This is the greatest professional recording system still today. Computer programs (DAW's) like Garage Band and pro tools has two main problemsthey sound compressed; and they freeze (You loose your work).  I've used this machine since 2001recording on hold phone messages for big companies. I have also used it to record 5 and even 7 piece bands. It is a work horse. I am selling this because I am retiring.The machine is in beautiful condition and everything works as it should. There are a few minor scuffs you can see in pictures.Parts and upgrades are still available through Yamaha and other sites. Read below the upgrades I've already done The only thing I wouldsuggest is power monitors.AW1644 digital dream studio in one totally integrated totally professional unit. With the Yamaha AW4416 Professional Audio Workstation you can record, edit, mix, and master to CD without needing any external equipment other than your microphones and/or line sources and a monitor system (headphones will do in a pinch). Of course, you can easily expand the AW4416 to meet even the grandest production requirements with a range of optional I/O interface cards that provide direct connectivity with all types of digital and analog gear. And, whether you choose to record in 16-bit or 24-bit format, the sound quality you'll achieve is on a par with the finest professional digital recording gear available anywhere. In terms of sound quality, features, operation, and seamless integration, the Yamaha AW4416 Professional Audio Workstation is simply the only choice if you're serious about your recordings. Add-ons  includes Waves Y56K Plugin Card.The Waves Y56K is an expansion card for Yamaha's AW4416 and AW2816 all-in-one recorders. It provides powerful DSP processing via Waves's famous plug-ins, and includes the True Verb reverb, L1 Ultramaximizer, the Renaissance Equalizer and Compressor, the Super Tap delay, and the Waves De-Esser. The Y56K also provides A DAT optical I/O jacks for 8 channels of 24-bit digital transfer. Also the Yamaha MY4-AD was added. It is a 4-Channel Analog Input CardMini-YGDAI cards make it easy to add I/O in a wide variety of audio and network formats to Yamaha digital mixing consoles, processors, and power amps that are equipped with compatible card slots. Mini-YGDAI cards can give your system the most up-to-date capabilities for any application.A 40 gig hard drive was installed. Upgrades alone are more then I'm asking
GeneralInternal Processing
32bit Sampling Frequency
44.1kHz, 48kHz Frequency Response
20 Hz - 20kHz (0+1 / -3dB, Omni Out) Total Harmonic Distortion
Less than 0.02% (@ 1kHz, Omni Out) Dynamic Range
104dB (typical) Phantom Voltage
+48V AD Converter
Rate 24-bit, 64 x oversampling DA Converter
Rate 24-bit, 128 x oversampling MIDI
MTC, MMC, MIDI Program Change, MIDI Clock Memory
Scene memory: 96 per song
 Patch Library
 Channnel Library
 EQ Library
 Dynamic Library
 Effect Library
 Automix Fader
17 x 60mm ( Motor Drive) Display
320 x 240 dot backlit LCD, 3-color FL display Power Requirements
120 V (UL, CSA) , 230 V (CE) DimensionsWidth
558mm (22") Height
148mm (5-7/8") Dimensions
460mm(18-1/4") Net Weight
11.8kg( 26 lbs.) MixerCard Slot
2x Mini-YGDAI Mixer Input Section
Selected Inputs via Patch Bay: 24
 HD Recorder Playback: 16 (stereo x 1 for CD playback)
 Internal Effects Return: 4 (stereo x 2) Internal Effect Section
2 Master Section
Group: 8
 Aux: 8
 Stereo: 1
 Solo (stereo): 1 RecorderRecording Resolution
16-bit, 24-bit  Sampling Frequency
44.1kHz, 48kHz Maximum Number of Songs
30,000 Songs Maximum Number of Simultaneous Recording / Playback Tracks
16-bit mode 8 / 16, 24-bit mode 8 / 16, All Rec mode 16 Number of Tracks
16 HDD
2.5"
 Max 64GB
 12GB 2.5" Hard Disk Drive (DARA-212000) Edit Functions
SONG, TRACK, PART, REGION Other Functions
Quick Locate: 8 points (SONG TOP, RTZ, SONG END, A, B, LAST REC IN, LAST REC OUT, ROLL BACK)
 Mark: 99
 Time Compression/ Expansion CD-RW DRIVE
Compatible drive unit YAMAHA CRW8824S, etc.
 Function Playback Audio CD, make Audio CD
 Save backup HDD data/Load backup data from CD-ROM to HDD
 Read CD-ROM Communication with External DevicesMIDI IN
DIN 5pin MIDI OUT / THRU
DIN 5pin Analog Input CharacteristicsInput Terminals
MIC/LINE INPUT 1, 2
 CH 1,2 INSERT IN
 MIC/LINE INPUT 3~8
 CH8 Input Hi-Z / CH8 For Use With Nominal
-52dB
 -
 -52dB
 -52dB Input Level (Nominal)
+4dB (Line) ~ -46dB (Mic)
 0dB
 +4dB (Line) ~ -46dB (Mic)
 +4dB (Line) ~ -46dB (Mic) Input Level (Max before clip)
3k ohms / +22dB
 10k ohms (600k) / -
 3k ohms / +22dB
 500k ohms / +20dB Connector
XLR / TRS phone (Balanced), Phantom
 TRS Phone (Unbalanced)
 TRS Phone (Balanced)
 Phone (Unbalanced) Analog Output CharacteristicsOutput Terminals
STEREO OUT
 MONITOR OUT (L,R)
 OMNI OUT 1~4
 PHONES Output Level (Nominal)
-10dBV
 +4dB
 0dB
 100mW+100mW Output Level (Max before clip)
1k ohms / +8dBV
 150 ohms / +22dB
 1k ohms / +18dB
 - / 100mW+100mW (40 load) Connector
Phono
 TRS Phone (Balanced)
 Phone (Unbalanced)
 Stereo Phone (Unbalanced) Digital Input CharacteristicsTerminal
OPTION I/O SLOT 1,2
 DIGITAL STEREO IN / OUT
 WORD CLOCK IN / OUT
 MIDI IN,OUT / THRU, MTC OUT
 TO HOST
 SCSI
 MOUSE Format
Mini-YGDAI
 IEC958 Consumer Use / Professional
 TTL /75 ohms
 -
 -
 -
 - Connector
Mini-YGDAI
 Phono
 BNC
 DIN 5pin
 Mini DIN8pin
 D-sub 50pin
 D-sub 9pin