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Behringer Inuke 3000
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<blockquote data-quote="Art Welter" data-source="post: 203658" data-attributes="member: 52"><p>Drew,</p><p></p><p>Good to know the NU6000 is short protected.</p><p>I ran a QSC amp into a short when comparing it to the NU4-6000, the QSC blew an output device.</p><p>Even though it would have been covered by it's three year warranty (had I had working internet at the time of purchase...) QSC refused to honor the warranty. QSC has permanently lost Welter Systems, Inc. as a customer</p><p></p><p>As far as the fan noise issue, the later versions of the NU4-6000 are as quiet as any fan cooled amp now- in fact I'm using one of my NU4-6000 two feet away from me to drive my studio monitors (I should say studio monitor, yesterday my 30+ year old Hafler DH-200 amp developed some DC output on the right side, and burned up one of my 20+ year old Tannoy PBM 6.5 monitor's woofer :^( ).</p><p></p><p>Signal to noise ratio on the NU4-6000 is excellent, I don't hear any noise from 115 dB sensitive HF horns even with my ear to the horn.</p><p></p><p>Just before the 2015 Christmas holidays I conducted a battery of tests on some old amplifiers and a new (to me) Behringer NU4-6000 four channel amplifier. To my surprise, the NU4-6000 performed as well on low frequencies as on mid/high frequencies, and is capable of near full power sine wave output with all four channels driven to rated output at two ohms, or two bridged mono pairs driving four ohm loads each. The $350 NU4-6000 appears to be within 3 dB of the $5500 Powersoft K10 published rating on sustained (more than 1 second) output.</p><p></p><p>The NU4-6000 with two bridged mono pairs each driving four ohm loads just below the illumination of the clip/limit light each put out 85.5 volts at 60 Hz (1828 watts), 84.6 volts at 30 Hz (1789 watts), dropping the mains voltage on a 100' 10AWG 120V line from 118.1 volts down to 107.2 volts, drawing 31 amperes.</p><p></p><p>Using just one bridged mono pair, the amp ran for 40+ seconds before I terminated the test, as the amp was drawing 19.8 amperes, and the "tired" 20 amp mains breaker had popped several times in various tests already. The amp would have put out more power given a full 120 volts, but the test represents a "real world" situation, we don't generally plug our amplifiers in to an outlet two feet from the mains transformer.</p><p></p><p>I also tested my old "heavy iron" bass favorite, a Crest CA9, bridged into a 4 ohm load it dropped the mains to 99.6 volts, drew 37.8 amps but only put out 80 volts (1600 watts). The NU4-6000 put out more power, and drew only 50% of the power from the mains compared to the CA9, and weighs a small fraction of the "heavy iron".</p><p></p><p>My back (and bank account) have been very pleased with the NU4-6000, since the testing I have purchased another three.</p><p>I may purchase one of the less powerful NUs rather than repairing the aged Hafler DH-200 and buying a DC protection circuit for it..</p><p></p><p>Art</p></blockquote><p></p>
[QUOTE="Art Welter, post: 203658, member: 52"] Drew, Good to know the NU6000 is short protected. I ran a QSC amp into a short when comparing it to the NU4-6000, the QSC blew an output device. Even though it would have been covered by it's three year warranty (had I had working internet at the time of purchase...) QSC refused to honor the warranty. QSC has permanently lost Welter Systems, Inc. as a customer As far as the fan noise issue, the later versions of the NU4-6000 are as quiet as any fan cooled amp now- in fact I'm using one of my NU4-6000 two feet away from me to drive my studio monitors (I should say studio monitor, yesterday my 30+ year old Hafler DH-200 amp developed some DC output on the right side, and burned up one of my 20+ year old Tannoy PBM 6.5 monitor's woofer :^( ). Signal to noise ratio on the NU4-6000 is excellent, I don't hear any noise from 115 dB sensitive HF horns even with my ear to the horn. Just before the 2015 Christmas holidays I conducted a battery of tests on some old amplifiers and a new (to me) Behringer NU4-6000 four channel amplifier. To my surprise, the NU4-6000 performed as well on low frequencies as on mid/high frequencies, and is capable of near full power sine wave output with all four channels driven to rated output at two ohms, or two bridged mono pairs driving four ohm loads each. The $350 NU4-6000 appears to be within 3 dB of the $5500 Powersoft K10 published rating on sustained (more than 1 second) output. The NU4-6000 with two bridged mono pairs each driving four ohm loads just below the illumination of the clip/limit light each put out 85.5 volts at 60 Hz (1828 watts), 84.6 volts at 30 Hz (1789 watts), dropping the mains voltage on a 100' 10AWG 120V line from 118.1 volts down to 107.2 volts, drawing 31 amperes. Using just one bridged mono pair, the amp ran for 40+ seconds before I terminated the test, as the amp was drawing 19.8 amperes, and the "tired" 20 amp mains breaker had popped several times in various tests already. The amp would have put out more power given a full 120 volts, but the test represents a "real world" situation, we don't generally plug our amplifiers in to an outlet two feet from the mains transformer. I also tested my old "heavy iron" bass favorite, a Crest CA9, bridged into a 4 ohm load it dropped the mains to 99.6 volts, drew 37.8 amps but only put out 80 volts (1600 watts). The NU4-6000 put out more power, and drew only 50% of the power from the mains compared to the CA9, and weighs a small fraction of the "heavy iron". My back (and bank account) have been very pleased with the NU4-6000, since the testing I have purchased another three. I may purchase one of the less powerful NUs rather than repairing the aged Hafler DH-200 and buying a DC protection circuit for it.. Art [/QUOTE]
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