Hi all,
New here, though I've learned a lot from lurking threads for a while. I'm basically a noob when it comes to this stuff despite being a reasonably experienced sound engineer.
I've rigged a hifimediy T1 tk2050 amp up to an old passive PA cabinet (an EV SH1512ER, rated to 200W at 8ohms) to run off 24v battery power. I have a small powered Rolls powered mixer as a preamp adding about 26db of gain running into a small passive crossover and mono sum i built (off of this design MonoXover 2-way Pre-amp Audio Crossover : 4 Steps - Instructables), which runs directly into the the amp's inputs (so its bi-amped as one channel to the tweet one channel to the 15" woofer).
It all works and i'm stoked on it, it sounds quite amazing in fact. However, I'm quite sure that I'm not getting what I think should be max output of the system and am trying to figure out where my weak point is. I have a few clues and wonder if anyone here has thoughts or suggestions:
1) First, obviously the amp is underpowered for the speakers. I might consider replacing the T1 (2x100W) with a T4 (2x180W) which i know might give me close to double the clean volume I currently have. Still i think i can get more with the T1.
2) The T1's input voltage is rated up to 39v. If i add another 12v battery in series to what i have to bring it up to 36v, I'm sure i'll get more power - would this increase my output significantly or only marginally? Anyone with experience here?
3) I'm running the Rolls preamp at 12v instead of 15. I'm probably losing some headroom here. Unfortunately they seem to have changed the input voltage of the MX51s to 15v without updating the specs online, i thought it was 12v max when i got it. Still dont imagine this is the main problem (although I do hear it cracking up at the very top 10% of its range).
4) Lastly I wonder about input impedance on the amp itself. I've seen people reference changing 2 resistor values on the PCB of the amp itself to decrease impedance on the input section of the amp and get more volume flowing. Any experience with this?
Thanks in advance for any thoughts or ideas. Best wishes to all
New here, though I've learned a lot from lurking threads for a while. I'm basically a noob when it comes to this stuff despite being a reasonably experienced sound engineer.
I've rigged a hifimediy T1 tk2050 amp up to an old passive PA cabinet (an EV SH1512ER, rated to 200W at 8ohms) to run off 24v battery power. I have a small powered Rolls powered mixer as a preamp adding about 26db of gain running into a small passive crossover and mono sum i built (off of this design MonoXover 2-way Pre-amp Audio Crossover : 4 Steps - Instructables), which runs directly into the the amp's inputs (so its bi-amped as one channel to the tweet one channel to the 15" woofer).
It all works and i'm stoked on it, it sounds quite amazing in fact. However, I'm quite sure that I'm not getting what I think should be max output of the system and am trying to figure out where my weak point is. I have a few clues and wonder if anyone here has thoughts or suggestions:
1) First, obviously the amp is underpowered for the speakers. I might consider replacing the T1 (2x100W) with a T4 (2x180W) which i know might give me close to double the clean volume I currently have. Still i think i can get more with the T1.
2) The T1's input voltage is rated up to 39v. If i add another 12v battery in series to what i have to bring it up to 36v, I'm sure i'll get more power - would this increase my output significantly or only marginally? Anyone with experience here?
3) I'm running the Rolls preamp at 12v instead of 15. I'm probably losing some headroom here. Unfortunately they seem to have changed the input voltage of the MX51s to 15v without updating the specs online, i thought it was 12v max when i got it. Still dont imagine this is the main problem (although I do hear it cracking up at the very top 10% of its range).
4) Lastly I wonder about input impedance on the amp itself. I've seen people reference changing 2 resistor values on the PCB of the amp itself to decrease impedance on the input section of the amp and get more volume flowing. Any experience with this?
Thanks in advance for any thoughts or ideas. Best wishes to all