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Powered Sub Hooked Up To T-Amp?

post #1 of 13
Thread Starter 

I just recently bought a pair of Polk Audio Monitor 30's for my 2.1 computer setup and I'm looking to purchase a sub. I came across the PSW100 from Polk Audio for a really good deal that I don't think I can pass up.

 

I was thinking of running a Topping VX1 for the speakers, but I know there isn't an extra channel for a sub. Can I run the speakers to the sub and the sub back to the amp/DAC or some version like that?

 

I am truly unsure what the best way to go. Do I get a HT receiver instead and just run the speakers and sub off that? Is it powerfull enough?

 

Should I also get an amp/dac to compliment a receiver?  AHHHH Help!!! :)

 

 

P.S. I will be using it for music, gaming and youtube videos. No movies or TV Shows.


Edited by BabylonDown - 3/14/14 at 5:24pm
post #2 of 13
Thread Starter 

Just a tiny update.

 

I was rummaging through my cellar and noticed I have a Panasonic SA-PT750 Home Theater System.

 

http://www.crutchfield.com/S-NurfFsFlDSk/p_133SCPT750/Panasonic-SC-PT750.html#overview-tab

 

It has 2 channels at 3ohm for the fronts, 1 center channel at 6ohms and a sub channel at 6ohms.

 

Is it safe to hook up My 8 ohm Monitor 30's to the 3ohm channels?

 

This receiver doesn't have a DAC it seems, no optical or USB connection, but I do want to give it a try with my speakers for now.

post #3 of 13
What is your budget for the sub? There may be better options for you. What is your max budget for an amplifier/receiver?

The Topping VX1 is already getting up closer to the cost of an entry level receiver, and the only significant advantage it has is the smaller footprint/footprint. Whereas a receiver would offer you other features that might be useful now and in the future. Particularly, a used receiver could be a very good value. It's typically possible to find a good used Denon, Onkyo, Yamaha, Harman Kardon, or Pioneer receiver on your local Craigslist if you live in a city of any size.

As for the Panasonic, it's not going to hurt your speakers to hook them up to that. And if you get a subwoofer with speaker level inputs, I would think you could run the sub channel to it and it would work (not sure).

However, those types of HTIB receivers are (a) often a good bit lower in sound quality than the brands I mentioned above and (b) the subwoofer/speaker crossover is hard coded into the receiver. Given how small the original satellites were, probably going to have a crossover much higher than your speakers and sub need. You could certainly give it a try and see what you think of the sound.
post #4 of 13
Thread Starter 
Quote:
Originally Posted by cel4145 View Post

What is your budget for the sub? There may be better options for you. What is your max budget for an amplifier/receiver?

The Topping VX1 is already getting up closer to the cost of an entry level receiver, and the only significant advantage it has is the smaller footprint/footprint. Whereas a receiver would offer you other features that might be useful now and in the future. Particularly, a used receiver could be a very good value. It's typically possible to find a good used Denon, Onkyo, Yamaha, Harman Kardon, or Pioneer receiver on your local Craigslist if you live in a city of any size.

As for the Panasonic, it's not going to hurt your speakers to hook them up to that. And if you get a subwoofer with speaker level inputs, I would think you could run the sub channel to it and it would work (not sure).

However, those types of HTIB receivers are (a) often a good bit lower in sound quality than the brands I mentioned above and (b) the subwoofer/speaker crossover is hard coded into the receiver. Given how small the original satellites were, probably going to have a crossover much higher than your speakers and sub need. You could certainly give it a try and see what you think of the sound.

#1. My budget for a sub is pretty low. Under $100. The PSW10 I can pick up for $60. Probably a good start?

 

#2 I was under the impression that a dedicated amp/dac has better sound quality than a HT Recever, but then again there are alot of snobs out there and I am no audiophile. :D I may have the ability to pick up a Denon AVR-E200, which I've heard good things about for about $100, which would actually be cheaper than a Topping VX-1.

 

#3 Perfect, thanks

 

#4 I understand now.

 

Now I want to run my headphones also from an amp/dac. Would I benefit much using a Topping VX1 over the amp/dac in a HT Receiver?

post #5 of 13
That's an excellent value on the E200. Worth considering because you would eventually be able to build it out into a 5.1 setup if you chose to.

The Topping VX-1 may have a better headphone amp built in (I just don't know). I wouldn't count on the DAC in the VX-1 being noticeably better unless some pro review has verified that it's better than what's in a receiver like that. What kind of headphones do you have?

The amp in the Denon is significantly more powerful, with 75 watts into 8 ohms with THD 0.08 %. That's pretty good. Compare that to the Topping which is 0.1% @ 6W 8ohm. So the Denon likely has more headroom above 75 watts, and the Topping is running out of steam at 6 watts. If you want to crank it up, the Denon should run a lot louder before starting to distort.

Do you have a coaxial, optical, or HDMI out on your computer? That's what you would need to hook up the Denon. The Denon also has good bass management options for integrating a subwoofer.

For $60 the PSW100 would be a good starter sub. If you are buying it used and it is several years old, it might be better to pick up a brand new PSW10. They are often $100 on Amazon. Sometimes the Pioneer SW-8 subwoofer goes on sale at Newegg and other places for <$100.
post #6 of 13
Thread Starter 
Quote:
Originally Posted by cel4145 View Post

That's an excellent value on the E200. Worth considering because you would eventually be able to build it out into a 5.1 setup if you chose to.

The Topping VX-1 may have a better headphone amp built in (I just don't know). I wouldn't count on the DAC in the VX-1 being noticeably better unless some pro review has verified that it's better than what's in a receiver like that. What kind of headphones do you have?

The amp in the Denon is significantly more powerful, with 75 watts into 8 ohms with THD 0.08 %. That's pretty good. Compare that to the Topping which is 0.1% @ 6W 8ohm. So the Denon likely has more headroom above 75 watts, and the Topping is running out of steam at 6 watts. If you want to crank it up, the Denon should run a lot louder before starting to distort.

Do you have a coaxial, optical, or HDMI out on your computer? That's what you would need to hook up the Denon. The Denon also has good bass management options for integrating a subwoofer.

For $60 the PSW100 would be a good starter sub. If you are buying it used and it is several years old, it might be better to pick up a brand new PSW10. They are often $100 on Amazon. Sometimes the Pioneer SW-8 subwoofer goes on sale at Newegg and other places for <$100.


#1 That's what I figured.

 

#2 Right now I'm running Sennheiser PC350 headset for gaming, but plan on picking up either HD598, HD650, Q701 or DT880's.

 

#3 Fair enough

 

#4 I'm just finishing up my PC build and the mobo I'm using has built in higher end DAC with Opitcal and will also have HDMI.


#5. Alright, I will find out how old the sub is and make a decision based on that. Unfortunately I'm in Canada and everything is more expensive here. No matter where I look I would pay about $150 new for the sub.

post #7 of 13

I'm not familiar with that particular sub but if it has speaker wire inputs it probably works like this:

 

Amp > Speaker cable > Speaker level inputs on sub > Sub crossover takes bass to sub, sends highs to outputs > speaker wire > speakers

post #8 of 13
Yeah. Canada sucks for buying home audio compared to US audio prices. In that case, the E200 is a great deal (lol). Futureshop sometimes has a good price on the Polk PSW10 if the PSW100 falls through.

Receivers sometimes have problems with very low impedance headphones because their impedance output isn't low enough, but tend to do well with higher impedance ones. You might search in the AVS receivers & amps forum. They might have an owners thread for the E200. At the very least, you could ask the receiver experts there how it does with those headphones. Of course, Topping "claims" 16-300Ω for the XV-1, but that's no guarantee that the low impedance is what is should be.
Edited by cel4145 - 3/15/14 at 10:07am
post #9 of 13
Thread Starter 
Quote:
Originally Posted by kraken2109 View Post
 

I'm not familiar with that particular sub but if it has speaker wire inputs it probably works like this:

 

Amp > Speaker cable > Speaker level inputs on sub > Sub crossover takes bass to sub, sends highs to outputs > speaker wire > speakers

I see what you mean. The PSW10 does have speaker inputs and outputs.

 

[IMG]http://i.imgur.com/uisjEXAl.jpg[/IMG]


Edited by BabylonDown - 3/15/14 at 10:09am
post #10 of 13
Yep. You can use the speaker level inputs/outputs on that sub to hook up to the Topping.

However, note that the crossover on that sub is likely not filtering the highs. So what you would do is set the crossover on the sub near the low frequency roll off of your M30s to kind of match it up. Whereas the Denon would have full crossover management that does filter the highs.
post #11 of 13
Quote:
Originally Posted by cel4145 View Post

Yep. You can use the speaker level inputs/outputs on that sub to hook up to the Topping.

However, note that the crossover on that sub is likely not filtering the highs. So what you would do is set the crossover on the sub near the low frequency roll off of your M30s to kind of match it up. Whereas the Denon would have full crossover management that does filter the highs.


How do you know that the polk won't do that?

In fact, maybe I'm blind but looking on the polk site I couldn't find anything about the crossover.

EDIT: Found the manual, not that it helped much

http://www.audiosource.net/wp-content/themes/passion/ftp/webmanuals/SubWoofers/PSW100%20manual.pdf


Edited by kraken2109 - 3/15/14 at 11:35am
post #12 of 13
Quote:
Originally Posted by kraken2109 View Post


How do you know that the polk won't do that?

Because the crossover frequency dial on a sub is not a full crossover; it's a low pass filter. Because subs that have a high pass filter will generally put it on an RCA line out, and they will explicitly give the high pass filter cut off frequency in the specs (it's a fixed filter). smily_headphones1.gif
post #13 of 13
Quote:
Originally Posted by cel4145 View Post


Because the crossover frequency dial on a sub is not a full crossover; it's a low pass filter. Because subs that have a high pass filter will generally put it on an RCA line out, and they will explicitly give the high pass filter cut off frequency in the specs (it's a fixed filter). smily_headphones1.gif

Well that sucks

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