View Full Version : Bi-amping. Which way?
Toying vaguely with the idea of bi-amping my Mission 782s using a pre-amp and two identical two channel power amps, I'm wondering which way to set the system up. Should I use one power amp per speaker, using one channel for bass and one for mid and top, or should I use one for left and right bass and one for left and right mid and top?
The obvious answer is suck it and see, but I'd be interested to hear others' experiences and theories.
Cant tell you what amps I'm hoping to use yet.....
Arkless Electronics
24-11-2016, 20:04
There is no right or wrong way.... But personally I would use one amp for the bass, at least then the other amp is almost doing nothing and so can drive the tweeters without any "interference" from the heavy load of the bass. The "better" the amps the less it will matter.
Lawrence001
24-11-2016, 20:10
The usual advice to use one amp for treble and one for bass has I think been based on having an integrated with a second (power) amp added. The latter is usually used for bass as (if it has the same size power supply) it has more "oomph" (technical term).
If I were using 2 power amps I would consider one for left and one for right. Ideally they would be positioned next to the speakers as it's better to use long interconnects than speaker wire (so Noel Keywood said in hifi world I'm interested to know why).
Even if they are kept in the rack I think it's better to go L/R as then the power supply is more evenly split than one doing bass (which would demand more power) and one treble. I haven't considered any possible negative affects from crosstalk between the different frequencies in the same amp as I don't know if that matters.
Someone else please chime in if I'm completely wrong here.
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To some extent it depend if the two amplifiers are identical or not as to whether you 'horizontally' or 'vertically' bi-amp.
This might be of some help: http://theartofsound.net/forum/showthread.php?5818-Basics-amp-General-Bi-amping-and-Bi-wiring .
Stryder5
24-11-2016, 20:13
One for base one for treble left/left right/right, that's how I have done mine. Certainly made an improvement.
The unbelievers and measurers will be along soon though no doubt......lol.
Arkless Electronics
24-11-2016, 20:15
They should ideally be identical.
One for base one for treble left/left right/right, that's how I have done mine. Certainly made an improvement.
The unbelievers and measurers will be along soon though no doubt......lol.
So vertical bi-amping: one two-channel amplifier per speaker?
Stryder5
24-11-2016, 22:05
So vertical bi-amping: one two-channel amplifier per speaker?
Sorry if I was unclear, one amp for bass and one for treble.
If it happens, it'll be with two identical power amps, each of which on its own would be able to drive the Missions to their limits without really breaking a sweat. I'm leaning towards one amp for bass and one for mid/top, but I also like the idea of using short speaker leads.
We'll see what happens.
Sorry if I was unclear, one amp for bass and one for treble.
OK What you are doing is known as horizontal bi-amping.
If it happens, it'll be with two identical power amps, each of which on its own would be able to drive the Missions to their limits without really breaking a sweat. I'm leaning towards one amp for bass and one for mid/top, but I also like the idea of using short speaker leads.
We'll see what happens.
Have you looked at the link I gave?
Confused here.
Is? this biamping using Line level (either active or passive) crossovers Betwixt Pre (or whatever) and 2 Amps?
Or simply a Variant on Bi wiring ( two amps rather than one)?
The terminology often implies one, yet means the other.
Not going to happen now ��. Withdrawn from sale.
https://www.ebay.co.uk/itm/322331287102
https://www.ebay.co.uk/itm/322331232912
Confused here.
Is? this biamping using Line level (either active or passive) crossovers Betwixt Pre (or whatever) and 2 Amps?
Or simply a Variant on Bi wiring ( two amps rather than one)?
The terminology often implies one, yet means the other.
"Bi-amping" (i.e. using two amplifiers) is clearly not the same a "bi-wiring" (i.e. using two sets of speaker wires).
Again having a look at the link I gave will, I hope, make matters clearer.
Tried biwiring and found little difference. Bi amping can under some circumstances give benefits imv. Can also make things worse too. Running stereo amps in mono changes things and not always for better. Still it looks good.
RothwellAudio
25-11-2016, 12:44
Running stereo amps in mono changes things and not always for better.
Biamping with two stereo amps doesn't mean the amps are running in mono though, does it?
Anyway, you could eliminate the confusion of choice by using 4 monoblocks :)
Arkless Electronics
25-11-2016, 12:48
Tried biwiring and found little difference. Bi amping can under some circumstances give benefits imv. Can also make things worse too. Running stereo amps in mono changes things and not always for better. Still it looks good.
It can have advantages....
Lawrence001
26-11-2016, 00:24
Not going to happen now ��. Withdrawn from sale.
https://www.ebay.co.uk/itm/322331287102
https://www.ebay.co.uk/itm/322331232912
Try offering a bit over £200 on these and you'll have a nice pre/power pair for not much
http://m.ebay.co.uk/itm/MYRYAD-T50-Pre-AMPLIFIER-and-MYRYAD-T70-Power-AMPLIFIER-MYRYAD-COMBO-PRE-POWER-/282265267498?_trkparms=aid%253D222007%2526algo%253 DSIC.MBE%2526ao%253D1%2526asc%253D20150519202351%2 526meid%253Dc7a57bf1c7c34e1da1e4d94f328a3cfa%2526p id%253D100408%2526rk%253D7%2526rkt%253D25%2526sd%2 53D282266311817&_trksid=p2056116.c100408.m2460
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