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Post by rob80b on Oct 4, 2014 9:47:03 GMT -5
Brought this up in the XSP-1 thread but thought it should be a thread on its own. Curious if anyone has indeed come up with a definite setting as to where the dials should be set for an 80Hz crossover on the XSP-1 Gen II, which may possible be different from the Gen 1. (?)  (Photo above is not mine nor my settings ) Preliminary visual readings using the bass management from my Velodyne DD12 would indicate that the 8:30 settings, on at least my Gen II and in my room, are lower than initially thought,  HP 8:30 setting with mains (Dynaudio Special 25s). (The mains are not affected when using Velodyne's EQ settings and only affect the sub)  LP 8:30 setting for sub (Velodyne DD12) (The EQ settings shown do affect the downward slope, just forgot to take a photo with the EQ flat which is very similar) Using the above setting obviously leaves a depression as the sub and mains do not produce the desired combined volume between 80Hz and 100HZ.  Sub and mains, both set at 8:30 on the dials LF setting at 12 o’clock for sub.  So, in fact 80Hz may be closer to the settings used on the USP-1 or maybe even higher at 12 o’clock. I’ll obviously do more experimenting and post my findings and in the end it’s up to me as to what works best with my equipment and in my room, but thought I’d post my observations so far. |
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Post by novisnick on Oct 4, 2014 10:34:59 GMT -5
8:30 should be 80Hz, I dont. See how it could be anything else. If the markings have any thought put into them that is, and I'm sure they wouldn't mark them frivolously!
But I see your point,,,,,,,maybe,,,8:42 AM will get you there,,,,,,he,,,,he,,,,,
That's where mine is set, ( about )
Nick
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Post by danr43 on Oct 4, 2014 11:01:32 GMT -5
I am very interested to hear what you come up with. I really like my XSP-1 gen 2 EXCEPT for the bizarrely placed crossover controls in the back of the unit. Adjusting them requires a visit to the chiropractor! Maybe it is not possible from an engineering standpoint, but I wish Emotiva would have incorporated a simple digital setting as opposed to the headlamp-small mirror-tiny screwdriver adjustment feature.
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Post by rob80b on Oct 4, 2014 12:02:57 GMT -5
I am very interested to hear what you come up with. I really like my XSP-1 gen 2 EXCEPT for the bizarrely placed crossover controls in the back of the unit. Adjusting them requires a visit to the chiropractor! Maybe it is not possible from an engineering standpoint, but I wish Emotiva would have incorporated a simple digital setting as opposed to the headlamp-small mirror-tiny screwdriver adjustment feature. Should be but not necessarily so, the controls go from 50 to 250 Hz, so a 200 Hz window, depending if they are linear or non-linear, 12:00 o’clock would be an additional 100Hz so 150HZ, so yes 8:30 should be around 80Hz.  But from my findings, my XSP-1 Gen II may be closer to what was used on the USP-1 which was 11 o’clock for 80Hz, and therefore making the markings almost frivolous. : ) |
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Post by Deleted on Oct 4, 2014 13:17:17 GMT -5
Rob, couple suggestions: 1) Go to youtube.com. Search for a 80hz tone (see i.e., www.youtube.com/watch?v=Lmx_jlgRIHE ). Play it from your laptop>DAC>XSP-1 while adjusting your XO knob for the "sweet spot. BTW, from youtube you can play about every frequency there is if needed. 2) Get a Test Tone CD, and do the same thing. They average about 10.00. |
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Post by rob80b on Oct 4, 2014 14:23:59 GMT -5
Rob, couple suggestions: 1) Go to youtube.com. Search for a 80hz tone (see i.e., www.youtube.com/watch?v=Lmx_jlgRIHE ). Play it from your laptop>DAC>XSP-1 while adjusting your XO knob for the "sweet spot. BTW, from youtube you can play about every frequency there is if needed. 2) Get a Test Tone CD, and do the same thing. They average about 10.00. Not to worry, I've got lots of CD's with test tones and what knots. Anyway I've spent the last few hours making more adjustments while keeping the 8:30 crossover settings for now. (I'll post photos later as the battery just ran out on the camera before uploading.) Suffice to say the XSP-1 is turning out to be quite the piece, the USP-1 was a fine sounding pre but after a few days of burning in the XSP-1 Gen II is really in a league of its own making the USP-1 sounding...... almost entry level, the difference IMHO is not subtle  To elaborate, any semblance of sounding solid state has pretty well been eradicated and distortion has been reduced, I’m able to push things much louder (too loud for listening at sustained levels) than with the USP-1, the XSP-1 Gen II just keeps everything under control, cool calm and collected. Instrument separation has been improved also, increasing the sound stage depth and layering, even at lower listening levels, width so far appears to be similar though. |
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Post by Boomzilla on Oct 4, 2014 15:07:49 GMT -5
I am very interested to hear what you come up with. I really like my XSP-1 gen 2 EXCEPT for the bizarrely placed crossover controls in the back of the unit. Adjusting them requires a visit to the chiropractor! Maybe it is not possible from an engineering standpoint, but I wish Emotiva would have incorporated a simple digital setting as opposed to the headlamp-small mirror-tiny screwdriver adjustment feature. Yes, the tiny pots on the black back are ergonomics hell, but despite that, the goal of the XSP-1 is to NOT have digital artifacts - It's supposed to be an "all-analog" preamp (so far as the signal path is concerned). Nevertheless, a clear guide in the owners' manual that described EXACTLY what positions correspond to what frequencies should have been mandatory. If the pots of the crossover are linear, then the markings mean one thing. If the pots are logarithmic, then they mean something else entirely. @keithl - would you kindly clarify this issue, please. |
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Post by Boomzilla on Oct 4, 2014 15:16:09 GMT -5
Rob, couple suggestions: 1) Go to youtube.com. Search for a 80hz tone...They average about 10.00. Hi islandman - Do you mean that 80 Hz on your XSP-1 crossover occurs when the wiper positions are at the 10-o-clock positions? That's the way I read your post, and if you have measured, then I trust your measurements more than others' opinions... IF your measurements are correct, then the crossover pots are not linear, but rather logarithmic. That's just criminal on the part of some designer (particularly in light of the fact that there are no position-to-frequency settings in the owners' manuals). I'd have been happier with a front-panel choice of specific-frequency crossovers. It wouldn't have been as flexible as the two continuously variable pots, but it would have been much easier to use. I'd have been happy with crossovers at 40, 60, 80, and 100 Hz. Anyone needing more (or less) has no business running a high-end preamp. |
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Post by Deleted on Oct 4, 2014 16:59:53 GMT -5
Rob, couple suggestions: 1) Go to youtube.com. Search for a 80hz tone...They average about 10.00. Hi islandman - Do you mean that 80 Hz on your XSP-1 crossover occurs when the wiper positions are at the 10-o-clock positions? That's the way I read your post, Hey Glenn, Original Post: 1) Go to youtube.com. Search for a 80hz tone (see i.e., www.youtube.com/watch?v=Lmx_jlgRIHE ). Play it from your laptop>DAC>XSP-1 while adjusting your XO knob for the "sweet spot. BTW, from youtube you can play about every frequency there is if needed. 2) Get a Test Tone CD, and do the same thing. They average about 10.00. No, I meant that the test tone CD's usually run somewhere in the $10.00 range. But I hear ya on how one of two ways the pots could work. I myself would not trust the pot markings until I verified their accuracy. What if the screen printing were slightly off? I think playing a 70hz, 90hz, i.e., test tone, and seeing how accurate the pot markings are would be one way to do a test. If the 70hz and 90hz are accurate in their markings then you could easily assume where the 80hz is I would think. |
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Post by Deleted on Oct 4, 2014 17:02:04 GMT -5
Rob, what source, and music material are you using to get your first impressions?
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Post by rob80b on Oct 4, 2014 17:11:20 GMT -5
My last few hours adjusting things, stuck with the 8:30 position as the sum of subwoofer and mains is greater than the sum of its parts despite what would have appeared as a downward notch at the crossover point, settling on a negative polarity and 90 degrees phase adjustment for the sub.  Sub no EQ  Mains  Final EQ for the subwoofer in conjunction with mains done with the microphone on a boom at ear level at the listening position.  Sub is just about perfect with its integration with the mains, tight and tuneful. |
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Post by Boomzilla on Oct 4, 2014 17:21:34 GMT -5
... If the markings have any thought put into them that is, and I'm sure they wouldn't mark them frivolously!... You're an innocent... LOL |
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Post by rob80b on Oct 4, 2014 17:23:14 GMT -5
Rob, what source, and music material are you using to get your first impressions? For CD's I'm using a Bryston BCD-1, XLRs. And listened through: Underworld’s “Dark and Long” , Anouar Brahem “Thimar" with John Surman and Dave Holland (Acoustic Jazz), Simple Minds' "New Gold Dream", Feist's “The Reminder”, Fluke’s “OTO”, Bjork’s “Debut” and Kraftwerk’s “Minimum Maximum” Still have yet to listen to a lot of vinyl but took Shriekback's "Care" and some Anthony Braxton for a spin on my Rega P25/Sumiko Blue Point II. |
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Post by rob80b on Oct 4, 2014 17:47:57 GMT -5
One other observation,
Maybe it’s just my imagination, but I’m wondering if Emotiva have not incorporated some sort of automatic Fletcher-Munson Loudness Control, I'm sure they haven't but the bass does appear to retain its body even at lower listening levels, first for me, anyone else notice this.
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Post by Boomzilla on Oct 4, 2014 19:13:39 GMT -5
The bass performance does seem to retain good substance, even at low listening levels. Fletcher-Munson? I doubt it...
The crossover was the one thing that I really disliked about my original, first generation XSP-1; I couldn't believe that a preamplifier of that quality and price would come with some unexplained markings for turnover frequencies.
I'll wait for Monday - maybe someone from Emotiva will jump in here and provide clarity.
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Post by Deleted on Oct 4, 2014 20:12:02 GMT -5
Rob: "stuck with the 8:30 position" "Sub is just about perfect with its integration with the mains, tight and tuneful." ============================================================================================ Rob, just to help me interpret your results here you say you stuck with the 8:30 setting (supposedly 80hz) on the XSP-1, but your final pic of the Velo readout shows a XO frequency of 120hz. Help me understand what is going on here? |
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Post by rob80b on Oct 4, 2014 20:13:26 GMT -5
This would have been nice.  |
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Post by novisnick on Oct 4, 2014 20:20:00 GMT -5
This would have been nice. Minus the silver trim and it's perfect!!! :-) |
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Post by rob80b on Oct 4, 2014 20:23:26 GMT -5
Rob: "stuck with the 8:30 position" Rob, just to help me interpret your results here you say you stuck with the 8:30 setting (supposedly 80hz) on the XSP-1, but your final pic of the Velo readout shows a XO frequency of 120hz. Help me understand what is going on here? So far the 8:30 position is working out just fine. As the XSP-1 is doing the crossover at 80Hz I set the Veoldyne's at 120Hz (highest setting), same as for the UMC-1 which has the sub set at 80Hz when the XSP-1 is in HT bypass mode. I could set the Velodyne at 80Hz and have the XSP-1 and UMC-1 LP crossovers set higher and may still try that when I have time. |
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Post by rob80b on Oct 4, 2014 20:27:14 GMT -5
This would have been nice. Minus the silver trim and it's perfect!!! :-) Whoops  |
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