Amplifier with DSP processor Nakamichi NDSE500A

Name: Amplifier with DSP processor Nakamichi NDSE500A
Brand: Nakamichi
Price: 391.60 EUR
Availability: InStock

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4-channel amplifier with DSP processor, 4 × 100 W RMS, Class AB, 8× RCA outputs, 31-band EQ, Bluetooth, USB
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Amplifier with DSP processor Nakamichi NDSE500A

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Amplifier with DSP processor Nakamichi NDSE500A

The Nakamichi NDSE500A is an eight-channel digital audio processor with an integrated four-channel Class AB amplifier that combines high power, extensive tuning options and flexible audio system wiring. The built-in amplifier delivers a nominal power of 4 × 100 W RMS at 4 Ω, a peak power of 4 × 125 W and, in bridged mode, up to 2 × 230 W. This enables powering even more demanding component speakers or a subwoofer. The amplifier is intended for speakers with 4 Ω impedance and does not support 2 Ω loads.

For connection to a car radio, the NDSE500A offers four high-level and two low-level RCA inputs. Eight low-level RCA outputs allow the unit to be used as a standalone DSP processor in conjunction with external amplifiers. Built-in and external amplifiers can be combined as needed—for example, using the integrated amplifier to power front component speakers and connecting a separate amplifier for rear speakers or a subwoofer via RCA outputs.

The DSP provides independent tuning of all eight output channels. Available are a 31-band equalizer, active crossovers, time corrections, polarity setting, output level and input signal mixing. High-pass and low-pass filters can be set in the range 20 Hz to 20 kHz with slopes up to 48 dB/oct. and selection of Butterworth, Bessel or Linkwitz-Riley filters. Combining HPF and LPF also enables band-pass filtering. Time corrections offer ranges up to 25 ms or 850 cm with a precision of 0.01 ms. Six separate sound presets can be stored in memory.

The NDSE500A supports Bluetooth 5.3 for wireless music playback and playback of lossless files from USB storage with capacity up to 256 GB. Settings can be adjusted via PC software or the Nakamichi-E mobile app. Support is also provided for the optional Nakamichi AC6 controller with a 2" LCD, volume control and track display. Automatic power-on can be controlled by the high-level input signal or the ACC wire, and a startup delay of up to 10 seconds can be configured.

Main features

8-channel digital audio processor.
Integrated 4-channel Class AB amplifier.
Nominal power 4 × 100 W RMS at 4 Ω.
Peak power 4 × 125 W at 4 Ω.
Bridged power 2 × 230 W at 4 Ω.
Support for speakers with 4 Ω impedance.
Amplifier not intended for 2 Ω loads.
Four high-level inputs.
Two low-level RCA inputs.
Four amplified high-level outputs.
Eight low-level RCA outputs.
Can be used as a standalone DSP processor.
Ability to combine built-in and external amplifiers.
31-band equalizer for all eight output channels.
EQ adjustment range from −12 to +12 dB.
Adjustable Q value in the range 0.3 to 50.
High-pass and low-pass for each output channel.
Ability to create a band-pass filter by combining HPF and LPF.
Butterworth, Bessel and Linkwitz-Riley filters.
Adjustable filter slopes from 6 to 48 dB/oct.
Adjustable crossover frequencies from 20 Hz to 20 kHz.
Time corrections up to 25 ms or 850 cm.
Time correction precision 0.01 ms or 0.34 cm.
Independent polarity setting for each channel.
Output level adjustment from −60 to +6 dB.
Ability to save six sound presets.
Built-in Bluetooth 5.3.
Wireless music playback via Bluetooth.
Playback from USB storage.
Support for USB storage up to 256 GB.
Support for FAT32, NTFS and exFAT file systems.
Support for MP2, MP3, WMA, APE, FLAC, AAC, MP4, M4A, WAV, AIF and AIFC formats.
Configuration via PC software.
Control via the Nakamichi-E mobile app.
Support for optional Nakamichi AC6 controller with 2" LCD.
Automatic power-on via high-level signal or ACC.
Adjustable power-on delay from 0 to 10 seconds.
REM output for switching external amplifiers.

About the brand

The history of the Nakamichi brand dates back to 1948, when it was founded in Japan by Etsuro Nakamichi. His journey began with the establishment of the Nakamichi Research Corporation in Tokyo, focused on research of sonars, magnets and development solutions for leading brands, government institutions and universities. From the beginning, the brand was built on a scientific approach, deep understanding of sound and emphasis on technical precision. A major expansion period came in 1972, when Takeshi Nakamichi joined the company and significantly contributed to the development of legendary audio products sold worldwide. Under his leadership, models such as the Nakamichi 1000—the world’s first cassette deck—were developed. Thanks to the combination of top-tier sound and timeless design, to which chief engineer Kozo Kobayashi also contributed, Nakamichi products became icons of their era. The Nakamichi brand remains successful today, offering a portfolio of high-quality products for home and car audio that stand out for thoughtful construction, quality workmanship and excellent sound within their price category.

Catalog number	NDSE500A
Brand	Nakamichi
Links	Official web presentation
Energy class of the amplifierAmplifiers are divided into two basic classes: analog and digital . Analog amplifiers (A/B) have higher consumption requirements, but usually have a more natural sound. Digital amplifiers (D) have significantly lower consumption and higher efficiency, but the sound may not be as faithful as with classic analog amplifiers.	AB
Number of amplifier channelsAmplifiers are divided into: - Monoblocks - 2-channel - 3-channel - 4-channel - 5-channel - 6-channel - multi-channel Each channel is used to power one speaker for the coaxial type, or one side if they are component speakers. Monoblock type amplifiers are mainly used for subwoofers. 2-channel are suitable for both subwoofers and, for example, the front pair of speakers in a car. 3-channel is used for front or rear speakers + subwoofer. 4-channel are used for front + rear speakers or 1 pair of speakers + subwoofer. 6 or 5-channel are used for 2 pairs of speakers + subwoofer, most often. Bridging means connecting the amplifier to a bridge, using the + pole from one channel and the - pole from the other channel. In most cases this is shown as "BRIDGED" on the amplifier.	4
RMS power into 4 ΩRMS power when loading speakers or subwoofer at 4 Ω. RMS power is the constant power of the amplifier and is one of the most important parameters when choosing an amplifier.	4 x 100 W
Frequency rangeThe ability of the amplifier to reproduce the signal from the lowest frequency to the highest = faithfully reproduce the sound in a specific frequency band. Professionally: In the frequency range from 40 to 16,000 Hz, the vast majority of fundamental and overtones (harmonics) of all musical instruments are found. We are interested in the course of the radiated sound pressure in this range of frequencies when the loudspeaker system is supplied with constant power. We call this course the frequency characteristic, which tells us the level of radiated sound pressure in decibels (dB) depending on the frequency. The frequency characteristic of a speaker or speaker system can be expressed most succinctly with a graph. Mostly, however, the frequency characteristic is indicated by indicating the maximum tolerance of the sound pressure in the given frequency range, e.g. 50 to 15,000 Hz -+ 6 dB. Since the frequency characteristics of loudspeakers and systems in general are quite uneven, some manufacturers do not even specify this maximum tolerance of sound pressure in decibels in their catalogs for reasons of prestige. Data impoverished in this way is unfortunately worthless. What is valid is that the manufacturer offers a speaker system with a frequency range of 30 to 20,000 Hz, if he is worried about stating the maximum unevenness of the sound pressure in this range, because he can have a tolerance of, for example, +- 20 dB. The unevenness or undulation of the frequency curve in good speaker systems for high-quality music performance should not exceed +-3 dB in the 80 to 12,000 Hz band and +-6 dB in the 40 to 16,000 Hz band. Greater unevenness already depletes or emphasizes certain tonal areas, which can cause audible or even disturbing distortion. The proportion between fundamental tones and higher harmonics also changes, thereby changing the color of the sound, and individual musical instruments as well as the entire musical image sound unnatural.	20 - 20000 Hz
Harmonic Distortion (THD)Total harmonic distortion indicates how much the input signal is distorted in the amplifier. Distortions appear as overtones contained in the output signal. The proportion of originally absent parts of the signal is given as a percentage, typical values are between 0.001% and 0.5%. Distortion is measured in their power band. If it exceeds the limit of 0.7% from a certain power, it is the value of the output power of the given amplifier, from which it no longer plays without distortion and from which the distortion usually increases steeply, so that no further increase in power can be counted on. The lower the value, the better.	< 0.05 %
Signal-to-noise ratioThe signal-to-noise ratio means that the output signal always contains noise. The signal-to-noise ratio expresses how much of this noise is compared to the useful signal. The so-called A value is given, which does not take deep and very high frequencies into account. This corresponds to the characteristic of human hearing, which is not so sensitive to deep frequencies, especially below 1 kHz. The higher the value, the better the amplifier is.	> 98 dB
Inputs	2 x RCA, 4 x high-level
Outputs	8 x RCA
Standby power consumption	< 0.005 A
On-board voltage rangeThe ability of the amplifier to operate at a specified voltage. As the voltage decreases, so does the power of the amplifier. The ideal voltage in a car is between 13.8 and 14.4 V.	9 – 16 V
High level inputsThe high-level input on the amplifier allows connection directly to the existing speakers in the car without additional purchase of an external high/low adapter. Important equipment in the case of installing an amplifier on an original car radio.	Yes
Automatic on and offThis function allows you to automatically switch on the amplifier.	Yes
Integrated DSP processor	Yes
Number of DSP processor channels	8
Output equalizer	31 bands
Filters	HPF, LPF
Filter types and slope	Butterworth, Bessel and Linkwitz-Riley (from 6 to 48 dB/oct)
Input for wired remote controlIf the amplifier has a remote control input.	Yes
Dimensions of the amplifier	213 × 219 × 49 mm
Mass	2.5 Kg