NAD 613 User Manual

613

Cassette Deck

• Dolby HX Pro circuitry improves high frequency response.

• Play Trim for play-back compatibility with virtually any tape.

• Bias control for high performance with a large range of tapes.

• Dolby B & C Noise Reduction circuits.

• Electronic tape counter.

• Automatic Peak Hold facility on Record level meters.

• Repeat and Block Repeat facility.

• Headphone jack.

• NAD-Link for remote control capability.

Sonic performance is always the first priority at NAD and the deceptively simple no-frills Model 613 is no
exception. The NAD Model 613 may be the only cassette deck in its price range to faithfully reproduce a
wide-range CD without dulling its impact.

Features and Circuitry

Rather than incorporating features such as Search facilities, etc. which can degrade the overall sound
quality and reliability, the NAD Model 613 offers features which are specifically tailored towards the most
common uses for a cassette deck; making high quality recordings and play-back of pre-recorded tapes.

With almost any other deck the results of playing back a pre-recorded tape or tape recorded on a
different machine are disappointing, particularly if the tape has been recorded with Dolby NR. The causes
for poor playback are multiple; differences in head alignment, wrong bias level; aging of the tape, etc.
As a result the noise reducing circuits (Dolby B & C) "mistrack", resulting in dull, un-engaging sound.
The Play Trim control provides adjustable boost or cut of the high frequencies before the Dolby Noise
Reduction circuits thus eliminating high frequency roll-off and mistracking and thereby restoring flat
frequency response and superb playback fidelity.

Other features include the Bias controls which lets you trim the recording bias for accurate response
with every type and brand of tape; a digital tape counter with its four digits allows you to find passages
on the cassette with great accuracy. The headphone jack lets you monitor play-back or recording,
independent from the rest of the system. The entire side of a cassette can be repeated up to five times,
the Repeat facility even offers the possibility to repeat a pre-marked section of the cassette, again up to
five times.

Thanks to NAD-Link the Model 613 can be remote controlled by one of NAD's universal remote controls
which come supplied with other NAD equipment which sports NAD-Link.

The no-compromise electronics - quieter than any tape can be - incorporate Dolby HX Pro circuitry,
which together with accurate alignment and high quality heads, improves high frequency response at
high recording levels and avoids tape saturation. In combination with the excellent transport the NAD
Model 613 offers sophisticated circuitry and technology behind a modest facia, capable of making
superb recordings.

SPECIFICATIONS - NAD Model 613

Speed Accuracy ± 1%
Wow and Flutter <0.06% JIS wtd. RMS

<0.1% DIN wtd. peak
Frequency response (Dolby NR off, Record/Playback) 35Hz - 17kHz ±3dB
MPX filter response Flat within 1dB to 15kHz
Harmonic distortion Varies with recording level;

typically <0.3% at -10dB
THD @ 0dB (Normal tape) <1.0%
THD @ 0dB (CrO2, Metal tape) <1.5%
Signal-to-Noise ratio 58dB (Dolby off)

(Ref. 3% THD at 333Hz [biased tape] CCIR/ARM weighting) 68dB (Dolby B)

78dB (Dolby C)
Channel separation 40dB @ 1kHz

35dB broadband
Erase >70dB @ 1kHz
Input sensitivity / impedance 40mV/50k
Maximum input level 25V
Output level @ 0dB 500mV

PHYSICAL SPECIFICATIONS

Dimensions (W x H x D) 435 x 125 x 290mm
Net weight 5.0kg
Shipping weight 6.6kg

Dolby NR and HX Pro are registered trademarks of Dolby Licensing Corporation.
NOTE: NAD resrves the right to change specifications or design at any time without notice. All specifications sre those in effect at time of printing.