Using a Casio CDP-S350 Compact Digital Piano as an 88-key controllerThe Roland RD-700GX or the RD-2000 88-key Stage Pianos are ideal to pair up with a Yamaha GENOS to get you that progressive hammer action keybed.
The Roland RD-2000 features their absolute top of the line PHA-50 progressive hammer action keybed which feels luxurious to the touch. But this instrument costs $2,680 and weights a hefty 47 lbs.
Are there cheaper portable options?I decided to try out the Casio CDP-S350 compact digital piano. B&H shipped via 1-day FedEx delivery.
Casio CDP-S350The 88 keys on a piano span exactly 4 feet. You cannot do much to shorten the length. What Casio did was drastically reduce the depth of this device to 9.1β while keeping the height at 3.8β.
This makes the CDP-S350 the worlds slimmest 88-key graded hammer action keyboard.
They did not compromise on the length of the keys. The white and black keys measure the standard 5.75β and 3.75β in length respectively.
Weighing in at less than 24 lbs, this is the most portable 88-key digital piano with weighted keys you can buy today.
It comes with 700 presets, 64 voice polyphony and surprisingly features arranger functions with 200 styles.
Casio CDP-S350 SpecificationsAt an MSRP of $549, the CDP-S350 is the cheapest 88-key fully weighted arranger keyboard.
This device is ideal for the beginner who wants to take piano lessons and dab into some arranger features for fun. It is no wonder why this model has become so popular. Casio smashed the price/performance ratio and sent their competitors back to the drawing board.
I would say the CDP-S350 was the reason Yamaha had to reimagine their DGX line and come up with their new
DGX-670 model to stay in competition.
What did Casio sacrifice to shrink the depth of this device to 9.1β?Answer:
The playability of the black keys.The weight of the black keys feel perfectly balanced with the white keys when you press down on the black keys in the middle. This is good.
However, when you press down on the tip of the black keys, they feel considerably lighter than the tip of the white keys.
Conversely, it feels very difficult to push down the black keys when you place your fingers on the back of the black keys.
Why is that?
The keys act like a lever. The back of the black keys are very close to the fulcrum requiring you to apply a great deal of pressure. The fulcrum could not be placed further back because of the design constraint on the depth.
If you look at all other digital pianos from every other vendor featuring fully weighted keys, you will notice the depth is 10β or more.
Roland FP-10, depth = 10.19 inches
Yamaha P45, depth = 11.5 inches
Kawai ES110, depth = 11.33 inches.
Korg B2, depth = 13.23 inches.
Ideally, there should be very little variation no matter where you push down on a black key. This is achieved by making the keys longer which in turn dictates a greater depth.
You cannot cheat physics.
James Pavel Shawcross, a classically trained pianist brought up this issue on his review of the
Casio PX-S3000.
He pointed out that the black keys feel lighter than the white keys on the PX-S3000.
It is an undisputable fact.
However, this is where things got interesting.
Casio responded to James' review.
Mike Martin, general manager of Casio hinted that certain design compromises had to be made. Rich Formidoni on the other hand came out vigorously defending the PX-S3000 design and made matters worse. Rich previously worked at Korg.
James is a passionate guy. In response to Rich he actually took apart his Casio PX-S3000 to study the
keyboard mechanism.
He showed the back keys indeed had lighter counter weights compared to the white keys proving his hypothesis.
Rich could have handled this situation a lot better by being more diplomatic. Yes, certain sacrifices had to be made to strike the best balance between playability, features, portability and price.
Rich missed a golden opportunity to educate the public on their state of the art keyboard action featured on their
GP510 Hybrid Grand Piano.
The keyboard mechanism is designed by Carl Bechstein, makers of one of the finest concert grands.
The GP510 retails for
$6,000.You can hear Kateryna Titova perform on the
Casio Grand Hybrid GP-500.Aside from the black keys on the Casio CDP-S350, how does the keyboard action feel?It is distinctly different than the GH3 action on the Yamaha P45 and the PHA-4 action on the Roland FP-30X.
The white keys on the CDP-S350 feel more bouncier. They spring back faster. I like the action. The Roland PHA-4 action feels sluggish in comparison. The Yamaha GH3 action feels damped compared to the Casio action.
The Casio CDP-S350 is perfect for practicing on the C Major Scale. One can always transpose down to C to minimize playing on the black keys. If you are accustomed to playing on a Roland RD-700GX, you will immediately notice the unevenness of the black keys on the Casio.
Due to the slim design, the shoulder on the CDP-S350 is very narrow. It measures 2.5 inches. I would have liked the shoulder to be 4 inches wide. This would have allowed me to place a compact QWERTY keyboard or a controller on top. I could have made good use of this real estate.
In my opinion, increasing the depth from 9.1 inches to 10.5 inches would have led to a better overall design. It would have instantly fixed the issue with the black keys while providing users enough shoulder width to place keyboards and controllers on top.
What about the sounds on the Casio CDP-S350?The best piano voice is the very first one named Stage Piano. It is not as good as the Yamaha P45 or the Roland FP-30X.
However, the CDP-S350 has plenty of other good sounds in other categories.
I would rate the CDP-S350 as 8/10.
If the depth was 10.5β and came with a Piano voice on par with the Yamaha P45, I would have given this a perfect rating of 10/10 at this price point considering all the extra features and portability it brings to the table.