Thank you for your reply :-) sgmlaw wrote: > As to the reduced volume output on the TP, check the internal > attenuation jumpers. I know on our TP, I have to attenuate down quite a > bit to accommodate a vintage preamp, and that would certainly cause some > volume range issues with more modern gear.
Had a quick look and L & R are both on Zero attenuation, just realised the Beringer is a piece of pro sound equipment so is used to the higher voltage of balanced signals, not the 'low' 2Vrms of domestic gear, this explains the max volume being low, I think! sgmlaw wrote: > Also be aware that using digital volume attenuation in the SB will lose > you some resolution compared to a 100% output with downstream analog > attenuation. If maximum resolution is your objective, you may be better > served with a preamp. Hmmm very good point thank you for mentioning this, I don't want to plug the TP in again directly to the power amp, without having it professionally tested, as I think the blast of electrical buss/humm has aged my speaker by about 40 years or so as they now sound really quite bad :-( It is not going in my main system at all until its got the all clear from a professional, or I'll send it back. But yes thanks for the advice, once I have a correctly working TP I shall try it with a pre and without, to see if I can hear the difference :-) sgmlaw wrote: > For the hum, I would check your cables for a ground loop. If your > cables are directional as to shield, try flipping them. Also make sure > that your input/output impedances for both instruments are within design > limits. Again, placing a preamp between the TP and the amp may also > alleviate that situation. I would also open up the TP to make sure it > is still stock, and has not suffered any poor repairs or mods. The cables are normal RCA single ended cables, so shielding should be connected both ends as far as I know. My SB Touch and my SB2 both work fine straight into the power amp... This is why I am confused!? The output impedance of the TP is 100 Ohm and the input impedance of the amp is 100,000 Ohms, as I understand it 10* 100 Ohms is the minimum for the two to work okay together, the higher the input impedance the better, so we should be fine. But obviously not :-o All looks like new inside, nothing out of place, no iffy soldering, so guessing all original. sgmlaw wrote: > FWIW, I ran a TP direct to amp for about a week while awaiting some > equipment to install. It sounded ok, with none of your hum issues. But > the SB, even at the TP level, is really a front end device, and benefits > greatly from further pre-amplification. They simply dont have the > analog chomps to drive higher end amps all by themselves without some > help. > > I dont care what all the TP fanboys and scopeheads say, looking under > the hood, the TPs analog output stage is unimpressive. And compared to > higher strata DACs, sounds unimpressive. I wound up using the TP as a > digital head end into a separate DAC in the $3-5,000 range. And that > DAC makes the TP by itself sound like a 1979 Walkman by comparison, > primarily due to a vastly superior analog output stage, very robust > power supplies throughout, and extensive overbuild in the conversion > stage. You get what you pay for, and premium build analog stages are > unavoidably expensive. The TP was never more than a $1,000 instrument > inside, and was somewhat overpriced when new due to its market position > at that time. > > However, unless you are prepared to move up to that level, the TP is > still reasonably competitive with todays sub-$1,500 DAC offerings, but > with a good following preamp. Thank you for these points, much appreciated :-) I don't fancy testing the TP in different set ups until I know its not going to harm anything else. But yes I will at some point try it directly into a power amp, then into the TAG as an analogue input, and then as a digital input, just to see what I prefer the sound of :-) I bought the TAG about 12 years ago, boy time flys! bought from an audio repair guy, I did not have it long and was soon on the phone to him, asking if he could make it more musical, its attention to detail was amazing IMO, that is why I bought it, but I missed the involving musicality side of things, the guy said he could try a few things and it came back sounding much nicer, about 4 years after that I pitted it against 2 dacs around the 2 -2.5k range, I came back thinking the repair guy did a fab job! But yes I can imagine 4-5k dacs would improve once again, but ummm yes cash needs to go else where ;-) I had not thought of analogue pre amp after the TP :-) good call :-) I shall try it. Cheers! ------------------------------------------------------------------------ Deaf Cat's Profile: http://forums.slimdevices.com/member.php?userid=515 View this thread: http://forums.slimdevices.com/showthread.php?t=29151
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