Anyone have any thoughts on running an A23 mono with a 6 ohm center channel? I know that Parasound suggests that it not be done. Thanks in advance.
Running A23 mono
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Originally posted by mdw_tpaAnyone have any thoughts on running an A23 mono with a 6 ohm center channel? I know that Parasound suggests that it not be done. Thanks in advance.
good luck
Vince- Bottom
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Originally posted by Vince HelmI am using an A23 in mono with a NHT SB3 as the center. It is rated at 8 ohms but dips into the 6 ohm range. Works great, amp does not get very hot nor has it ever overheated.
Peter- Bottom
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Just curious. . . do any of you guys think I may CONSIDERABLY reduce the life of a Halo A51 by using it to drive a 4 ohm load,the sensitivity is claimed to be 92 db @1w/meter (these specs are for all channels). . .my amp does run hot. . .especially when I give it a thorough workout!!!!!! :B- Bottom
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Originally posted by marcusJust curious. . . do any of you guys think I may CONSIDERABLY reduce the life of a Halo A51 by using it to drive a 4 ohm load,the sensitivity is claimed to be 92 db @1w/meter (these specs are for all channels). . .my amp does run hot. . .especially when I give it a thorough workout!!!!!! :BLast edited by r100gs; 07 December 2006, 09:34 Thursday.Jay- Bottom
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Originally posted by marcusJust curious. . . do any of you guys think I may CONSIDERABLY reduce the life of a Halo A51 by using it to drive a 4 ohm load,the sensitivity is claimed to be 92 db @1w/meter (these specs are for all channels). . .my amp does run hot. . .especially when I give it a thorough workout!!!!!! :B
I ran my A51 with five power hungry 4 ohm loads (85db/1W/1m) without problems or damage to the amp. (When you're pushing the amp to the limit, the A21 excels. However, at moderate power levels the difference between the amps is subtle).
Peter- Bottom
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This might be a elementary question, but I don't know the answer. I have B&W with 2 sets of posts. If I bi-amp the speakers using a A23 I assume I would connect one channel to one set of posts, and the other channel to the second set. The active cross over would be installed between the pre-amp and amp correct? I already run 2 sets of speaker cables to each speaker from the amp.
My confusion is the speakers are already designed to filter out unwanted frequencies by the crossover inside the speakers, so the active crossover would have to match the frequencies of the passive crossover inside the speakers so I don't create a hole in the frequency response. So I would be filtering the same frequencies twice. Is the advantage the amp only has to amplify a smaller range of frequencies? Is this really an advantage to just using a splitter to feed the same signal to both channels of the amp?- Bottom
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Originally posted by Pookie007My confusion is the speakers are already designed to filter out unwanted frequencies by the crossover inside the speakers
What you're doing in this case is called "passive bi-amping".
Originally posted by Pookie007so the active crossover would have to match the frequencies of the passive crossover inside the speakers so I don't create a hole in the frequency response.
The big advantage of this is that you can remove the passive crossover which is often of dubious quality. (Even expensive speakers like the $13k Magnepan 20.1s benefit from removing the passive crossover. Magnepan knows this and houses the woofer/midrange XO in an external box so that it is easily removed by the owner).
Since your speakers already allow for bi-amping, the woofer XO can probably simply be removed/bypassed. However, assuming your speakers are 3-way, your midrange/tweeter XO needs to be modified. You will want to remove/bypass the woofer/midrange XO and still keep the midrage/tweeter XO in place. The latter has to stay, unless you want to go with tri-amping :B
B&W speakers are extremely popular, so I'm sure you'll be able to find other owners that have modified the internal XO and can help you with the specifics...
Peter- Bottom
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Thanks for the info Peter. Your reply has just convinced me I do not want to bi-amp my speakers. I am still feeling the pain in my wallet from purchasing them. I think I will stick with bridging one to mono for the center, and run the second in stereo for the surrounds. I have an Audio Research for the mains and I am very happy with it.- Bottom
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Originally posted by Pookie007Thanks for the info Peter. Your reply has just convinced me I do not want to bi-amp my speakers. I am still feeling the pain in my wallet from purchasing them. I think I will stick with bridging one to mono for the center, and run the second in stereo for the surrounds. I have an Audio Research for the mains and I am very happy with it.
Peter- Bottom
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Yes, I have the option to passive bi-amp the center. Or I can leave the jumpers in and run the amp mono. Running the amp mono is a little cheaper option because I won't have to buy another set of speaker cables, but if this causes unnecessary strain on the amp, they might be a wise investment.- Bottom
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My wife might not let me continue to live here, but since bridging the amps wasn't an issue, the A23s were not as appealing. I took the day off work and pulled the trigger on two Audio Research 150.2 amps. They were showroom units and I got a smoking deal on them. I connected one to the center (passive bi-amping) and used the other for the surrounds. I already had a 300.2 on the mains. I am going to move my Halo A23 to a 2 channel system in another room. Now I just need a new pre-amps with balanced outputs for both systems. Hopefully the tax refund will cover Halo C2 for the main system. I don't see any advantages to a C1 with my setup.
Does the C1 give some advantage over the C2 I should consider? I will never need the display on the unit since it is in the same room with my screen.- Bottom
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Originally posted by Pookie007Does the C1 give some advantage over the C2 I should consider? I will never need the display on the unit since it is in the same room with my screen.
Peter- Bottom
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I use an external scaler, so the extra video input won't benefit me. I am going to try and do side-by-side comparisons with the Arcam, Rotel, Krell, and Parasound Halo. I put this post in a different forum that is more appropriate. I didn't want to hijack this thread.- Bottom
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