![]() You guys need to see the forest for the trees, if you want/need more power and want to have two of these stereo amps, just vertically bi-amp them, then you gain the power in the bass and dynamic headroom, without taking a hit on everything else if you bridge them.Ĭheers - only you can say whether you need more headroom with your room/speakers. amp because of the reduction in all the other parameters it will take a hit on by bridging. You just take that was a good stereo amp, send it down the path of becoming a mono P.A. ![]() Headroom is head room, if you haven’t reached it there’s no reason to make it higher by bridging and taking a hit on everything else. If you don’t use all the dynamic headroom power with a single stereo amp, you will gain nothing by bridging having even more. I was thinking that the extra power would improve almost everything about this, particularly in more dynamic recordings. You have successfully just made the damping factor that was already diminished because of bridging, even worse by installing even more series resistance, good work. (with the addition of a 3/4 ohm series resistor in the primary) which means they will drive anything. From all the reviews, I've read, AHB2 sounded even better in bridged mode. AHB2 power supply is line and load regulated and should not sag. It might be unregulated (in most cases) power supply voltage that is sagging when twice the current is demanded. There might be other reasons why some amplifiers sound worse when bridged. It might explain why some tube amps, that have very low DF (as low as 1.5), still sound great. Also for the same reason the highest effective damping that can be achieved is equal about 1.5 (nominal speaker's impedance divided by resistive part of this impedance). At the end it comes to 6.1ohm vs 6.05ohm difference (about 1%). This current is equal back EMF (voltage on the speaker) divided by impedance in the circuit that consists of amplifiers output impedance, cable impedance, and the driver itself. Since the OP's Pulsar Seas woofers have more mechanical damping they may not need too much electrical damping from the amplifier bridging the amp may offer a more dynamic bass if the stereo amp/speaker pair is overdamped.Įlectrical damping occurs because moving coil generates voltage that produces current in direction that causes motion of the membrane in opposite direction hence stopping the membrane. Just compare a Pass and an Audionet amp and you will see how their bass is very different the Audionet's bass is much more damped and dry with better transient response, but it can sound dynamically constricted with low Q overdamped speakers There are threads on trying to find a suitable amplifier for them as their bass would sound loose and bloated with low and normal damping factor amplifiers. Most of this impedance is resistive.Ī speaker relies both on mechanical damping and electrical damping, its Qms and Qes parameters Raidho for example expressly recommended high damping factor amplifiers for their speakers as their woofers had high Qms and relied on the electrical damping of the amplifier. If you don’t want/need the extra power or the cabling flexibility afforded by mono blocks, just stick with the stereo AHB2 - but rest assured if you decide to go to bridged mono AHB2’s you won’t encounter a sonic penalty with your speakers.įor the damping of the membrane movement - speaker's own impedance is in the series with the amp's output. ![]() Certainly, being able to run very short speaker cables is an advantage of monoblocks. ![]() This probably contributed to the improved sound I noted. I also took the opportunity afforded by mono blocks to change to short speaker cable runs (and longer XLR interconnects). The sound was essentially the same (no surprises) but more ease and better sound staging with the bridged amps. Regardless of the measurements, I can say that in my case (ATC SCM-19 - low sensitivity 8ohm rated speakers like yours) I got an audible improvement from bridged AHB2’s. The distortion specs of the AHB2 in bridged mode will be just as vanishingly low as in stereo mode (see Audio Precision measurements conducted by JA and elsewhere). There would be absolutely no issues running the AHB2 bridged with your Pulsars - their impedance is mostly above 8ohms and only drops as low as 6.5ohms. JA at Stereophile measured the Pulsar’s sensitivity at 83.5dB(B)/2.83V/m, which is quite low, so certainly some situations/program may benefit from more power than the 100W/ch of a single AHB2. My first question was going to be whether you really need the extra power for your situation.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |