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18inch subs


JaredM42

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58 minutes ago, JaredM42 said:

ok i just connected the 3 subs in parallel and WOW what a difference i might be able to hit 120 decibles after all lol

 

More than likely, you will kill the amp. 30 amps load is a 240-volt load, not a 120-volt load. Max on a 120-volt is 20 amp. Don't forget you will have to deal with the heat generated also, in the amp. 

 

That is why many amplifier manufacturers switch to 240-volt, like D'Agostino.

Current:  Daphile on an AMD A10-9500 with 16 GB RAM

DAC - TEAC UD-501 DAC 

Pre-amp - Rotel RC-1590

Amplification - Benchmark AHB2 amplifier

Speakers - Revel M126Be with 2 REL 7/ti subwoofers

Cables - Tara Labs RSC Reference and Blue Jean Cable Balanced Interconnects

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8 hours ago, JaredM42 said:

ok i just connected the 3 subs in parallel and WOW what a difference i might be able to hit 120 decibles after all lol

How do you measure 120 decibel SPL value ? Conventional A-weighting SPL meter does not measure subwoofer frequency range, and needs special Z-Weighting SPL meter.

 

AWeighting.png.4acb109dd278206dbfb4bb7cde88ea89.png

Above figure is from https://www.onosokki.co.jp/English/hp_e/whats_new/SV_rpt/SV_7/sv7_5.htm

Sunday programmer since 1985

Developer of PlayPcmWin

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and wow didnt know that their was that much or kind of data on sound frequency and such eventhough 80 percent of that link was rather confuseing to me for now however i knew stepping into this world of audio was more then just connecting wires and hopeing it works i just never really knew just how much depth their was so thank you for enlightening me yamamoto

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1 hour ago, JaredM42 said:

and wow didnt know that their was that much or kind of data on sound frequency and such eventhough 80 percent of that link was rather confuseing to me for now however i knew stepping into this world of audio was more then just connecting wires and hopeing it works i just never really knew just how much depth their was so thank you for enlightening me yamamoto

Yeah, wrong SPL meter for subwoofer measurement is one of the major pitfall of audio and I fell into the trap in the past 😁

Sunday programmer since 1985

Developer of PlayPcmWin

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On 11/14/2022 at 9:12 AM, botrytis said:

 

More than likely, you will kill the amp. 30 amps load is a 240-volt load, not a 120-volt load. Max on a 120-volt is 20 amp. Don't forget you will have to deal with the heat generated also, in the amp.

Well no it doesn't work that way. A 20 Amp circuit breaker rating, is for 3 hours of continuous 20 Amp current flow. The circuit can carry way more current for short periods of time. Music draws high current for very short periods of time. But no, you can't play full volume test tones and walk away.

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Not the way Dan D'Agostino explained it to me :D

 

a 1500 WPC amp, if it doubles down, like his, yes you do.

Current:  Daphile on an AMD A10-9500 with 16 GB RAM

DAC - TEAC UD-501 DAC 

Pre-amp - Rotel RC-1590

Amplification - Benchmark AHB2 amplifier

Speakers - Revel M126Be with 2 REL 7/ti subwoofers

Cables - Tara Labs RSC Reference and Blue Jean Cable Balanced Interconnects

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Remember Class A/B are ~50% efficient - so 1/2 goes for power the other for heat. 

Current:  Daphile on an AMD A10-9500 with 16 GB RAM

DAC - TEAC UD-501 DAC 

Pre-amp - Rotel RC-1590

Amplification - Benchmark AHB2 amplifier

Speakers - Revel M126Be with 2 REL 7/ti subwoofers

Cables - Tara Labs RSC Reference and Blue Jean Cable Balanced Interconnects

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  • 5 weeks later...
On 11/19/2022 at 8:59 AM, Speedskater said:

Well no it doesn't work that way. A 20 Amp circuit breaker rating, is for 3 hours of continuous 20 Amp current flow. The circuit can carry way more current for short periods of time. Music draws high current for very short periods of time. But no, you can't play full volume test tones and walk away.

i realized this the other day when i play my music at half i can walk away for a good couple hours without worry also i had to much of a load on the receiver :\   

 

so i lightended the load to 2 pair of speakers and spread the other speakers over other devices and it just works  still rather amazeing what a 230watt receiver can actually do though..

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