The ZX707 won't have the same power output as the Mojo 2. The Mojo 2 spec is 600 mW into 30 Ohms (4.2V RMS). The uncapped ZX707 does 230 mW into 16 Ohms (1.9V RMS) over its balanced output, and 50 mW from its 3.5mm output.
I have serious doubts about the measurements of the 707 Japanese version. I explain. In a direct comparison with the Fiio Q7 in ultra high gain (3W per channel at 32 ohm) and using the Focal Elegia (with Dekoni Sheepskin pads) for 4.4mm. Well, the 707 offers exactly the same power, body and output volume in high gain only with 22-23 steps more volume. I mean, what in the Fiio is resolved with 40/120 in the Sony we only go to 62-63./120. Don't ask me how it is possible, but the only explanation is the Sony's 100% digital amplifier type. It sounds really impressive with the Focal Elegia and without any need for EQ.
I have serious doubts about the measurements of the 707 Japanese version. I explain. In a direct comparison with the Fiio Q7 in ultra high gain (3W per channel at 32 ohm) and using the Focal Elegia (with Dekoni Sheepskin pads) for 4.4mm. Well, the 707 offers exactly the same power, body and output volume in high gain only with 22-23 steps more volume. I mean, what in the Fiio is resolved with 40/120 in the Sony we only go to 62-63./120. Don't ask me how it is possible, but the only explanation is the Sony's 100% digital amplifier type. It sounds really impressive with the Focal Elegia and without any need for EQ.
You need 4x the power to double the volume. That means 200mW is double as loud as 50mW. To be double as loud as the ZX700, you would need 920mW. And to double that, you would need 3680mW
Also volume meters are not linear. Some Devices get to go 50% volume with just 10 steps and then use 50 steps to go from 50% to 70% or something like that.
The M11 Plus (660mW @ 32 Ohm) for example has a significantly lower volume at 001/120 low gain than my 125mW @ 32 Ohm WM1ZM2 at 001/120 Low Gain, even though it has ~5x the power.
So these are the reasons for your experience. You need 4x the power to double the volume + volume meters are not linear
Quick question, is the output for the zx707 able to do what the chord mojo 2 does? Running the HD700 and Ibasso SR3. I had the 507 that struggled with the LCDi4. But I'm not powering the LCDi4 anymore with daps. I realise they are completely different but if a nice dap that has the musically of the mojo 2. I'll buy another one. If Sony has the power I'll sell the 507 and get a 707 in an instant. But I suspect it won't against the mojo 2. I can do without a DAP but if the 707 is platinum, I'll get it. I love the players without shelf chips
You need 4x the power to double the volume. That means 200mW is double as loud as 50mW. To be double as loud as the ZX700, you would need 920mW. And to double that, you would need 3680mW
Also volume meters are not linear. Some Devices get to go 50% volume with just 10 steps and then use 50 steps to go from 50% to 70% or something like that.
The M11 Plus (660mW @ 32 Ohm) for example has a significantly lower volume at 001/120 low gain than my 125mW @ 32 Ohm WM1ZM2 at 001/120 Low Gain, even though it has ~5x the power.
So these are the reasons for your experience. You need 4x the power to double the volume + volume meters are not linear
I have the impression that the Sony digital amplifier is not equivalent in measurements to the analog ones of most daps. In fact, a while ago I read an article where a Sony engineer talked about something like that. The same thing happens when you connect the 707 as a preamp to an amplifier: it sounds very good without being a line-out. The day Tidal or Qobuz work like Spotify, allowing you to choose to play the Walkman from your smartphone, the 707 will become a great streamer for hi-fi services.
It seems that I am very happy with my Sony ZX707, right?
The most easy way to check is to see if it has High-Gain. If it has High-Gain, it is the uncapped model with 200mW and should be able to push them to around 130db (absolutely not recommended).
At 4.4mm(!) that is important. At 3.5mm it has 1/4 of the power.
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