This subject of the output impedance. I think it explains why some DACs drive a power amp direct better than others. But what happens with the volume pot in the GG? How does that affect output impedance I wonder.
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- Thread starter Mr P
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This subject of the output impedance. I think it explains why some DACs drive a power amp direct better than others. But what happens with the volume pot in the GG? How does that affect output impedance I wonder.
It's a stepped resistor ladder, not a volume Pot.
Quite frankly, if the 10:1 rule works here, you need Power amps with 15k ohm input impedance or more and that is quite common. I am sure there is more to ideal matching that just the one measure.
incidentally, in the older lampi Dacs with small signal tubes (not the DHTs) output impedance was in the range of 600 ohms. I suspect the Atlantic line is similar.
Quite frankly, if the 10:1 rule works here, you need Power amps with 15k ohm input impedance or more and that is quite common. I am sure there is more to ideal matching that just the one measure.
incidentally, in the older lampi Dacs with small signal tubes (not the DHTs) output impedance was in the range of 600 ohms. I suspect the Atlantic line is similar.
A quick update on my GG2. I have 200+ hours on it and no longer hear significant changes. In my system notable areas of improvement over my upgraded GG include 1) reduced noise floor and all the associated benefits that come with it, 2) improved dynamics, 3) increased weight/heft to the music and 4) an improved midrange that increases realism of voices and instruments. Together these changes move the GG2 to the next level of performance. I am using Westinghouse replica 101Ds with my 300B amp and KR-PX4s with my solid state amp with very good results. I am using a KR 5U4G rectifier for both. I will need to experiment with my NOS rectifiers next month. Overall I am extremely pleased with this upgrade. Merry Christmas to all!
I have a new Golden Gate 2 dac for sale. Here is a link to the for sale ad.
It has an I2s input as well.
http://www.whatsbestforum.com/showt...Input-4-x-V-Cap-CuTF-Caps&p=494355#post494355
It has an I2s input as well.
http://www.whatsbestforum.com/showt...Input-4-x-V-Cap-CuTF-Caps&p=494355#post494355
Hi, any new owners of the GG2? Please, share your experiences.
I am about to place an order for the GG2. After several communications with Lukasz and based on his recommendations, I've decided to go for the following configuration:
I am about to place an order for the GG2. After several communications with Lukasz and based on his recommendations, I've decided to go for the following configuration:
- SE version with Dual mono R2R (includes separate DSD)
- KR Ricardo Kron 300B + KR242
- No R2R Filter
congrats.
you are in for treat
Do order the new RK KR 5U4G recti as well
I haven't heard that recti myself but it is said to be excellent
you are in for treat
Do order the new RK KR 5U4G recti as well
I haven't heard that recti myself but it is said to be excellent
I am interested in the latest USB designs. I am curious if it can surpass other inputs such as using Ethernet or Ethernet to SPDIF. Any ideas on current performance on that? I left USB about 2 years ago but there have been steady improvements since then.
Yes, I plan to. I have a description of the new Superamanero. It should be amazing. 6 ultra low noise power supply lines instead of 2 standard ones, two Crystek clocks with independent power supplies, custom firmware etc.
I will check, but it should be part of the standard configuration.
I will check, but it should be part of the standard configuration.
Instead of the recti I will first spend my budget on alternate output tubes. I haven't heard the RK but compared KR to Tak. Both sound very good, and won't change what you like about the dac.
The 242 is the best when it works... Nothing comes close. But often it doesn't, it is something to do with impedance match with the pre and gain of the system. You will only know after trying. So, if it doesn't do its magic, the other output tubes will make a hell of a difference, between rejection and acceptance. Normally I would have suggested the PX25 and the special Lampi EML 45s, but now he has new tubes and the 845 which he says is the best. So save on the Tak recti and put the money here
2 pairs of output tubes should be enough to start with. I can also swap my Takatsuki 300B with RK 300B in the amplifier and try Takatsuki in the Lampi. That would be a 3d pair of output tubes
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