JBL M350 mid tops + M355 bass bins use of internal crossover?
Posted 14 March 2007 - 12:37 PM
I'm not sure what power rating the M355s have, but I have a C-Audio RA3000 amplifier - would this be enough to run the lot?
Posted 14 March 2007 - 04:57 PM
Your mid/tops will have a crossover in them between the main driver and the horn, but this will not run the bins. You need to know if the bins have a crossover in them and the easiest way might be to take the back plate off and take a look. If it's just bare wires then no crossover, if there's components chances are you have one.
Either way the amplifier is inadequate. With a crossover in the bins the amp will see an 8 ohm load, and since your demand at 8 ohms would be 350 + 500 = 850W and your amp can only make 400W you'd be severely underpowered. Really you need an amp capable of delivering 1600W if that's the intended running configuration. Better still would be an active crossover and another amp to handle the subs with a tad more power.
Posted 14 March 2007 - 05:29 PM
Back in the day had quite alot of dealings with the old M-series. You'd probably look at another RA-3001 if they were still available and it were still the early 90's - oh and you wanted to run the system two way active.. That said you can still pick up such amps for pretty money these days. I remember the M350 had an internal passive crossover inside and also believe that the bass M-355 had one to link to the M-330/M350/M360 but can't find any of my old manuals for it at the moment. Chris's advice there is spot on too, open the connector panel up and see what components there are there. If there are none you need and external active x-over and another amp. If there are some then you need a much bigger amp to drive all of the compoenents together.
let me know what you find I may have found my manuals and schematics in the meantime
Posted 15 March 2007 - 10:35 AM
I have a PSL KA1202 but no external crossover, is there any way I could run these 2 amps together without using an external crossover?
Posted 15 March 2007 - 12:30 PM
Not a good one.
Posted 19 March 2007 - 01:08 PM
THe tec spec for the M350 says:
frequency response: 32hz - 18khz
crossover frequency: 1100hz
not sure about the M355.
If I'm splitting the signal with the external crossover then do I still need to flip the switch for the internal crossover on the speakers?
Posted 19 March 2007 - 04:26 PM