SV101 Bench Test "Doc you have Mail"

HBombToo
HBombToo Posts: 5,256
edited February 2024 in Clubhouse Archives
For anybody interested I'm copying my bench results for my SV101. I have no idea where this should be so I slapped it into the Catch all.

If there are any questions or comments please don't hesitate to chime in... as if that needed said anyway!:p

Test Configuration:
HP 204D Oscillator set at 1.43Vrms @ 60Hz accurate to within (+.015Vrms)
SV101 Gain set to 1.43Vrms @ 60Hz for a Unity Gain reference
Fluke 73 III Multimeter used as AC Volt Meter
Note: measurements taken to 1/100th , (.01V) most significant digit for band Greater than 9 Hz. Very little, if no variation at 1/100th on the Fluke 73 III Multimeter

15Hz Filter 20Hz Filter 25Hz Filter
Frequency V rms V rms V rms

5 .01 .004 .002
6 .03 .01 .004
7 .07 .02 .008
8 .13 .03 .014
9 .21 .06 .02
10 .29 .08 .03
11 .47 .13 .05
12 .66 .20 .08
13 .88 .29 .11
14 1.12 .40 .15
15 1.32 .54 .21
16 1.48 .69 .29
17 1.59 .87 .37
18 1.66 1.03 .47
19 1.70 1.18 .58
20 1.71 1.33 .70
21 1.71 1.44 .85
22 1.70 1.53 .98
23 1.69 1.60 1.11
24 1.68 1.65 1.23
25 1.65 1.68 1.35
30 1.58 1.68 1.65
35 1.52 1.62 1.69
40 1.47 1.56 1.66
45 1.44 1.51 1.60
50 1.40 1.46 1.54
55 1.33 1.37 1.44
60 1.39 1.43 1.50
65 1.29 1.32 1.37
70 1.32 1.35 1.39
75 1.34 1.37 1.40
80 1.35 1.37 1.40
85 1.34 1.37 1.39
90 1.34 1.36 1.38
100 1.34 1.35 1.37
105 1.34 1.35 1.36
110 1.34 1.34 1.36
***WAREMTAE***
Post edited by RyanC_Masimo on
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Comments

  • faster100
    faster100 Posts: 6,124
    edited May 2003
    Ok great!! But can you translate that into english for some of us who aren't rocket scientist :) Jk so what are all those numbers?
    MY HT RIG:
    Sherwood p-965
    Sherwood sd871 dvd
    Rotel 1075 amp x5
    LSI15 mains
    LsiC center
    LSIfx surround backs
    Lsi7 side surrounds
    SVS pb12/plus2

    2 Channel Rig:

    nad 1020 Pre-amp
    Rotel 1080 stereo amp
    Polk sda 2B
    kenwood grunt Tuner
    realistic lab 450 TT
    Signal cable IC
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  • HBombToo
    HBombToo Posts: 5,256
    edited May 2003
    Your absolutely right Cliff... I should have summarized.

    What you are looking at is the Voltage variance of my subsonic filter across the band of 5Hz to 100 Hz. I set the reference voltage out of my Oscillator @ 1.4 Volts @ 60Hz and the gain on the filter to so its output was at 1.4 Volts, (Unity Gain or 0dB). I ran the test 3 times with the voltages held at a constant and the Subsonic filter setting as the variable... or cutoff at 15, 20 and 25Hz.

    Hope this helps.

    Henry
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  • Dr. Spec
    Dr. Spec Posts: 3,780
    edited May 2003
    FYI:

    Henry and I are discussing via email. So far the unit appears to be functioning correctly at each setting, but it does provide a slightly higher (10-20%) output voltage, so it is running some gain across part of the spectrum when it theoretically should read exactly 1.4v across the board. My initial hunch is that this variation is normal, but Henry is checking into some other things.

    Overall, the unit can provide up to 18 dB of gain, which should be several multiples of the input voltage unless I'm looking at this all wrong. That's where we're at right now.

    Doc
    "What we do in life echoes in eternity"

    Ed Mullen (emullen@svsound.com)
    Director - Technology and Customer Service
    SVS
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  • HBombToo
    HBombToo Posts: 5,256
    edited May 2003
    Just finished and with that same 1.43 Vrms in I can achieve 9.41 9.41 Vrms Out. Thats about 8dB out of a single RCA jack. Keep in mind I had to ad gain to get to unity...

    Also in my room my sweet spot is 13 feet from the subs so lets add another 12 dB to the 85 to back calculte to 3 feet... ~97dB is really starting to push the subs don't you think???

    Or am I missing something?

    HBomb
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  • HBombToo
    HBombToo Posts: 5,256
    edited May 2003
    http://focus.ti.com/lit/ds/symlink/opa2134.pdf

    fyi on the Op Amp.

    HBomb
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  • Dr. Spec
    Dr. Spec Posts: 3,780
    edited May 2003
    The unit appears to be functioning correctly. It can add 700%voltage if needed, and at the 0 gain setting, the small 0.1 to 0.2 volts gain incidentally added by the unit is negligible IMO and can't be heard at the subs (maybe 1/2 dB).

    Calibrate to 85 dB all around with Avia, and 88 dB for the subs, and then co-locate the subs (temporarily) in the same corner and see how much louder it gets (with no other settings touched).

    Doc
    "What we do in life echoes in eternity"

    Ed Mullen (emullen@svsound.com)
    Director - Technology and Customer Service
    SVS
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  • HBombToo
    HBombToo Posts: 5,256
    edited May 2003
    Originally posted by Dr. Spec
    The unit appears to be functioning correctly. It can add 700%voltage if needed, and at the 0 gain setting, the small 0.1 to 0.2 volts gain incidentally added by the unit is negligible IMO and can't be heard at the subs (maybe 1/2 dB).

    Doc

    Absolutely agree. At first when I saw the gain across the band I immediatly jumped to the conclusion that that was the issue. Thanks for playing sounding board and cooling my heels. It took awhile for all the data to settle in.

    I'm going to run this sweep also out of my h/k so I have a better feal for its crossover. You all might think I'm crazy but I am having a good time over here and learnen as I go.

    I measured the DC impedance of the woofers and they both came it @~ 3.1 Ohms so that means that the Samson can easily put out 550Watts. Ed, I know you mentioned this in the past but do you recall the power rating of the subs themselves? If you have it a peak power and a max continuous, "for buddy Russ;)" it would be appreciated.

    Regards
    HBomb as the Dog chasing his tail.... :lol:

    I attached a word document for anybody interested. I contains the the freq response.
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  • HBombToo
    HBombToo Posts: 5,256
    edited May 2003
    It no like it yet....
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  • faster100
    faster100 Posts: 6,124
    edited May 2003
    So are you doing these test for your own learn on? Or shouldn't SVS be testing the gear that could have busted the subs? pretty exstensive testing it sounds like and way beyond my head but seems if i bought SVS gear and it broke i would have them test and /or replace it, Not myself unless i just wanted to learn on my own, for something to do.
    MY HT RIG:
    Sherwood p-965
    Sherwood sd871 dvd
    Rotel 1075 amp x5
    LSI15 mains
    LsiC center
    LSIfx surround backs
    Lsi7 side surrounds
    SVS pb12/plus2

    2 Channel Rig:

    nad 1020 Pre-amp
    Rotel 1080 stereo amp
    Polk sda 2B
    kenwood grunt Tuner
    realistic lab 450 TT
    Signal cable IC
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  • HBombToo
    HBombToo Posts: 5,256
    edited May 2003
    Its pretty much for me and getting my learn on... I have not jumped into anything like this for over 10 years and its very refreshing compared to the dulldrums of the my usual day.

    SV told me they were going to test my subs and the more I dig the more I'm impressed with their product. I would reccommend to any who is looking for a Sub to stop at SV first and take a look. They are GREAT!

    I'm going to run the same sweep through my h/k so I have a good feal for the voltage out of the LFE then I think I'll have it pretty much nailed.

    Its a hobby right? ;) so I'm just doing the Hobby thing....

    HBomb
    ***WAREMTAE***
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  • Dr. Spec
    Dr. Spec Posts: 3,780
    edited May 2003
    Henry:

    The TC-Sounds dB-12 driver is rated for about 500-550 watts. How much peak power it can handle is unknown - probably 750+ for a few ms, which is what the Samson or the Indigo BASH amp for the PC+ can easily deliver.

    I think you may be calibrating into a null, and that's why I asked you to temporarily try both in the same corner.

    Doc
    "What we do in life echoes in eternity"

    Ed Mullen (emullen@svsound.com)
    Director - Technology and Customer Service
    SVS
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  • Dr. Spec
    Dr. Spec Posts: 3,780
    edited May 2003
    I also can't see your FR charts in Word - did they come through on the post?

    Did you move the subs and see what happened with the calibration level?

    Honestly, in that size room even with opposite corner loaded subs you should be hitting 110+ dB easily at 13 feet without bottoming or breaking the subs. It's a big room, but that's a lot of woofage you've got there.

    Doc
    "What we do in life echoes in eternity"

    Ed Mullen (emullen@svsound.com)
    Director - Technology and Customer Service
    SVS
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  • HBombToo
    HBombToo Posts: 5,256
    edited May 2003
    The Samson 1000 Amp is rated for full output full output into 4 Ohms @ 550W with 0 dBu in. 0 dBu ~ .7V. So clearly it is well matched system.

    HBomb
    ***WAREMTAE***
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  • faster100
    faster100 Posts: 6,124
    edited May 2003
    I need to unload my psw404 and i will then save and get the svs 20-39pci,
    MY HT RIG:
    Sherwood p-965
    Sherwood sd871 dvd
    Rotel 1075 amp x5
    LSI15 mains
    LsiC center
    LSIfx surround backs
    Lsi7 side surrounds
    SVS pb12/plus2

    2 Channel Rig:

    nad 1020 Pre-amp
    Rotel 1080 stereo amp
    Polk sda 2B
    kenwood grunt Tuner
    realistic lab 450 TT
    Signal cable IC
    · Share on FacebookShare on Twitter