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Old 11-16-2018, 11:10 PM
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Antonmb Antonmb is offline
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Default Momentum pre - using 2nd output for headphone amp

The Momentum pre has 2 sets of balanced outputs. According to Bill McKiegan at d’Agostino, they are both active all the time. I’m wondering if I can use the 2nd pair for a headphone amp. The headphone amp (Woo WA6) has no balanced inputs, so I’d have to convert from XLR to RCA at the pre or headphone end. I would only run either the headphone amp or power amp, never both at the same time. Does anyone see any issues with this setup? Will having both outputs connected, one to a balanced device and one not, change output impedance?
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________________________________
Main system: Linn Klimax Katalyst DSM; D’Agostino Momentum S250 & HD pre; Rega RP10 w/Rega Aphelion; Boulder 508; Sonus Faber Amati Futura; Shunyata Denali 6000T, Alpha NR & EF PC, Alpha IC & SC; UpTone EtherRegen; Quadraspire Sunoko-Vent T, ISOAcoustics Orea & HRS Damping

2nd system: Luxman SQ-N100, Sonus Faber Minima Amator II, REL T-5, refurbished AR XA w/Nagaoka MP-200 & VPI cabling, Linn Klimax DSM Renew, Shunyata PS8 w/Defender & Viper, Nordost Blue Heaven PC & IC, Shunyata Venom sc, Symposium Svelte Shelves

Workshop: Vintage Yamaha CA-1010 & CT-1010, PSB Imagine Mini, Squeezebox Touch, Schiit BiFrost, AZ & WW cables

Digital Streaming source: SonicTransporter i7 w/Roon, Synology DS420+, English Electric 8switch

Personal audio: Woo WA6, WA7 & WA8; Auralic Aries Mini, Sonore MicroRendu & UltraRendu; Shure SE535, Shure SH1540, Westone ES50 Custom, Sennheiser HD820, MrSpeakers Aeon Flow C; Various Moon Audio dragons

Video: Sony XBR65X850C; Apple TV-4; Vienna Schönberg L/R, Webern center & surrounds; REL T1, T2, & T3; Arcam AVR850; Cambridge Audio 752BD; MIT-EXP SC
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Old 11-16-2018, 11:14 PM
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Default

Quote:
Originally Posted by Antonmb View Post
The Momentum pre has 2 sets of balanced outputs. According to Bill McKiegan at d’Agostino, they are both active all the time. I’m wondering if I can use the 2nd pair for a headphone amp. The headphone amp (Woo WA6) has no balanced inputs, so I’d have to convert from XLR to RCA at the pre or headphone end. I would only run either the headphone amp or power amp, never both at the same time. Does anyone see any issues with this setup? Will having both outputs connected, one to a balanced device and one not, change output impedance?
Tony - I asked the same thing before I got my Momentum pre.......they called D'agostino to confirm and they said that there would be no problems using the second set of outputs like that....I was asking in case I wanted to use the output for a subwoofer. They said the same thing, both are active and should be no problem.

- Buck
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Library: Speakers: Avalon Acoustics Isis, Subwoofers: (2) REL Acoustics 212SE Amplification: D’agostino Momentum preamplifier, D’agostino S250 stereo amplifier Digital: dCS Rossini CD/SACD transport, dCS Rossini DAC/streamer/master clock. Analog: Brinkmann Taurus table, Lyra Etna Lambda, Audio Research Ref. Phono 3
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Old 11-16-2018, 11:23 PM
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Quote:
Originally Posted by audioguy3107 View Post
Tony - I asked the same thing before I got my Momentum pre.......they called D'agostino to confirm and they said that there would be no problems using the second set of outputs like that....I was asking in case I wanted to use the output for a subwoofer. They said the same thing, both are active and should be no problem.



- Buck


Cool, thanks Buck.
__________________
Tony
"Have you seen the stars tonight?"
________________________________
Main system: Linn Klimax Katalyst DSM; D’Agostino Momentum S250 & HD pre; Rega RP10 w/Rega Aphelion; Boulder 508; Sonus Faber Amati Futura; Shunyata Denali 6000T, Alpha NR & EF PC, Alpha IC & SC; UpTone EtherRegen; Quadraspire Sunoko-Vent T, ISOAcoustics Orea & HRS Damping

2nd system: Luxman SQ-N100, Sonus Faber Minima Amator II, REL T-5, refurbished AR XA w/Nagaoka MP-200 & VPI cabling, Linn Klimax DSM Renew, Shunyata PS8 w/Defender & Viper, Nordost Blue Heaven PC & IC, Shunyata Venom sc, Symposium Svelte Shelves

Workshop: Vintage Yamaha CA-1010 & CT-1010, PSB Imagine Mini, Squeezebox Touch, Schiit BiFrost, AZ & WW cables

Digital Streaming source: SonicTransporter i7 w/Roon, Synology DS420+, English Electric 8switch

Personal audio: Woo WA6, WA7 & WA8; Auralic Aries Mini, Sonore MicroRendu & UltraRendu; Shure SE535, Shure SH1540, Westone ES50 Custom, Sennheiser HD820, MrSpeakers Aeon Flow C; Various Moon Audio dragons

Video: Sony XBR65X850C; Apple TV-4; Vienna Schönberg L/R, Webern center & surrounds; REL T1, T2, & T3; Arcam AVR850; Cambridge Audio 752BD; MIT-EXP SC
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Old 11-17-2018, 12:40 AM
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On second thought, it occurs to me the output is volume controlled, so that may present a wrinkle for a headphone amp.
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Tony
"Have you seen the stars tonight?"
________________________________
Main system: Linn Klimax Katalyst DSM; D’Agostino Momentum S250 & HD pre; Rega RP10 w/Rega Aphelion; Boulder 508; Sonus Faber Amati Futura; Shunyata Denali 6000T, Alpha NR & EF PC, Alpha IC & SC; UpTone EtherRegen; Quadraspire Sunoko-Vent T, ISOAcoustics Orea & HRS Damping

2nd system: Luxman SQ-N100, Sonus Faber Minima Amator II, REL T-5, refurbished AR XA w/Nagaoka MP-200 & VPI cabling, Linn Klimax DSM Renew, Shunyata PS8 w/Defender & Viper, Nordost Blue Heaven PC & IC, Shunyata Venom sc, Symposium Svelte Shelves

Workshop: Vintage Yamaha CA-1010 & CT-1010, PSB Imagine Mini, Squeezebox Touch, Schiit BiFrost, AZ & WW cables

Digital Streaming source: SonicTransporter i7 w/Roon, Synology DS420+, English Electric 8switch

Personal audio: Woo WA6, WA7 & WA8; Auralic Aries Mini, Sonore MicroRendu & UltraRendu; Shure SE535, Shure SH1540, Westone ES50 Custom, Sennheiser HD820, MrSpeakers Aeon Flow C; Various Moon Audio dragons

Video: Sony XBR65X850C; Apple TV-4; Vienna Schönberg L/R, Webern center & surrounds; REL T1, T2, & T3; Arcam AVR850; Cambridge Audio 752BD; MIT-EXP SC
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Old 11-17-2018, 02:07 AM
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I would turn the Woo volume knob to the 2 or 3 o’clock which should approximate unity gain....then use the pre to control volume.
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Old 11-17-2018, 08:48 PM
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Default Momentum pre - using 2nd output for headphone amp

Quote:
Originally Posted by Antonmb View Post
The headphone amp (Woo WA6) has no balanced inputs, so I’d have to convert from XLR to RCA at the pre or headphone end.

Tony - Whatever you decide, and if your not aware, a pair of adapters are included with the Momentum PreAmp - Ed
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Source Analog: Kuzma Stabi R with 4point 9 arm & Kuzma 40 Cartridge
Source Digital: Aurender N10 | Brinkmann Nyquist MK II
Amplification: Dan D’Agostino Momentum Pre Amp and Monos | Boulder Phono 508
Speakers: Wilson Alexias
Cabling: Nordost Odin/Valhalla 2; Power, Interconnects & Speaker | Ansuz; C2 Power & Interconnect | Audioquest Diamond RJ 45’s
Power: Nordost QRT series | Furutech FP55SN cable from 20 amp breaker within grounded Sub Panel to Furutech GTX D NSF receptacle packages | Surge Guard on Main Panel | Keces P3 & P8 | ADD-POWR series
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  #7  
Old 11-17-2018, 09:01 PM
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Antonmb Antonmb is offline
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Default Momentum pre - using 2nd output for headphone amp

Quote:
Originally Posted by For The Love of Music View Post
Tony - Whatever you decide, and if your not aware, a pair of adapters are included with the Momentum PreAmp - Ed


Yes, thanks Ed.
__________________
Tony
"Have you seen the stars tonight?"
________________________________
Main system: Linn Klimax Katalyst DSM; D’Agostino Momentum S250 & HD pre; Rega RP10 w/Rega Aphelion; Boulder 508; Sonus Faber Amati Futura; Shunyata Denali 6000T, Alpha NR & EF PC, Alpha IC & SC; UpTone EtherRegen; Quadraspire Sunoko-Vent T, ISOAcoustics Orea & HRS Damping

2nd system: Luxman SQ-N100, Sonus Faber Minima Amator II, REL T-5, refurbished AR XA w/Nagaoka MP-200 & VPI cabling, Linn Klimax DSM Renew, Shunyata PS8 w/Defender & Viper, Nordost Blue Heaven PC & IC, Shunyata Venom sc, Symposium Svelte Shelves

Workshop: Vintage Yamaha CA-1010 & CT-1010, PSB Imagine Mini, Squeezebox Touch, Schiit BiFrost, AZ & WW cables

Digital Streaming source: SonicTransporter i7 w/Roon, Synology DS420+, English Electric 8switch

Personal audio: Woo WA6, WA7 & WA8; Auralic Aries Mini, Sonore MicroRendu & UltraRendu; Shure SE535, Shure SH1540, Westone ES50 Custom, Sennheiser HD820, MrSpeakers Aeon Flow C; Various Moon Audio dragons

Video: Sony XBR65X850C; Apple TV-4; Vienna Schönberg L/R, Webern center & surrounds; REL T1, T2, & T3; Arcam AVR850; Cambridge Audio 752BD; MIT-EXP SC

Last edited by Antonmb; 11-17-2018 at 09:12 PM.
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