seeking advise for 5.1 HT using t-amp - diyAudio
Go Back   Home > Forums > Amplifiers > Class D

Class D Switching Power Amplifiers and Power D/A conversion

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 26th January 2009, 08:34 PM   #1
diyAudio Member
 
Join Date: Jul 2008
Default seeking advise for 5.1 HT using t-amp

The thread on the Psyclone Nodus PSP dock (Another Tripath Amp) gave me an idea to put together a 5.1 HT setup in the basement (mostly for the kids to watch movies and play games). I'd very much appreciate some advise.

1) Configuration: Well, the front L/R and rear L/R are easy. The problem is the center and the sub. As I understand it, the t-amps (at least most of them) can not be bridged further. I suppose I can build/find a powered sub not based on a tripath chip, but what can I do with the center channel?

2) This may be off-topic for this forum... I'm considering the Zaph fullrange based on the HiVi B3S for the "5" in 5.1, but am a bit concerned about the low sensitivity, especially given that I'll be using the relatively low power t-amp. Is my concern legit, or am I worrying too much?

3) Any suggestion on a good powered sub for this setup?

TIA for any comments/suggestions!
  Reply With Quote
Old 26th January 2009, 09:34 PM   #2
diyAudio Member
 
Saturnus's Avatar
 
Join Date: Jun 2005
Location: Copenhagen, Denmark
1) 2 options; either parallel the center channel or put the unused channel on a dummy load. A 32 Ohm 10 Watt resistor will work fine. Potentially you could later upgrade this by having a bi-amped speaker system. For example you could run all the front channels bi-amped with 4 t-amps with the last t-amp powerering the surround speakers.

2) HiVi B3S on t-amps? Forget that idea, right now! The 8 Ohms and 81 dB/W/m (that's eighty-one!) means the t-amp can't even push it to 90 dB peaks at a distance of one meter at full volume. In fact the speaker can only produce 96 dB absolute peaks. That's completely laughable.
  Reply With Quote
Old 26th January 2009, 09:43 PM   #3
diyAudio Member
 
Join Date: Feb 2006
Location: Chicago, IL
You could use two drivers for the center channel and power them with one Tripath channel each, but with the same signal (mono).

Those drivers are cheap enough you could run them in pairs, then you get four ohms, not eight, for a bit more power. I'm sure the kids would think the row of little drivers would look pretty cool.

You could also twiddle with the value of the coupling cap in the amps. If you select it a little higher than normal to block some of the really low frequencies (< 80hz?) the little speakers don't know what to do with, you could--theoretically--get more sound energy where it counts.

--Buckapound
  Reply With Quote
Old 27th January 2009, 05:40 PM   #4
diyAudio Member
 
Join Date: Jul 2008
Well, I guess the HiVi B3S isn't such a good match for t-amps...

If anyone has suggestions for better suited DIY speaker plans for this setup, I'd be very grateful. It looks like none of the cheaper designs on Zaphaudio is of suffcient sensitivity.

I probably should scoot over to the speaker forum for this. Will do that now. In any case, thanks for the advise about hooking up the center channel. That really helped clear my mind!
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
newbie seeking advise on Quad 606 caps compact7 Solid State 0 17th January 2008 12:53 PM
Seeking advise on sub using a TCsound 12&quot; sub arbourm Subwoofers 3 22nd September 2006 01:43 PM
Seeking advise for a preamp. S.C Solid State 0 12th April 2004 11:19 PM
Seeking advise on my EL34 amplifier arnoldc Tubes / Valves 6 31st January 2004 02:30 AM
Seeking advise on mosfet equivalents lukus404 Solid State 5 25th November 2003 10:27 AM


New To Site? Need Help?

All times are GMT. The time now is 12:13 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2