Kenwood DPX-6100МD

The Kenwood DPX-6100MD is a double-DIN receiver with MiniDisc and CD transports and an FM/AM tuner. The manual carries publication number B64-1719-20. Note that the archive handle for this entry reads DPX-6100; the model designation is DPX-6100MD.

Both transports use a GaAlAs double-hetero laser diode at 780 nm with an eight times oversampling digital filter and a 1-bit digital-to-analogue converter. The MiniDisc mechanism runs at 400 -> 900 rpm under constant linear velocity and the CD mechanism at 200 -> 500 rpm. Wow and flutter on both is quoted as below measurable limits.

The MiniDisc section is quoted at 0.005 percent distortion at 1 kHz against 0.01 percent for the CD section. The CD section returns the higher signal-to-noise and dynamic range, both at 93 dB, against 90 dB for the MiniDisc section. Stereo separation is 85 dB on both.

The DSP and equaliser section uses third-order delta-sigma converters in both directions at 18-bit resolution with 128 times oversampling. This is the only 18-bit converter section recorded in this archive; the comparable Kenwood units use either 20-bit third-order converters or the fourth-order Enhanced Dual Bit arrangement. The equaliser provides nine bands centred at 60, 160, 400 Hz and 1, 2, 6 and 16 kHz, which the specification lists as seven values, across an adjustment range of plus or minus 12 dB.

Output is rated at 29W x 4 into 4 ohms at 1 kHz and 10 percent THD with a maximum of 47W x 4, and the pre-out delivers 1500 mV into 10 kohm with an output impedance of 600 ohm or less. Supplied parts cover the power harness and mounting hardware, with no remote control listed.

DPX-6100MD SPECIFICATIONS
Media	MiniDisc and CD
FM tuner	76.0 -> 90.0 MHz in 100 kHz steps. Usable sensitivity 9.3 dBf (0.8 uV/75 ohm), S/N 50 dB sensitivity 15.2 dBf (1.6 uV/75 ohm), frequency response 30 Hz -> 15 kHz (plus or minus 3.0 dB), S/N 75 dB mono, selectivity 80 dB or more (plus or minus 400 kHz), stereo separation 40 dB (1 kHz)
AM tuner	522 -> 1629 kHz in 9 kHz steps, sensitivity 28 dBu (25 uV)
MD section	GaAlAs double-hetero laser diode (780 nm), 8x oversampling digital filter, 1-bit D/A converter, 400 -> 900 rpm constant linear velocity, wow and flutter below measurable limits, frequency response 20 Hz -> 20 kHz (plus or minus 1 dB), THD 0.005% (1 kHz), S/N 90 dB (1 kHz), dynamic range 90 dB, stereo separation 85 dB
CD section	GaAlAs double-hetero laser diode (780 nm), 8x oversampling digital filter, 1-bit D/A converter, 200 -> 500 rpm constant linear velocity, wow and flutter below measurable limits, frequency response 10 Hz -> 20 kHz (plus or minus 1 dB), THD 0.01% (1 kHz), S/N 93 dB (1 kHz), dynamic range 93 dB, stereo separation 85 dB
Audio section	Maximum output 47W x 4, rated output 29W x 4 (4 ohm, 1 kHz, 10% THD), pre-out level 1500 mV/10 kohm, pre-out impedance 600 ohm or less
DSP and equaliser	Third-order delta-sigma A/D and D/A converters, 18-bit, 128 times oversampling. Equaliser centre frequencies 60, 160, 400 Hz, 1, 2, 6, 16 kHz, adjustment range plus or minus 12 dB
Supplied parts	Power harness, truss screws M5 x 6 mm (six), bind screw M4 x 6 mm (one). No remote control listed
Electrical	14.4V (11 -> 16V), maximum current draw 10.0A
Form factor	Double-DIN, mounting dimensions 178 x 100 x 155 mm, mass 2.9 kg
Source	Kenwood owner's manual, publication B64-1719-20