyping the Beresford on this and other forums. |
Originally Posted by jandl100 /img/forum/go_quote.gif Yup - that's how it sounds before a day or 3 of run-in. A little patience is required here - you really don't want to make any judgements yet! It's certainly my experience that the co-ax connection is substantially better in terms of midrange openness and sweetness. I'd guess that even using a standard analogue interconnect as a digital connector would be an improvement - a good digital co-ax lead would be even better. |
Originally Posted by jandl100 /img/forum/go_quote.gif Oh dear - we're not going back to this "shill" business are we? - I had hoped that was all sorted & laid to rest by now. Just cool it, huh? |
Originally Posted by jandl100 /img/forum/go_quote.gif Oh dear - we're not going back to this "shill" business are we? - I had hoped that was all sorted & laid to rest by now. And the whole tenor of some recent posts has leaned toward the unpleasant and judgemental - if not downright nasty and personal. Just cool it, huh? |
Originally Posted by hortiholic /img/forum/go_quote.gif Oh really. The fact is that it is continuing to be suggested in this discussion that the Phonepreamps TC-7510 is "inferior" to the Beresford TC-7510. The fact is that some of these suggestions come in the wake of conversations with Stanley Beresford. The fact is that Ed and Stanley Beresford (as quoted by Herandu) both say that the two dacs named above are identical. The fact is that people who are choosing between the two deserve an answer. This is not crying "shill" -- or "judgmental". I would rather we discuss the topic at hand and not use labels. Russell |
Herandu;2634417 said:Open up your TC-7510 and look at the location of your DAC from the same position that Gone4T has taken a picture of his. Now compare them and see if they are the same. [END QUOTE]
This has been addressed in posts number 132 and 141 and elsewhere. As Gone4T clearly stated, he has an early 7510 (aka Mk1), before TEC specified and began implementing the mods that led to the updated 7510 (aka Mk2). The mods (as Ed thoroughly documented in his message to me), comprised a change in several resistors. I have photos from Ed (the ones from TEC recommending the mods) that clearly describe the changes. The reisistors in my TC-7510 from Phonopreamps have indeed been upgraded from those in Gone4T's unit (as pictured in posts 3 and 5 of this thread), precisely as specified by TEC in the photos sent by Ed.
The photo of Gone4T's unit to which you refer is a later photo than the ones in posts 3 and 5 and includes Gone4T's own mods, so of course it is not the same as either my unit or the Beresford unit.
As for the lower price on Phonopreamps' initial E-Bay listing, the first units sold by Phonopreamps were (according to Ed) sold BEFORE TEC recommended the upgrades to the TC-7510 (which according to Ed was in November 2006). The ones sold at the higher price include the upgrades, which Phonopreamps makes themselves, following and in fact apparently exceeding the specifications and recommendations from TEC.
Stanley apparently sold the pre-update model as the Mk1, and the post-update as the MkII. Quotes from Stanley ("So the later TCC and MKII are indeed the same" -- post 149) and the email from Ed to me both state that the MkII is the post-upgrade TEC TC-7510. That is, it is identical to the TC-7510 unit sold by Phonopreamps.com. Neither Stanley nor Ed say that any other upgrades from the pre-upgrade, "MK1" model are contained in their units.
Herandu;2634417 said:Mind you, I personally think this is all irrelevant. [END QUOTE]
You and others on this forum have repeatedly suggested that the "MkII" and the TEC-7510 sold by phonopreamps ARE different (posts Nos. 125, 127, 128, 129, 131, 136, etc.). Many of these posts cite Stanley as the source of this claim.
This couldn't be more relevant to someone trying to choose between these units. Are they or are they not the same? If I'm in the U.S. do I buy the Phonopreamps unit or do I fork over the extra money and wait the extra few weeks for the Beresford unit?
At this point, unless someone comes up with some actual evidence to the contrary, I'm going with the evidence from the photos I've seen and from the quotes from Stanley (direct and attributed) and the email from Ed -- that the two are the same.
Russell