Spawn of Frugel-Horn - Page 52 - diyAudio
Go Back   Home > Forums > Loudspeakers > Full Range

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 22nd April 2007, 09:12 PM   #511
diyAudio Member
 
Join Date: Aug 2006
Location: MN, USA
Send a message via Yahoo to brucedal1
I just can't belive how you guys (scottmoose and GM) are able to hear my poorly described problems and immediately identify the cause. I definately was the bookshelf amp. I borrowed a heavier duty amp from my brother and it was unbeleiveable the difference that it made!!
These things are powerful!! Even my girlfriend likes the sound. Plenty loud enough to annoy all in the house But, as I won't be able to use this amp forever, I could get my own pro-amp for it, or save up for a tube amp.
BTW, this is as off topic as I'll take this What amp might work well for Bruce using a Bruce!

Thanks,
Bruce
  Reply With Quote
Old 22nd April 2007, 09:38 PM   #512
frugal-phile(tm)
diyAudio Moderator
 
planet10's Avatar
 
Join Date: Oct 2001
Location: Victoria, BC, NA, Sol III
Blog Entries: 5
Quote:
Originally posted by brucedal1
What amp might work well for Bruce using a Bruce!
Unless you listen thunderously loud one of the small digital amps might well be one of the best, off-the-shelf solutions. Otherwise a Frugal-phile(tm) build of an RH84 or an El Cheapo... of course if you have more budget a lot more options become available.

I understand this one is decent

http://www.trendsaudio.com/EN/Product/TA-10_desc.htm

http://www.6moons.com/audioreviews/trends/ta10.html

dave
__________________
community sites t-linespeakers.org, frugal-horn.com, frugal-phile.com ........ commercial site planet10-HiFi
p10-hifi forum here at diyA
  Reply With Quote
Old 23rd April 2007, 06:08 AM   #513
GM is offline GM  United States
diyAudio Member
 
GM's Avatar
 
Join Date: Jun 2003
Location: Chamblee, Ga.
Quote:
Originally posted by brucedal1
I just can't belive how you guys (scottmoose and GM) are able to hear my poorly described problems and immediately identify the cause.

I could get my own pro-amp for it, or save up for a tube amp.
BTW, this is as off topic as I'll take this What amp might work well for Bruce using a Bruce!
Greets!

Yours was a common newbie problem.........

Unless it's a Crown studio/recording series or similar ($$$), steer clear of prosound amps for wide BW use as they aren't designed with high sound quality (SQ) in mind.

Since you're having to use considerable series resistance to flatten its response, you need an amp with a power rating at a nominal impedance high enough to handle it, or ~16 ohms in your case if you don't want it to possibly 'lay down' due to not enough voltage swing when there's significant LF content in the recording. This makes any of the chip amps I've seen specs of suspect IMO, so Caveat Emptor.

GM
__________________
Loud is Beautiful if it's Clean! As always though, the usual disclaimers apply to this post's contents.
  Reply With Quote
Old 23rd April 2007, 06:58 AM   #514
diyAudio Member
 
Scottmoose's Avatar
 
Join Date: Mar 2005
Location: UK
I reckon he might be OK Greg -a fair proportion of the series resistance is probably due to the lack of amp adjustment to Qt (I'm learning... ). Most T-amps have a relatively low DF IIRC, so the T-amp's lack of voltage swinging ability might not be too much of a problem. I'm no expert though as you know, so please put me straight if I'm off the mark on this.
__________________
Community site www.frugal-horn.com Commercial site www.wodendesign.com
  Reply With Quote
Old 23rd April 2007, 04:23 PM   #515
diyAudio Member
 
Join Date: Aug 2006
Location: MN, USA
Send a message via Yahoo to brucedal1
The 8 ohms was just the smallest resistor I had on hand. (and the only one not 1/4 watt)

I hardly know anything!! I just read what you guys "in the know" say and do it. The theory seems to stick and I try to put it into my own practice (like my failed "cheapo" bibs) then, I just say "BAH, I'll use the know quantity and tweak it if necessary" So from my end a big thanks to all those who know and share!

Bruce
  Reply With Quote
Old 27th April 2007, 06:46 PM   #516
diyAudio Member
 
Join Date: Jun 2005
Location: Tri-Cities TN
Default Sachiko and FE208E Sigma + supertweeter

Anyone built a Sachiko so far?

I'm looking for a very high eff speaker so the 8" driver stood out. I know some of the other 8" drivers don't HAVE to have a tweeter, but I want sparkle so I'm already commited to one anyway (my main system uses ribbons so I'm afraid I'd miss their extension). I've also read the sigmas have a very good midrange so that is why I was considering the FE208EZ first. Of course I'm open to other driver suggestions too.

From what I interpreted earlier it sounds like the Sachiko is a better fit for that driver because Bruce is more of a BR design so it wants a higher qts.

Any modifications needed to use that driver in that cabinet?

Where is the best place to mount the tweeter. Can't use the top like the stock cabinets. Attach it to the side or steal a bit of the baffle? If you used the baffle would the tweeter take enough airspace to need to tweak those dimensions?

Thanks for the detailed plans! The cut plan is a great touch.

Jeremy
  Reply With Quote
Old 27th April 2007, 08:37 PM   #517
frugal-phile(tm)
diyAudio Moderator
 
planet10's Avatar
 
Join Date: Oct 2001
Location: Victoria, BC, NA, Sol III
Blog Entries: 5
Default Re: Sachiko and FE208E Sigma + supertweeter

Quote:
Originally posted by samplesj
Where is the best place to mount the tweeter.
I'd look at using one of the baffle mounted tweeters -- we are playing with FT17 ATM.

dave
__________________
community sites t-linespeakers.org, frugal-horn.com, frugal-phile.com ........ commercial site planet10-HiFi
p10-hifi forum here at diyA
  Reply With Quote
Old 27th April 2007, 09:38 PM   #518
diyAudio Member
 
Join Date: Jun 2005
Location: Tri-Cities TN
Default Re: Re: Sachiko and FE208E Sigma + supertweeter

Quote:
Originally posted by planet10

I'd look at using one of the baffle mounted tweeters -- we are playing with FT17 ATM.
Thanks!

I can see how that is much easier than dealing with the pod style. The FT17 isn't as much either. It looks to be a good match in efficency. I'm sure with a bit of playing around I can find the right crossover cap value. I know this is the Full Range forum so that is heresy, but I just want high eff.

It won't fit directly above the bigger driver, but if I put it diagonally to one side it should fix fine.

After calculating the driver baffle area vs the area the tweeter takes up I see its only a bit over 1% of the space so I guess its just noise.

Its a shame the AC ribbons are so much $ and so much bigger.
  Reply With Quote
Old 27th April 2007, 09:56 PM   #519
frugal-phile(tm)
diyAudio Moderator
 
planet10's Avatar
 
Join Date: Oct 2001
Location: Victoria, BC, NA, Sol III
Blog Entries: 5
Default Re: Re: Re: Sachiko and FE208E Sigma + supertweeter

Quote:
Originally posted by samplesj
Its a shame the AC ribbons are so much $ and so much bigger.
And a good chance they won't work as well (i have a pair of those too)

dave
__________________
community sites t-linespeakers.org, frugal-horn.com, frugal-phile.com ........ commercial site planet10-HiFi
p10-hifi forum here at diyA
  Reply With Quote
Old 30th April 2007, 02:22 PM   #520
badman is offline badman  United States
diyAudio Member
 
badman's Avatar
 
Join Date: Sep 2003
Location: Sunny Tustin, SoCal
Quote:
Originally posted by Scottmoose
I reckon he might be OK Greg -a fair proportion of the series resistance is probably due to the lack of amp adjustment to Qt (I'm learning... ). Most T-amps have a relatively low DF IIRC, so the T-amp's lack of voltage swinging ability might not be too much of a problem. I'm no expert though as you know, so please put me straight if I'm off the mark on this.

The damping factor of your average class D amp is pretty decent, but decreases with increasing frequency due to the typical LC network for keeping RF out of your speaker. Funny... most speakers have increasing impedance with increasing frequency anyway.... perhaps this actually leads to a more consistent damping factor over the load vs. a frequency constant DF.....
__________________
I write for www.enjoythemusic.com in the DIY section. You may find yourself getting a preview of a project in-progress. Be warned!
  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



New To Site? Need Help?

All times are GMT. The time now is 07:28 AM.


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