Hi,
I have been running my 7.2.6 system with a Denon AVR-X6700H (link to ASR review) and two external amplifiers (XTZ Edge A2-300, link to ASR review, link to the manual with specs) for the LCRs. I've used these amps with the gain set to its highest setting without thinking about whether it is the optimal setting or not (the concept of gain matching is new to me).
Now, I've decided to upgrade the amplification for the LCRs with the Purifi-based three channel amplifier Audiophonics HPA-T450ET (link to manufacturers specs) and use the two XTZ Edge A2-300 to power the surround and back surround speakers instead.
Now to the question: how would you recommend I gain match these two (three including the Denon AVR) amplifiers?
Given that the Denon can easily output 2 Vrms (up to 4.4 Vrms @ 92 dB SINAD), my thinking was that I start by setting the Audiophonics HPA-T450ET to its second lowest gain setting of 20dB whereby it reaches its max power output at 2.12Vrms (RCA input). My 4 Ohm speakers can't handle the 300 W that the amplifier can output, but my understanding is that I shouldn't think about that, but rather the match between the pre-out voltage and the voltage needed to drive the amplifier to its maximum power (?).
But then what?
The XTZ Edge A2-300 has a gain potentiometer and I have no idea what the gain span is (the manual does not say, it just says gain 28.15 dB, while the ASR review suggests it can go higher than that). I was thinking that I could measure the SPL output of a given speaker at a given AVR volume level with the Audiophonics HPA-T450ET powering the speaker, then switch the amplification of that speaker to the XTZ Edge A2-300 and adjust the gain potentiometer until it matches the previously recorded SPL output as closely as possible.
Is this a sensible approach, or do you have a better suggestion? Obviously, I want to find the gain setting that gives me the lowest noise and highest dynamic range possible.
Thanks in advance!
I have been running my 7.2.6 system with a Denon AVR-X6700H (link to ASR review) and two external amplifiers (XTZ Edge A2-300, link to ASR review, link to the manual with specs) for the LCRs. I've used these amps with the gain set to its highest setting without thinking about whether it is the optimal setting or not (the concept of gain matching is new to me).
Now, I've decided to upgrade the amplification for the LCRs with the Purifi-based three channel amplifier Audiophonics HPA-T450ET (link to manufacturers specs) and use the two XTZ Edge A2-300 to power the surround and back surround speakers instead.
Now to the question: how would you recommend I gain match these two (three including the Denon AVR) amplifiers?
Given that the Denon can easily output 2 Vrms (up to 4.4 Vrms @ 92 dB SINAD), my thinking was that I start by setting the Audiophonics HPA-T450ET to its second lowest gain setting of 20dB whereby it reaches its max power output at 2.12Vrms (RCA input). My 4 Ohm speakers can't handle the 300 W that the amplifier can output, but my understanding is that I shouldn't think about that, but rather the match between the pre-out voltage and the voltage needed to drive the amplifier to its maximum power (?).
But then what?
The XTZ Edge A2-300 has a gain potentiometer and I have no idea what the gain span is (the manual does not say, it just says gain 28.15 dB, while the ASR review suggests it can go higher than that). I was thinking that I could measure the SPL output of a given speaker at a given AVR volume level with the Audiophonics HPA-T450ET powering the speaker, then switch the amplification of that speaker to the XTZ Edge A2-300 and adjust the gain potentiometer until it matches the previously recorded SPL output as closely as possible.
Is this a sensible approach, or do you have a better suggestion? Obviously, I want to find the gain setting that gives me the lowest noise and highest dynamic range possible.
Thanks in advance!