原有USB DAC32有平衡輸出,所以想加平衡擴,建構一個全平衡的系統!
首先買進一條 CablePro HD800 Balanced Headphone Cable, 另外有附一條轉接線回6.3
![[請益] Schiit Audio MJOLNIR 全平衡耳擴是否無法改單端 (XLR to 6.3)](http://attach.mobile01.com/attach/201307/mobile01-fa30922c13f3b835bb71c707095e263d.jpg)
接著在amazon購買Schiit Audio MJOLNIR,....還沒送來所以先研究一下!
MJOLNIR
![[請益] Schiit Audio MJOLNIR 全平衡耳擴是否無法改單端 (XLR to 6.3)](http://attach.mobile01.com/attach/201307/mobile01-2a7d511ef9d3b5ef57360546413f4e17.jpg)
![[請益] Schiit Audio MJOLNIR 全平衡耳擴是否無法改單端 (XLR to 6.3)](http://attach.mobile01.com/attach/201307/mobile01-2b6ddd70b21355daaeec8d9e63ff2aa3.jpg)
![[請益] Schiit Audio MJOLNIR 全平衡耳擴是否無法改單端 (XLR to 6.3)](http://attach.mobile01.com/attach/201307/mobile01-657a18448fffe3616c24053bd57e8f5c.jpg)
Specifications*
Frequency Response: 20Hz-20Khz, -0.1db, 2Hz-400KHz, -3dB
Maximum Power, 32 ohms: 8.0W
Maximum Power, 50 ohms: 5.0W
Maximum Power, 300 ohms: 850mW
Maximum Power, 600 ohms: 425mW
THD: <0.006%, 20Hz-20KHz, at 1V RMS
IMD: <0.008%, CCIR
SNR: >104db, unweighted, referenced to 1V RMS
Crosstalk: >-75dB, 20 Hz-20KHz
Output Impedance: 1.5 ohms
Gain: 8 (18db)
Topology: Fully discrete FET, cross-shunt push-pull Crossfet output stage, no overall feedback, noninverting, single voltage gain stage
Power Supply: specific Circlotron 4-primary output stage transformer with over 65,000uF filter capacitance, plus dedicated transformer for high-voltage asymmetrical discrete-regulated front end stage with 90V/25V rails and over 15,000uf of filter capacitance
Inputs: one pair balanced XLR, one pair single-ended RCAs, choose one
Outputs: one 4-pin balanced female XLR, one pair dual 3-pin female XLR, and one pair male XLR preamp outs
Power Consumption: 45W
Size: 16 x 8.75 x 2.25”
Weight: 13 lbs
問題來了!這台全平衡擴似乎加了內部保護裝置, 無法像Bobby接XLR轉6.3使用
(線實在好貴..

下面內容有幾段話:
About MJOLNIR
Q: Okay, fine, another balanced amp. Who cares?
A: Wait a sec, bub! This isn’t just another balanced amp where they throw two of the same gain stages in and run one inverted. It isn’t a balanced-to-single-ended-to-balanced amp either. It’s a real balanced amp from input to output, and it’s the only dedicated headphone amp based on a Circlotron-style topology.
Q: What the hell is a Circlotron, and why do I need it?
A: “Circlotron” was the first commercial name for a cross-shunt push-pull output stage. At the time, it used tubes. We use JFET inputs and MOSFET outputs, so we call our topology Crossfet™.
Q: Why no single-ended outputs?
A: The circlotron-style topology is inherently balanced. You can’t get a single-ended output from it easily. To do that, we’d have to have an entirely separate gain stage, or sum the outputs, or have some kinda wacked out output-stage-switching arrangement—all of which we tried, and decided they screwed up the basic performance of the amp too much. So, no single-ended, sorry.
Q: That’s cool, I’ll just use an adapter for my single-ended headphones, right?
A: One word: boom. Well, not actually, but you will trigger the internal protection.
想請益各位先進達人, 是否有方法解決?
(往好處想,它真是全平衡應該沒錯)
謝謝!
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耳機: HD800, K702-65, Q701, ED8, LCD-2, VMODA-LP..