Canuck Audio Mart Hifi and Audio ForumCanuck Audio Mart Hifi and Audio Forum
It is currently Wed Oct 17, 2018 1:07 am

All times are UTC - 8 hours




Post new topic Reply to topic  [ 31 posts ]  Go to page 1, 2, 3  Next
Author Message
 Post subject: Can this Amp be Bi-Wired
PostPosted: Mon Oct 01, 2018 6:49 pm 
Offline

Joined: Fri Jan 16, 2009 2:23 pm
Posts: 2
Location: London, ON, CA
Hi guys
I have a Stellar Labs SLA 250 Amp I’m giving to my 16yr old son and want to know if this amp can be bi-wired
I have added a photo for people to view and explain how to do this if possible


Attachments:
File comment: 2 sets of speaker outputs
244C5BDF-5207-496F-9E8E-A2B7DD9563E6.png
244C5BDF-5207-496F-9E8E-A2B7DD9563E6.png [ 526.43 KiB | Viewed 1000 times ]
Top
 Profile  
Reply with quote  
PostPosted: Mon Oct 01, 2018 7:06 pm 
Offline

Joined: Sat Sep 01, 2012 5:08 am
Posts: 699
Location: Montréal, QC, CA
Yes it can, you just have to respect the impedance recommendation on the manual when using A+B.

_________________
Keep things simple and even simpler
Nakamichi BX-300/Balance BW-1010 DAC, Balance MR-50R, Infinity RS 8 Kappa
Nakamichi Dragon/Onix Dac25b, Audio Research SP-9, Spectral DMA-100s/Nakamichi PA-7II, Martin-Logan CLSII/Balance Helicia


Top
 Profile  
Reply with quote  
PostPosted: Mon Oct 01, 2018 7:23 pm 
Offline
User avatar

Joined: Wed Jul 23, 2008 5:04 pm
Posts: 2467
Location: saskatoon, SK, CA
Wouldn't the amp see the same impedance?

We're biwiring not biamping.

_________________
You like that Redgren Grumbholdt reference? Yeah. Well, guess what? I made him up. You really are your father's children. Think for yourselves. Don't be sheep.


Top
 Profile  
Reply with quote  
PostPosted: Tue Oct 02, 2018 4:05 am 
Offline
User avatar

Joined: Wed Oct 10, 2012 10:07 am
Posts: 300
Location: Repentigny, QC, CA
Yes, it can be bi-wired. Might even be better like that.
See: https://www.qacoustics.co.uk/blog/2016/ ... -benefits/

_________________
Death is not the greatest loss in life. The greatest loss is what dies inside us while we live. Norman Cousins


Top
 Profile  
Reply with quote  
PostPosted: Tue Oct 02, 2018 4:26 am 
Offline
User avatar

Joined: Tue Dec 07, 2004 4:18 pm
Posts: 2814
Location: GTA, ON, CA
As previously mentioned, yes, as per the manual

A/B Speaker Selector
Each A and B pushbutton operates independently. Pressing the button in will engage the speaker pair for the designated output. Pressing again will disengage that output. With both pairs on, the speaker outputs are parallel.


Top
 Profile  
Reply with quote  
PostPosted: Tue Oct 02, 2018 4:37 am 
Offline
User avatar

Joined: Wed Jul 23, 2008 5:04 pm
Posts: 2467
Location: saskatoon, SK, CA
natedog wrote:
Yes, it can be bi-wired. Might even be better like that.
See: https://www.qacoustics.co.uk/blog/2016/ ... -benefits/


That's a big might imo...

_________________
You like that Redgren Grumbholdt reference? Yeah. Well, guess what? I made him up. You really are your father's children. Think for yourselves. Don't be sheep.


Top
 Profile  
Reply with quote  
PostPosted: Tue Oct 02, 2018 5:08 am 
Offline
User avatar

Joined: Fri Jul 29, 2005 6:29 pm
Posts: 380
Location: Burlington, ON, CA
I tried to bi-wire a pair of speakers many years ago, using the A and B speakers connections on an Arcam FMJ A32 integrated amp, and the amp shut down due to its overload protection ... I assume that the impedance had fallen to less than 4 ohms


Top
 Profile  
Reply with quote  
PostPosted: Tue Oct 02, 2018 5:23 am 
Offline
User avatar

Joined: Thu Aug 18, 2005 3:44 pm
Posts: 720
Location: Repentigny, QC, CA
To Phil,
You shorted the amp output if the links are there and reversed plus and minus wires?
Or you just might have forgot to remove the jumpers that bridges upper and lower speakers connections at the speakers
connection posts.

To OP,

But in fact it is the speakers connections that are bi-wired. As such, both lower and upper speakers posts refereed to the amplifier output
single speakers posts, this is to obtain lower impedance paths; (tweeter/mds section are less affected by woofer back EMF: considering your amp have very low output impedance or high damping factor).
Of course this is always amp/speaker matching and if you can discern an improvement by doing bi wiring.


Top
 Profile  
Reply with quote  
PostPosted: Tue Oct 02, 2018 5:40 am 
Offline

Joined: Tue Mar 20, 2012 11:02 am
Posts: 278
Location: Milton, ON, CA
BigBill6778,

Bi-wiring can be done with any amp as long as your speakers are bi-wireable [Speakers have high and low posts]

I believe you're wanting to bi-amp using 2 pairs of speaker outputs. It can be done but with caution. As it is for your 16 year old son I would advise against it.

Google bi-wiring Vs. bi-amping.

Audiois1st

_________________
Digital Front End > Stereo & Multi-Channel > Tubes > B&W & Cerwin Vega Speakers > Acoustically Treated A/V Cave

Check out My Streams: http://www.canuckaudiomart.com/userprofile.php?user_id=39933


Top
 Profile  
Reply with quote  
PostPosted: Tue Oct 02, 2018 5:42 am 
Offline

Joined: Thu Jan 13, 2011 11:29 am
Posts: 775
Location: St.Catharines, ON, CA
A visual aid might help.

G


Attachments:
sOEi557V.png
sOEi557V.png [ 187.66 KiB | Viewed 782 times ]
Top
 Profile  
Reply with quote  
PostPosted: Tue Oct 02, 2018 6:15 am 
Offline
User avatar

Joined: Fri Jul 29, 2005 6:29 pm
Posts: 380
Location: Burlington, ON, CA
revoxb77 wrote:
To Phil,
You shorted the amp output if the links are there and reversed plus and minus wires?
Or you just might have forgot to remove the jumpers that bridges upper and lower speakers connections at the speakers
connection posts.
.


No, I definitely did not reverse the plus and minus (red and black) wires, and the jumpers were definitely not in place on the speakers ... reading the Arcam A32 manual on line a few minutes ago, it cautions against bi-wiring using the A and B speaker post on the amp because indeed it can fall below 4 ohms and set off the protection circuit .... and that is what happened ... so I guess it depends on the particular speaker being bi-wired


Top
 Profile  
Reply with quote  
PostPosted: Tue Oct 02, 2018 9:50 am 
Offline
User avatar

Joined: Mon Mar 31, 2008 9:17 am
Posts: 14983
Location: Toronto, ON, CA
Phil Jones wrote:
revoxb77 wrote:
To Phil,
You shorted the amp output if the links are there and reversed plus and minus wires?
Or you just might have forgot to remove the jumpers that bridges upper and lower speakers connections at the speakers
connection posts.
.


No, I definitely did not reverse the plus and minus (red and black) wires, and the jumpers were definitely not in place on the speakers ... reading the Arcam A32 manual on line a few minutes ago, it cautions against bi-wiring using the A and B speaker post on the amp because indeed it can fall below 4 ohms and set off the protection circuit .... and that is what happened ... so I guess it depends on the particular speaker being bi-wired
Curious. I can see an additional pair causing this, but not just the one.

_________________
To a hammer, everything looks like a nail


Top
 Profile  
Reply with quote  
PostPosted: Tue Oct 02, 2018 1:24 pm 
Offline
User avatar

Joined: Thu Aug 18, 2005 3:44 pm
Posts: 720
Location: Repentigny, QC, CA
Protection would trigger on 2 pairs of 4 ohms speakers causing 2 ohms load.
Or a pair of 4 ohms and an 8 ohms giving 2,67 ohms again a bit too much.


Top
 Profile  
Reply with quote  
PostPosted: Wed Oct 10, 2018 2:25 pm 
Offline

Joined: Mon May 23, 2016 1:19 pm
Posts: 412
Location: Mississauga, ON, CA
Bi-wireing is only benefitting cable manufacturers. Bi-amping is whole another thing which can have substantial sonic benefits IF used with crossover before power amps.


Top
 Profile  
Reply with quote  
PostPosted: Wed Oct 10, 2018 2:43 pm 
Offline
User avatar

Joined: Wed Jul 23, 2008 5:04 pm
Posts: 2467
Location: saskatoon, SK, CA
And we thank you for your opinion.

_________________
You like that Redgren Grumbholdt reference? Yeah. Well, guess what? I made him up. You really are your father's children. Think for yourselves. Don't be sheep.


Top
 Profile  
Reply with quote  
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 31 posts ]  Go to page 1, 2, 3  Next

All times are UTC - 8 hours


Who is online

Users browsing this forum: No registered users and 2 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB® Forum Software © phpBB Group