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Need help with Subwoofer

post #1 of 9
Thread Starter 

I have a pair of Martin Logan speakers for L/R setup and im using an Topping TP30 amp for them. I also have an Martin Logan powered sub that I would like to add to the setup. The problem im having is that none of these small desktop amps have an sub output. I only have outputs for me speakers. Also the amp has a built in DAC so its connected to my computer through USB. The sub does not have high level inputs, only two L/R RCA plugs for input. Can anyone help me figure out how I can connect the sub to my current setup? Any help would be greatly appreciated..

post #2 of 9
Thread Starter 

anyone?

post #3 of 9

I'm thinking of some simple type of

 

2 RCA in 4 RCA out... Passive might suffice since it's low-level anyways and the imput impedance ought to be low since both the Martin Logans and the sub are active...

 

Lemme look.. ;)

post #4 of 9

http://www.audiogear.com/cgi-bin/shopper.cgi?key=ADPT-3RCFTGLD&preadd=action

 

What do people think? Should suffice right?

 

(One for each channel of course). I suggest using RCA-cables (either build yourself or buy) so they're mono (and not doubled/linked together)...


Edited by ValentinHogea - 6/23/12 at 8:54am
post #5 of 9
Thread Starter 

I was told I may need a line out converter. Ive looked at some but they are all made for cars. Does everyone who uses bookshelf speakers just live without a sub? All the small desktop amps ive looked at, lack a sub out. I would love to find a small 2.1 amp or even a 3.1 with center.

post #6 of 9
Thread Starter 

Does anyone know of a decent 2.1 receiver? I like the Cambridge Audio One+ receiver but its got a bunch of stuff I don't need and at $500+, im not interested in that kind of price.

post #7 of 9
Quote:
Originally Posted by M3Roc View Post

Does anyone know of a decent 2.1 receiver? I like the Cambridge Audio One+ receiver but its got a bunch of stuff I don't need and at $500+, I'm not interested in that kind of price.

Any receiver with an optical input should work.

Should be able to find a used receiver of Craigslist for $100.

Or eBay for $150

 

Personally I like Yamahas because they come with Silent Cinema, which is Yamahas surround sound for headphones.


Edited by PurpleAngel - 6/23/12 at 10:07am
post #8 of 9
Thread Starter 

Im trying to keep this as small as possible. I have a full size Yamaha receiver but I don't want that on my desk. I'm currently using an Topping TP30 desk amp. I like the Cambridge One+ because its also a small form factor. Does anyone know why these small amp's never include a sub-out? That's really all I need. My sub is powered and does not need power from the amp, only the signal.

post #9 of 9
Thread Starter 

OnePlus-with-speakers.jpg

This is the unit im speaking of. You can see the size in comparison to the ipod.

 

 

One-rear-shot.jpg

 

You can see that the rear has a sub out. I don't need something this elaborate but it would be nice to have the features.. 

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