There seems to be a bit of confusion regarding my previous post on the volume control issue I am having, so let me describe the issue in more detail.
First of all, this issue has nothing to do with the correlation of the displayed dB level as a function of the amount of turn of the volume knob. That is a known issue addressed and resolved in a previous post and attributed to the 1-bit of data being fed back to the digital monitoring of the analog volume control. Before continuing with the issue at hand, let me briefly review how my HA-1 reacts to remote volume change commands.
The HA-1 appears to have two discrete volume control functions via the remote:
1) If you briefly press a volume +/- button, a microadjustment occurs of 0.5 dB in the direction of your press (sometimes the knob will rotate a little bit less, sometimes a little bit more and that aspect is not at issue here).
2) If you hold a volume button for half a second or longer, a larger adjustment occurs and the volume increases/decreases as long as you keep holding the volume button.
In the second case above, the volume knob does not accelerate as you continue holding, except for the brief initial start-up acceleration necessary to get it spinning which happens in less than a quarter of a second's time. However, when you let go of a volume control button on the remote after a non-microadjustment (i.e., an adjustment of more than 0.5 dB), the knob keeps on spinning, as if the unit (or knob) is slow to react to the remote's command to stop for about a half-second to a solid second after you have let go of the volume button you pressed. This causes the volume setting to go approximately 2 dB over/under the level you intended forcing you to press the opposite volume adjustment button three to five times (i.e., three to five microadjustments) to compensate for the undesired overshoot in volume change. This only happens when you hold a volume button for half a second or longer, so basically every time you want to make an adjustment of more than 0.5 dB (i.e., practically every time you want to change the volume). I don't know if my specific unit has this problem or all units do, so let me give you a specific example you can try with your HA-1 unit:
1) First, physically set the volume knob to the 3 o'clock position by hand (don't bother looking at the numbers on the display, they're irrelevant for this exercise).
2) Then, increase the volume to the 4 o'clock position of the knob via the remote. To do this, hold the + volume button for about half a second or so on the remote, until the volume knob spins to the 4 o'clock position.
4) As soon as the volume knob nears the 4 o'clock position, let go of the + button on the remote.
5) On my unit, the knob continues spinning and stops just short of the 5 o'clock position, causing in this (rather extreme) case double the increase in volume that I had intended (i.e., approximately a 6-8 dB increase instead of a 3-4 dB increase).
6) Press the - volume button in short bursts 3-5 times to get it back to the intended 4 o'clock position via (0.5 dB) microadjustments in the opposite direction.
Now, does this not seem like a lot of work to get a slight increase in volume (i.e., say about 4 dB, give or take)? By the way, none of this has anything to do with the (accuracy of the) dB numbers displayed on the display of the unit, since as mentioned several times already, the dB display issue is a known issue and is not the point of this post. This is a purely functional issue having to do with the motorized volume knob's response to commands best summarized as:
The volume knob does not respond to a volume button being released in a timely and reasonable manner.
A little bit of delay in response (i.e., knob drift/overshoot) is normal for a motorized volume control. What is happening is an extreme amount of drift, much more than I have seen on any motorized volume control before.
Perhaps my unit is defective. Therefore, I would really appreciate it if others with an HA-1 try the steps above and report on your particular results.
Thank you for reading my long winded post if you got this far!