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Post by DavidR on Nov 13, 2021 23:05:43 GMT -5
I believe your Loxjie A30 is 40wpc into 8 ohms.
The specs for the B+ Electrical Specifications
Efficiency: 86 dB (2.83V/1m).
Power handling: 70W continuous / 150W peak.
Recommended amplifier power: 50W – 250W / channel.
Nominal impedance: 8 ohms.
Frequency response: 48 Hz – 28 kHz (+3/-3 dB).
Crossover: 2 kHz, 12 dB / octave.
Not saying -10wpc is making the difference. It is also a Class D amp and many have the issue you describe. USB is not always the best way to go. Lastly, 48Hz is not a bass shaker frequency IMO.
I'd try the speakers on another amp and see what happens. Also, try a different sampling rate.
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Post by knucklehead on Nov 14, 2021 2:00:35 GMT -5
Check that your wiring to one of your speakers are not cross wired. If one speaker is wired incorrectly it'll cancel the mid and bass of the other speaker. Once you've heard one speaker wired backwards in a stereo setup, you'll know instantly when you hear it what's wrong.
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Post by vcautokid on Nov 14, 2021 7:54:42 GMT -5
The posts here are pretty spot on. Back wall coupling may help help your cause too. If your desk is rather far from the wall, your speakers may struggle a bit for bass. But since you said the Logitech seems better here, hmmm, that is interesting. So yep the wiring most likely is it. If not of course you always have options.
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ezen85
Seeker Of Truth
Posts: 6
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Post by ezen85 on Nov 14, 2021 8:58:12 GMT -5
Not saying -10wpc is making the difference. It is also a Class D amp and many have the issue you describe. USB is not always the best way to go. Lastly, 48Hz is not a bass shaker frequency IMO.
I'd try the speakers on another amp and see what happens. Also, try a different sampling rate.
Given they're only about 3 feet from my head and I don't want to play them all that loud this shouldn't be the current issue. My testing is done somewhere around 75-80db or absolute max 85db which means I'm using 1W max for testing. |
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ezen85
Seeker Of Truth
Posts: 6
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Post by ezen85 on Nov 14, 2021 9:38:51 GMT -5
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Post by DavidR on Nov 14, 2021 9:49:49 GMT -5
Try the speakers in another system; a conventional one.
The crossover point on the B1+ speakers is 2kHz. Most of your midrange is coming thru the ribbon. Is it the source (computer) causing the issue, amp or speakers.
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Post by leonski on Nov 14, 2021 15:08:27 GMT -5
I still like the wiring idea.
Why not just TRY swapping the leads on ONE speaker and retesting? Nothing to lose while searching for a solution using David's thoughts.
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ezen85
Seeker Of Truth
Posts: 6
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Post by ezen85 on Nov 14, 2021 16:45:49 GMT -5
I still like the wiring idea. Why not just TRY swapping the leads on ONE speaker and retesting? Nothing to lose while searching for a solution using David's thoughts. I tried intentionally cross wiring it but that wasn't the issue. |
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Post by leonski on Nov 14, 2021 21:31:03 GMT -5
Nothing lost in the try......Always try simple first.
Next up....someone suggested a computer issue with eq or whatever?
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ezen85
Seeker Of Truth
Posts: 6
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Post by ezen85 on Nov 14, 2021 21:38:07 GMT -5
I'm starting to think I'm crazy. I demo'd other speakers today and the Emotivas within other setups. I think I may just have vastly underestimated how important a subwoofer is. I was able to demo the T2+ today and didn't really hear that much more low end when used Full Range. Even the T2+s can't get the needed volume between 30-80Hz.
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Post by leonski on Nov 14, 2021 23:51:22 GMT -5
Speakers best use is NOT in a larger room, even as part of a 5.1 system. And than even with a good sub.
Speaker has that folded tweeter which has seen use by everyone from Radio Shack to Martin Logan and is a proven, good design.
They are also REAR ported so will be best near a back wall. Maybe no more than a foot away? Loosing that rear port into a large room
won't help.
Needing a sub is certainly an option. I owned Magnepan for 2 decades and they simply had no output below maybe 45hz or so. And I didn't CARE.
The rest of the presentation was fine, and even in a larger room with sufficient power.
You are well on your way to turning it UP too high and starting to destroy drivers. Just my opinion? Go listen to some live music and get a handle on what it SHOULD sound like.
It is possible you are simply expecting too much bass? If you DO get a good sub, don't cross it TOO HIGH and by all means low-cut tha main speakers so you don't 'double' up in the upper
bass / lower midrange. It'll potentially sound muddy if you do it that way.
Stay in touch.
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Post by 405x5 on Nov 15, 2021 9:16:31 GMT -5
I've only ever had PC-based systems in the past. I have a Logitech Z-5500 Digital I swapped with Micca MB-42X as well as the Logitech Z-2300 at my PC. I am making my way into the world of separates so I grabbed a Loxjie A30, Dayton SUB-1200 and Emotiva B1+. Signal chain is Desktop PC > USB > Loxjie A30 > Emotiva B1+ for Left/Right and Subwoofer out to Dayton SUB-1200. EQ flat in the Loxjie and subwoofer crossover only affects subs (B1+ will play everything it can).
I did some A/B testing and found that the top end of the B1+ is so much better than the Z-2300's tweeters. BUT, the midrange? Far, far better in the Logitech Z-2300 puny/tiny speakers. With the B1+, the midrange/bass is nowhere right now and I'm thinking I'm doing something wrong. With the subwoofer off, I did some tone sweeps and found that the speaker basically loses any proper guts/volume around 180-150Hz. That shouldn't happen until 50Hz according to the spec sheet. I've heard my friends' T-Zero+ hooked to a Denon S760H and I don't think the mids were this lacking with them.
Thoughts?
Need to hear all about your listening space….cubic footage, SPL level your looking for. Near field listening or bigger soundstage. Getting attached to the sound of a particular brand of loudspeaker is the rock foundation for all, I believe. The sub. can follow if needed. |
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Post by drtrey3 on Nov 15, 2021 9:37:11 GMT -5
Huh, I think there is something wrong with the speaker. I used my little B1s in the big room and missed the bass but that is all. Something is up.
Trey
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Post by 405x5 on Nov 15, 2021 9:54:16 GMT -5
Huh, I think there is something wrong with the speaker. I used my little B1s in the big room and missed the bass but that is all. Something is up. Trey Probably right but it appears the O.P. has bailed out of his own thread! |
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Post by drtrey3 on Nov 15, 2021 9:57:52 GMT -5
I hope because he solved the problem!
Trey
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Post by 405x5 on Nov 15, 2021 10:23:12 GMT -5
I hope because he solved the problem! Trey Perhaps 🤔 he said the issue was driving him crazy |
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Post by DavidR on Nov 15, 2021 15:23:22 GMT -5
Huh, I think there is something wrong with the speaker. I used my little B1s in the big room and missed the bass but that is all. Something is up. Trey The OP has not taken some simple steps to determine what is the issue. I hate jumping to conclusions. Far better to approach this with some basic steps.
There are 3 components that could be the issue: Computer/USB, Class D amp and the speakers.
Yes, the OP has deleted his opening post. Hmmmm
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Post by leonski on Nov 16, 2021 15:26:30 GMT -5
Huh, I think there is something wrong with the speaker. I used my little B1s in the big room and missed the bass but that is all. Something is up. Trey The OP has not taken some simple steps to determine what is the issue. I hate jumping to conclusions. Far better to approach this with some basic steps.
There are 3 components that could be the issue: Computer/USB, Class D amp and the speakers.
Yes, the OP has deleted his opening post. Hmmmm
Are you convinced by his answer that he doesn't have a +- swap on one speaker? |
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Post by DavidR on Nov 16, 2021 18:09:45 GMT -5
I don't need any subs with my speakers.
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Post by leonski on Nov 16, 2021 19:12:27 GMT -5
I don't need any subs with my speakers. Highly Subjective. system related? Expectation related? And a good idea, mainly with 'effects' laden movies. Certainly better with a certain ratio of room size (cube feet) to woofer to LF extension of mains...... But that being said? I got on well for decades with MG-1 Magnepans....Not the 'A' or 'B' or any revision. the Original model. I'd say they were rated into the 40s somewhere. Cerainly not below 45hz or so. And that would have been -3db or -6db or worse. And even once in a room which MUST have been well North of 5000 cubic feet. A real CAVERN.....2 stories thruout..... So? I found them MUSICALLY satisfying. Did so much so good I'm almost sorry I sold 'em......Maybe todays LRS would work as well?..... and for 650$? Quite a good deal. Magnepan shows with the Mid-Bass module, not to be confused with a 'sub'. |
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