Dared DV-845 Amplifiers

5/5 (1 Reviews)


Product Description

Dared DV-845 MONOBLOCK POWER AMPLIFIER (SINGLE-END CLASS A)
TECHNICAL SPECIFICATIONS:
  • MAX OUTPUT POWER: 20W
  • FREQUENCY RESPONSE: 20-20KHz (±0.8dB)
  • DISTORTION: =1%
  • SIGNAL TO NOISE RATIO: =89dB
  • INPUT SENSITIVITY: 750mV
  • INPUT IMPEDANCE: 100K ohm
  • OUTPUT IMPEDANCE: 4 ohm/8 ohm
  • SIZE: L495 X W260 X H180 MM /piece
  • WEIGHT: 25.0Kgs/piece
  • THE TUBE USED: 845x2,6SN7x4


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    Reviews 1 - 1 (1 Reviews Total)

    User Reviews

    Overall Rating:5
    Value Rating:5
    Submitted by andrewmcalister a AudioPhile

    Date Reviewed: September 3, 2010

    Bottom Line:   
    I brought these for $3400 dollars and compared them to my Plinius SA 250. I found them to be more detailed than the Plinius, but a bit less control of bass. If you like rock music, you would have to bi-amp with something that can supply more bass power. For 90% of music they are very very good. With my Jordan JX53 array speakers (92 db/w) there was some sound stage image for some music. 3 stars as manufactured.
    I have now modified the amplifiers by replacing 7 resistors in each amp with tantalum Shinkoh non-inductive resistors. This alone made an enormous difference to clarity and sound stage, I also then changed the 4 Auricap capacitors (rated 8/14) with Ampohm copper foil paper in oil rated (12/14). This made a further improvement.
    I now hear the sound stage easily. I have been listening to my collection over again. Everything is different.
    Many cd's completely captivate me now but didn't before, some I thought were good, now are shown to be imperfect recordings (Reference recordings are fantastic!). I enjoy choir and prom recordings most. I get a strong sense of looking down on the choirs in the Royal Albert Hall. Voices often sound like there is a real person behind the curtain (I've got heavy curtains around the room), or standing in the middle of the room.
    I'm just so moved every time I listen, I wish I could share it with more people.
    Next improvement will be to replace speaker resistors for non-inductive ones. Then add bypass capacitors to the amps.


    The idea I have stuck to is to use minimal components, no pre-amp.
    The speakers are full range (100 Hz to 20,000) and only have a capacitor (2Uf Mundorf Silver PIO) and resistors in parallel. They roll off by themselves at about 15o Hz. There are 4 JX53's in each Jordan designed cabinet (I built them). For bass I have made 6ft long by 2ft high 'coffins' - transmission lines with Kef B139's.
    These roll in at about 220Hz. I have used a 3rd order bass Xover because with the 1st order, I found these went all the way up to about 1200 Hz, causing a muddying of the mid range.
    Although I have a Music First Copper pre-amp (passive), I don't use it for CD's because I find that it lightens the bass slightly (a common finding with passives apparently, I guess bass is reduced by 3 to 6 db). I have an Ah Njoe Tjoeb CD player with all extras, incl. 24bit 192kH up-sampler. This has an in-build volume control, which I usually have at above 75% as I've tweaked it to match the sensitivity of the amps.

    I think Dared should offer an option to build with those components.

    Expand full review >>

    Used product for:   3 Months to 1 year

    Duration Product Used:   AudioPhile

    Product model year:   2005




    Reviews 1 - 1 (1 Reviews Total)

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