Harman Kardon's state-ot-the mind technology is exemplified in the CD391. its frequency response is an almost unheard of 20 Hz to 22 kHz (±3 dB), with any tape formulation.
The CD391 also offers the advantages of Dolby HX Professional, which delivers greatly enhanced frequency response at high record levels, with significantly reduced distortion. Added to this is a Signal-to-Noise Ratio with Dolby HX Pro, the CD391 provides a high level (0 dB) Frequency Response of 20 Hz to 20 kHz (±3 dB). The dramatic result of this is the ability to accurately record more dynamic audio signals than was previously possible. This is especially significant as more demanding forms of software, such as digital audio emerge.
To indicate the optimum record level, the CD391 has a unique mater weighting feature which measures the frequency content of the music and is backed by a 16-segment peak level meter ranging from -30 dB to +10 dB.
The CD391 also offers a highly precise closed-loop, dual capstan, dual flywheel transport and a third motor to gently raise and lower the head assembly. It also has bi-directional auto-search: peak hold, independent left and right level controls; and master fader.
Special Harman Kardon features found on the CD391 also include tone generators for bias trim and record calibration that allow alignment of bias and Dolby levels with virtually any tape. Sendust record/playback head, Mic/Line mixing, solenoid operation, timer controllable functioning, record, mute and auto space are all featured on the CD391
Specifications
Tape Speed: 1-7/8 (ips)
Heads: 2
Record/Playback Head Type: Sendust
Frequency Response (-20 dB, IHF std)
All Tape Formulations: 20 Hz - 22 kHz ±3 dB
Metal Tape : 20 Hz - 22 kHz ±3 dB
Large Signal Response (0 dB, with Dolby On, Metal Tape): 20 Hz - 20 kzh ±3 dB
Wow and Flutter
NAB, WRMS : 0,025%
DIN : 0,04%
Signal-to-Noise Ratio (CrO₂)
Dolby NR, Off : 58 dB
Dolby B, On : 66 dB
Dolby C, On : 74 dB
Total Harmonic Distortion (1 kHz, Metal tape, Dolby Level): 0,9%
Channel Separation: 45 dB
Channel Crosstalk: 70 dB
Erase Ratio: 65 dB
Bias Frequency: 106 kHz
Fast Forward and Rewind Time: 90 sec. C-60 cassette
Peak Reading meter Range: -30 dB to +10 dB
Output Level, ) dB, 10 k Ω load: 420 Mv (max)
Output Impedance: <5 k Ω
Input Sensitivity (0 dB)
Mic : 0,65 mV
Line : 40 mV
Input Impedance
Mic : 1,0 k Ω
Line : 22 k Ω
Headphone Impedance (Minimum): 8 Ω
Dimensions (W x H x D):440 x 122 x 343 mm (17-5/16" x 4-13/16" x 13-1/2")
Weight: 8,0 kg (17,6 lbs)
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