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BUDA impedance and output spec

Discussion in 'HeadRoom Premier Sponsor Forum' started by jalo, Sep 15, 2010.
  1. Jalo
    Hi Gorge or Travis:

    I've been looking for impedance spec for my BUDA and I don't think it is included on your web under BUDA spec section. I would like to know for balance and SE output, what is the impedance and power output on the BUDA , it will help me to decide how to match the kind of headphone I am interested in. Or you can direct me to find the info. I use the DPS with the BUDA. thank you.
  2. JorgeC Contributor
    Hi Jalo,
    HeadRoom BUDA Specs:
    Input impedance at 1kHz = 50K
    Output impedance at 1kHz = 0.5~0.6 Ohms
    Maximum Power Output = approx 19V rms
    Frequency Response = 10Hz ~ 50,000kHz (+/- 0.3dB)
    THD at 1V Output = <0.002%
    HR Sales & Service Manager
  3. Jalo
    Thanks Jorge, I continue to enjoy the BUDA.  It's is a great amp especially paired with the UDAC.  My HD800 and LCD2 both sounded awesome.  I really don't think I can improve too much on the SQ.  It is about 99% of what I expect real sound to be. 
    schalliol likes this.
  4. USAudio
    Sorry to revive an old thread but I had a follow-up question on the Maximum power output.
    That 19V rms seems way too high, or is that 19V p-p?
    Also, is that 19V single-ended or balanced?
  5. USAudio
    Is HeadRoom still monitoring this forum?

  6. JorgeC Contributor


    Hi USAudio,
    The HeadRoom BUDA [Balanced Ultra Desktop Amp] output spec is rated 19v in true balanced mode... Hope that helps!
    HR Operations Manager
  7. USAudio

    Hi Jorge,
    Can you confirm that that's 19v P-P or RMS?
  8. JorgeC Contributor
    Hi USAudio,
    i will confirm with our original audio engineer for this topology design Joe W. asap, but our listed specs show BUDA max output rated rms
    HR Operations Manager
  9. USAudio
    If that is indeed 19v RMS, that would mean BUDA puts out 11 watts RMS balanced into 32 Ohms and almost 3 watts RMS single-ended ???  
    There are many new high-power amps coming out to drive the orthodynamics, have you guys tried BUDA with the orthos like the HE-6 and LCD-2?
    Assuming the above numbers are correct, it seems like BUDA should drive them with authority as well.  
    If so, IMHO you guys should really be advertising that by putting those specs on your website and promoting that BUDA is a good option for driving orthos!
  10. JorgeC Contributor
    Hi USAudio,
    The BUDA max output spec is actually 10v rms in single-ended mode. My apologies for the confusion, i was looking at our HeadRoom Desktop Balanced Amp w/DAC specs [19v] from a few yrs ago; that design
    was officially discontinued by us in early 2009 due to low sales.  [​IMG]
    We have indeed used the BUDA unit with all the new planar magnetic "orthodynamic" headphones with fabulous audio results; the 'high gain' setting on the Desktop Amp drives any of those power-hungry cans effortlessly
    with rich tonal detail and deep transparency -- especially when in true balanced mode!
    HR Ops
  11. USAudio
    Hi Jorge,
    No apology necessary, just trying to clarify the specs, thanks for the info! 
    Please consider posting more detailed BUDA technicial specifications on your website since they are very good.  Output power, output impedance, headphone impedance range, gain, etc. would be useful.

    Still, 10v RMS Single Ended (3+ Watts RMS into 32 Ohms) is nothing to sneeze at.  Amps targeted at orthos is a hot category right now, you should toot your BUDA horn in that arena!

    Follow up questions:
    So at 10v RMS, and given the fully balanced design of the BUDA, can I correctly assume we're talking 40v RMS BALANCED???
    What about those other specifications given earlier such as Output impedance, FR, THD, etc.  Were they for the older unit as well or did they apply to the current BUDA?
  12. JorgeC Contributor
    Hey USAudio,
    Thanks for the kind reply!
    The other BUDA specs have been 100% confirmed by our HR audio engineer / topology designer for the unit -- with one exception:
    The actual BUDA input impedance at 1kHz is 70k Ohms (not 50k Ohms) [​IMG]
    Here's another confirmed BUDA spec not listed in this thread:
    Max Input Level at 1kHz = 3v
    We do indeed plan to do a big HeadRoom Marketing push for the BUDA with planar-magnetic cans... Please stay tuned!
    HR Operations Manager
  13. USAudio
    So to summarize the BUDA specifications:
    Input impedance at 1kHz = 70K Ohms
    Output impedance at 1kHz = 0.5 ~ 0.6 Ohms
    Maximum Power Output = 10V RMS, Single-Ended
    Frequency Response = 10Hz - 50,000kHz (+/- 0.3dB)
    THD at 1V Output = < 0.002%
    Max Input Level at 1kHz = 3v
    Nice numbers.  But no matter how nicely I ask, you're not going to give me the Balanced Maximum output power figure, are you ... ?!?  [​IMG]
    Looking forward to the BUDA Marketing push and perhaps ... a SALE on BUDAs?!?!  =)
  14. USAudio
    Any word on this?

  15. NA Blur
    I am able to drive the HE-500 on the medium gain setting in fully balanced mode including balanced headphone cables.  To me the amp has no issues driving the headphone, but the amp does reveal how neutral sounding the HE-500 can become when properly amped.  I still prefer the Denon AH-D2000 with the BUDA.  I run it single ended and am always impressed at how awesome the sound quality is.  The control on the low end is much better than the Grace Design m903 I use as a DAC which is one of the reasons I picked up the BUDA.  Going balanced gives a few benefits and having more power is one of them.
    I have not tried it with a full balanced pair of LCD-3 headphones yet, but plan to soon.  I personally do not like the looks and feel of the LCD products primarily due to weight and ergonomics, but the last set of LCD-2 Rev 2 and LCD-3 headphones I tried sounded awesome from the Grace so I imagine the BUDA will only improve the sound.
    Update to come

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