Hi everyone, I'm looking for some technical consensus on a power-limiting strategy.
My Setup:
• Pre-pro: Yamaha RX-A2A
• Mains: Focal Chora 826-D (Rated 8 Ohms nominal, but drops to 2.9 Ohms. Power handling is 160W
RMS / 250W Peak).
• Subwoofer: Monolith 15" THX (Handling everything below 90Hz).
• External Amp: Parasound NewClassic 2250 v.2 (Delivers 400W RMS into 4 Ohms, 45 amps peak current).
The Goal:
I want to drive the Focals to their absolute maximum safe volume for parties without any risk of frying the voice coils. Since the phase plug physically moves with the cone on these specific Focal drivers, keeping tight mechanical and thermal control is crucial for me.
The Proposed Strategy:
To prevent the Parasound from sending its full 400W
and melting the speakers at max volume, I plan to set a hard limit using a multimeter and a 60Hz test tone.
1. Set the Yamaha main volume to my absolute maximum desired lim" g., 0.0 dB).
2. Disconnect the speak. and measure the AC Voltage at the Parasound's terminals.
3. Dial down the rear gain knobs on the Parasound until the multimeter reads exactly 21.5 Volts AC (which equals 160W into 2.9 Ohms) or a maximum of 26.9 Volts AC (250W into 2.9 Ohms).
4. Lock it there and run the crossover at 90Hz.
My Questions for the experts:
5. Is setting this hard voltage cap with a multimeter a bulletproof method to guarantee I won't exceed the 160W RMS / 250W Peak limit, even playing heavy electronic music at 100% volume?
6. With the 90Hz crossover active, the towers won't hit that 2.9 Ohm dip (which happens lower in the bass region), so they should draw significantly less current anyway. Am I correct in assuming this setup makes the system practically indestructible?
Thanks in advance for the technical input
My Setup:
• Pre-pro: Yamaha RX-A2A
• Mains: Focal Chora 826-D (Rated 8 Ohms nominal, but drops to 2.9 Ohms. Power handling is 160W
RMS / 250W Peak).
• Subwoofer: Monolith 15" THX (Handling everything below 90Hz).
• External Amp: Parasound NewClassic 2250 v.2 (Delivers 400W RMS into 4 Ohms, 45 amps peak current).
The Goal:
I want to drive the Focals to their absolute maximum safe volume for parties without any risk of frying the voice coils. Since the phase plug physically moves with the cone on these specific Focal drivers, keeping tight mechanical and thermal control is crucial for me.
The Proposed Strategy:
To prevent the Parasound from sending its full 400W
and melting the speakers at max volume, I plan to set a hard limit using a multimeter and a 60Hz test tone.
1. Set the Yamaha main volume to my absolute maximum desired lim" g., 0.0 dB).
2. Disconnect the speak. and measure the AC Voltage at the Parasound's terminals.
3. Dial down the rear gain knobs on the Parasound until the multimeter reads exactly 21.5 Volts AC (which equals 160W into 2.9 Ohms) or a maximum of 26.9 Volts AC (250W into 2.9 Ohms).
4. Lock it there and run the crossover at 90Hz.
My Questions for the experts:
5. Is setting this hard voltage cap with a multimeter a bulletproof method to guarantee I won't exceed the 160W RMS / 250W Peak limit, even playing heavy electronic music at 100% volume?
6. With the 90Hz crossover active, the towers won't hit that 2.9 Ohm dip (which happens lower in the bass region), so they should draw significantly less current anyway. Am I correct in assuming this setup makes the system practically indestructible?
Thanks in advance for the technical input