I have a problem of matching amplifiers and speaker drivers. Attached are 2 styles that I could figure out.
- System A will assign a stand-alone amplifier, Nakamichi PA302 whose power output is rated 80Wpc @ 4 Ohms, drives the 1.5" midrange dome drivers from ADS L780/2 speakers. And the tweeters of 0.75" from ADS L780/2 as well will be driven by the high-pass channels of Soundstream Reference 405 with 25Wpc @ 4 Ohms power outputs.
- System B will use the stand-alone Nakamichi PA-302 to drive the tweeters and the high-pass channels of Soundstream Reference 405 will drive the dome midranges.
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It's very difficult to give an opinion without doing listening tests.
The tests are the only thing that counts to understand if the speakers are driven with the right power, also the three amplifiers have a different way of playing and you have to understand with which sound each single speaker behaves better.
This depends on the personal result that the listener wants.
Also HU and electronic crossover inevitably participate in the final result.
The Soundstream would be mandatory because with the mono channel it must drive the four subwoofer drivers (i imagine series/parallel configuration), and in my opinion it could be a good solution to use the other four channels of the Reference 405 to drive tweeters and dome mids.
This is because the five-channel configuration of the Soundstream is maintained without using the bridge, so that the amplifier is not stressed.
Furthermore in this way you would have timbre coherence between tweeters and mids which is important (human voices and many instruments from about 650Hz and up).
The woofers could thus have a dedicated stereo amplifier (Nakamichi PA-302) of good power compared to the system, because they are usually the section that requires more energy.
The Sony amplifier is an unknown, it could be useful or not, but using the Soundstream, in my opinion the XM-640 is not necessary.
The tests are the only thing that counts to understand if the speakers are driven with the right power, also the three amplifiers have a different way of playing and you have to understand with which sound each single speaker behaves better.
This depends on the personal result that the listener wants.
Also HU and electronic crossover inevitably participate in the final result.
The Soundstream would be mandatory because with the mono channel it must drive the four subwoofer drivers (i imagine series/parallel configuration), and in my opinion it could be a good solution to use the other four channels of the Reference 405 to drive tweeters and dome mids.
This is because the five-channel configuration of the Soundstream is maintained without using the bridge, so that the amplifier is not stressed.
Furthermore in this way you would have timbre coherence between tweeters and mids which is important (human voices and many instruments from about 650Hz and up).
The woofers could thus have a dedicated stereo amplifier (Nakamichi PA-302) of good power compared to the system, because they are usually the section that requires more energy.
The Sony amplifier is an unknown, it could be useful or not, but using the Soundstream, in my opinion the XM-640 is not necessary.
I thought you said the XM-640 was blown? I guess I misread.
Without knowing the speakers, make/model, links to them online to see their specs... it's difficult to make recommendations.
Without a scope (even a cheap one), how are you going to know how much power is actually being driven to the speakers?
Without knowing the speakers, make/model, links to them online to see their specs... it's difficult to make recommendations.
Without a scope (even a cheap one), how are you going to know how much power is actually being driven to the speakers?
The speaker drive units used are listed below:
1. Tweeters: parted out from home audio speakers ADS L780/2, 0.75” soft dome, Re = 3.2 Ohms
2. Midranges: parted out from L780/2 too, 1.5” soft dome, Re = 4 Ohms
3. Woofers: car speakers, ADS AL6, 6.5” poly cone, Re = 4 Ohms
4. Subwoofers: car speakers, ADS S10, 10” paper cone, Re = 3.6 Ohms