|
Post by DavidR on Mar 16, 2019 12:07:57 GMT -5
Bi-amp
|
|
|
Post by leonski on Mar 16, 2019 20:34:53 GMT -5
Boy Boltman, LOW sensitivity aint' the half of it! Wow, even less sensitive than my Magnepans..... www.stereophile.com/content/mirage-m-7si-loudspeaker-measurementsStereophile says to take the 50 watt minimum seriously. And at least double it. I'g going to stand by the PA-1 as being reasonable for this speaker. If you LIKE the Adcom? The 555 (original model) is a PASS design and is pretty good. The Mark II version might not be QUITE as good, but is still a vintage contender.
|
|
|
Post by leonski on Mar 17, 2019 15:03:39 GMT -5
I don't want to go the digital amp route. 'D' amps are NOT DIGITAL. They have NO A/D or D/A conversion. It is an an analogue circuit thruout. Except for POTENTIAL digital circuitry which is not part of the B&O designs. They are, I guess, high speed switching amps with the outputs either 'on' or 'off', being switched at a very high frequency. The output is than put thru a low-pass filter to get rid of the switching artifacts. By all reports, 'D' amps seem to be improving at a fairly rapid clip. NCore gets good reviews as do the latest B&O offerings.
|
|
|
Post by boltman on Mar 27, 2019 14:49:07 GMT -5
People continue to refer to 'speaker watts' as if they HAD them. Speakers do not have watts. And unless the manufacturer is more forthcoming about HOW that measure was taken, presuming they are in some fashion referring to 'Maximum Power Handling' than I'd simply ignore the number and go by Sensitivity and try to find out how bad a load the speaker is, by some measure of reactance. Stereophile takes this data in the current speaker reviews. As for a new amp? The Adcom @60 watts was 'decent'. Ok, where was the lack? High levels? Poor musicality? Bad pace or rhythm to the presentation? I personally would do Nothing Less than DOUBLE the existing power. That's 3db and will make a reasonable difference. All other things being equal, which the Never Are. I'm going to sound like a broken record here, but those PA-1 monoblocks are a kick for the 300$ each. I don't think I'll regret saying that, either.......... The Adcom sounds very nice indeed actually. It does not have enough juice to run my McCormack MLD in passive mode. Instead, I set the MLD in it's highest gain option (12db). My previous amp was a NAD 216 at 120wpc and it sounded glorious with a passive signal. Thus my search for a second amp. I'm going to keep the Adcom as well. It is in beautiful shape for a 30 year old amp. I wonder if Emotiva is made as well? As for the class D recommendation, looks interesting but my pre does not have balanced outputs. Thanks!
|
|
|
Post by boltman on Mar 27, 2019 15:19:57 GMT -5
Boy Boltman, LOW sensitivity aint' the half of it! Wow, even less sensitive than my Magnepans..... www.stereophile.com/content/mirage-m-7si-loudspeaker-measurementsStereophile says to take the 50 watt minimum seriously. And at least double it. I'g going to stand by the PA-1 as being reasonable for this speaker. If you LIKE the Adcom? The 555 (original model) is a PASS design and is pretty good. The Mark II version might not be QUITE as good, but is still a vintage contender. So looking at your system, I see some nice Parasound amps on there! My budget is basically $600-$900, but would love to spend less. The Parasound Classic 275v2 is interesting (slim profile, 90wpc/150wpc 4 ohms). Also has two sets of speakers outputs which is nice. Pretty cool looking amp for $500. Other contenders are Emotiva A-500(So I can at least expand to 5 channels in the future) and the Adcom GFA-555ms (new model, $900). Of course, the Adcom fan base in another group/forum is telling me Emotiva doesn't match Adcom in build quality or sound quality.....predictable I guess.
|
|
|
Post by 405x5 on Mar 27, 2019 21:04:46 GMT -5
Still finishing up a new system for music only (PT-100, CD-100, Airmotiv T1's) I only need to acquire the amp now. I have been debating the A-150 Vs A-300. My room is very small 14X14 with hardwood floors. I am still on the fence about the A-300 fan noise as my listening position is not far from the electronics.....So I am thinking A-150 now and then add a second A-150 so I can bi-amp the T1's. Any thoughts? Overkill in that room size for sure. Biamping has been here for decades (. 40 years since I first encountered it). Unless a loudspeaker system is designed specifically to be biamped, usually with an active crossover, there is nothing sonically to be gained, The most important thing about amplifier power is that there is enough of it to handle spirited music levels with headroom to spare. Bill
|
|
|
Post by leonski on Mar 30, 2019 2:29:10 GMT -5
Right you are, 405. Biamp of a speaker which has jumper allowing you to split the crossover doesn't do a LOT of good. OTOH? Drivers right to the amp have many theoretical and practical advantages. Most will be unwilling to 'operate' on their speakers to go to active line level / biamp.
|
|