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Densen phono dp-drive mc+xs
- Thread starter psych70
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Απάντηση: Densen phono dp-drive mc+xs
νεα και τελικη τιμη 450 ευρο[700 κανει καινουργιο]3 μηνων αστρωτο με το μεγαλο τροφοδοτικο + κουτι κτλ 1ο χερι και εγγυηση εφ ορου ζωης!
Densen's DP Drive/DP-02 moving-coil phono-to-line level pre-amp uses optical means to minimise noise intrusion. Does this radical design result in a performance breakthrough?
Even more radical than Densen's no-feedback DM10 and Beat integrated amps, Densen's DP Drive resorts to optical linkage in the power supply. Instead of using stabilised DC from the mains to feed the amplifying circuits, it powers two light bulbs, each of which shines on a trio of tiny photo-voltaic cells to turn electricity into light and back again.
Opto-isolation has one function: to provide total mains isolation of the disc pre-amp. There's no direct path for RF interference, surges, pulses, clicks or bangs. At switch-on, a slow-start circuit prevents amplifier operation until the DP Drive electronics have stabilised.
Reflecting its Danish antecedence, the DP Drive has a superbly neat, simple black-anodised aluminium case, comprising precise-fitting machined extrusions. Inside lies a mother board holding two stabilised power supplies with a smaller, densely populated plug-in surface-mount PCB riding piggy back. It's this PCB which holds the light bulbs and photocells and provides both amplification and inverse RIAA correction. A moving-magnet version (DP-01) is also available.
Each channel utilises six, tiny, discrete, surface-mount transistors and numerous passive components. Unusually, the input stage senses cartridge output current. Densen claims thereby to obviate the need for input load fine-tuning.
For the listening tests, I used a Pink Triangle Anniversary with SME Series V arm and Audio Technica AT-OC9 cartridge, loaned from Sevenoaks Hi-Fi in Bury St Edmunds, and (now sounding really rather fine) my AR Legend/Rega RB 300/Dynavector Karat DV17D.
The Densen was noticeably immune to impulsive mains-born noise, yet slightly more sensitive to positioning away from hum sources than LFD MC1 or Henley HMC100 disc pre-amps used for comparison. An extremely quiet background hiss was lost beneath background noise. Sonically the DP Drive/DP-02 was an absolute delight, with sweet, clean treble; warm yet firm, rhythmic, rich, clear and highly articulate bass, almost indistinguishable from the LFD, and excellent solidity, depth and control. Midrange/treble sounds were lucid, and high treble slightly crisper and harmonically richer.
Playing 'Rhiannon' from Fleetwood Mac's Fleetwood Mac through the Densen reminded me just how brilliant Mick Fleetwood's drumming is on this album. The Densen also captured the suitably manic pace of the powerful drum rhythms that drive Stravinsky's Petrushka (Concertgebouw Colin Davis Philips 9500 447). The LFD did virtually the same, while the Henley HMC 100 could not quite match the bass performance of either. The Densen's resolution of this hall acoustic and the sound of Brubeck's piano on an old direct-cut Dave Brubeck Quartet album A Cut Above (Direct Disc Labs DD-106) were very nearly, but not quite as good as the Henley's.
Yet the Densen made vocals on 'Rhiannon' marginally the most tangible of all three amps. More than the other amps, it made the counterpoint between two piccolos and single horn in Petrushka sound sublime. And when I listened to an old Emperor Concerto recording (Symphonica SYM 10) by Charles Rosen, it made each piano note carry more weight.
The DP Drive/DP-02 really rocks when it has to. It gets to the heart of the music, whatever the style. It has much in common with the LFD, yet it costs only £350. A beautifully crafted and superb-sounding unit, the DP-02 gave a satisfying sound - if you love vinyl replay at its finest and most intimate then the DP-02 simply must be on your listening list.
http://www.densen.dk/index.php?page=products&produkt=phonostage
LAB REPORT
On test, the Densen's distortion harmonics at 1kHz were impossible to pick out from the low noise background and must be below 0.005% (better than -85dB). Gain at 1kHz was 66dB, bringing 125uV at the cartridge up to 250mV. (All signal-to-noise ratios measured were with reference to 250mV output and input overloads ref. to 125uV). Overall, noise mas very low, more than 80dB domn at 1kHz, improving to better than - 100dB at 20kHz (that's why the DP-O2 is so quiet in use). At low frequencies it worsened, with hum -57dB at 5OHz. (Remember the gain at 20Hz is approaching 86dB due to RIAA correction). Input overloads were excellent: at 20Hz +30.8dB, 1kHz +26dB and at 20kHz +42dB, due to the onset of slew-rate limiting.
Crosstalk (stereo separation) worsened to around -15dB at 20Hz, but does not seem to be audible in use. Elsewhere it was much better, but depended on the test source impedance. At 10 ohms, 1kHz and 20kHz, it mas 40dB domn. At 1kohms, crosstalk improved to -60dB at both frequencies. Inverse RIAA correction for the right channel stayed within +O.2dB, 5OOHz-20kHz, while there was a minor lift around 100-200Hz, peaking at 0.87dB. Correction was mithin 0.15dB at 5OHz and rolled off below to -4dB at 20Hz due to subsonic filtering. Channel balance, above 70Hz, was within -O.25dB, the left diverging only by -0.4dB (max) at around 40Hz. There was virtually no DC offset and output impedance was a low 125 ohms. Excellent results, overall, with only the low-freguency crosstalk an oddity.
νεα και τελικη τιμη 450 ευρο[700 κανει καινουργιο]3 μηνων αστρωτο με το μεγαλο τροφοδοτικο + κουτι κτλ 1ο χερι και εγγυηση εφ ορου ζωης!
Densen's DP Drive/DP-02 moving-coil phono-to-line level pre-amp uses optical means to minimise noise intrusion. Does this radical design result in a performance breakthrough?
Even more radical than Densen's no-feedback DM10 and Beat integrated amps, Densen's DP Drive resorts to optical linkage in the power supply. Instead of using stabilised DC from the mains to feed the amplifying circuits, it powers two light bulbs, each of which shines on a trio of tiny photo-voltaic cells to turn electricity into light and back again.
Opto-isolation has one function: to provide total mains isolation of the disc pre-amp. There's no direct path for RF interference, surges, pulses, clicks or bangs. At switch-on, a slow-start circuit prevents amplifier operation until the DP Drive electronics have stabilised.
Reflecting its Danish antecedence, the DP Drive has a superbly neat, simple black-anodised aluminium case, comprising precise-fitting machined extrusions. Inside lies a mother board holding two stabilised power supplies with a smaller, densely populated plug-in surface-mount PCB riding piggy back. It's this PCB which holds the light bulbs and photocells and provides both amplification and inverse RIAA correction. A moving-magnet version (DP-01) is also available.
Each channel utilises six, tiny, discrete, surface-mount transistors and numerous passive components. Unusually, the input stage senses cartridge output current. Densen claims thereby to obviate the need for input load fine-tuning.
For the listening tests, I used a Pink Triangle Anniversary with SME Series V arm and Audio Technica AT-OC9 cartridge, loaned from Sevenoaks Hi-Fi in Bury St Edmunds, and (now sounding really rather fine) my AR Legend/Rega RB 300/Dynavector Karat DV17D.
The Densen was noticeably immune to impulsive mains-born noise, yet slightly more sensitive to positioning away from hum sources than LFD MC1 or Henley HMC100 disc pre-amps used for comparison. An extremely quiet background hiss was lost beneath background noise. Sonically the DP Drive/DP-02 was an absolute delight, with sweet, clean treble; warm yet firm, rhythmic, rich, clear and highly articulate bass, almost indistinguishable from the LFD, and excellent solidity, depth and control. Midrange/treble sounds were lucid, and high treble slightly crisper and harmonically richer.
Playing 'Rhiannon' from Fleetwood Mac's Fleetwood Mac through the Densen reminded me just how brilliant Mick Fleetwood's drumming is on this album. The Densen also captured the suitably manic pace of the powerful drum rhythms that drive Stravinsky's Petrushka (Concertgebouw Colin Davis Philips 9500 447). The LFD did virtually the same, while the Henley HMC 100 could not quite match the bass performance of either. The Densen's resolution of this hall acoustic and the sound of Brubeck's piano on an old direct-cut Dave Brubeck Quartet album A Cut Above (Direct Disc Labs DD-106) were very nearly, but not quite as good as the Henley's.
Yet the Densen made vocals on 'Rhiannon' marginally the most tangible of all three amps. More than the other amps, it made the counterpoint between two piccolos and single horn in Petrushka sound sublime. And when I listened to an old Emperor Concerto recording (Symphonica SYM 10) by Charles Rosen, it made each piano note carry more weight.
The DP Drive/DP-02 really rocks when it has to. It gets to the heart of the music, whatever the style. It has much in common with the LFD, yet it costs only £350. A beautifully crafted and superb-sounding unit, the DP-02 gave a satisfying sound - if you love vinyl replay at its finest and most intimate then the DP-02 simply must be on your listening list.
http://www.densen.dk/index.php?page=products&produkt=phonostage
LAB REPORT
On test, the Densen's distortion harmonics at 1kHz were impossible to pick out from the low noise background and must be below 0.005% (better than -85dB). Gain at 1kHz was 66dB, bringing 125uV at the cartridge up to 250mV. (All signal-to-noise ratios measured were with reference to 250mV output and input overloads ref. to 125uV). Overall, noise mas very low, more than 80dB domn at 1kHz, improving to better than - 100dB at 20kHz (that's why the DP-O2 is so quiet in use). At low frequencies it worsened, with hum -57dB at 5OHz. (Remember the gain at 20Hz is approaching 86dB due to RIAA correction). Input overloads were excellent: at 20Hz +30.8dB, 1kHz +26dB and at 20kHz +42dB, due to the onset of slew-rate limiting.
Crosstalk (stereo separation) worsened to around -15dB at 20Hz, but does not seem to be audible in use. Elsewhere it was much better, but depended on the test source impedance. At 10 ohms, 1kHz and 20kHz, it mas 40dB domn. At 1kohms, crosstalk improved to -60dB at both frequencies. Inverse RIAA correction for the right channel stayed within +O.2dB, 5OOHz-20kHz, while there was a minor lift around 100-200Hz, peaking at 0.87dB. Correction was mithin 0.15dB at 5OHz and rolled off below to -4dB at 20Hz due to subsonic filtering. Channel balance, above 70Hz, was within -O.25dB, the left diverging only by -0.4dB (max) at around 40Hz. There was virtually no DC offset and output impedance was a low 125 ohms. Excellent results, overall, with only the low-freguency crosstalk an oddity.
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Απάντηση: Densen phono dp-drive mc+xs
Μήπως τυχαίνει να σε ενδιαφέρει ανταλλαγή με το phono primare r20 titanium???
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