Michael YYZ
Member
Where is this company/brand, Topping, based?
China.Where is this company/brand, Topping, based?
@ the rate of releasing this kind of well spec'd electronic product ChinaFi will be a major tour de force globally. Push the wankers to release some proper better product.I love ChinaFi haha. Specially IEMS
Seriously? You achieved engineering excellence on the performance side, and I sincerely admire what you did there (even a bit jealous tbh).M400 RCA output supposedly have buffer but they fked up the LPF. It pairs with E30 and D10s so no issue from my point of view. 2.5K is low in your book. But higher than 600ohm means high to me.
You'de need $100.00 in tools to service it. It's a $130.00 amp. sigh*Performance is impressive. But who needs such a performance which is way beyond audibility? And how about longevity of the unit? And repairability?
I value interference rejection more. The cable can pick up a lot of noises. Also majority of products on the market have 100 ohm output impedance. If you have higher output impedance, all you can lose is a bit of volume. If the output filter transfer function is depending on the downstream input impedance, then it's a fail product.Seriously? You achieved engineering excellence on the performance side, and I sincerely admire what you did there (even a bit jealous tbh).
But you can't just say that since it pairs well with two of your employer's current offerings your job is done.
600 ohms is high in the mind of somebody designing an headphone amp, somebody designing a line output stage is expecting much more.
You never know what will be available in the shops.In Wolfs test of a pre-production unit it was really bad.
Either. E30 is better on the look. D10s is cheaper with less functionalities but essentially the same performance.@JohnYang1997 which dac do you recommend together with this amp, E30 or D10s?
We are on the same line here but I had something else in mind.I value interference rejection more. The cable can pick up a lot of noises. Also majority of products on the market have 100 ohm output impedance. If you have higher output impedance, all you can lose is a bit of volume. If the output filter transfer function is depending on the downstream input impedance, then it's a fail product.
It's fine. Ap does have selection of 300 600 and 100k ohm load selection tho. But imo irrelevant to the point. 2.5k is relatively low among different products, yes.We are on the same line here but I had something else in mind.
If you have an output buffer to design while chasing THD+N, you know better than I do that the lower the feedback resistors value, the lower the N, but the higher the output current, which means higher THD (for the same amount of feedback). So a compromise has to be done while assuming a typical load.
If the requirement is best ASR SINAD, target load will be the AP555 input impedance, i.e. 100k.
Real word matching requirement would be something like 20k to 50k.
I am maintaining that 2.5k is low.
Out of curiosity, would it be possible to have 3 multitone measurements from E30, L30, and E30+L30? (or D10s instead of E30, don't care).Either. E30 is better on the look. D10s is cheaper with less functionalities but essentially the same performance.