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Acchuphase G-18, where in the system
Hi Accuphase lovers,
I write because I have a doubt regarding the best "theoretical" placement of the G-18 EQ in my vintage Accuphase system (see signature). I only have digital sources (the T-106 for now is not used), that is to be considered (the C-280V doesn't need to switch between sources). The switching is done by the DC-81L. The E-303x is now used as power amp (will upgrade in the future, not yet sure to wich power amp). 1) ... DC-81L --> C-280V --> G-18 --> power amp 2) ... DC-81L --> G-18 --> C-280V --> power amp 3) ... DC-81L --> C-280V --> Loop play-rec with G-18 on C-280V --> power amp (this would make sense only if I have more than one source on C-280V, for example if I use the tuner: all sources entering the C-280V will be equalised). In summary: regarding capability to proper drive a power amp, the G-18 is equivalent to the C-280V or is better to leave the C-280V directly before power amp? P.S. sorry for the spelling error in the thread title Last edited by Mattia; 05-04-2016 at 01:01 PM. |
#2
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If it's a mere additional phase shift stage (as in the DC-81L), I would use the recording loop. Martin |
#3
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Thank you Martin!
Sadly I don't have the user manual and the product .pdf of the G-18 on Accuphase website is strangely not that deep compared to other Accuphase gear. Since the unit was launched in 1985, I think the balanced output are likely done a la DC-81L. Btw, the product .pdf states (didn't notice before): "It is recommended to insert the G-18 between the preamplifier and the power amplifier". I don't know the technical reason for this, I thought that a preamplifier is the best option to drive a power amplifier (that is the reason for the thread). One more question: using the G-18 after other Accuphase gear (C-280V if I follow Accuphase advise) should I set the G-18 balanced input impedance to 600 ohms or 40 Kohms? Regarding the C-280V, I have a doubt. Correct me if I am wrong, but one should not use the attenuation to get best results right? From what I read it is not meant to be a "permanent" setting one, but just to be used for example when one has a big pike as with record playing starting. In my chains I generally have too much gain, and if I don't attenuate, I often am between "1" and "2" position on the volume pot. In the other system, with the C-2420, I set the gain selector to 12dB, but I think the attenuator on the C-280V doesn't work on the gain (that is 18dB) but attenuate an already "pre amplified" signal, right? Last edited by Mattia; 05-06-2016 at 06:24 AM. |
#4
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These are all passive elements lowering the level before the actual input amp. I noticed some slight sonic influence, when I used the Balance. I therefore do not think that permanently using Attenuator is a good idea. Low Volume settings on the C-280V may fall into a range where there are some channel differences. When listening to CD, my C-3850 (gain setting +18dB) shows approx. -46.0 (depending on the music material). This represents a -28.0dB attenuation (-46.0 + 18.0 gain = -28.0 attenuation) of the input signal. With AAVA there is virtually no sonic influence of volume setting, but some influence was reported depending on the gain settings. With your C-2420 I would therefore recommend to set the gain to the standard +18dB and turn the volume down. Martin P.S. The output level of the DG-58 is higher than those of DC-37, DP-720, DC-901. Last edited by meltemi; 05-08-2016 at 02:23 PM. |
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