Deaf Cat wrote: > Yes re-erecting a nice old thread :-) > > Not long purchased what looks like a nice example of a Transporter :-) > > However - Plugged it in for a quick test, Transporter unbalanced > outputs -> Behringer X-air (basically a pre amp with eq) -> Mackie > powered speakers > All sounds good, Transporter needs to be turned up max to get a normal > input signal to the X-air and works nicely. > > BUT - I would like the transporter to replace my Squeezebox touch > and TAG pre amp / dac, so the Transporter will go straight in to my > Adcom power amp (unbalanced). > > Even when the TP is not playing and muted I get a loud electrical > buzzzzz/hummmm and have to switch power amp off Fast! Yeah it seems if > the TP volume is say half way the buzz is deafening!! > Only tried it twice with a re-plug in to the x-air in between... x-air > / mackie output musical and fine. > TP straight in to the Adcom NOISE... ??? > > I have tried my touch and SB2 straight in to the Adcom and works as it > should, same leads but with the TP in place, bad buzzzhmmm ?? > > I am confused any thoughts / pointers much appreciated > > Cheers > :-)
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. 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. 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. 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. ------------------------------------------------------------------------ sgmlaw's Profile: http://forums.slimdevices.com/member.php?userid=13995 View this thread: http://forums.slimdevices.com/showthread.php?t=29151
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