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Old 11-16-2018, 11:10 PM
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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; Linn Uphorik; Rega RP10 w/Rega Aphelion; Sonus Faber Amati Futura; Shunyata Denali 6000T, Alpha NR & various Ztron powersnakes; Shunyata Ztron Cobra IC & SC; Quadraspire Sunoko-Vent T, Stillpoints Ultra SS & Mini, HRS Damping Plates; SonicTransporter i7 & Synology DS412+; Audio Desk Pro
Personal audio: Woo Audio WA6, WA7 & WA8; Auralic Aries Mini, Sonore MicroRendu, A&K AK100 II, AKG Q701, Shure SE535, Shure SH1540, Westone ES50 Custom, Sennheiser HD800, MrSpeakers Aeon Flow C, Various Moon Audio dragons
2nd system: Luxman SQ-N100, PSB Imagine Mini, REL T-5, refurbished AR XA w/Nagaoka MP-200 & VPI cabling, Linn Klimax DSM Renew, Shunyata Venom PS8 w/Defender & Viper, Nordost Blue Heaven power & IC, Acoustic Zen sc, Symposium Svelte Shelves
Workshop: Vintage Yamaha CA-1010 amp & CT-1010 tuner, Martin Logan Motion 4, Squeezebox Touch, Schiit BiFrost, AZ & WW cables
Video: 65” Sony XBR65X850C; Vienna Acoustics Schönberg L/R, Webern center & surrounds; REL T1/T2/T3 subs; 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: Ayre C-5xeMP SACD/DVD audio player. Analog: VPI Classic Signature, Dynavector XX2 mkII cartridge. Phono Preamp: Audio Research Ref 2 SE
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Old 11-16-2018, 11:23 PM
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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.
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"Have you seen the stars tonight?"
________________________________
Main system: Linn Klimax Katalyst DSM; D’Agostino Momentum S250; Linn Uphorik; Rega RP10 w/Rega Aphelion; Sonus Faber Amati Futura; Shunyata Denali 6000T, Alpha NR & various Ztron powersnakes; Shunyata Ztron Cobra IC & SC; Quadraspire Sunoko-Vent T, Stillpoints Ultra SS & Mini, HRS Damping Plates; SonicTransporter i7 & Synology DS412+; Audio Desk Pro
Personal audio: Woo Audio WA6, WA7 & WA8; Auralic Aries Mini, Sonore MicroRendu, A&K AK100 II, AKG Q701, Shure SE535, Shure SH1540, Westone ES50 Custom, Sennheiser HD800, MrSpeakers Aeon Flow C, Various Moon Audio dragons
2nd system: Luxman SQ-N100, PSB Imagine Mini, REL T-5, refurbished AR XA w/Nagaoka MP-200 & VPI cabling, Linn Klimax DSM Renew, Shunyata Venom PS8 w/Defender & Viper, Nordost Blue Heaven power & IC, Acoustic Zen sc, Symposium Svelte Shelves
Workshop: Vintage Yamaha CA-1010 amp & CT-1010 tuner, Martin Logan Motion 4, Squeezebox Touch, Schiit BiFrost, AZ & WW cables
Video: 65” Sony XBR65X850C; Vienna Acoustics Schönberg L/R, Webern center & surrounds; REL T1/T2/T3 subs; 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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"Have you seen the stars tonight?"
________________________________
Main system: Linn Klimax Katalyst DSM; D’Agostino Momentum S250; Linn Uphorik; Rega RP10 w/Rega Aphelion; Sonus Faber Amati Futura; Shunyata Denali 6000T, Alpha NR & various Ztron powersnakes; Shunyata Ztron Cobra IC & SC; Quadraspire Sunoko-Vent T, Stillpoints Ultra SS & Mini, HRS Damping Plates; SonicTransporter i7 & Synology DS412+; Audio Desk Pro
Personal audio: Woo Audio WA6, WA7 & WA8; Auralic Aries Mini, Sonore MicroRendu, A&K AK100 II, AKG Q701, Shure SE535, Shure SH1540, Westone ES50 Custom, Sennheiser HD800, MrSpeakers Aeon Flow C, Various Moon Audio dragons
2nd system: Luxman SQ-N100, PSB Imagine Mini, REL T-5, refurbished AR XA w/Nagaoka MP-200 & VPI cabling, Linn Klimax DSM Renew, Shunyata Venom PS8 w/Defender & Viper, Nordost Blue Heaven power & IC, Acoustic Zen sc, Symposium Svelte Shelves
Workshop: Vintage Yamaha CA-1010 amp & CT-1010 tuner, Martin Logan Motion 4, Squeezebox Touch, Schiit BiFrost, AZ & WW cables
Video: 65” Sony XBR65X850C; Vienna Acoustics Schönberg L/R, Webern center & surrounds; REL T1/T2/T3 subs; 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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Power: Nordost Full QRT Power Product Line, Furutech GTX-D NCF/GTX Wall Plate/105D Cover, Dedicated 20 Amp Circuits with Surge Protection at Panel
Cables, Isolation, Reflection and Absorption: Nordost Reference Line on pre/monos, speaker and server. Ansuz C2 Power and XLR on DAC/Transport, HRS M3X Platforms & Damping Plates. Stillpoint’s Ultra 6 & Ultra SS, and Vicoustic Room Treatments.
Power and Sound: D’Agostino Pre Amplifier to D’Agostino Momentum Mono’s driving Wilson Alexia’s.
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  #7  
Old 11-17-2018, 09:01 PM
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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; Linn Uphorik; Rega RP10 w/Rega Aphelion; Sonus Faber Amati Futura; Shunyata Denali 6000T, Alpha NR & various Ztron powersnakes; Shunyata Ztron Cobra IC & SC; Quadraspire Sunoko-Vent T, Stillpoints Ultra SS & Mini, HRS Damping Plates; SonicTransporter i7 & Synology DS412+; Audio Desk Pro
Personal audio: Woo Audio WA6, WA7 & WA8; Auralic Aries Mini, Sonore MicroRendu, A&K AK100 II, AKG Q701, Shure SE535, Shure SH1540, Westone ES50 Custom, Sennheiser HD800, MrSpeakers Aeon Flow C, Various Moon Audio dragons
2nd system: Luxman SQ-N100, PSB Imagine Mini, REL T-5, refurbished AR XA w/Nagaoka MP-200 & VPI cabling, Linn Klimax DSM Renew, Shunyata Venom PS8 w/Defender & Viper, Nordost Blue Heaven power & IC, Acoustic Zen sc, Symposium Svelte Shelves
Workshop: Vintage Yamaha CA-1010 amp & CT-1010 tuner, Martin Logan Motion 4, Squeezebox Touch, Schiit BiFrost, AZ & WW cables
Video: 65” Sony XBR65X850C; Vienna Acoustics Schönberg L/R, Webern center & surrounds; REL T1/T2/T3 subs; Arcam AVR850; Cambridge Audio 752BD; MIT-EXP SC

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