signalflow
Well-known member
This past summer I had a friend of mine ask me to rack up a pair of M15's for him and to see if there was anything to upgrade in them.
Here are some pics.
Changed the stock 4558(or whatever they were) to OPA2604AP in all positions, added a balancing board from the 9k project and bumped the voltage rails up to +-18V with a JLM power station.
I had a chance to track some bass through them and they sounded fantastic!! Had another friend raving about his Avalon 737 so we did a test for fun and the TEAC's killed it in my opinion.
In the end he wanted the most I/O he could get so we ended up with the Mic/line input, insert, Aux A&B out unbalanced and a balanced direct out on each channel.
One thing, and I mentioned this in another thread, DO NOT use the 2U steel case from MPJA.com the system holes will not line up with any rack you try to put it in. It's either the top holes are used or, the bottom holes, not all 4. Luckily enough the guy was cool about it.
-Casey
Here are some pics.
Changed the stock 4558(or whatever they were) to OPA2604AP in all positions, added a balancing board from the 9k project and bumped the voltage rails up to +-18V with a JLM power station.
I had a chance to track some bass through them and they sounded fantastic!! Had another friend raving about his Avalon 737 so we did a test for fun and the TEAC's killed it in my opinion.
In the end he wanted the most I/O he could get so we ended up with the Mic/line input, insert, Aux A&B out unbalanced and a balanced direct out on each channel.
One thing, and I mentioned this in another thread, DO NOT use the 2U steel case from MPJA.com the system holes will not line up with any rack you try to put it in. It's either the top holes are used or, the bottom holes, not all 4. Luckily enough the guy was cool about it.
-Casey