So is a DIY a good idea for me? 5 channel HT - Page 2 - diyAudio
Go Back   Home > Forums > Amplifiers > Chip Amps

Chip Amps Amplifiers based on integrated circuits

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 8th September 2003, 09:54 PM   #11
diyAudio Member
 
Join Date: Dec 2002
Location: sarasota, fl
Okay my thought of the day... Get a Kenwood VR-7070 (about $330 on ebay) and just build an amp for the mains. Of course now I need to know how good the Kenwood works as a preamp I have a feeling the DAC is not the best.
  Reply With Quote
Old 8th September 2003, 10:27 PM   #12
JCoffey is offline JCoffey  United States
diyAudio Member
 
Join Date: May 2003
Location: Atlanta, GA
Or heres another thought. Use a pair of the Alesis bi-amps for sale on www.apexjr.com at $50 each,using the National chips 60W for the woofer, 40 for the tweeter, and intergrate them into your current speakers. Much cheaper, and the speakers they were got really good reviews from what I've seen.
  Reply With Quote
Old 8th September 2003, 10:56 PM   #13
r0cket- is offline r0cket-  United States
diyAudio Member
 
Join Date: Aug 2003
Location: Portland, OR
I would suggest buying a surround receiver with preamp outputs and DIYing yourself a nice pair of amps for the front left and right channels. The surround receiver then acts as a surround decoder/preamp and 3-channel amplifier, with your DIY amps covering the crucial 2 front channels. You should be able to find a suitable receiver for fairly cheap (say, $150-$250 or so), and while the amplifiers in it probably suck and the DSP/DAC probably isn't the greatest, it's a good tradeoff overall, since it would be much more expensive to buy a proper surround decoder, preamp, and materials for another 3 channels of amplification. Plus, you get video switching and a remote control and all that nifty stuff.
  Reply With Quote
Old 9th September 2003, 01:05 AM   #14
diyAudio Member
 
purplepeople's Avatar
 
Join Date: Mar 2003
Location: London, Ontario, Canada
You haven't said if you already have speakers or not so I've outline some options...

Sony DVP-NC685V has 5.1 analog output. Just add volume control, amplification and speakers.

Option 1
Try Cambridge Soundworks for powered systems that will plug into the back of the DVP.

Option 2
Make a 6-ch passive volume control using 6 pots as attenuators.
Use your sub-woofer
Get 5 Active monitors (suggest M-Audio BX5 and ESI nEAR-05 as cheap ones I've heard that aren't bad)

Option 3
Make a 6-ch passive volume control w/ 6 pots
Use your current sub
Get or build a 5-ch amp (suggest gainclone-type)
Get or build 5 speakers (suggest Yorkville YSM1 for mains)

Variations
a) Use your TV for centre channel and save one amp/speaker ch.
b) Use 3 stereo preamps of same model and get remote volume
c) Use full-range speakers for centre and surrounds with better quality mains so that stereo music sounds better without much compromise on HT.

:)ensen.
__________________
Those who claim to be making history are often the same ones repeating it.
  Reply With Quote
Old 9th September 2003, 01:26 AM   #15
diyAudio Member
 
Join Date: Dec 2002
Location: sarasota, fl
Just to clarify...I am already set speaker wise--I have a nice set of Polks RTA11ts as my mains. and good speakers all around.
  Reply With Quote
Old 9th September 2003, 01:42 AM   #16
diyAudio Member
 
Join Date: Dec 2002
Location: sarasota, fl
Quote:
Originally posted by r0cket-
while the amplifiers in it probably suck and the DSP/DAC probably isn't the greatest
Just woundering seeing that I have never been over to the digital part of the forum---How hard is a DIY DAC? Cost?
  Reply With Quote
Old 9th September 2003, 01:51 AM   #17
diyAudio Member
 
purplepeople's Avatar
 
Join Date: Mar 2003
Location: London, Ontario, Canada
So, all you need is surround speakers and 4-ch of amp for the least expensive route, assuming you use the TV for centre and get the DVP-NC685V.

The big decision is how you're going to do volume control. If you want cheap and simple, then forego the remote and build a passive attenuator. If you want a remote, the best value (without DIY) is to use 3 similar pre-amps so the remote can operate all simultaneously. The most unified and expensive is a 5.1 preamp. I believe Rowland makes an analog only pre-amp for (only!) around $750 USD.

Surround speakers and amplification. The simplest and cheapest is the nEAR-05 which is a bit bright sounding but probably good enough for surround speakers. If you want better, the YSM1 is pretty good for it's price and can be had passive or active. I believe the ART brand in the USA is a license of the Yorkville. Of course, you can really spend some money...

If you build your surrounds, just about anything that will do 120Hz-18kHz +/-3dB will suffice and even worse is passable. Surround is about fooling the brain and not necessarily about quality, although, of course, higher fi is going to sound better. Also, you'll amps for these and the Sansui could do nicely here.

As for amps for your mains, start by using your old Sansui (if you aren't using them in the surrounds). I've heard a few of them and they are pretty good for what they are. I'm surprised you already aren't using them. Which series xx00 or x01? If you build, start with the GCs as they are quite good sounding for the money. Most "small" active monitors use a version of the LM chip.

The problem with using the Alesis modules (or any other monitor module) is that they are intended to wire to your HF and LF separately. There is a lot of surgery just to make them full-range and it would be easier to start from scratch. The Polks are crossed at a freq to match the enclosure. If that is not the same as the Alesis bi-amps, there could be big problems with non-flat response or worse, bad cabinet resonances.

Good luck.

:)ensen.
__________________
Those who claim to be making history are often the same ones repeating it.
  Reply With Quote
Old 9th September 2003, 02:16 AM   #18
diyAudio Member
 
purplepeople's Avatar
 
Join Date: Mar 2003
Location: London, Ontario, Canada
Correction, the 5.1 analog preamp is YBA.

http://www.value-audio.com/hmthtre.htm

:)ensen.
__________________
Those who claim to be making history are often the same ones repeating it.
  Reply With Quote
Old 9th September 2003, 02:35 AM   #19
diyAudio Member
 
Join Date: Dec 2002
Location: sarasota, fl
Thanks, Right now the idea of a Cheap surround receiver with pre-outs stands out due to it's simplicity. However I really never heard anything about using a receiver as a pre-amp (esp a cheaper one like the Kenwood Vr-7070 (It is THX though)).
  Reply With Quote
Old 9th September 2003, 07:02 PM   #20
diyAudio Member
 
purplepeople's Avatar
 
Join Date: Mar 2003
Location: London, Ontario, Canada
I checked and if the specs for the Kenwood are true, it will probably make a decent amplifier for the surround channels only.

I guess the decision is what to keep in the signal path, what to keep out and what to add?

What equipment (brand and model) do you have right now? The Sansui? How about your DVD player?

:)ensen.
__________________
Those who claim to be making history are often the same ones repeating it.
  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
Idea for modifiying a center channel ccdoggy Multi-Way 8 26th June 2008 11:37 PM
Seems a good Diy idea !! sivan_and Everything Else 1 12th November 2006 07:44 AM
Centre Channel: Vifa...any Idea ?? ICARE Multi-Way 4 25th May 2005 10:50 AM
4 speakers, 2 channel amp, 1 crazy idea muskgrave Car Audio 31 6th April 2004 12:13 PM
thoughts on my center channel idea Zymrgy Multi-Way 5 19th January 2004 08:02 PM


New To Site? Need Help?

All times are GMT. The time now is 11:00 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