cliveb <cliveb.7fy...@no-mx.forums.slimdevices.com> writes: > rkrug wrote: >> Mnyb <Mnyb.7fxb2n (AT) no-mx (DOT) forums.slimdevices.com> writes: >> >> > Any DAC would suit an old amp basically , maybe you need passive >> > attenuators ( rothwell is brand I bougth for this purpose ). >> >> I am looking at them at the moment. And as the amplifier has two >> connectors for accessories between pre-amp and power-amp, I could put >> them between the pre-amp and the power amp. > If you're thinking of putting passive attenuation between the preamp and > power amp, an obvious thing to try would be to just bypass the preamp > completely. Connect the output of the Touch (or DAC) directly to the > power amp via the attenuators, and just use the Touch's digital volume > control. That way you're taking the preamp completely out of circuit, > with potential sonic benefits.
Would be better, but I have at the moment two inputs (squeezebox and tv) into the pre-amp, and I will have a radio tuner hopefully soon again. So this is unfortunately not an option. > > If you're planning to always go via the preamp, there's no point adding > passive attenuation - just use the preamp's volume control to set the > gain staging. Now I am confused - I thought the whole idea of the passive attenuation is to have the volume control of all units in the upper half / third and not in the lower third. At the moment, my amplifier runs at the lower third, and the other inputs (squeezebox / pi and TV) at upper third. As I understood Mnyb, I could use the passive attenuation to lower the gain. As this applies to all my inputs, I assumed that I could put it between pre-amp and power-amp. This is also stated at the rothwell website http://www.rothwellaudioproducts.co.uk/html/attenuators.html : --8<---------------cut here---------------start------------->8--- Although the attenuators can be used on the inputs of the pre-amp in exactly the same way as they would be used on an integrated amp (with the same benefits), alternatively they can be used between the pre-amp and the power amp to even greater effect. When used this way, not only is system gain reduced by 10dB, but the signal to noise ratio is improved by 10dB. This pushes the noise floor down enough to create an inky black silent background from which the music can emerge with better resolved fine detail and transparency. --8<---------------cut here---------------end--------------->8--- Maybe I am missing something here? > > rkrug wrote: >> Now the question remains, which ones: -10 or -15? > Start off by turning the Touch's volume all the way down, and connect it > (or DAC) directly to the power amp without attenuators. Then play > something that you like to listen to loud. Slowly turn up the Touch's > volume until it's as loud as you'll ever want. The Touch's volume > setting will give you an idea of how much attenuation you need (ie. so > that when you add the attenuators, the Touch's volume would have to go > up to 100% to get as loud as you would ever want). I don't have a Touch > so I'm not sure how its volume settings map to dB values, but I'm sure > someone on here will be able to tell you. I don't have a touch either - squeezelite player on pi with external (cheap) DAC. > > > > Transporter -> ATC SCM100A > ------------------------------------------------------------------------ > cliveb's Profile: http://forums.slimdevices.com/member.php?userid=348 > View this thread: http://forums.slimdevices.com/showthread.php?t=105611 > > _______________________________________________ > audiophiles mailing list > audiophiles@lists.slimdevices.com > http://lists.slimdevices.com/mailman/listinfo/audiophiles -- Rainer M. Krug email: Rainer<at>krugs<dot>de PGP: 0x0F52F982
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