AudioAficionado.org  

Go Back   AudioAficionado.org > Manufacturers Forums > PMC Speakers

PMC Speakers UK's Finest

Reply
 
Thread Tools Display Modes
  #11  
Old 08-12-2018, 02:46 AM
Folkman Folkman is online now
Junior Member
 
Join Date: Jun 2018
Posts: 7
Default

Yes they are definitely 8 ohms.

I bought a new pair 2 months ago and was initially interested in either the IB2se or the MB2se. PMC themselves recommended the MB2se as they are an easier load for the amp.
Reply With Quote
  #12  
Old 08-12-2018, 03:19 AM
essjay's Avatar
essjay essjay is offline
Senior Member
 
Join Date: Aug 2012
Location: earth
Posts: 504
Default

the MB2S are 4ohm as well.
__________________
PMC MB2S-P| ARC REF 3 | AYRE MX-R| MSB ANALOG| KIMBER SELECT | SOLID TECH | THORENS 124MK2/ SME 3009
Reply With Quote
  #13  
Old 08-12-2018, 03:54 AM
Pyro's Avatar
Pyro Pyro is offline
Junior Aficionado
 
Join Date: Apr 2009
Location: Germany
Posts: 1,920
Default

Quote:
Originally Posted by adol290 View Post
Not sure if i understand your question.

The MB2's are 4 ohm. There is no selection on the bryston amps for 8 or 4 ohm.
My bad, I was unaware your amps do not have the ability to select the different impedance levels manually to match the speakers connected to them.

From the PMC manual, impedance for MB2SE is 8 ohms.

This is what I was asking.

Single Amp > HF_MF_LF = Impedance of 8 Ohms
Bi-Amp 1st Amp > LF = Impedance of ?
Bi-Amp 2nd Amp > MF_HF = Impedance of ?

I don't know the answer, that is why I am asking. It seems to me that you would have different impedance ratings when all three drivers (HF_MF_LF) are connected vs. two drivers connected (HF_MF) and one driver (LF) individually connected.

I sent an inquiry to my dealer.
__________________
2CH Room PMC MB2se(2) McIntosh C1000C/T, MDA1000, MC2301(2) Clearaudio Ovation/Magnify/Stradivariv2 HT Room PMC EB1i(2), CB6i, Twenty.21(2) JL Audio F113. McIntosh MX150, MC207. Misc PS Audio P10, P5. Wireworld Cables and Interconnects. Still Points Ultra 5, Ultra SS. GIK Acoustics Bass Traps. CAPS based Music and Video Server.

Last edited by Pyro; 08-12-2018 at 06:57 AM.
Reply With Quote
  #14  
Old 08-12-2018, 04:01 AM
Pyro's Avatar
Pyro Pyro is offline
Junior Aficionado
 
Join Date: Apr 2009
Location: Germany
Posts: 1,920
Default

Quote:
Originally Posted by essjay View Post
the MB2S are 4ohm as well.
According to the PMC website, the current MB2S have an Impedance of 8 Ohms.
__________________
2CH Room PMC MB2se(2) McIntosh C1000C/T, MDA1000, MC2301(2) Clearaudio Ovation/Magnify/Stradivariv2 HT Room PMC EB1i(2), CB6i, Twenty.21(2) JL Audio F113. McIntosh MX150, MC207. Misc PS Audio P10, P5. Wireworld Cables and Interconnects. Still Points Ultra 5, Ultra SS. GIK Acoustics Bass Traps. CAPS based Music and Video Server.

Last edited by Pyro; 08-12-2018 at 04:10 AM.
Reply With Quote
  #15  
Old 08-12-2018, 09:58 AM
adol290 adol290 is offline
Member
 
Join Date: Jul 2009
Location: Canada
Posts: 51
Default

Quote:
Originally Posted by Pyro View Post
It seems to me that you would have different impedance ratings when all three drivers (HF_MF_LF) are connected vs. two drivers connected (HF_MF) and one driver (LF) individually connected.

I sent an inquiry to my dealer.
Please post the results when you get them.
Reply With Quote
  #16  
Old 08-23-2018, 05:28 AM
Pyro's Avatar
Pyro Pyro is offline
Junior Aficionado
 
Join Date: Apr 2009
Location: Germany
Posts: 1,920
Default

Dealer said the impedance was the same.
__________________
2CH Room PMC MB2se(2) McIntosh C1000C/T, MDA1000, MC2301(2) Clearaudio Ovation/Magnify/Stradivariv2 HT Room PMC EB1i(2), CB6i, Twenty.21(2) JL Audio F113. McIntosh MX150, MC207. Misc PS Audio P10, P5. Wireworld Cables and Interconnects. Still Points Ultra 5, Ultra SS. GIK Acoustics Bass Traps. CAPS based Music and Video Server.
Reply With Quote
  #17  
Old 08-24-2018, 10:57 AM
Folkman Folkman is online now
Junior Member
 
Join Date: Jun 2018
Posts: 7
Default

Now I an no electronics engineer , but from reading I believe there is a change in impedance when splitting a crossover.

Apparently impedance specs are normally given with both high and low crossover networks and drivers connected together.

Usually when splitting the crossover , the mid/tweeter section will exhibit a higher impedance and the woofer section a lower impedance.
Reply With Quote
  #18  
Old 08-25-2018, 08:11 AM
essjay's Avatar
essjay essjay is offline
Senior Member
 
Join Date: Aug 2012
Location: earth
Posts: 504
Default

Quote:
Originally Posted by Pyro View Post
According to the PMC website, the current MB2S have an Impedance of 8 Ohms.
Hmm, guess i was wrong.
__________________
PMC MB2S-P| ARC REF 3 | AYRE MX-R| MSB ANALOG| KIMBER SELECT | SOLID TECH | THORENS 124MK2/ SME 3009
Reply With Quote
  #19  
Old 08-25-2018, 08:52 AM
Pyro's Avatar
Pyro Pyro is offline
Junior Aficionado
 
Join Date: Apr 2009
Location: Germany
Posts: 1,920
Default

Quote:
Originally Posted by adol290 View Post
I have a pair of PMC MB2 SE on order.

Or do a 7b3 on the bass and a 4B3 bridged on the midrange/tweeter.

I already have the 7b3's and 4b3 to do the bi-amp.
With this configuration, you will need an active crossover.

When doing some research on bi-amping, it was noted that using amps with different gains/sensitivity will unbalance the intended sound of the speaker and therefore an active crossover was necessary.

or

Use the same style amp for each of the feeds; Bass and Mids_Tweets.

This was interesting.

https://pmc-speakers.com/technology/crossovers
__________________
2CH Room PMC MB2se(2) McIntosh C1000C/T, MDA1000, MC2301(2) Clearaudio Ovation/Magnify/Stradivariv2 HT Room PMC EB1i(2), CB6i, Twenty.21(2) JL Audio F113. McIntosh MX150, MC207. Misc PS Audio P10, P5. Wireworld Cables and Interconnects. Still Points Ultra 5, Ultra SS. GIK Acoustics Bass Traps. CAPS based Music and Video Server.
Reply With Quote
  #20  
Old 08-25-2018, 01:18 PM
adol290 adol290 is offline
Member
 
Join Date: Jul 2009
Location: Canada
Posts: 51
Default

Quote:
Originally Posted by Pyro View Post
With this configuration, you will need an active crossover.

When doing some research on bi-amping, it was noted that using amps with different gains/sensitivity will unbalance the intended sound of the speaker and therefore an active crossover was necessary.

or

Use the same style amp for each of the feeds; Bass and Mids_Tweets.

This was interesting.

https://pmc-speakers.com/technology/crossovers

The bryston amps have a selectable gain switch, so they can be all set to the same gain, so it can be done without the crossover.

That is an interesting article, but they talk about the fact speaker crossover.
I assume(hope) the same care is taken for the MB2SE speakers also.

I had a pair of IB2i Actives and had to replace the boards 3 times.
Reply With Quote
Reply

Thread Tools
Display Modes

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

Forum Jump

Audioaficionado.org tested by Norton Internet Security

All times are GMT -4. The time now is 09:48 PM.



Powered by vBulletin® Version 3.8.10
Copyright ©2000 - 2018, vBulletin Solutions, Inc.
ęCopyright 2009-2018 AudioAficionado.org.Privately owned, All Rights Reserved.
Audio Aficionado Sponsors
AudioAficionado Subscriber
AudioAficionado Subscriber
Fortress
Fortress
Harmonic Resolution Systems
Harmonic Resolution Systems
Wyred4Sound
Wyred4Sound
Dragonfire Acoustics
Dragonfire Acoustics
GIK Acoustics
GIK Acoustics
Esoteric
Esoteric
AC Infinity
AC Infinity
JL Audio
JL Audio
Acoustic Sciences Corportation
Acoustic Sciences Corportation
Legend Audio & Video
Legend Audio & Video
Audio by E
Audio by E
Canton
Canton
Bryston
Bryston
WireWorld Cables
WireWorld Cables
Stillpoints
Stillpoints
Bricasti Design
Bricasti Design
Furutech
Furutech
Shunyata Research
Shunyata Research
Accuphase
Accuphase