Seeking advice in piggybacking amps

[Ian B]

I wonder if anyone has any suggestions for this - I currently own 2 bass combo maps (Eden Nemesis 210 - 250w into 2 10inch and a Roland 250w with one 15inch). When I need more volume than one of these amps can produce - I have combined them with fairly good results. However what is the best way of doing this ? - My current practice is to plug into the "headphone out" jack on the Nemesis and then into the "low input" jack on the Roland, with the Roland on no more than half power with flat EQ. I get a bit of hum, but it sounds reasonable and keeps most of the Nemesis sound intact. I wonder whether using the "effects loops" on either amp might be a better way to go, or if there is some other way. Any ideas ?

 

[middy]

With headphone into input, you're probably sending too hot a signal, plus you're going through 2 preamps on the second amp. No wonder it's noisy.

Try the effects send on the Eden into the effects return on the Roland (or vice versa depending on which preamp you like better).

 

[Ian B]

Thanks - I had tried that connection on a prior occasion and it seemed to buzz too much - but tried it again and it seems to work OK - any possible negatives that you know of with connection through effects send/return? eg is there a risk of damaging either amp at higher volumes ?

 

[will33]

The effects return on whichever amp is the slave should bypass the slave amps pre section and go directly to the power amp. Basically just like have another power amp and speaker operating off of the pre of the first amp. If the slave amp has a power amp in jack you can try plugging in there if the effects loop is noisy. Should give you the same chain as using the effects return. Adjust the master volumes on both amps to get what you can out of them without clipping/distorting.

 

[Ian B]

That's great thanks v much