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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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D'Agostino Momentum S250 MxV & HD pre; Linn Klimax Organik DSM, SonicTransporter, EtherRegen; Acoustic Signature Typhoon Neo, Koetsu RSP, Boulder 1108; Sf Il Cremonese; Shunyata Everest, Altaira, Sigma & Alpha v2
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Old 11-16-2018, 11:14 PM
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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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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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D'Agostino Momentum S250 MxV & HD pre; Linn Klimax Organik DSM, SonicTransporter, EtherRegen; Acoustic Signature Typhoon Neo, Koetsu RSP, Boulder 1108; Sf Il Cremonese; Shunyata Everest, Altaira, Sigma & Alpha v2
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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
D'Agostino Momentum S250 MxV & HD pre; Linn Klimax Organik DSM, SonicTransporter, EtherRegen; Acoustic Signature Typhoon Neo, Koetsu RSP, Boulder 1108; Sf Il Cremonese; Shunyata Everest, Altaira, Sigma & Alpha v2
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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

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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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Old 11-17-2018, 09:01 PM
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Default Momentum pre - using 2nd output for headphone amp

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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.
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D'Agostino Momentum S250 MxV & HD pre; Linn Klimax Organik DSM, SonicTransporter, EtherRegen; Acoustic Signature Typhoon Neo, Koetsu RSP, Boulder 1108; Sf Il Cremonese; Shunyata Everest, Altaira, Sigma & Alpha v2

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