- Any info on the PHA-4 keybed in the Roland A-88 MkII? Is it comparable to the TP-40 on the SL88 Grand?
PHA-4 STANDARD
This is the key action featured on Roland’s entry-level and intermediate-level digital pianos, such as the instruments in the FP-series (aside from the FP-90), RP-series, etc.
The PHA in the name stands for
Progressive Hammer Action, which attempts to emulate the graded feel of real pianos.
On an actual piano, the lower notes are heavier and harder to press, whereas the upper keys are lighter. The PHA key actions simulate this feel by using variable weights and tends to do a good job in general.
Despite being on the lower-end of Roland’s key action selection, the PHA-4 Standard action feels surprisingly good and is arguably the best entry-level hammer action on the market.
The keytops feature synthetic
ivory and a matte finish to prevent slippage, and
triple sensors ensure that keypresses are detected accurately, even on rapid repetitions.
PHA-50
The PHA-50 action has succeeded the previous
PHA-4 Premium and
PHA-4 Concert key actions used in high-end Roland instruments.
This is a significant upgrade over the PHA-4 Standard action and incorporates a hybrid material construction featuring
real wood to make it feel even more realistic.
PHA-50 Hybrid Wood/Plastic Keyboard
The PHA-50 action also uses
triple sensors and they are tuned to be even more reactive to velocity, making the overall playing experience a lot more enjoyable.
Many keyboardists love the PHA-50 action and I’m also a fan. While it leans towards being lighter than I prefer, it still feels great and
versatile, covering just about any kind of sound you can imagine.
HYBRID GRAND KEYBOARD
This is a variation on the previously discussed PHA-50, featured exclusively on the
LX700 series digital pianos.
The main differences are
longer keys and, as a result, longer key pivot lengths. This reduces fatigue and makes playing the keys a lot more enjoyable across extended periods of time.
The Hybrid Grand action also incorporates a stabilizing pin, making vertical key movement smoother and quieter.
In terms of actual feel, I’d say the Hybrid Grand action feels close to the real deal, having the heft and depth you’d expect from a real grand piano (which is what the LX700 series is trying to recreate).