I don't agree George, keep all resistances to a minimum. I use analog active crossovers all the way, you should try them. Only wire between the voice coils and the amplifier outputs! I'm using TDM 24CX-4 for my tri-amp system and Phase Linear X20 for my bi-amp system. I prefer to stay with analog as I like the sound. I don't like mixing digital and analog unless I must. Digital crossovers are much more versatile and usually less expensive, but to be honest I have not tried them... I vote for a good analog electronic crossover. I know Ashley made some with RCA's, but they are super rare now, just like the Phase Linear X20's. I use gold plated TS phone to RCA adapters because I can't find silver TS phone adapters... Any suggestions?
Bi amp and bias issue
Hello I need help with biamping my magnepan 3.5r I have a krell Kav 2250 25.7 gain 2.53vrms input sensitivity for bass and rogue audio m150 29gain 1vrms input sensitivity.
I tried using stock crossover using krell for bass and rogue for mid and tweeter and it works but only when i use triode mode on rogue if i switch to ultra linear when I try to bias the meter on rogue oscillates.
I contacted rogue they said its the tweeter load the amp is not designed to play just the tweeters but i tried running just the tweeter with it and not turn on the krell and it does not oscillate .
I replaced the 12ax7 driver tubes on the rogue with 12au7 and that stopped the oscillation but rogue said they dont know how it will affect the amp in long term.
Another problem im having is that the rogue plays alot louder than the krell
also if anyone is curious the rogues sound better playing the speakers than the krell rogues are 150 watts into 4ohm and krell are 500w the bass sounds better with most music including pop techno hip hop with the rogues the krell sounds better when theres alot of energy lots of fast bass sounds where the rogues dont have as much grip during those passages.
the rest of the system is denon dl103r mc /jensen mc transformer/rega p3 /hagerman trumpet phono/
I tried using stock crossover using krell for bass and rogue for mid and tweeter and it works but only when i use triode mode on rogue if i switch to ultra linear when I try to bias the meter on rogue oscillates.
I contacted rogue they said its the tweeter load the amp is not designed to play just the tweeters but i tried running just the tweeter with it and not turn on the krell and it does not oscillate .
I replaced the 12ax7 driver tubes on the rogue with 12au7 and that stopped the oscillation but rogue said they dont know how it will affect the amp in long term.
Another problem im having is that the rogue plays alot louder than the krell
also if anyone is curious the rogues sound better playing the speakers than the krell rogues are 150 watts into 4ohm and krell are 500w the bass sounds better with most music including pop techno hip hop with the rogues the krell sounds better when theres alot of energy lots of fast bass sounds where the rogues dont have as much grip during those passages.
the rest of the system is denon dl103r mc /jensen mc transformer/rega p3 /hagerman trumpet phono/
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- 16 posts total
That’s your prerogative, Yes (min resistance) that is normally the way for full range, and when the bass is involved, for better damping factor. But because it’s just the mids and treble, it won’t make any difference, and will be beneficial to the stability of the amp. As the amp will be a little less stable in UL mode compared to Triode, and goes into semi oscillation when it sees that inductor across it’s output and certain frequencies. And the 50w 1ohm series resistor should cure that without any side effects. beep23 Planers and ESL’s are known for their naturalness through the mids and highs, don’t "sterilize" them up with using active electronic xovers, keep the passive to feed them. Cheers George |
Yes I know it is. Your opinion George, everyone is entitled to theirs. If your amps can't handle the current, change amps. Add a resistor if needed, but adding resistance will be detrimental to the high frequency response. I like accuracy, that's why I use solid silver wire or silver plated copper wire for most applications when I can afford it. |
- 16 posts total