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12/20/13

UNIVERSAL AUDIO LA-610

LA 610 FREQUENCY SWEEP

While my PC is on hiatus from recording I figured it would be a great time to take a look inside my LA610. I absolutely love this thing. It's my "go-to" box for all things recording.











 LA 610 INSIDE VIEW




 LA 610 EQ

I set it up on the bench and ran some simple frequency sweeps to get an idea of how the EQ responded. I would guess it is similar to a Baxandall type circuit due to the gentle nature of the
response curves. Examples of boost and cut at 4.5kHz and 70Hz frequencies are
shown.

T4 MODULE

While I was inside I just had to take a look at the T4 module so I removed the black
cover and pulled it up from its header pins.

T4 PHOTO CELLS


T4 LUMINESCENT PANEL ASSEMBLY

T4 MODULE MOUNTED

I'm still working on getting my PC up and running again. The next install is BFD II. I hope to be back in business by the end of this week.

Thanks for reading,
Trenton

6 comments:

  1. Hello, I just got a LA-610mkII and I noticed that I have the same large light-blue capacitors as you do, it's not the same as the large red WIMA'S that I see in most. Did your unit come with the large light-blue capacitors installed or was it upgraded\swapped? And what is the difference in sound? Also 7 out of the 8 smaller red capacitors are light-blue in my unit. I haven't seen anything on capacitor swaps/upgrades on these units. Thanx in advance

    ReplyDelete
  2. Hi there and thank you for your comment. I hope you are enjoying your LA610 as much as I do mine.

    My LA610 is completely stock. No modifications have been performed.

    I'm not sure about the tone differences regarding the capacitor differences. However, I do know that different caps can have an effect on distortion performance.

    I will be posting about capacitor distortion very soon. Also, I will check with my sources at Universal Audio and see what they have to say about regarding the different capacitors. I will post what I find out.
    Thanks again,
    Trenton

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  3. I appreciate your response to my questions, it's the small red capacitor to the right of the V1 tube(the bottom one)and all the rest are blue. It put put my mind at ease to knows there's someone else with a similar unit to mine. Yeah I'm having fun with it, I'm gonna run it through a Lynx E44 soundcard (my next purchase) as my front end. Thanx again!! oh and those pix of your unit are Great!!!

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  4. Hi there, I wanted to let you know that I am waiting to hear back from Universal Audio regarding your question concerning the different boxed film capacitors. I will post as soon as I know something. Thank you, Trenton

    ReplyDelete
  5. Hi again,
    I heard back from UA regarding the different colored capacitors. Basically, the different capacitors are from different manufacturers but should totally sound the same.

    So, it sounds like there's nothing to be concerned about ,regarding distortion performance, between our units.

    I will post some distortion plots of my LA610MKII very soon.

    Thanks again for your comments,
    - Trenton

    ReplyDelete
  6. I received permission to post UA's response.

    Jan 28, 5:28 PM

    Hello Trenton,

    I found a moment to chat with our repair technician, and have an answer to your question.

    The different colored caps reflect a different source vendor on the parts, but they are the same part and so there is no effect on the sound.

    So there should be no sonic difference between units with different colored caps.

    I hope that answers your question and wish you great success on all of your projects!

    Best Regards,

    Tim
    Customer Support
    Universal Audio

    ReplyDelete