NAD 6130 - Manual (Page 2)

HIGH HEADROOM FOR PEAKS
The 6130 is equipped with a hard permalloy record/play head. Permalloy has long been recognised as an
ideal material for recording heads, because it has lower distortion at high signal levels than most other
head materials. With this head you can take advantage of the greater dynamic range of today’s high-
performance tapes to capture dynamic musical peaks with maximum clarity and power.
The ability of the permalloy head to handle high signal levels without saturating is especially important
with high-bias (chrome) and metal-particle tape formulations. These tapes excel in high-frequency
dynamic range, allowing you to capture the full brilliance and power of cymbals, bells, brass, and
synthesisers in clear, airy sound.
DOLBY B NR FOR COMPATIBILITY
The NAD 6130 contains a correctly calibrated Dolby B-type noise-reduction circuit for optimum
compatibility with prerecorded music cassettes throughout the world. Dolby B-type NR can also be used
when recording tapes for friends or for playback in a portable or auto tape player.
RELIABLE LOW-FLUTTER TAPE TRANSPORT
In a budget-priced tape deck, one of the greatest challenges is to obtain-consistently low flutter from
beginning to end of every tape, Even a modest amount of flutter, too slight to be separately audible as a
wobbling of the musical pitch, can cause a loss of clarity-making a recorded tape seem unsteady and
fatiguing to listen to. The tape transport in the NAD 6130 is an economical design whose apparent
simplicity of construction belies its excellent reliability. It employs a quiet, smooth-running DC motor
whose torque, as in a fine turntable, is transferred to the capstan spindle via a rubber belt and a
balanced flywheel to smooth out any irregularities, reducing the flutter to well below the threshold of
audibility.
INSTANT-RELEASE PAUSE CONTROL
Ideally, a Pause control should provide a precise interruption in recording or playback-but many Pause
controls are anything but precise, with an audible delay in their response. In the 6130 the Pause control
provides a virtually instantaneous resumption of recording or playback, providing clean edits and
allowing you to make recordings that start exactly when you want them to.
PEAK READING LED METERS
Fast, accurate metering is not a frill in a tape recorder; it is an essential aid to making good recordings.
When taping dynamic music it is important not to allow the transient peaks in the music to saturate the
tape; but if the recording level is set too conservatively, the signal to noise ratio may be poor. Therefore
the NAD 6130 has a simple but fast-acting LED display that registers even brief peaks in the sound, with
a highly visible change from green to amber to red when the signal level approaches the saturation level
of the tape. Even inexperienced recordists will find it easy to make first-rate recordings on the 6130,
simply by adjusting the recording level control so that the red LEDs flash on and off during the peaks.
THE BENEFITS OF DOLBY C NR: A CLOSER LOOK
The accompanying graph illustrates the dramatic quieting of tape hiss that the Dolby C NR system
provides. The top curve is a measurement of the background noise of a blank cassette tape, “A-
weighted” to reflect the way the ear responds to low-level sounds. Without the Dolby NR system
operating, the noise consists mainly of high-frequency hiss and is rather obtrusive.
The middle curve shows that the standard Dolby B-type noise reduction circuit reduces the tape hiss by
about 10 decibels at the mid-treble frequencies where the ear is most sensitive. The bottom curve
demonstrates the dramatic quieting provided by Dolby C NR: a full 20 dB of noise reduction over a
broad range of frequencies. When you listen to the 6130 your ears will confirm what the graph shows:
tape hiss is no longer an important problem in cassette recording.
The second advantage of Dolby C NR is its improved resistance to tape saturation at high frequencies (a
major cause of dull sound in cassette recordings). Dolby C NR includes complementary circuits that
reduce the strength of loud high-frequency signals during recording and then restore them precisely to
their original strength in playback. Even if you over-record and some high-frequency saturation does
occur, the Dolby C NR circuits are “desensitised” above 10 kHz so that mild high-frequency losses in the
recording will not cause mistracking in playback.
The result, in simple language, is that the NAD 6130 with Dolby C NR accurately preserves the tonal
balance of musical sounds over a very wide entire dynamic range. You can record music at high levels
without its brilliance being dulled by tape saturation, and you can record music at low levels without its
inner detail being veiled by an audible layer of tape hiss. The 6130 captures the tonal richness of every
musical sound, naturally and accurately.