Kurzweil KS-40a Compact Self-Powered Monitors, 2019, made in China

Link: kurzweil

SPECS
Cabinet: 100% wood cabinet using 12mm non-resonant MDF
HF Driver: 3/4 inch (19mm) dome type, magnetically shielded
LF Driver: 4 inch (106mm) diameter, magnetically shielded
Bass Reflex Port: rear panel
Power Output: 10Wrms x2 (at 1KHz, 10% THD)
Frequency Response: 100-10,000Hz (at -5dB)
Controls: 1x Volume, 1x Sub Bass
Input Ports: 2 pairs of stereo RCA jacks, internally mixed
(Line A inputs feature treble boost of 9dB at 10KHz; Line B inputs are flat)
Input Impedance: 20K Ohms
Height: (9-1/16″) (23.00 cm)
Width: (5-7/8″) (14.80 cm)
Depth: (7-1/16″) (18.00 cm)
Weight: (11.00 lb.) (5 kg), both cabinets

Kurzweil RE-220 Digital Piano, 2006, made in ...

Link: kurzweil | Owner's Manual | muzoborudovanie

How can I restore my RE210/RE220 to its factory defaults?

Answer:

1. press MIDI/Pref button
2. press Percussion - you will see "Y ?"
3. press Up button to invoke

The unit is now reset.

Keyboard:	88-Note weighted, 4-zone graded hammer
Keyboard Sensitivity:	7 levels of adjustment
Display:	3-digit, 7 segment LED
Sounds:	37
Polyphony:	32-Voice
Multi-timbral Parts:	16
Sound Layering:	yes (with layer volume balance)
Split Keyboard:	yes (customizable split)
Transpose:	+/- 12 semitones
Tuning:	+/- 100 cents
Intonation Tables:	6 (Equal, Classic Just, Just flat7th, Pythagorean, Mean Tone, Werkmeister)
Reverb/Effects:	Room, Hall, Stage Reverbs, Chorus and Flange effects
EQ:	Bass & Treble Tone controls
Recorder:	2 Songs, 2-Track (with metronome & tap tempo)
Pedals:	3 Dynamically Switched
MIDI:	In/Out
Amplification:	60 Watts (2x30 W RMS per channel)
Speakers:	4 total (2- 2" tweeters & 2- 6.5" woofers)
Headphone Outputs:	2 (1/4" stereo)
Aux Line In:	1 (1/4" TRS/stereo)
Aux Line Out:	1 (1/4" TRS/stereo)
Cabinet Finish:	Simulated Rosewood
Height:	35" / 89 cm
Depth:	19.7" / 50 cm
Length:	54.3" / 138 cm
Weight:	125 lb. / 57 Kg
Power:	Free Voltage Power Supply 100-240VAC (+/- 10%) 25W nominal, 100W max