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  • mattp
    replied
    Brian,

    You should not have had to cover return shipping charges for a defective product (within a certain time period). If you did not call our customer service I recommend doing so. They will get this straightened out. Also, It is very unusual to have this many issues with this amp, of the dozens I have tested I haven't come across either of these problems. I would recommend asking if one of the techs can pull one from stock to test prior to shipping to you.

    MP

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  • Brian Steele
    replied
    I'm having pretty bad luck with this particular Dayton product it seems.  The first one arrived with a dead power supply brick, and I had to send brick plus amp back for replacement and eat the shipping charges.  Now it looks like the BT feature on the replacement isn't working properly. I just had the opportunity to test it, and the volume I'm getting via BT is significantly lower than if I plug in the same source directly (via the RCA jacks). Shucks.  I don't want to go through the drama of returning it again. It does sound fantastic when I use on of the AUX inputs. 

    Leave a comment:


  • ejh2854
    replied
    Originally posted by Brian Steele View Post
    Just a quick update - while it's unfortunate that the DTA 2.1 doesn't have an adjustable LP (or HP) filter, it can work quite well when you take its features (or lack thereof) into consideration. I recently used it with my "Mini-Me" speakers (sealed 2-way boxes that roll off naturally just above 100 Hz) and my Enigma 10" 4th order BP subwoofer (rolls off naturally above 100 Hz) to provide background music for a get-together, and the combination sounded really impressive. The 180~180 Hz LP filter on the subwoofer channel is far enough out of the passband of the bandpass subwoofer to not adversely affect its performance, but close enough to help to reduce the out of band noise (which is already quite low with the Enigma design - a happy accident, but I believe I know now how that "accident" works, so I can use it for future 4th order BP designs).
    Similar situation here, and probably just another happy accident- I have the DTA 2.1 in my office running a pair of C-Notes and one Anarchy tapped horn, and it took very little dithering to get the whole mess sounding good.

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  • rpb
    replied
    I was also thinking that bandpass would work. A pair of 3-way speakers with mono bass could be built, and this would eliminate some of the x-over parts needed to cross the woofers low. Possibly even a bandpass in each cabinet.

    Leave a comment:


  • Brian Steele
    replied
    Just a quick update - while it's unfortunate that the DTA 2.1 doesn't have an adjustable LP (or HP) filter, it can work quite well when you take its features (or lack thereof) into consideration. I recently used it with my "Mini-Me" speakers (sealed 2-way boxes that roll off naturally just above 100 Hz) and my Enigma 10" 4th order BP subwoofer (rolls off naturally above 100 Hz) to provide background music for a get-together, and the combination sounded really impressive. The 180~180 Hz LP filter on the subwoofer channel is far enough out of the passband of the bandpass subwoofer to not adversely affect its performance, but close enough to help to reduce the out of band noise (which is already quite low with the Enigma design - a happy accident, but I believe I know now how that "accident" works, so I can use it for future 4th order BP designs).

    Leave a comment:


  • Dropcarve
    replied
    Originally posted by Gordy View Post

    I have often wondered how these would work out for home audio as well. I run an Audio Control EQS and 6XS in my truck

    https://www.youtube.com/watch?v=32J7Se6cXg4

    Leave a comment:


  • mmbone4
    replied
    See, I learn something new everyday. Great find...I have not had any issues with Douk/Nobsound boards thus far. Also, back to the DTA 2.1 board, I do think I am having an issue with the board. Last night the power and BT was intermittent. So Mike, maybe the bass issue I am having is the board malfunctioning.

    I am ordering a new one and will let you know.

    Thanks.

    Leave a comment:


  • Millstonemike
    replied
    Originally posted by mmbone4 View Post
    Hey guys, the PE board is not a Douk board. I have several Douk boards and they are good boards. The branding on the actual amp board for the DTA 2.1 is actually from a company called FX Audio. Pretty solid reviews on their DACs. PE is actually selling this for cheaper than you can buy from FX and PEs includes the 24v power supply.
    Douk and FX are brands under Chinese companies from Shenzhen. I missed a "G" and thought they were under the same umbrella of Chinese Co.'s.

    My mistake, sorry. How many lashes?

    FX Douk.png

    Leave a comment:


  • Gordy
    replied
    Originally posted by Millstonemike View Post
    I imagine that the auto market for pre-amps, amps etc. is far larger than the DIY market. Hence economies of scale. And the consumer market isn't really focused on the level of features we would like.

    I was looking at the pre-amps from various low cost vendors. One nice thing about these units is the "aux" input is really suited for phones/mp3 players' low amplitude output.

    The first to come up searching "car pre-amp" in the automotive category on Bezos site ... EDIT: But these seem to have all the controls on the front except for input gain. there are trunk units that can be hidden away after setting (that include HP) but there in the 4100+ category.
    I have often wondered how these would work out for home audio as well. I run an Audio Control EQS and 6XS in my truck

    Leave a comment:


  • mmbone4
    replied
    Hey guys, the PE board is not a Douk board. I have several Douk boards and they are good boards. The branding on the actual amp board for the DTA 2.1 is actually from a company called FX Audio. Pretty solid reviews on their DACs. PE is actually selling this for cheaper than you can buy from FX and PEs includes the 24v power supply.

    Leave a comment:


  • Brian Steele
    replied
    Originally posted by Millstonemike View Post
    The first to come up searching "car pre-amp" in the automotive category on Bezos site
    ​Ah, that's what you were referring to as "pre-amps". I normally refer to those things as "signal processors", with the deck providing the pre-amp duty

    ​Here's a deck for which Pioneer publishes a list price of $100. It has all the EQ and filtering needed (the deck can be run in three-way mode) and line-level outputs for the amps for the main speakers and subs. It also has a built-in 50Wx4 (LOL, ok, ok, 17W RMS per channel) that can be used for the main speakers. You can theoretically set up a fully-active 2.1 system with this deck by using the front and rear channels to drive two-way mains (using the filtering options) and drive a separate amplified subwoofer via the sub out terminals.

    http://www.pioneerelectronics.com/PU...ers/MVH-S501BS

    Leave a comment:


  • mmbone4
    replied
    Hi Geoff, I was the one that Mike was speaking of about the lack of bass. To be very clear, I am not saying that the amplifier wont push my sub. In fact, it sounds great. My problem is that the 2x50 side is pushing 2 x Fountek FE85s so loud that the bass sounds weak. I cannot balance it by turning the full range down. I just ordered today some resistors to push them down 3db to try and equalize. We will see...

    My initial set up had the FE85s front facing and the Tang Band W5 down firing and I remember the first time I hooked this amp up, the bass was much louder. Now I have reconfigured this to all three speakers front facing and now I have the issue where my full range is much louder. I was wondering if something happened to the amp...IDK.

    Now, what I can say is that it is built very well and the only amp I have seen that will allow you to change the input the way it does. This allows me to use the BT, the Aux and add wifi. I look forward to continuing to play with this as it is one of the nicest ones I have found. And trust me, I have ordered almost every Chinese one on the market.

    MB

    Leave a comment:


  • Millstonemike
    replied
    Originally posted by Brian Steele View Post

    ​For a 2.1 system, that approach could be done with a car audio pre-amp and a separate power-amp (if necessary), but it won't be a nice 'n' tidy solution that a package like the DTA2.1 can offer with a few tweaks to the design, and it's open to twiddling by the user..

    ​It is however interesting that the level of DSP control I'm referring to can be offered in a car audio pre-amp for low $$$. Which particular unit were you referring to BTW? I was looking at some of the Pioneer "headless" options for installation in SWMBO's car.
    I imagine that the auto market for pre-amps, amps etc. is far larger than the DIY market. Hence economies of scale. And the consumer market isn't really focused on the level of features we would like.

    I was looking at the pre-amps from various low cost vendors. One nice thing about these units is the "aux" input is really suited for phones/mp3 players' low amplitude output.

    The first to come up searching "car pre-amp" in the automotive category on Bezos site ... EDIT: But these seem to have all the controls on the front except for input gain. there are trunk units that can be hidden away after setting (that include HP) but there in the 4100+ category.

    Car Pre-amp.png

    Leave a comment:


  • Brian Steele
    replied
    Originally posted by Millstonemike View Post

    Why not use one of the ~$40 car pre-amps. It has the recessed controls you want, LP, HP all sorts of goodies including graphic EQ. It'll run on low amp 12 V source. Build a wood case (most have nice face plates), some may have BT (or add it) and feed a power amp(s).
    ​For a 2.1 system, that approach could be done with a car audio pre-amp and a separate power-amp (if necessary), but it won't be a nice 'n' tidy solution that a package like the DTA2.1 can offer with a few tweaks to the design, and it's open to twiddling by the user..

    ​It is however interesting that the level of DSP control I'm referring to can be offered in a car audio pre-amp for low $$$. Which particular unit were you referring to BTW? I was looking at some of the Pioneer "headless" options for installation in SWMBO's car.

    Leave a comment:


  • Millstonemike
    replied
    Originally posted by Brian Steele View Post

    ​That does look interesting. However, implementing the filter adjustments as external pots does dampen my enthusiasm for it. I don't want some eedeeot fiddling around with those knobs and putting my speakers at risk trying to reproduce low frequency signals they were not designed to produce - that's why I prefer the filtering implemented as internal pots that you have to go through just a bit more trouble to adjust than just turning a knob on the front panel.

    ​I just thought - wouldn't it be sweet if the filtering was implemented via DSP? . It would probably add too much complexity to what's basically positioned as a basic 2.1 amp...
    Why not use one of the ~$40 car pre-amps. It has the recessed controls you want, LP, HP all sorts of goodies including graphic EQ. It'll run on low amp 12 V source. Build a wood case (most have nice face plates), some may have BT (or add it) and feed a power amp(s).

    "eedeeit" what toon was that from "You eedeeot".

    Leave a comment:

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