Alesis ADAT HD24 Digital Recorder Review

Average Reviews:

(More customer reviews)This recorder has everything I wanted when I did research and purchased it. Moreover, it is well built and does everything I originally expected it to do very well. All I wanted was a multitrack recorder that I could interface with the existing recording/PA equipment I already had. I was using a 2-track digital recorder and soon realized the editing limitations of having only 2-tracks (although I also appreciate the simplicity of it). The Alesis seemed to fit the bill. All my editing is done on a computer, so having these functions on a recorder is superfluous -- the Alesis does not have much editing capability. This recorder only has ADAT and phone outputs, so monitoring back into my analogue mixer is a challenge (need to patch all channels). There are probably more sophisticated multitrack digital recorders out there that may do more, so check carefully if the Alesis is all you need.

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The Alesis ADAT HD24 24-track hard disk recorder is designed to fit into any ADAT environment and match ADAT's performance and affordability. It packs 24 channels of digital audio I/O into a single-unit recorder that easily fits into any environment. Built exclusively for the purpose of recording music instead of data, the HD24 provides remarkable stability and performance while recording up to 24 tracks of high-resolution 24-bit recording at 44.1 and 48 kHz sample rates.
Two hot-swappable media bays provide convenient access to recording drives and allow data backup in minutes. You can edit tracks internally or easily transfer to computer via an Ethernet connection. And the HD24 features both the user-friendly ADAT Optical and ADAT Sync interfaces, enabling it to work efficiently with existing systems.
The HD24 can be upgraded to HR24XR with the user-installable EC2 module option, which replaces the A/D and D/A converters with AKM converters used in the MasterLink. EC2 improves performance at all sample rates and also expands analog and digital-input compatibility to include 88.2 and 96 kHz sample resolutions.
Key Features
24-track, 24-bit digital audio recording (12 tracks at 96kHz with EC2 optional upgrade)
24 analog inputs (1/4-inch TRS)
24 analog outputs (1/4-inch TRS)
24-channel ADAT Optical I/O
Dual recording bays utilize standard, low-cost, removable IDE computer drives
Instant random access to audio using ADAT/FST (File Streaming Technology).
Internal editing capabilities include cut, copy, paste, and track-move with undo.
Multiple units can be synchronized to create a larger system
Easily integrated into an existing ADAT system
Ethernet port enables computer connection
MIDI I/O, MTC out
ADAT Sync in/out
Word Clock in

SpecificationsMedia
Caddy 1: 40 GB HD
Caddy 2: empty
Caddies can be fitted with IDE/EIDE/ATA drive at 5,400/7,200/10,000 RPM up to 2 TB

Track Count
24 tracks at 24-bit, 44.1 or 48
12 tracks at 88.2 or 96 kHz with optional EC2 upgrade

Connections
Analog: 24 24-bit inputs, 24 24-bit outputs (1/4-inch TRS, +4dBu)
Digital: 24-channel I/O via 3 ADAT Optical inputs and 3 ADAT Optical outputs
Other: MIDI in/out. Alesis Sync in/out (DB-9). Word Clock input (BNC, 75). Footswitch jack for punch in/out (1/4-inch). LRC input for traditional wired remote (1/4-inch). 10 Base-T Ethernet (RJ-45)

Audio Specs
Frequency response: 20Hz-20kHz +0/-1dB
Dynamic range: 103dB A/D, >103dB D/A (A-weighted)
Distortion: less than 0.003% THD+N. Input levels: nominal +4dBu, maximum +19dBu
Pitch control: +100 cents/-200 cents, min-max 30-50kHz (30-100kHz with version 2.0)

Power & Dimensions
Power: 90-230V AC, 60W
Dimensions: 5.09 x 19 x 17 (HxWxD), 3U rackmount
Weight: 20 pounds

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